阅读说明：本技术 一种兼容北斗、gps和数传功能的六频段复合天线 (Six-frequency-band composite antenna compatible with Beidou, GPS and data transmission functions ) 是由 陈素杰 金颖 王勇 马玉新 于 2020-03-17 设计创作，主要内容包括：本发明公开了一种兼容北斗、GPS和数传功能的六频段复合天线,包括底板、馈电网络板、B3频段贴片天线、L1/B1频段贴片天线、L频段贴片天线、S频段贴片天线、数传天线和馈电探针,该四个贴片天线按照工作频率由低到高、自下而上依次排列,形成共轴层叠结构；所述馈电网络固定在该共轴层叠结构的下端；该四个贴片天线分别通过馈电探针与馈电网络板连接,B3频段贴片天线、L1/B1频段贴片天线、L频段贴片天线及S频段贴片天线的中心共轴处均为金属化过孔；所述L1/B1频段贴片天线、L频段贴片天线的馈电网络的输入端均有开路支节匹配。本发明实现将数传频段天线复合到一个天线模块中,能够解决现有复合天线不能兼容数传频段的问题。(The invention discloses a six-frequency-band composite antenna compatible with Beidou, GPS and data transmission functions, which comprises a bottom plate, a feed network board, a B3 frequency-band patch antenna, an L1/B1 frequency-band patch antenna, an L frequency-band patch antenna, an S frequency-band patch antenna, a data transmission antenna and a feed probe, wherein the four patch antennas are sequentially arranged from bottom to top according to working frequency to form a coaxial laminated structure; the feed network is fixed at the lower end of the coaxial laminated structure; the four patch antennas are respectively connected with the feed network board through feed probes, and the coaxial centers of the B3 frequency band patch antenna, the L1/B1 frequency band patch antenna, the L frequency band patch antenna and the S frequency band patch antenna are all metallized through holes; and the input ends of the feed networks of the L1/B1 frequency band patch antenna and the L frequency band patch antenna are matched with each other through open circuit branch sections. The invention realizes the combination of the data transmission frequency band antenna into one antenna module, and can solve the problem that the existing composite antenna can not be compatible with the data transmission frequency band.)

1. The utility model provides a compatible big dipper, GPS and biography function's six frequency channels composite antenna which characterized in that: the antenna comprises a bottom plate, a feed network plate, a B3 frequency band patch antenna, an L1/B1 frequency band patch antenna, an L frequency band patch antenna, an S frequency band patch antenna, a data transmission antenna and a feed probe, wherein the B3 frequency band patch antenna, the L1/B1 frequency band patch antenna, the L frequency band patch antenna and the S frequency band patch antenna are sequentially arranged from bottom to top according to working frequency to form a coaxial laminated structure; the feed network is fixed at the lower end of the coaxial laminated structure; the B3 frequency band patch antenna, the L1/B1 frequency band patch antenna, the L frequency band patch antenna and the S frequency band patch antenna are respectively connected with the feed network board through feed probes, and the positions of the centers of the B3 frequency band patch antenna, the L1/B1 frequency band patch antenna, the L frequency band patch antenna and the S frequency band patch antenna, which are coaxial, are all metallized through holes; and the input ends of the feed networks of the L1/B1 frequency band patch antenna and the L frequency band patch antenna are matched with open circuit branch nodes and are used for adjusting the standing-wave ratio of the patch antenna.

2. The six-frequency-band composite antenna compatible with the Beidou, the GPS and the data transmission functions as claimed in claim 1, wherein: the B3 frequency band patch antenna adopts a microstrip structure, and a square patch with a radial strip line and a side length of L33 is printed on a substrate of the B3 frequency band patch antenna; the B3 frequency band patch antenna is provided with a first probe hole and a second probe hole for feeding a B3 frequency band patch, and double feeding is used for realizing circular polarization, the B3 frequency band patch antenna is provided with a third probe hole for feeding a B1/L1 frequency band patch, the B3 frequency band patch antenna is provided with a fourth probe hole for feeding an L frequency band patch, and the B3 frequency band patch antenna is provided with a fifth probe hole for feeding an S frequency band patch; and a metalized through hole is formed in the center of the B3 frequency band patch antenna.

