CN119674519B - A broadband circularly polarized filter patch antenna - Google Patents
A broadband circularly polarized filter patch antennaInfo
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- CN119674519B CN119674519B CN202411834680.7A CN202411834680A CN119674519B CN 119674519 B CN119674519 B CN 119674519B CN 202411834680 A CN202411834680 A CN 202411834680A CN 119674519 B CN119674519 B CN 119674519B
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Abstract
本发明公开了一种宽带圆极化滤波贴片天线，包括上、下层介质基板，上层介质基板上印刷有主辐射贴片、竖向矩形寄生贴片、横向矩形寄生贴片与L型贴片，主辐射贴片上加载了矩形槽，竖向矩形寄生贴片沿上层介质基板的y方向放置，横向矩形寄生贴片沿x方向放置，L型贴片沿主辐射贴片负45°对角线放置；下层介质基板上印刷有地板和微带馈线，地板中下方蚀刻有U型槽，信号从端口进入，经微带馈线，通过U型槽耦合到主辐射贴片，再由主辐射贴片耦合激励到周边的寄生贴片。利用本发明提供的宽带圆极化滤波贴片天线，将圆极化特性和带通滤波特性进行一体化设计，获得了良好的阻抗带宽和圆极化带宽，解决了滤波电路引入导致增益下降，尺寸大等问题。
The present invention discloses a broadband circularly polarized filter patch antenna, comprising upper and lower dielectric substrates. The upper dielectric substrate is printed with a main radiating patch, a vertical rectangular parasitic patch, a horizontal rectangular parasitic patch, and an L-shaped patch. The main radiating patch is loaded with a rectangular slot. The vertical rectangular parasitic patch is placed along the y-direction of the upper dielectric substrate, the horizontal rectangular parasitic patch is placed along the x-direction, and the L-shaped patch is placed along the negative 45° diagonal of the main radiating patch. The lower dielectric substrate is printed with a floor and a microstrip feeder. A U-shaped slot is etched in the lower middle portion of the floor. Signals enter from a port, pass through the microstrip feeder, and are coupled to the main radiating patch through the U-shaped slot. The main radiating patch then couples and excites the surrounding parasitic patches. The broadband circularly polarized filter patch antenna provided by the present invention integrates circular polarization characteristics and bandpass filtering characteristics, achieving good impedance bandwidth and circular polarization bandwidth, and solving problems such as gain reduction and large size caused by the introduction of filtering circuits.
Description
Technical Field
The invention relates to the technical field of radio frequency communication, in particular to a broadband circularly polarized filter patch antenna.
Background
Antennas are an integral part of wireless communication systems and play a vital role in wireless communications as devices that transmit and receive electromagnetic waves. With the rapid development of mobile communication technology and various wireless systems, wideband circularly polarized filter patch antennas capable of significantly improving communication quality have been attracting attention. Patch antennas are widely used because of their low profile, miniaturization, low cost, and the like.
With the development of unmanned aerial vehicle technology and aerospace technology, the coverage of an antenna is expanded, and the linear polarization antenna has difficulty in meeting the application requirements, so that the circular polarization antenna has a plurality of advantages. At present, a linear polarization working mode is commonly used in the aspect of wireless communication, but a single polarization mode can not meet the requirements of positioning, navigation and the like, and particularly, a circular polarization antenna has the advantages of rain fog resistance, multipath interference resistance and high receiving efficiency, so that the circular polarization antenna is widely popularized in satellite navigation systems. Meanwhile, the antenna and the filter are the most important two components of the radio frequency front-end circuit, and the size and the performance of the antenna and the filter are critical to the quality of the whole system. The traditional design method designs the antenna and the filter separately, so that the problem of loss caused by incomplete matching exists when the two devices are cascaded, and the filter antenna formed by integrating the antenna and the filter has the radiation characteristic and the filter characteristic at the same time, and the integral size of a circuit and unnecessary energy loss among the devices can be greatly reduced, so that the filter circularly polarized antenna also becomes a hot spot for research of domestic and foreign students.
