CN101964451A - Low-section mobile communication indoor cover patch antenna - Google Patents
Low-section mobile communication indoor cover patch antenna Download PDFInfo
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- CN101964451A CN101964451A CN2010102597998A CN201010259799A CN101964451A CN 101964451 A CN101964451 A CN 101964451A CN 2010102597998 A CN2010102597998 A CN 2010102597998A CN 201010259799 A CN201010259799 A CN 201010259799A CN 101964451 A CN101964451 A CN 101964451A
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Abstract
本发明公开了一种低剖面移动通信室内覆盖贴片天线，包括在介质板一面上金属贴片和与金属贴片相连接的微带渐变线构成辐射单元、金属接地板，其特征在于：所述的金属接地板设在介质板的另一面，并通过同轴接头与辐射单元进行耦合，所述的微带渐变线与金属接地板之间设有LC匹配网络；采用上述结构，具有以下优点：1、在实现微带贴片天线的超宽带特性，又体现了微带天线的低剖面特性，特别是在驻波比小于1.4的情况下满足806-2700M移动通信可用频段。2、无需组阵、单端口馈电无需复杂的馈电系统的贴片天线，即可实现多频、宽带和低剖面。3、两个频段完全满足806MHz-2700MHz无线通信系统频段的要求。该微带天线制作简单，运行成本低，适合批量生产。
The invention discloses a low-profile mobile communication indoor covered patch antenna, which includes a metal patch on one side of a dielectric plate and a microstrip gradient line connected to the metal patch to form a radiation unit and a metal grounding plate, and is characterized in that: The metal grounding plate is arranged on the other side of the dielectric plate, and is coupled with the radiation unit through a coaxial joint, and an LC matching network is provided between the microstrip gradient line and the metal grounding plate; the above structure has the following advantages 1. Realizing the ultra-broadband characteristics of the microstrip patch antenna, and embodying the low-profile characteristics of the microstrip antenna, especially satisfying the available frequency band of 806-2700M mobile communication when the VSWR is less than 1.4. 2. There is no need for array formation and single-port feed. No complex feed system patch antenna is required, and multi-frequency, broadband and low profile can be achieved. 3. The two frequency bands fully meet the requirements of the 806MHz-2700MHz wireless communication system frequency band. The microstrip antenna is simple to manufacture, has low operating cost, and is suitable for mass production.
Description
Technical field
The present invention relates to the indoor cover antenna of mobile communication system and general-purpose system frequency domain, particularly a kind of low section mobile communication indoor that covers all available frequency bands of 800-2700MHz covers paster antenna.
Background technology.
At present, along with the arrival in 3G epoch, moving communicating field require general utility functions integrated, gain is little, the miniaturization of layout, densification direction develop.This just requires antenna to have features such as multifrequency, broadband, small size.There is the section height in indoor cover antenna in the past, defectives such as manufacturing process complexity, and what have includes only wherein one to two frequency range.Antenna manufacturing cost height is difficult to combine together with building like this.
Now, the research focus of field of antenna (particularly microstrip antenna) is aspects such as broadband, multifrequency, miniaturization.But most of research all concentrates on the research of 3.1GHz-11GHz ultra-wideband microstrip antenna, and main also in traditional dimensional antenna to the application of radio universal frequency range.Indoor cover antenna demand is big, the incompatibility era development requirement of traditional indoor cover antenna.Because the distinct advantages of micro-strip paster antenna, begun in the world microstrip antenna is researched and developed on indoor covering distributes, successful case puts goods on the market, but in these products, a common feature is all arranged, standing-wave ratio is than traditional antenna difference (the standing-wave ratio standard of traditional antenna is less than 1.5), and the microstrip antenna standing-wave ratio standard that applies to indoor covering system that has now designed is all greater than 1.5.The standard of our national indoor distribution standing-wave ratio is less than 1.5.The size of antenna is also bigger simultaneously.