3. The six-frequency-band composite antenna compatible with the Beidou, the GPS and the data transmission functions as claimed in claim 1, wherein: the B1/L1 frequency band patch antenna adopts a microstrip structure, and a square patch with a chamfer angle at the diagonal, a radial strip line and a side length of L44 is printed on a substrate of the B1/L1 frequency band patch antenna; a metalized through hole is formed in the center of the B1/L1 frequency band patch antenna; the B1/L1 frequency band patch antenna is provided with a metallized probe hole for improving the isolation between the L frequency band and the B1/L1 frequency band; the B1/L1 frequency band patch antenna is provided with a metallized probe hole.

4. The six-frequency-band composite antenna compatible with the Beidou, the GPS and the data transmission functions as claimed in claim 1, wherein: the L-band patch antenna adopts a microstrip structure, and a square patch with a chamfer angle at the opposite angle, a radial strip line and a side length of L54 is printed on a substrate of the L-band patch antenna; a metalized through hole is formed in the center of the L-band patch antenna; the L-frequency band patch antenna is provided with a metallized probe hole.

5. The six-frequency-band composite antenna compatible with the Beidou, the GPS and the data transmission functions as claimed in claim 1, wherein: the S-band patch antenna adopts a microstrip structure, and a square patch with a chamfer angle at the opposite angle, a radial strip line and a side length of L64 is printed on a substrate of the S-band patch antenna; and a metalized through hole is formed in the center of the S-band patch antenna.

6. The six-frequency-band composite antenna compatible with the Beidou, the GPS and the data transmission functions as claimed in claim 1, wherein: the six-frequency-band composite antenna adopts a dielectric substrate with a proper dielectric constant, so that the side lengths of the B3 frequency-band patch antenna, the L1/B1 frequency-band patch antenna, the L frequency-band patch antenna and the S frequency-band patch antenna meet L31, L41, L51 and L61; among the B3 frequency band patch antenna, the L1/B1 frequency band patch antenna, the L frequency band patch antenna and the S frequency band patch antenna, the antenna with low working frequency is also used as a reflecting plate of the antenna with high working frequency; and the central metallized through holes of the B3 frequency band patch antenna, the L1/B1 frequency band patch antenna, the L frequency band patch antenna and the S frequency band patch antenna are used for placing the data transmission antenna.

7. The six-frequency-band composite antenna compatible with the Beidou, the GPS and the data transmission functions as claimed in claim 1, wherein: the feed network board is of a strip line structure, four feed networks are printed on the feed network board, wherein the B3 feed network is realized through a 3dB electric bridge, and both the B1/L1 feed network and the L feed network are provided with open circuit branch nodes so as to adjust the voltage standing wave ratio of the frequency band; the metal parts except the four feed networks are in short circuit connection with the upper surface through a plurality of metallized through holes, and the input ends of the four feed networks are respectively connected with the corresponding coaxial sockets and are arranged on the bottom plate.

8. The six-frequency-band composite antenna compatible with the Beidou, the GPS and the data transmission functions as claimed in claim 1, wherein: the data transmission antenna consists of a copper stud and a copper spiral line, and the inductive copper spiral line is added to play a role in adding an inductive component so as to facilitate impedance matching of the data transmission antenna; the bottom end of the data transmission antenna is connected with the coaxial cable and is arranged on the bottom plate.

Technical Field

The invention belongs to the technical field of antennas, and relates to a six-frequency-band composite antenna compatible with Beidou, GPS and data transmission functions, which can be used for navigation communication equipment of a Beidou I frequency band, a Beidou II frequency band B3/B1 frequency band, a GPSL1 frequency band and a data transmission P frequency band.

Background

Currently, only a few countries in the world can independently develop and produce satellite navigation systems, and the countries mainly include the GPS in the United states, the GLONASS in Russia and the GALILEO in Europe. China independently develops a Beidou I and Beidou II satellite navigation system from 2003 in succession, wherein the L/S frequency band of the Beidou I has a transceiving function, and the B1/B3 frequency band of the Beidou II has a positioning and time service function. The main function of the data transmission radio station is to realize long-distance data transmission through an ultrashort wave radio system.

