CN105490028A - Antenna and platform telemetering system - Google Patents

Abstract

The invention discloses an antenna, which comprises: a metal choke coil, the metal choke coil is a multi-layer metal concentric circular cavity structure with a closed bottom surface; a radio frequency connector, the radio frequency connector is installed on the metal The bottom surface of the inner cavity of the choke coil; the feed network and the radiation patch, the feed network and the radiation patch are fixed on the top of the inner cavity from bottom to top. The invention also discloses a platform telemetry system with the above-mentioned antenna. The invention has superior performance, simple and reliable structure and process, wide gain bandwidth and high isolation, and can realize left-handed and right-handed circularly polarized radiation at the same time, with a small back lobe of the radiation pattern and excellent axial ratio performance. Antenna performance is easy to adjust.

Description

An antenna and platform telemetry system

technical field

The invention relates to the technical field of antennas, in particular to the technical field of antennas with wide frequency band, dual circular polarization, low rear lobe, and shared transmission and reception, and is suitable for telemetry systems with miniaturized, light weight, and complex structure platforms.

Background technique

Existing low-lobe antennas generally use metamaterial-based structural models, such as the patent "antenna reflector and low-lobe antenna" (application number: CN201320717530.9), and the patent "providing a reduced back-lobe Fresnel area Microstrip antenna" (application number: CN201210425430.9), the metamaterial structure of this type of antenna leads to low radiation efficiency of the antenna, and the formed high-resistance bandwidth is narrow, which is not suitable for the requirement of reducing the back lobe of the broadband antenna; at the same time, The high-resistance structure formed in the form of a microstrip causes inconvenient installation of the antenna and weak structural strength, and is not suitable for installation on complex carrier platforms.

In order to meet the bandwidth requirements of the antenna, dielectric loading is commonly used, such as the patent "Dielectric Loading Broadband Miniaturized Dual Circular Polarization Antenna" (application number: CN201210580457.5), and slot coupling forms, such as the patent "based on coupled microstrip line coupling Compact Broadband Dual Circularly Polarized Patch Antenna" (Application No.: CN201310120397.3), Patent "A Circularly Polarized Ceramic Antenna Based on Stripline Multi-Slot Coupling Feeding" (Application No.: CN201010283707.X) , this type of antenna has a large size, complex structure, and large rear lobe, and is also not suitable for installation on complex platforms and to ensure stable electrical performance.

In the way of realizing circular polarization, it is necessary to form excitations that are orthogonal in space and time and equal in amplitude on the radiation surface of the antenna, such as the patent "Dielectric Loaded Broadband Miniaturized Dual Circular Polarization Antenna" (application number: CN201210580457.5) , using a diaphragm circular polarizer to form circular polarization, such as the patent "A dual circularly polarized broadband antenna radiating unit for wide-angle scanning phased array" (application number: CN201010129681.3), using a circularly polarized film The slices are circularly polarized. The main defects of the above-mentioned methods are that the structure is complicated, it is not easy to adjust, and the requirements for processing precision are relatively high.

Contents of the invention

The technical solution problem of the present invention is: to overcome the deficiencies of the prior art, to provide a device that overcomes the influence of the complex structural platform, has simultaneous left-handed and right-handed circular polarization radiation performance, wide-band gain coverage, high isolation, compact structure, and small size. , light weight, easy to install, meet the requirements of telemetry and remote control, and the antenna performance is easy to adjust.

In order to achieve the above object, the present invention provides an antenna, including: a metal choke, the metal choke is a multi-layer metal concentric circular cavity structure with a closed bottom surface; a radio frequency connector, the radio frequency connector is installed on the metal choke The bottom surface of the inner cavity; the feed network and the radiation patch, the feed network and the radiation patch are fixed on the top of the inner cavity from bottom to top.

Further, the radio frequency sensor, the feeding network, the radiation patch and the inner cavity are all fixed by screws.

Furthermore, the front side of the feed network adopts an orthogonal H-shaped slot structure, and the reverse side adopts a directional coupler structure as a power divider.

Furthermore, the output ports of the orthogonal H-shaped slot structure and the directional coupler structure have equal amplitudes and a 90-degree phase difference.

Furthermore, the radiation patch takes the form of a microstrip dielectric substrate.

Furthermore, the multi-layer metal concentric circular cavity structure is a three-layer metal concentric circular cavity structure.

Furthermore, the three-layer metal concentric circular cavity structure is a three-layer copper concentric circular cavity structure.

Through the above technical solution, the broadband dual circular polarization low back lobe transceiver antenna effectively reduces the antenna back lobe, significantly improves the electrical performance of the antenna radiation on the complex structure platform; can effectively improve the frequency coverage; can realize left-handed and right-handed Circular polarization radiation, with the characteristics of dual circular polarization transceiver integrated work; simple structure, easy to install, and good stability.

Based on the same inventive concept, the present invention also provides a platform telemetry system, including: the above broadband dual circular polarization low back lobe integrated transceiver antenna; a control device for receiving the broadband dual circular polarization low back lobe integrated transceiver antenna The signal transmitted by the intelligent antenna is processed and the corresponding control signal is sent out.

Further, the control device is a programmable logic controller (PLC).

Other features and advantages of the present invention will be described in detail in the following detailed description.

Description of drawings

1 is a schematic diagram of the overall structure of the antenna of the present invention;

Fig. 2 is a schematic diagram of the radiation pattern of the present invention;

Fig. 3 is a schematic diagram of standing waves of the present invention.