Patent of invention ZL200510024288.7 has disclosed a kind of super wide band plane unipole antenna, this antenna is made of printed monopole antenna plate, coplane metal floor and embedded feed line on the dielectric-slab, and the unipole antenna plate is oval paster or circular patch or annular paster; Embedded feed line is a co-planar waveguide conduction band paster; The coplane metal floor is trapezoidal metal patch, about this metal patch is divided into two and adhere on the both sides of co-planar waveguide conduction band paster.Above-mentioned structure is the transporting mechanism of co-planar waveguide, and gain and standing-wave ratio are difficult to reach the requirement that mobile communications network uses in the frequency band range at place of the present invention.Both frequency bandwidth differences of while, it is a ultra broadband, if this antenna is using mobile communication indoor to cover, the interference free performance outside its band is relatively poor.This antenna adopts side feedback mode feed simultaneously, does not meet mobile communication chamber divided antenna use habit.Antenna has adopted co-planar waveguide gradual change feeding classification, has increased extra adjusting size, makes emulation and design difficulty increase, and the stability of performance is had certain influence.
Summary of the invention
Technical problem to be solved by this invention is, at the deficiencies in the prior art, provide a kind of make simple, cost is low, each general frequency range, the standing-wave ratio that can cover mobile communcations system covers paster antenna less than 1.4 low section mobile communication indoor.
A main shortcoming of microstrip antenna is that working band is narrow, and the relative standing-wave ratio bandwidth of general typical microstrip antenna is only about 2～5%.Be its standing-wave ratio bandwidth of broadening, the antenna worker has done a large amount of research, has proposed the method for multiple increase microstrip antenna standing-wave ratio bandwidth, summarizes and gets up mainly to comprise four kinds of approach:
1. reduce the Q value of equivalent resonant tank, as, E.chang etc. with the method that increases substrate thickness, can obtain 20% microstrip antenna bandwidth of operation by experiment;
2. modification equivalent electric circuit, adopts electromagnetic coupled feed etc. at additional parasitic patch, as, Y.uhinand and A.Hessell add the parasitic element that size is small on the microstrip antenna of probe coupling, can obtain 20 one 30% bandwidth of operation;
3. additional impedance matching network, as, H.M.An etc. add a reactance matching network between microstrip antenna input and microstrip feed line, can obtain 17% antenna bandwidth of operation;
4. along with to the going deep into of microstrip antenna research, people improve or have developed some new methods.For example adopt high-k e, and the method for perforate on dielectric-slab, promptly reduced the Q value, taken into account the antenna miniaturization advantage that high-k brings again; Open U-lag on the rectangular microband paste line, because additional resonance is introduced in the slit, also introduced capacitive reactance simultaneously, offset the induction reactance of probe, because of obtaining broadband effects, this paster antenna can obtain 47% impedance bandwidth; Adopt L shaped metal tape can obtain 49% impedance bandwidth (vswR≤2) to single-layer sheet antenna feed, and by improving, change L shaped metal tape into ramp shaped, then bandwidth can broadening to 53%; Adopt co-planar waveguide or little band by the slit feed that is coupled, obtain the expansion of bandwidth equally.Novelly beautify indoor cover antenna and have extensive market prospects.Traditional monopole antenna has the ultra broadband characteristic, and this theory is applied to the design of microstrip antenna, has broadband properties equally.
For solving the problems of the technologies described above, technical scheme of the present invention is that a kind of low section mobile communication indoor covers paster antenna, be included in dielectric-slab and simultaneously go up metal patch and the little band transition line formation radiating element, the metal ground plate that are connected with metal patch, it is characterized in that: described metal ground plate is located at the another side of dielectric-slab, and be coupled by coaxial fitting and radiating element, be provided with the LC matching network between described little band transition line and the metal ground plate;
Described LC matching network is used to adjust travel frequency, obtains best mobile communication frequency scope.
Described little band transition line is that banded paster and metal patch junction to feed mouth are trapezoidal.
Banded paster of described little band transition line and metal patch junction to feed mouth are stairstepping.
Described coaxial fitting is located on the metal ground plate, and the outer conductor of coaxial fitting is connected with ground plate, and its inner wire is connected with the feed mouth of radiating element.In order to reduce the actual physics height of antenna, to be convenient to install, the present invention uses the back feed, and SMA (N shape or use coaxial line) connector is continuous.It is effective to make every effort to the antenna stealth.
Described metal patch is ellipse or similar round, and metal ground plate is trapezoidal or class is trapezoidal.
When described metal patch was oval paster, its oval transverse axis a was less than the trapezoidal width of going to the bottom of metal ground plate, and oval transverse axis a is 0.2-7 with the ratio of longitudinal axis b.