In the context of rapid alternation in the communications technology era, researchers have proposed a number of solutions for integrally designing a filter antenna and a circularly polarized antenna, such as loading a filter circuit on a microstrip antenna. However, these methods have more or less non-negligible drawbacks, in which the most obvious is serious gain drop, too narrow bandwidth, and the like, which are difficult to meet the practical application requirements of the communication system. It is therefore necessary to design a new wideband circularly polarized filter patch antenna to solve the above problems.
Disclosure of Invention
The invention provides a broadband circularly polarized filter patch antenna, which aims to solve at least one technical problem existing in the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides a broadband circular polarization filter patch antenna, includes upper dielectric substrate and lower floor's dielectric substrate, lower floor's dielectric substrate is located the below of upper dielectric substrate, there is the air gap upper dielectric substrate and lower floor's dielectric substrate between, upper surface printing of upper dielectric substrate has main radiation paster, vertical rectangle parasitic paster, horizontal rectangle parasitic paster and L type paster, the rectangular tank along x direction has been loaded in the middle left position of main radiation paster, vertical rectangle parasitic paster is followed upper dielectric substrate's y direction is placed, horizontal rectangle parasitic paster is followed upper dielectric substrate's x direction is placed, L type paster is followed main radiation paster negative 45 diagonal;
The upper surface of lower floor's dielectric substrate is printed with the floor, the below etching in the middle of floor has the U type groove, the lower surface of lower floor's dielectric substrate is printed with microstrip feeder, and the signal gets into from the port, through microstrip feeder, through U type groove coupling to main radiation paster, again by main radiation paster coupling excitation is to peripheral parasitic paster.
As the preferred embodiment of the invention, the number of the L-shaped patches is two, the sizes of the L-shaped patches are the same, the L-shaped patches are positioned among the vertical rectangular parasitic patches, the horizontal rectangular parasitic patches and the main radiation patches, the L-shaped patches comprise a first L-shaped patch and a second L-shaped patch, the first L-shaped patch and the second L-shaped patch are both made of metal, the first L-shaped patch and the second L-shaped patch are both arranged along the negative 45-degree diagonal line of the main radiation patch, and the edges, close to the first L-shaped patch, of the main radiation patch are respectively cut off a rectangle with the same size for adjusting impedance matching.
As a preferred embodiment of the present invention, the inner corners of the first L-shaped patch and the second L-shaped patch are cut with a rectangle with the same size, respectively, for realizing impedance matching;
And generating a radiation zero point through the loaded L-shaped patch, and changing the length of the L-shaped patch for controlling the radiation zero point.
As a preferred embodiment of the invention, the number of the transverse rectangular parasitic patches is two, the sizes of the transverse rectangular parasitic patches are the same, the shape of the transverse rectangular parasitic patches is rectangular, the transverse rectangular parasitic patches comprise a first transverse rectangular parasitic patch and a second transverse rectangular parasitic patch, the first transverse rectangular parasitic patch and the second transverse rectangular parasitic patch are symmetrically distributed about the center of the main radiation patch, and are respectively placed at the upper edge and the lower edge of the upper medium substrate along the x direction, and the main radiation patch is coupled with the transverse rectangular parasitic patch to generate a circularly polarized radiation frequency point.
As the preferred embodiment of the invention, the number of the vertical rectangular parasitic patches is two, the sizes of the vertical rectangular parasitic patches are the same, the vertical rectangular parasitic patches are rectangular, the vertical rectangular parasitic patches comprise a first vertical rectangular parasitic patch and a second vertical rectangular parasitic patch, the first vertical rectangular parasitic patch and the second vertical rectangular parasitic patch are symmetrically distributed about the center of the main radiation patch, the first vertical rectangular parasitic patch and the second vertical rectangular parasitic patch are respectively placed at the left edge and the right edge of the upper medium substrate along the y direction, the length of the vertical rectangular parasitic patch on the lower surface is larger than that of the horizontal rectangular parasitic patch on the upper surface, the width of the horizontal rectangular parasitic patch is larger than that of the vertical rectangular parasitic patch, and the vertical rectangular parasitic patch is coupled to the lower surface through the main radiation patch to generate a circularly polarized radiation frequency point.