Explanation of reference signs

1 Metal choke coil 2 RF connector coil 3 Feed network

4 radiation patches 5 screws 6 lumen

detailed description

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

In the present invention, unless stated otherwise, the used orientation words such as "inner and outer" generally refer to the inner and outer sides of the corresponding object outline. The used orientation words such as "up, down, left, right, front and back" usually refer to the up, down, left, right and front and back of the corresponding object.

As shown in Figure 1, the broadband dual circular polarization low rear lobe integrated transceiver antenna provided by the present invention includes: a metal choke coil 1, which is a multi-layer metal concentric circular cavity structure with a closed bottom surface; The connector 2 and the radio frequency connector 2 are installed on the bottom surface of the inner cavity 6 of the metal choke coil 1; the feeding network 3 and the radiation patch 4 are fixed on the inner cavity 6 from bottom to top top.

In this embodiment, the radio frequency connector 2 is installed on the bottom surface of the inner cavity 6 of the metal choke coil 1 , and the feed network 3 and the radiation patch 4 are fixed on the top of the inner cavity of the metal choke coil 1 from bottom to top. The metal choke coil 1 is a multi-layer concentric circular cavity structure. Since a high-resistance structure is formed on the surface of the antenna, it can effectively improve the roll-off ratio of the pattern, reduce the rear lobe of the antenna, and improve the radiation performance of the antenna on a complex structure platform.

Preferably, in order to facilitate replacement when the radio frequency sensor, the feed network and the radiation patch fail, the radio frequency sensor, the feed network, the radiation patch and the inner cavity are all fixed by screws, which can facilitate installation and disassembly.

More preferably, in order to effectively improve the frequency coverage, the front side of the feed network adopts an orthogonal H-shaped slot structure, and the reverse side adopts a directional coupler structure as a power divider. Compared with the traditional one-point self-circular polarization and two-point, three-point, and four-point feed circular polarization, the orthogonal H-shaped slot feed structure and the radiation patch form two resonant structures, which can effectively improve the frequency coverage. The opposite side of the feed network uses a directional coupler as a power divider, and the left-handed and right-handed circularly polarized radiation can be realized simultaneously by exciting the two ports separately.

More preferably, in order to effectively improve the frequency coverage, the output ports of the orthogonal H-shaped slot structure and the directional coupler structure have equal amplitudes and a 90-degree phase difference.

More preferably, in order to better couple and feed with the orthogonal H-shaped slot, the radiation patch is in the form of a microstrip dielectric substrate.

More preferably, in order to make the performance of the antenna more excellent, the multi-layer metal concentric circular cavity structure is a three-layer metal concentric circular cavity structure.

More preferably, in order to make the performance of the antenna more excellent, the three-layer metal concentric circular cavity structure is a three-layer copper concentric circular cavity structure.

In Figure 2, the back lobe of the radiation pattern is small, and the front-to-back ratio is close to 26dB, which is better than the common circularly polarized wide-beam antenna;

In Figure 3, the standing wave bandwidth (VSWR≤2) of the antenna is close to 18%. Compared with the traditional microstrip antenna, the frequency band broadening effect is remarkable.

Through the above technical solution, the broadband dual circular polarization low back lobe transceiver antenna effectively reduces the antenna back lobe, significantly improves the electrical performance of the antenna radiation on the complex structure platform; can effectively improve the frequency coverage; can realize left-handed and right-handed Circular polarization radiation, with the characteristics of dual circular polarization transceiver integrated work; simple structure, easy to install, and good stability.

Based on the same inventive concept, the present invention also provides a platform telemetry system, including: the above broadband dual circular polarization low back lobe integrated transceiver antenna; a control device for receiving the broadband dual circular polarization low back lobe integrated transceiver antenna The signal transmitted by the intelligent antenna is processed and the corresponding control signal is sent out.

Preferably, the control device is a programmable logic controller (PLC).

In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way if there is no contradiction. In order to avoid unnecessary repetition, various other possible features of the present invention The combination method will not be described separately.

In addition, various combinations of different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (9)

1. an antenna, is characterized in that, comprising:

Metal choke (1), the multiple layer metal circular concentric cavity configuration that described metal choke (1) is closed for bottom surface;

Radio frequency connector (2), described radio frequency connector (2) is arranged on the bottom surface of the inner chamber (6) of described metal choke (1);

Feeding network (3) and radiation patch (4), described feeding network (3) and described radiation patch (4) are fixed on the top of described inner chamber (6) from bottom to up.

2. antenna as claimed in claim 1, it is characterized in that, described radio frequency sensor (2), described feeding network (3) and described radiation patch (4) and described inner chamber (6) are all fixed by screw (5).

3. antenna as claimed in claim 2, it is characterized in that, the front of described feeding network (3) adopts orthogonal H groove part gap structure, and reverse side adopts directional coupling structure as power splitter.

4. antenna according to claim 4, is characterized in that, the equal and phase 90 degree of the output port amplitude of described orthogonal H-shaped gap structure and described directional coupling structure.

5. antenna according to claim 1, it is characterized in that, described radiation patch (4) adopts the form of micro-band dielectric substrate.

6. antenna according to claim 1, it is characterized in that, described multiple layer metal circular concentric cavity configuration is three-layer metal circular concentric cavity configuration.

7. antenna according to claim 6, it is characterized in that, described three-layer metal circular concentric cavity configuration is three layers of copper circular concentric cavity configuration.

8. a platform telemetry system, is characterized in that, comprising:

Antenna as described in any one of claim 1-7;

Control appliance, for receiving the signal of described antenna transmission, sends corresponding control signal after processing.

9. platform telemetry system according to claim 8, described control appliance is can logical editting control machine (PLC).