In wireless communication, an antenna is an important device for transmitting and receiving electromagnetic waves, in order to meet the higher-level requirements of a Beidou satellite navigation system, a Beidou I frequency band, a Beidou II frequency band B3/B1 frequency band and a GPSL1 frequency band need to be integrated into an antenna module, some multi-band composite antennas related to Beidou navigation are developed at home and abroad at present, but a data transmission frequency band is not integrated into the antenna module. Chinese patent No. CN201820682238 discloses a Beidou I and GPS multi-system compatible navigation antenna, and the compounding of three frequency bands of L1/L/S1 is realized by stacking microstrip printed boards; for another example, chinese patent No. CN 201410543032 discloses a five-band user equipment antenna compatible with the functions of beidou and GPS, which realizes the combination of five bands B3/B1/L1/L/S1 by stacking microstrip printed boards. However, the problem of isolation between the data transmission frequency band and the Beidou navigation frequency band cannot be solved because the data transmission frequency band antenna is not combined into one antenna module.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, provides a six-frequency-band composite antenna compatible with Beidou, GPS and data transmission functions, and aims to solve the problem that the existing composite antenna cannot be compatible with data transmission frequency bands.

In order to achieve the purpose, the invention adopts the technical scheme that:

a six-frequency-band composite antenna compatible with Beidou, GPS and data transmission functions comprises a bottom plate, a feed network board, a B3 frequency-band patch antenna, an L1/B1 frequency-band patch antenna, an L frequency-band patch antenna, an S frequency-band patch antenna, a data transmission antenna and a feed probe, wherein the B3 frequency-band patch antenna, the L1/B1 frequency-band patch antenna, the L frequency-band patch antenna and the S frequency-band patch antenna are sequentially arranged from bottom to top according to working frequency to form a coaxial laminated structure; the feed network is fixed at the lower end of the coaxial laminated structure; the B3 frequency band patch antenna, the L1/B1 frequency band patch antenna, the L frequency band patch antenna and the S frequency band patch antenna are respectively connected with the feed network board through feed probes, and the positions of the centers of the B3 frequency band patch antenna, the L1/B1 frequency band patch antenna, the L frequency band patch antenna and the S frequency band patch antenna, which are coaxial, are all metallized through holes; and the input ends of the feed networks of the L1/B1 frequency band patch antenna and the L frequency band patch antenna are matched with open circuit branch nodes and are used for adjusting the standing-wave ratio of the patch antenna.

Preferably, the B3 frequency band patch antenna adopts a microstrip structure, and a square patch with a radial strip line and a side length of L33 is printed on a substrate of the B3 frequency band patch antenna; the B3 frequency band patch antenna is provided with a first probe hole and a second probe hole for feeding a B3 frequency band patch, and double feeding is used for realizing circular polarization, the B3 frequency band patch antenna is provided with a third probe hole for feeding a B1/L1 frequency band patch, the B3 frequency band patch antenna is provided with a fourth probe hole for feeding an L frequency band patch, and the B3 frequency band patch antenna is provided with a fifth probe hole for feeding an S frequency band patch; and a metalized through hole is formed in the center of the B3 frequency band patch antenna.

Preferably, the B1/L1 frequency band patch antenna adopts a microstrip structure, and a square patch with a chamfer angle at the diagonal, a radial strip line and a side length of L44 is printed on a substrate of the B1/L1 frequency band patch antenna; a metalized through hole is formed in the center of the B1/L1 frequency band patch antenna; the B1/L1 frequency band patch antenna is provided with a metallized probe hole for improving the isolation between the L frequency band and the B1/L1 frequency band; the B1/L1 frequency band patch antenna is provided with a metallized probe hole.

Preferably, the L-band patch antenna adopts a microstrip structure, and a square patch having a chamfer angle, a radial strip line and a side length of L54 at a diagonal angle is printed on a substrate of the L-band patch antenna; a metalized through hole is formed in the center of the L-band patch antenna; the L-frequency band patch antenna is provided with a metallized probe hole.

