RU2356139C1 - Multiwire wideband dipole antenna - Google Patents

Abstract

FIELD: physics, radio.

SUBSTANCE: invention is related to antenna engineering, namely to multiwire wideband dipole antennas, and may be used as combined antenna of mobile short-wave radio stations of low and medium capacity. Technical result is achieved by the fact that in multiwire wideband dipole antenna comprising mast, two symmetrical arms, every of which consists of more than two conductors separating in direction from mast, every arm of dipole antenna comprises connection device having mechanical connection on one side with upper part of mast, electrical connection with feeder line through matching transformer, and on the other side - electric connection to conductors, devices for conductors fixation with brace, connection conductor installed on brace and electrically connecting ends of conductors.

EFFECT: increased reliability, simplification of design and increase of frequency range.

14 cl, 4 dwg

Description

The invention relates to antenna technology, namely to multi-conductor broadband dipole antennas. The claimed device can be used as a transceiver antenna of mobile KB radio stations of small and medium power.

A known dual-band dipole antenna containing two symmetrical wire arms, characterized in that, in order to increase the efficiency, additional wire segments are included symmetrically with respect to its longitudinal axis in each wire arm, the length of the wire arms from the outer end to the point of inclusion additional segments of conductors is 0.5n · λ _sr , the length of the portion of the wire arm from the axis of symmetry of the dual-band antenna to the point of inclusion of additional segments of the conductor s is 0.25λ _sr , and the length of each of the additional lengths of conductors is 0.5λ _sr , where λ _sr is the average wavelength of the high-frequency subband; n = 1, 2, 3 ..., and each wire arm is made in the form of two conductors diverging from the center of the antenna, additional wire segments are connected to each of the wire arm conductors parallel to the longitudinal axis of the dual-band antenna (RF patent No. 1040996 from IPC H01Q 9/34, 01/27/1999).

A disadvantage of the known antenna is that it operates in two subbands: 3-7 MHz, 20-30 MHz, and cannot cover the entire KB range.

The dual-band dipole antenna according to the patent of the Russian Federation No. 1040996 is taken as a prototype.

The aim of the invention is to create a simple, reliable antenna containing a minimum number of parts, increasing the frequency range of the antenna without peaks and dips, to completely cover the KB range of 3-30 MHz with an SWR of less than 2.0.

The technical result is achieved in that a multi-conductor broadband dipole antenna containing the mast, two symmetrical arms, each of which consists of more than two conductors diverging in the direction from the mast, is characterized in that each of the arms of the dipole antenna contains a connecting device having on one side mechanical connection to the top of the mast, electrical connection to the feeder line through a matching transformer, and on the other hand, electrical connection to conductors, devices and attaching conductors to stretching, the connecting conductor mounted on stretching, electrically connecting ends of conductors.

The drawings show:

figure 1 is a General view of a multi-conductor broadband dipole antenna;

figure 2 - mounting device of the conductor with a banner and a device for electrical connection of the conductor with a connecting conductor mounted on a banner;

figure 3 - connecting device, mechanically connected to the mast and electrically connected to the feeder line and conductors;

figure 4 is a graph of the SWR of a multi-wire broadband dipole antenna.

In the provided drawings, a multi-conductor broadband dipole antenna comprises a mast 1, an antenna base 2 secured by mast poles 3, mast extensions 4, a connecting device 5, electrical connections 6, mast carabiners 7, conductors 8, stakes 9 of extensions 10, carabiners 11, connecting conductors 12 mounted on extensions 10, terminal (plug) connectors 13, loops 14 of extensions 10, conductors 8, indicated by letters a, a, b, b, c, c, are pairs of identical conductors that differ in length from each other.

The claimed invention is an effective highly mobile multi-conductor broadband dipole antenna, which is easily and quickly installed, has a small weight, a minimum of parts.