As a preferred embodiment of the invention, the U-shaped groove is asymmetrically arranged, the left side is shorter than the right side, the U-shaped groove generates a radiation zero point, and the length of the U-shaped groove in the vertical direction is adjusted to control the radiation zero point;
meanwhile, the microstrip feeder is coupled to the main radiation patch through the U-shaped groove to generate a circularly polarized radiation frequency point.
As a preferred embodiment of the present invention, the microstrip feeder includes a first parallel branch, a second parallel branch, a third parallel branch and a fourth parallel branch, the first parallel branch, the second parallel branch and the third parallel branch loaded on the microstrip feeder are used for adjusting impedance matching, the third parallel branch and the fourth parallel branch have the same shape and the same size, the width of the second parallel branch is larger than that of the third parallel branch and the fourth parallel branch, and the port is connected with the floor at the starting end of the microstrip feeder;
signals enter from the port, are coupled to the main radiation patch through the microstrip feeder line and are coupled and excited to the peripheral parasitic patch by the main radiation patch.
Compared with the prior art, the broadband circularly polarized filter patch antenna provided by the invention has the following beneficial effects:
1. the antenna designed by the invention is characterized in that an asymmetric U-shaped groove is etched on the floor, a microstrip feeder is coupled to a main radiation patch through the groove, a circular polarization radiation frequency point can be generated, a pair of rectangular parasitic patches loaded in the horizontal direction of the main radiation patch can be used for generating a second circular polarization radiation frequency point, and another pair of rectangular parasitic patches with different sizes loaded in the vertical direction of the main radiation patch can be used for generating a third circular polarization radiation frequency point, so that the broadband circular polarization radiation performance is realized.
2. According to the antenna designed by the invention, the pair of L-shaped metal patches is loaded between the main radiation patch and the parasitic patch placed in the horizontal direction, so that currents on the L-shaped metal patch and the main radiation patch are reversed, and a controllable radiation zero point is generated.
3. The antenna designed by the invention can be used for exciting the main radiation patch to generate circular polarization performance and also can enable reverse current to be formed in the vertical direction of the main radiation patch to generate a controllable radiation zero point through the asymmetric U-shaped groove etched on the floor.
4. According to the antenna designed by the invention, the length of the L-shaped metal patch is adjusted to generate a radiation zero point at low frequency, and then the length of the asymmetric U-shaped groove in the vertical direction is adjusted to generate a radiation zero point at high frequency, so that the antenna finally realizes broadband circular polarization radiation performance with good band-pass filter response.
Compared with other antennas, the antenna designed by the invention has wider axial ratio bandwidth, does not need to generate radiation zero points by adding a filter network or overlapping structures in the vertical direction, realizes band-pass filter response, and has good gain pattern stability.
