CN112086755A

CN112086755A - Horn antenna array element of double circular polarization, wide wave beam and high polarization purity medium

Info

Publication number: CN112086755A
Application number: CN202010267402.3A
Authority: CN
Inventors: 林叶嵩; 李明; 贺群
Original assignee: Shanghai Jingji Communication Technology Co ltd
Current assignee: Shanghai Jingji Communication Technology Co ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2020-12-15

Abstract

The invention relates to the field of satellite data transmission, in particular to a high-speed data transmission phased array antenna of a commercial satellite. A horn antenna array element with double circular polarization, wide wave beam and high polarization purity medium comprises: the device comprises an SMP connector, a metal partition plate, a coupling probe, a rectangular waveguide, a phase shifter, a square waveguide, a circular waveguide and polyimide, wherein the metal partition plate divides the square waveguide into two rectangular waveguides; the two SMP joints are respectively arranged in the two rectangular waveguides, each SMP joint is connected with a coupling probe, the tail end of each coupling probe is bent to 90 degrees, and then the coupling probes are welded to the side edges of the rectangular waveguides where the SMP joints are connected; the phase shifter is a step-shaped metal partition plate arranged in the rectangular waveguide, the metal partition plate and the phase shifter are provided with corresponding steps, the upper part of the rectangular waveguide is provided with a circular waveguide, and electromagnetic waves are transferred to the circular waveguide through the rectangular waveguide after being subjected to phase shifting to realize rectangular-circular waveguide conversion; the polyimide is filled in the waveguide to reduce the caliber of the waveguide, so that the beam width is widened.

Description

Horn antenna array element of double circular polarization, wide wave beam and high polarization purity medium

Technical Field

The invention relates to the field of satellite data transmission, in particular to a high-speed data transmission phased array antenna of a commercial satellite.

Background

The traditional X-frequency band data transmission phased array antenna array element mainly comprises: microstrip antennas, single circularly polarized dielectric horn antennas, and the like. The microstrip antenna has small volume and light weight, but has narrower bandwidth and poorer axial ratio performance, and is difficult to realize polarization multiplexing; the single circular polarization dielectric horn antenna has excellent beam width and axial ratio performance, but can only realize single circular polarization, and the polarization multiplexing can be realized only by designing two phased array antennas with different circular polarizations to work simultaneously. This not only increases the cost, but also increases the volume and weight of the antenna, occupying the limited loading space and load of the rocket.

Disclosure of Invention

The present invention is directed to solve the above problems of the prior art, and to provide a horn antenna array element with dual circular polarization, wide beam, and high polarization purity media. The invention can be used for a commercial satellite high-speed X-waveband data transmission phased array antenna, can realize double circular polarization performance on the premise of not increasing the volume and the weight, and has excellent axial ratio performance, wide beam coverage range and wide working bandwidth.

The invention relates to a horn antenna array element of a double-circular-polarization, wide-beam and high-polarization purity medium, which comprises: the device comprises an SMP connector, a metal partition plate, a coupling probe, a rectangular waveguide, a phase shifter, a square waveguide, a circular waveguide and polyimide, wherein the metal partition plate divides the square waveguide into two rectangular waveguides; the two SMP joints are respectively arranged in the two rectangular waveguides, each SMP joint is connected with a coupling probe, the tail end of each coupling probe is bent to 90 degrees, and then the coupling probes are welded to the side edges of the rectangular waveguides where the SMP joints are connected; the phase shifter is a step-shaped metal partition plate arranged in the rectangular waveguide, the metal partition plate and the phase shifter are provided with corresponding steps, the upper part of the rectangular waveguide is provided with a circular waveguide, and electromagnetic waves are transferred to the circular waveguide through the rectangular waveguide after being subjected to phase shifting to realize rectangular-circular waveguide conversion; the polyimide is filled in the waveguide to reduce the caliber of the waveguide, so that the beam width is widened.

Each SMP connector corresponds to a circular polarization interface.

The horn antenna array element is a medium with double circular polarization, wide wave beam and high polarization purity, and a groove is formed in the waist of the antenna array element.

The dual-circular polarization performance can be realized on a single data transmission phased array antenna, the polarization multiplexing can be realized only by one data transmission phased array antenna, and the data transmission rate is improved. The invention can be used for a commercial satellite high-speed X-waveband data transmission phased array antenna and can realize double circular polarization performance on the premise of not increasing the volume and the weight. The invention has the advantages of excellent axial ratio performance, wide beam coverage range and wide working bandwidth.

Drawings

Fig. 1 is a schematic structural view of the present invention.

FIG. 2a is a front view, in cross-section, of the present invention;

FIG. 2b is a side view in elevation of the push diagram of the present invention;

fig. 3 is a diagram showing simulation results of a left-hand polarization pattern.