Antenna base 2 - figure 1 - is installed in a horizontal position and is attached by mast poles 3, a mast 1 is installed and fixed in the center of the antenna base, which is fixed in a vertical position by mast extensions 4. To the upper part of mast 1 are attached two vertices through mast carabiners 7 devices 5 made in the form of triangles, which are also connected to the feeder line through electrical connections 6 and a matching transformer. The bases of the connecting devices 5 are electrically connected to the conductors 8.

In Fig. 1, each symmetrical arm of a multiconductor broadband dipole antenna contains an even number of conductors 8 in three pairs, located in a mirror fashion, where each pair of identical conductors 8 differs in length from another pair of identical conductors 8. The device for mechanical fastening of conductors 8 with a brace 10 contains carabiners 11 moreover, the extensions 10 are made of dielectric material and have loops 14 for mechanically securing each conductor 8 by means of a carabiner 11. On each extension 10, it is perpendicular to In the mast 1, a connecting conductor 12 is installed, which is electrically connected to each conductor 8 through a terminal or plug connector 13. The connecting conductor 8 is attached to the extension 10 by a bandage.

In other embodiments of the construction of a multi-conductor broadband dipole antenna, each symmetrical arm may contain an odd number of conductors 8, and the conductors 8 may vary in length from each other.

The tests showed that the multi-conductor broadband dipole antenna has a gain of 2-3 decibels and covers the range of 3-30 MHz with an SWR of less than 2.0 - Fig. 4, and the antenna design has excellent repeatability of electrical parameters in the manufacture of other antenna samples. A distinctive feature of the antenna design is that the antenna sheet of each symmetrical arm is held by a single extension, while the extension also serves as a supporting structure for the connecting conductor, and the entire multi-conductor broadband dipole antenna can withstand wind loads at a wind speed of more than 200 km / h. The antenna is reliable and easy to manufacture.

Claims (14)

1. A multi-conductor broadband dipole antenna containing a mast, two symmetrical arms, each of which consists of more than two conductors diverging in the direction from the mast, characterized in that each of the arms of the dipole antenna contains a connecting device having on one side a mechanical connection with the top of the mast, the electrical connection to the feeder line through a matching transformer, and on the other hand, the electrical connection to the conductors, devices for attaching conductors with a stretch, with edinitelny conductor mounted on stretching, electrically connecting ends of conductors. 2. The multi-conductor broadband dipole antenna according to claim 1, characterized in that the connecting conductor is installed on a stretch perpendicular to the mast. 3. The multi-conductor broadband dipole antenna according to claim 1, characterized in that the device for attaching a conductor with a brace includes a carabiner. 4. The multi-conductor broadband dipole antenna according to claim 1, characterized in that the extension is made of dielectric material and has loops for mechanically securing each conductor with a carabiner. 5. The multi-conductor broadband dipole antenna according to claim 1, characterized in that the connecting conductor is electrically connected to each conductor through a terminal connector. 6. The multi-conductor broadband dipole antenna according to claim 1, characterized in that the connecting conductor is electrically connected to each conductor through a plug connector. 7. The multi-conductor broadband dipole antenna according to claim 1, characterized in that the connecting devices are made in the form of triangles. 8. The multi-conductor broadband dipole antenna according to claim 1, characterized in that it contains mast extensions. 9. The multi-conductor broadband dipole antenna according to claim 1, characterized in that the conductors differ in length from each other. 10. The multi-conductor broadband dipole antenna according to claim 1, characterized in that each symmetrical arm contains an even number of conductors. 11. The multi-conductor broadband dipole antenna according to claim 1, characterized in that each symmetrical arm contains a pair of identical conductors that differ in length from another pair of identical conductors. 12. The multi-conductor broadband dipole antenna according to claim 1, characterized in that each symmetrical arm contains an odd number of conductors. 13. The multi-conductor broadband dipole antenna according to claim 1, characterized in that the connecting devices are attached with their peaks to the top of the mast through the mast carabiners. 14. The multi-conductor broadband dipole antenna according to claim 1, characterized in that it contains an antenna base.

Images