Drawings
Fig. 1 is a schematic structural view of an antenna structure of the present invention;
Fig. 2 is a side view of the antenna structure of the present invention;
FIG. 3 is a top view of an upper dielectric substrate;
FIG. 4 is a bottom view of an upper dielectric substrate;
FIG. 5 is a top view of an underlying dielectric substrate;
FIG. 6 is a bottom view of an underlying dielectric substrate;
FIG. 7 is a diagram showing simulation results of S parameters and main polarization gains of the wideband circularly polarized patch antenna according to the present embodiment;
FIG. 8 is a diagram showing the simulation result of the axial ratio of the wideband circularly polarized filter patch antenna of the present embodiment;
fig. 9 is a graph of simulation results of the main polarization and cross polarization gains of the wideband circularly polarized patch antenna according to the present embodiment as a function of frequency;
FIG. 10 is a diagram of simulation results of an XOZ plane pattern of the wideband circularly polarized filtered patch antenna of the present embodiment at a frequency of 2.78 GHz;
FIG. 11 is a diagram showing simulation results of YOZ plane pattern of the wideband circularly polarized filter patch antenna of the present embodiment at 2.78GHz frequency;
FIG. 12 is a diagram of simulation results of an XOZ plane pattern of the wideband circularly polarized filtered patch antenna of the present embodiment at a frequency of 2.98 GHz;
FIG. 13 is a diagram showing simulation results of YOZ plane pattern of the wideband circularly polarized filter patch antenna of the present embodiment at 2.98GHz frequency;
FIG. 14 is a diagram showing simulation results of an XOZ plane pattern of the wideband circularly polarized filtered patch antenna of the present embodiment at a frequency of 3.06 GHz;
FIG. 15 is a diagram showing simulation results of YOZ plane pattern of the wideband circularly polarized filter patch antenna of the present embodiment at 3.06GHz frequency;
in the figure, a dielectric substrate at the upper layer, a rectangular slot, a vertical rectangular parasitic patch, a first vertical rectangular parasitic patch, a second vertical rectangular parasitic patch, a transverse rectangular parasitic patch, a first transverse rectangular parasitic patch, a second transverse rectangular parasitic patch, a 5L-shaped patch, a 5a L-shaped patch, a 5b L-shaped patch, a second L-shaped patch, a dielectric substrate at the upper layer, a 7, a floor, an 8, a U-shaped slot, a 9, a microstrip feeder, a 9a, a first parallel branch, a 9b, a second parallel branch, a 9c, a third parallel branch, a 9d, a fourth parallel branch, a 10, a dielectric substrate at the lower layer, and a port are arranged at the upper layer, wherein the upper layer is provided with a plurality of vertical rectangular parasitic patches, the first vertical rectangular parasitic patch, the horizontal rectangular parasitic patch, the transverse rectangular parasitic patch and the first transverse rectangular parasitic patch are respectively provided with a plurality of horizontal rectangular patches and the horizontal rectangular patch and the horizontal parasitic patch are respectively 20.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1-6, the present embodiment provides a wideband circularly polarized filter patch antenna, which includes an upper dielectric substrate 6 and a lower dielectric substrate 10, the lower dielectric substrate 10 is located below the upper dielectric substrate 6, an air gap exists between the upper dielectric substrate 6 and the lower dielectric substrate 10, a main radiation patch 1, a vertical rectangular parasitic patch 3, a horizontal rectangular parasitic patch 4 and an L-shaped patch 5 are printed on an upper surface of the upper dielectric substrate 6, a rectangular slot 2 along an x direction is loaded in a position of the middle left of the main radiation patch 1, the vertical rectangular parasitic patch 3 is placed along a y direction of the upper dielectric substrate 6, the horizontal rectangular parasitic patch 4 is placed along the x direction of the upper dielectric substrate 6, and the L-shaped patch 5 is placed along a negative 45 ° diagonal line of the main radiation patch 1;
the upper surface of the lower layer dielectric substrate 10 is printed with a floor 7, a U-shaped groove 8 is etched below the middle of the floor 7, the lower surface of the lower layer dielectric substrate 10 is printed with a microstrip feeder 9, signals enter from a port 20, are coupled to the main radiation patch 1 through the U-shaped groove 8 through the microstrip feeder 9, and are coupled and excited to peripheral parasitic patches by the main radiation patch 1.