Described metal ground plate is class when trapezoidal, the 0.1-0.5 that its height H 1+H2 makes wavelength for farm labourer doubly, its go to the bottom width for 0.7-1.6 of its height doubly, the 0.1-0.5 that wavelength is made for casual labourer in the trapezoidal top of class is doubly.
Be provided with four tuning screws on the described dielectric-slab symmetrically, and play fixation.
Utilize the structure of monopole antenna and limited ground plane,, it be applied to microstrip antenna according to relevant wideband principle, thus realize to current use the public mobile communication frequency range (806MHz---2700MHz) carry out all standing.That is to say that the present invention is useful for conventional wireless communication systems.Ratio antenna in the past is littler, thinner.
A kind of low section mobile communication indoor covers paster antenna, owing to adopt said structure, compared with prior art, have the following advantages: (1) is in the ultra broadband characteristic that realizes micro-strip paster antenna, embodied the low section characteristic of microstrip antenna again, particularly satisfied 806--2700M mobile communication available frequency band under less than 1.4 situation in standing-wave ratio.(2) adopt and to be different from the traditional design thinking, design multifrequency, broadband, low section paster antenna simultaneously, need not to organize the paster antenna that battle array, single port feed need not complicated feed system, can realize multifrequency, broadband and low section.(3) on the basis of original monopole antenna theory, be successfully applied to the design of microstrip antenna, on the basis that guarantees the low section of microstrip antenna, two frequency ranges satisfy the requirement of 806MHz--2700MHz wireless communication system frequency range fully.This microstrip antenna is made simple, and operating cost is low, is easy to realize, can work in each frequency range of ALPURCOM, is fit to produce in batches.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments;
Fig. 1 a, Fig. 1 b are for the low section mobile communication indoor of the present invention covers the patch-antenna structure schematic diagram;
Fig. 2, Fig. 3 are standing-wave ratio curve chart of the present invention;
Fig. 4 is a low-frequency range directional diagram of the present invention;
Fig. 5 is a high band directional diagram of the present invention;
In Fig. 1,1, metal patch; 2, little band transition line; 3, metal ground plate; 4, dielectric-slab; 5, coaxial fitting; 7, LC matching network.
Embodiment
As shown in Figure 1, low section mobile communication indoor covers paster antenna, be included in dielectric-slab 4 one sides and go up metal patch 1 and the little band transition line 2 formation radiating elements that are connected with metal patch 1, constitute the unipole antenna metal master together with metal ground plate 3, described metal ground plate 3 is located at the another side of dielectric-slab 4, and is coupled by coaxial fitting 5 and radiating element.Described little band transition line 2 is banded paster, with metal patch 1 junction to feed mouth be trapezoidal.Described coaxial fitting 5 is located on the metal ground plate 3, and the outer conductor of coaxial fitting 5 is connected with metal ground plate 3, and its inner wire is connected with the feed mouth of radiating element.Antenna face is corroded into 50 ohm microstrip and is connected little band transition line and link to each other with similar round metal patch 1 (covering the copper part), is equivalent to monopole.Basic principle according to monopole antenna, utilize dielectric-slab 4 that radiating element and metal ground plate 3 are separated, adopt gradual change microstrip line 2 to be coupled, guarantee the needs of coupling and frequency range, by changing structure, bandwidth is moved on in the required mobile communication frequency range, thereby realize the wideband effect of indoor cover antenna, satisfy the requirement of the general frequency range of radio communication.
Be provided with LC matching network 7 between little band transition line 2 and the metal ground plate 3, one end of LC matching network 7 is connected with little band transition line 2, the other end passes dielectric-slab 4 and is connected with metal ground plate 3, add lumped parameter LC matching network 7 in little band transition line 2 welding and change the coupling resonance characteristic, frequency is better fallen in the mobile communication frequency range, by this matching network 7 positions and Parameter Optimization adjustment, make antenna of the present invention in whole mobile communication frequency range, obtain optimum standing wave and gain characteristic.
As Fig. 2, shown in Figure 3, than actual measurement data, as seen its standing-wave ratio is all below 1.4 at mobile communication frequency range standing internal wave for the embodiment of the invention.