Preferably, the S-band patch antenna adopts a microstrip structure, and a square patch having a chamfer angle, a radial strip line and a side length of L64 at a diagonal angle is printed on a substrate of the S-band patch antenna; and a metalized through hole is formed in the center of the S-band patch antenna.

Preferably, the six-frequency-band composite antenna is a dielectric substrate with a proper dielectric constant, so that the side lengths of patches of the B3 frequency-band patch antenna, the L1/B1 frequency-band patch antenna, the L frequency-band patch antenna and the S frequency-band patch antenna meet L31, L41, L51 and L61; among the B3 frequency band patch antenna, the L1/B1 frequency band patch antenna, the L frequency band patch antenna and the S frequency band patch antenna, the antenna with low working frequency is also used as a reflecting plate of the antenna with high working frequency; and the central metallized through holes of the B3 frequency band patch antenna, the L1/B1 frequency band patch antenna, the L frequency band patch antenna and the S frequency band patch antenna are used for placing the data transmission antenna.

Preferably, the feed network board adopts a strip line structure, four feed networks are printed on the feed network board, wherein the feed network B3 is realized by a 3dB electric bridge, and both the feed network B1/L1 and the feed network L are provided with open-circuit branch nodes so as to adjust the voltage standing wave ratio of the frequency band; the metal parts except the four feed networks are in short circuit connection with the upper surface through a plurality of metallized through holes, and the input ends of the four feed networks are respectively connected with the corresponding coaxial sockets and are arranged on the bottom plate.

Preferably, the data transmission antenna consists of a copper stud and a copper spiral line, and the inductive copper spiral line is added to play a role in adding an inductive component so as to facilitate impedance matching of the data transmission antenna; the bottom end of the data transmission antenna is connected with the coaxial cable and is arranged on the bottom plate.

Compared with the prior art, the invention has the following advantages:

1. according to the invention, the data transmission antenna is arranged at the coaxial center by adopting coaxial lamination of four patch antennas with different thicknesses and dielectric constants, so that the combination of the Beidou navigation frequency band and the data transmission frequency band is realized while the integral structure of the antenna is ensured to be compact.

2. The invention solves the problem of isolation between a data transmission frequency band and a Beidou navigation frequency band by adopting a cylindrical hollowed metallized via hole short circuit technology at the coaxial centers of four patch antennas.

3. The four patch antennas and the data transmission antenna are fused into one user machine antenna module, so that the antenna can be compatible with six antenna frequency bands, the compatibility of three polarization modes is realized, the receiving and transmitting work can be carried out simultaneously, and the application range of the antenna is effectively expanded.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural diagram of an S-band patch antenna according to the present invention;

fig. 3 is a schematic structural diagram of an L-band patch antenna according to the present invention;

FIG. 4 is a schematic structural diagram of a B1/L1 frequency band patch antenna according to the present invention;

fig. 5 is a schematic structural diagram of a B3 frequency band patch antenna according to the present invention;

fig. 6 is a schematic structural diagram of a feed network board according to the present invention.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

As shown in fig. 1-6, the six-band composite antenna compatible with the functions of big dipper, GPS and data transmission includes a bottom plate 1, a feed network board 2, a B3 band patch antenna 3, an L1/B1 band patch antenna 4, an L band patch antenna 5, an S band patch antenna 6, a data transmission antenna 7 and a feed probe, wherein the four patch antennas 3, 4, 5 and 6 are sequentially arranged from bottom to top according to the working frequency to form a coaxial stacked structure; the feed network 2 is fixed at the lower end of the coaxial laminated structure; the four patch antennas are respectively connected with the feed network board 2 through feed probes, and are characterized in that the coaxial centers of the four patch antennas are all metallized through holes; the input ends of the feed networks of the L1/B1 frequency band patch antenna 4 and the L frequency band patch antenna 5 are matched with open circuit branch nodes and used for adjusting the standing-wave ratio of the patch antenna.

Specifically, the B3 frequency band patch antenna 3 adopts a microstrip structure, and a substrate 31 of the B3 frequency band patch antenna is printed with a radial strip line 32 and a square patch 33 with the side length of L33; the B3 frequency band patch antenna is provided with a first probe hole 34 and a second probe hole 35 which feed the B3 frequency band patch, and the circular polarization is realized by using double feed, wherein the B1/L1 frequency band patch antenna is provided with a third probe hole 36, the L frequency band patch antenna is provided with a fourth probe hole 37, and the S frequency band patch antenna is provided with a fifth probe hole 38; the center of the B3 frequency band patch antenna is provided with a metalized through hole 39.