In this embodiment, the upper dielectric substrate 6 and the lower dielectric substrate 10 are dielectric substrates with the same material and different thicknesses, the upper surface of the upper dielectric substrate 6 is provided with a main radiation patch 1, a vertical rectangular parasitic patch 3, a horizontal rectangular parasitic patch 4 and an L-shaped patch 5, a rectangular slot 2 along the x direction is loaded in the middle left position of the main radiation patch 1, a floor 7 is printed on the upper surface of the lower dielectric substrate 10, a U-shaped slot 8 is etched below the middle of the floor 7, a microstrip feeder 9 is printed on the lower surface of the lower dielectric substrate 10, signals enter from a port 20, are coupled to the main radiation patch 1 through the microstrip feeder 9 and are then coupled and excited to the peripheral parasitic patch by the main radiation patch 1. Under the condition of ensuring smaller device size, the circular polarization characteristic and the band-pass filter characteristic are integrally designed, and meanwhile, good impedance bandwidth and circular polarization bandwidth are obtained, so that the problems of gain reduction, large size and the like caused by the introduction of a filter circuit are solved.
1-3, The number of the L-shaped patches 5 is two, the sizes of the L-shaped patches 5 are the same, the L-shaped patches 5 are L-shaped, the L-shaped patches 5 are positioned among the vertical rectangular parasitic patches 3, the horizontal rectangular parasitic patches 4 and the main radiation patch 1, the L-shaped patches 5 comprise a first L-shaped patch 5a and a second L-shaped patch 5b, the first L-shaped patch 5a and the second L-shaped patch 5b are made of metal, the first L-shaped patch 5a and the second L-shaped patch 5b are all placed along a negative 45-degree diagonal line of the main radiation patch 1, the edges of the main radiation patch 1 close to the first L-shaped patch 5a are respectively cut off a rectangle with the same size for adjusting impedance matching,
1-3, The inner corners of the first L-shaped patch 5a and the second L-shaped patch 5b are respectively cut with a rectangle with the same size for realizing impedance matching;
And generating a radiation zero point through the loaded L-shaped patch 5, and changing the length of the L-shaped patch 5 for controlling the radiation zero point.
In this embodiment, a controllable radiation zero point is generated by the loaded L-shaped patch 5, and a radiation zero point is generated at a low frequency by adjusting the length of the L-shaped metal patch.
1-3, The number of the transverse rectangular parasitic patches 4 is two, the sizes of the transverse rectangular parasitic patches 4 are the same, the shape of the transverse rectangular parasitic patches 4 is rectangular, the transverse rectangular parasitic patches 4 comprise a first transverse rectangular parasitic patch 4a and a second transverse rectangular parasitic patch 4b, the first transverse rectangular parasitic patch 4a and the second transverse rectangular parasitic patch 4b are symmetrically distributed about the center of the main radiation patch 1, and are respectively placed at the upper edge and the lower edge of the upper dielectric substrate 6 along the x direction, and the transverse rectangular parasitic patches 4 are coupled through the main radiation patch 1 to generate a circularly polarized radiation frequency point.
In this embodiment, a pair of transversal rectangular parasitic patches 4 with the same size are printed on the upper surface of the upper dielectric substrate 6, the two transversal rectangular parasitic patches 4 are symmetrically distributed about the center of the main radiation patch 1, and are respectively placed at the upper and lower edges of the upper dielectric substrate 6 along the x direction, and coupled to the transversal rectangular parasitic patches 5 through the main radiation patch 1, so that a first circularly polarized radiation frequency point (2.98 GHz) can be generated.
1-4, The number of the vertical rectangular parasitic patches 3 is two, the sizes are the same, the shape of the vertical rectangular parasitic patch 3 is rectangular, the vertical rectangular parasitic patch 3 comprises a first vertical rectangular parasitic patch 3a and a second vertical rectangular parasitic patch 3b, the first vertical rectangular parasitic patch 3a and the second vertical rectangular parasitic patch 3b are symmetrically distributed about the center of the main radiation patch 1, are respectively placed at the left edge and the right edge of the upper medium substrate 6 along the y direction, the length of the vertical rectangular parasitic patch 3 on the lower surface is larger than that of the horizontal rectangular parasitic patch 4 on the upper surface, the width of the horizontal rectangular parasitic patch 4 is larger than that of the vertical rectangular parasitic patch 3, and the vertical rectangular parasitic patch 3 is coupled to the vertical rectangular parasitic patch 3 on the lower surface through the main radiation patch 1 to generate a circularly polarized radiation frequency point.