Fig. 4 is a graph of the results of simulation of the left-hand polarization axial ratio.

FIG. 5 is a graph of results of a left hand port standing wave simulation.

Fig. 6 is a diagram of a right-hand polarization pattern simulation result.

Fig. 7 is a graph of the results of right-hand polarization axis ratio simulation.

FIG. 8 is a graph of results of a simulation of a right-hand port standing wave.

The specific implementation mode is as follows:

the following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1, 2a and 2b, the present invention includes: the device comprises an SMP connector 1, a metal partition plate 2, a coupling probe 3, a rectangular waveguide 4, a phase shifter 5, a square waveguide 6, a circular waveguide 7 and polyimide 8. The metal partition plate divides the square waveguide into two rectangular waveguides; the two SMP joints are respectively arranged in the two rectangular waveguides, each SMP joint is connected with a coupling probe, the tail end of each coupling probe is bent to 90 degrees, and then the coupling probes are welded to the side edges of the rectangular waveguides where the SMP joints are connected; the phase shifter is a step-shaped metal partition plate arranged in the rectangular waveguide, the metal partition plate and the phase shifter are provided with corresponding steps, the upper part of the rectangular waveguide is provided with a circular waveguide, and electromagnetic waves are transferred to the circular waveguide through the rectangular waveguide after being subjected to phase shifting to realize rectangular-circular waveguide conversion; the polyimide is filled in the waveguide to reduce the caliber of the waveguide, so that the beam width is widened.

Each SMP connector corresponds to a circular polarization interface.

Examples

The two SMP connectors 1 are directly arranged at the central positions of the bottoms of the two rectangular waveguides, and the distance P between the two SMP connectors 1 is 6.3 mm; the thickness K of the metal separator 2 is 0.4mm, and the height E5 is 12 mm; the diameter M1 of coupling probe 3 is 1mm, the height J of the probe is 7.3 mm; the phase shifter 5 is a step-shaped partition board, the size E4 from the lowest step to the bottom of the antenna is 17.4, the size G4 from the center line of the antenna is 1.4, the size E3 from the middle step to the bottom of the antenna is 22.8, the size G3 from the center line of the antenna is 0.6, the size E3 from the highest step to the bottom of the antenna is 28.2, and the size G3 from the center line of the antenna is 4.3; the caliber H1 of the square waveguide 6 is 12.2 mm-H2 mm; the diameter D2 of the circular waveguide 7 is 18 mm. The diameter D1 of whole antenna is 19mm, and height A1 is 44mm, and antenna cavity depth N is 42 mm.

Through a large number of simulation and processing tests, the results are shown in fig. 3 to 8, and it can be seen that the antenna of the embodiment can fully cover the frequency range of 8000-8400 MHz, the gain is higher than 0dB in the angular domain range of-60 degrees to +60 degrees, and the axial ratio is less than 1.5 dB. The following table shows the main technical indicators of the invention.

TABLE 1 technical indices

Serial number	Index name	Design value
				1	Operating frequency band	8GHz～8.4GHz
2	Gain of	≥0dB
			3	Beam coverage	Azimuth angle 360 degrees and pitch angle 60 degrees
4	Polarization mode	Dual circular polarization
			5	Axial ratio	≤1.6dB
6	Standing wave	≤1.3

。

Claims

1. Horn antenna array element of double circular polarization, wide wave beam, high polarization purity medium, its characterized in that, it includes: the device comprises an SMP connector (1), a metal partition plate (2), a coupling probe (3), a rectangular waveguide (4), a phase shifter (5), a square waveguide (6), a circular waveguide (7) and polyimide (8), wherein the metal partition plate (2) divides the square waveguide (6) into two rectangular waveguides (4); the two SMP joints (1) are respectively arranged in the two rectangular waveguides, each SMP joint is connected with a coupling probe (3), the tail end of each coupling probe is bent to 90 degrees and then welded to the side edge of the rectangular waveguide (4) where the SMP joints connected with the coupling probe are located; the phase shifter (5) is a step-shaped metal partition plate arranged in the rectangular waveguide, the metal partition plate and the phase shifter are provided with corresponding steps, the upper part of the rectangular waveguide is provided with a circular waveguide, and electromagnetic waves are transferred to the circular waveguide (7) through the rectangular waveguide (4) after being subjected to phase shifting to realize rectangular-circular waveguide conversion; the waveguide aperture is reduced by filling polyimide (8) inside, and the beam width is widened.

2. The dual circular polarization, wide beam, high polarization purity dielectric feedhorn element of claim 1, wherein: each SMP connector (1) corresponds to a circularly polarized interface.

3. The dual circular polarization, wide beam, high polarization purity dielectric feedhorn element of claim 1, wherein: the waist of the antenna array element is provided with a groove.