Specifically, the B1/L1 frequency band patch antenna 4 adopts a microstrip structure, and a square patch 44 with a chamfer 42 at the diagonal, a radial strip line 43 and a side length of L44 is printed on a substrate 41 of the B1/L1 frequency band patch antenna; a metalized through hole 45 is formed in the center of the B1/L1 frequency band patch antenna; the B1/L1 frequency band patch antenna is provided with a metallized probe hole 46 for improving the isolation between the L frequency band and the B1/L1 frequency band; the B1/L1 frequency band patch antenna is provided with a metallized probe hole 47.

Specifically, the L-band patch antenna 5 adopts a microstrip structure, and a square patch 54 having a chamfer 52 at a diagonal, a radial strip line 53 and a side length of L54 is printed on a substrate 51 of the L-band patch antenna; a metallized through hole 55 is formed in the center of the L-band patch antenna; the L-band patch antenna is provided with a metallized probe hole 56.

Specifically, the S-band patch antenna 6 has a microstrip structure, and a square patch 64 having a chamfer 62 at a diagonal, a radial strip line 63 and a side length of L64 is printed on a substrate 61 of the S-band patch antenna; the center of the S-band patch antenna is provided with a metallized via hole 65.

Specifically, the six-frequency-band composite antenna compatible with the Beidou, the GPS and the data transmission functions selects a dielectric substrate with a proper dielectric constant, so that the side length of the patches of the four patch antennas meets the requirements of L31, L41, L51 and L61; the antenna with low working frequency of the four patch antennas is also used as a reflecting plate of the antenna with high working frequency; the metallized via hole at the center of the four patch antennas is used for placing the data transmission antenna 7.

Specifically, the feed network board 2 adopts a strip line structure, four feed networks are printed on the feed network board 2, wherein the feed network 61 of B3 is realized by a 3dB electric bridge, and the feed network 62 of B1/L1 and the feed network 63 of L both have open-circuit stubs so as to adjust the voltage standing wave ratio of the frequency band; the metal parts except the four feed networks are in short circuit connection with the upper surface 66 through a plurality of metallized through holes 65, and the input ends of the four feed networks are respectively connected with the corresponding coaxial sockets and are arranged on the bottom plate 1; the feed probe is made of four copper materials with the diameter of 1mm and a 1.3mm coaxial cable, the five feed probes are arranged on a laminated structure consisting of the four patch antennas and the feed network board 2, and the upper end and the lower end of each feed probe are respectively connected with the corresponding patch and the corresponding feed network.

Specifically, the data transmission antenna 7 is composed of a copper stud 71 and a copper spiral line 72, and the inductive copper spiral line 72 is added to add an inductive component so as to facilitate impedance matching of the data transmission antenna; the bottom end of the data transmission antenna 7 is connected with a coaxial cable and is arranged on the bottom plate 1.

The Beidou navigation satellite system has the advantages that the design is reasonable, the structure is unique, the data transmission antenna is placed at the coaxial center by adopting the coaxial stacking of the four patch antennas with different thicknesses and dielectric constants, the integral structure of the antenna is compact, and the combination of the Beidou navigation frequency band and the data transmission frequency band is realized; the problem of isolation between a data transmission frequency band and a Beidou navigation frequency band is solved by adopting a cylindrical hollowed metallized via hole short circuit technology at the coaxial centers of four patch antennas; through fusing four patch antennas and data transmission antenna to a subscriber unit antenna module for six antenna frequency channels can be compatible to this antenna, three kinds of polarization mode's compatibility has been realized, and can receive and dispatch simultaneous working, its application range has effectually been expanded, realize compounding the data transmission frequency channel antenna to an antenna module in, the problem of the isolation between data transmission frequency channel and big dipper navigation frequency channel has been solved simultaneously, lay solid foundation for big dipper navigation system and data transmission radio networking.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.