In this embodiment, by coupling the main radiation patch 1 to a pair of vertical rectangular parasitic patches 3 whose upper surface is placed along the x-direction and a pair of horizontal rectangular parasitic patches 4 whose lower surface is placed along the y-direction, another circularly polarized radiation frequency point (2.98 GHz) can be generated respectively, the axial ratio bandwidth is widened, and broadband performance is realized.
1-6, The U-shaped groove 8 is asymmetrically arranged, the left side is shorter than the right side, the U-shaped groove 8 generates a radiation zero point, and the length of the U-shaped groove 8 in the vertical direction is adjusted to control the radiation zero point;
meanwhile, through the U-shaped groove 8, the microstrip feeder 9 is coupled to the main radiation patch 1 through the U-shaped groove 8, and a circularly polarized radiation frequency point is generated.
In this embodiment, the upper surface of the lower dielectric substrate 10 is printed with a floor 7, an asymmetric U-shaped slot 8 is etched below and in the middle of the floor 7, the left side of the asymmetric U-shaped slot 8 is shorter than the right side, the asymmetric U-shaped slot 8 can form reverse current in the vertical direction of the main radiation patch 1, a controllable radiation zero point is generated, the length of the asymmetric U-shaped slot 8 in the vertical direction is adjusted to enable the radiation zero point to be located at a high frequency, and meanwhile, a microstrip feeder 9 is coupled to the main radiation patch through the asymmetric U-shaped slot 8, so that a third circularly polarized radiation frequency point (2.78 GHz) can be generated.
1-6, The microstrip feeder 9 comprises a first parallel branch 9a, a second parallel branch 9b, a third parallel branch 9c and a fourth parallel branch 9d, the first parallel branch 9a, the second parallel branch 9b and the third parallel branch 9c loaded on the microstrip feeder 9 are used for adjusting impedance matching, the third parallel branch 9c and the fourth parallel branch 9d have the same shape and the same size, the width of the second parallel branch 9b is larger than that of the third parallel branch and the fourth parallel branch 9d, and the port 20 is connected with the floor 8 at the starting end of the microstrip feeder 10;
signals enter from the port 20, are coupled to the main radiating patch 1 through the microstrip feed 9 via the U-shaped slot 8, and are then coupled and excited to the surrounding parasitic patch by the main radiating patch 1.
Fig. 7 is a graph of simulation results of S parameters and main polarization gain of the wideband circularly polarized patch antenna of the embodiment, where the frequency band of S parameters lower than-10 dB is 2.69-3.35GHz (21.85%), one radiation zero point in the low-frequency stop band is 2.0GHz, and one radiation zero point in the high-frequency stop band is 3.67GHz, so that the low frequency has a good out-of-band rejection effect from 2.5GHz to the top, and the high frequency also has a good out-of-band rejection effect from 3.5GHz to the top, and a good band-pass filter response is obtained.
Fig. 8 is a diagram of simulation results of the axial ratio of the wideband circularly polarized filter patch antenna of the present embodiment, the axial ratio bandwidth is 2.71GHz-3.08GHz (12.78%) below-3 dB, the three axial ratio frequency points are respectively 2.78GHz, 2.98GHz and 3.06GHz,2.78GHz are respectively introduced by the asymmetric U-shaped grooves etched on the floor, 2.98GHz is generated by a pair of rectangular parasitic patches on the upper surface of the upper layer dielectric substrate, and 3.06GHz is generated by a pair of rectangular parasitic patches on the lower surface of the upper layer dielectric substrate.
Fig. 9 is a graph of simulation results of the main polarization and cross polarization gain of the wideband circularly polarized patch antenna according to the present embodiment, and it can be seen that there is good cross polarization in the axial ratio bandwidth.