As shown in Figure 4, present embodiment arrives the directional diagram that horizontal planes are spent in θ in the 1GHz frequency range=120 0.8
As shown in Figure 5, spend the directional diagram of horizontal planes for present embodiment θ=120 in 1.7GHz arrives the 2.5GHz frequency range.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (8)
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102597998A CN101964451A (en) | 2010-08-13 | 2010-08-13 | Low-section mobile communication indoor cover patch antenna |
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| CN2010102597998A CN101964451A (en) | 2010-08-13 | 2010-08-13 | Low-section mobile communication indoor cover patch antenna |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280702A (en) * | 2011-05-13 | 2011-12-14 | 上海大学 | Very broadband multiterminal feed printing one pole antenna |
| CN102299413A (en) * | 2011-06-02 | 2011-12-28 | 西北工业大学 | UHF (ultra high frequency) RFID (radio frequency identification) reader-writer antenna of smart shelf |
| CN104882676A (en) * | 2015-05-04 | 2015-09-02 | 南京信息工程大学 | Low-frequency ultra-wideband planar omnidirectional antenna |
| CN108767432A (en) * | 2018-05-25 | 2018-11-06 | 深圳市天鼎微波科技有限公司 | A kind of ultra wide band 5G antennas applied to handheld terminal |
| CN114709608A (en) * | 2022-04-13 | 2022-07-05 | 河北工业大学 | Novel ultra-wideband planar monopole antenna |
Citations (6)
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|---|---|---|---|---|
| US4827266A (en) * | 1985-02-26 | 1989-05-02 | Mitsubishi Denki Kabushiki Kaisha | Antenna with lumped reactive matching elements between radiator and groundplate |
| CN1369929A (en) * | 2001-02-13 | 2002-09-18 | 财团法人工业技术研究院 | Sheet antenna |
| CN201072805Y (en) * | 2007-03-13 | 2008-06-11 | 中兴通讯股份有限公司 | A dual-band broadband printed antenna |
| CN101278437A (en) * | 2005-09-29 | 2008-10-01 | 诺基亚公司 | dual resonant antenna |
| CN201285798Y (en) * | 2008-09-05 | 2009-08-05 | 上海杰盛通信工程有限公司 | Indoor coverage micro antenna |
| CN201789074U (en) * | 2010-08-13 | 2011-04-06 | 芜湖睿尔科技有限公司 | A Low Profile Mobile Communication Indoor Coverage Patch Antenna |
-
2010
- 2010-08-13 CN CN2010102597998A patent/CN101964451A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4827266A (en) * | 1985-02-26 | 1989-05-02 | Mitsubishi Denki Kabushiki Kaisha | Antenna with lumped reactive matching elements between radiator and groundplate |
| CN1369929A (en) * | 2001-02-13 | 2002-09-18 | 财团法人工业技术研究院 | Sheet antenna |
| CN101278437A (en) * | 2005-09-29 | 2008-10-01 | 诺基亚公司 | dual resonant antenna |
| CN201072805Y (en) * | 2007-03-13 | 2008-06-11 | 中兴通讯股份有限公司 | A dual-band broadband printed antenna |
| CN201285798Y (en) * | 2008-09-05 | 2009-08-05 | 上海杰盛通信工程有限公司 | Indoor coverage micro antenna |
| CN201789074U (en) * | 2010-08-13 | 2011-04-06 | 芜湖睿尔科技有限公司 | A Low Profile Mobile Communication Indoor Coverage Patch Antenna |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280702A (en) * | 2011-05-13 | 2011-12-14 | 上海大学 | Very broadband multiterminal feed printing one pole antenna |
| CN102299413A (en) * | 2011-06-02 | 2011-12-28 | 西北工业大学 | UHF (ultra high frequency) RFID (radio frequency identification) reader-writer antenna of smart shelf |
| CN104882676A (en) * | 2015-05-04 | 2015-09-02 | 南京信息工程大学 | Low-frequency ultra-wideband planar omnidirectional antenna |
| CN104882676B (en) * | 2015-05-04 | 2018-08-24 | 南京信息工程大学 | A kind of low-frequency ultra-wideband plane omnidirectional antenna |
| CN108767432A (en) * | 2018-05-25 | 2018-11-06 | 深圳市天鼎微波科技有限公司 | A kind of ultra wide band 5G antennas applied to handheld terminal |
| CN114709608A (en) * | 2022-04-13 | 2022-07-05 | 河北工业大学 | Novel ultra-wideband planar monopole antenna |
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Application publication date: 20110202 |