FIGS. 10-11 are graphs of simulation results of the XOZ plane and YOZ plane patterns of the wideband circularly polarized filter patch antenna of the present embodiment at a frequency of 2.78GHz, and it can be seen that the circular polarization direction of the frequency point is right-hand circular polarization (RHCP);
FIGS. 12-13 are graphs of simulation results of the XOZ plane and YOZ plane patterns of the wideband circularly polarized filter patch antenna of the present embodiment at a frequency of 2.98GHz, and it can be seen that the circular polarization direction of the frequency point is right-hand circular polarization (RHCP);
FIGS. 14-15 are graphs of simulation results of the XOZ plane and YOZ plane patterns of the wideband circularly polarized filter patch antenna of the present embodiment at a frequency of 3.06GHz, and it can be seen that the circular polarization direction of the frequency point is right-hand circular polarization (RHCP);
The invention changes the common slot into an asymmetric U-shaped slot 8 on the basis of a broadband circularly polarized patch antenna, can generate a circularly polarized radiation point and a controllable radiation zero point at the same time, and respectively generates a circularly polarized radiation point by coupling the main radiation patch 1 to a pair of vertical rectangular parasitic patches 3 which are arranged on the upper surface along the x direction and a pair of transverse rectangular parasitic patches 4 which are arranged on the lower surface along the y direction, so as to widen the axial ratio bandwidth and realize the broadband performance, and then a pair of L-shaped metal patches with equal size are loaded between the main radiation patch 2 and the rectangular parasitic patches to generate a controllable radiation zero point.
In summary, the invention realizes miniaturization by utilizing the advantages of low section and small volume of the patch antenna, etches two pairs of rectangular parasitic patches on the asymmetric U-shaped groove 8 and the upper dielectric substrate 6 on the floor, can respectively generate three circularly polarized radiation frequency points to realize wideband circular polarization performance, and the asymmetric U-shaped groove 8 and the pair of L-shaped metal patches can respectively generate two radiation zero points, adjust the lengths of the two radiation zero points to respectively generate one radiation zero point at high and low frequencies, thereby realizing bandpass filter response and solving the problems of gain reduction, large size and the like caused by the introduction of a filter circuit.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (4)
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| CN110112554A (en) * | 2019-05-13 | 2019-08-09 | 哈尔滨工程大学 | A kind of circular polarization microstrip antenna |
| CN110233342A (en) * | 2019-06-24 | 2019-09-13 | 西安空间无线电技术研究所 | A kind of complex impedance matching circular polarisation filter antenna |
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| EP2081251B1 (en) * | 2008-01-15 | 2018-07-11 | HMD Global Oy | Patch antenna |
| KR101660921B1 (en) * | 2015-08-11 | 2016-09-28 | 한국전자통신연구원 | Circularly polarized global positioning system antennas using parasitic strip lines |
| CN106025533A (en) * | 2016-07-11 | 2016-10-12 | 北京航大泰科信息技术有限公司 | Left-handed circularly polarized antenna |
| CN106450778B (en) * | 2016-11-30 | 2019-09-20 | 中山大学 | A Broadband Circular Polarization DRA and Its Design Method |
| CN212257675U (en) * | 2020-05-15 | 2020-12-29 | 南京工程学院 | Parasitic resonant ring circular polarization microstrip patch antenna |
| CN113381192B (en) * | 2021-06-15 | 2022-07-26 | 西安电子科技大学 | Low-profile filtering antenna with broadband external suppression |
| CN116093599A (en) * | 2023-03-23 | 2023-05-09 | 电子科技大学 | A Circularly Polarized Conformal Antenna for Curved Surface Carriers |
| CN117013259A (en) * | 2023-07-13 | 2023-11-07 | 浙江光珀智能科技有限公司 | Ka frequency band broadband circularly polarized liquid crystal phased array antenna unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112554A (en) * | 2019-05-13 | 2019-08-09 | 哈尔滨工程大学 | A kind of circular polarization microstrip antenna |
| CN110233342A (en) * | 2019-06-24 | 2019-09-13 | 西安空间无线电技术研究所 | A kind of complex impedance matching circular polarisation filter antenna |
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