Dual-frequency dual-circular-polarization folding reflective array antenna
A reflectarray antenna and dual circular polarization technology, which is applied to antennas, antenna arrays, and devices that enable antennas to work in different bands at the same time, can solve the problems of complex antenna structures and increased processing costs, so as to ensure radiation characteristics and reduce Processing cost, the effect of broadening the scope of functions
Pending Publication Date: 2022-02-18
XI'AN PETROLEUM UNIVERSITY
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Problems solved by technology
The disadvantage of this invention is that: circularly polarized radiation is realized by adding a polarization converter in front of the radiation aperture, which makes the structure of the antenna more complicated and increases the processing cost; at the same time, the antenna can only realize single-frequency single-circularly polarized radiation , to realize the uplink and downlink communication in the satellite communication system, two folded reflectarray antennas must be equipped
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[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0033] refer to figure 1 , the present invention includes a main reflector 1 and a secondary transmission mirror 3 fixed at the half focal length position of the main reflector 1 by a support structure 2 of non-metallic material; the central normal of the main reflector 1 and the secondary transmission mirror 3 coincidence; the hollow position of the center of the main reflector 1 is fixed with a feed source 4, and the phase center of the feed source 4 coincides with the center position of the main reflector 1; the feed source 4 adopts a rectangular horn antenna structure.
[0034] refer to figure 2 , the main reflector 1 includes a square first dielectric substrate 11 hollowed out in the center; the first dielectric substrate 11 adopts a dielectric substrate with an aperture size of 156mm×156mm, a thickness of 3mm, and a dielectric constant of...
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Abstract
The invention provides a dual-frequency dual-circularly-polarized folded reflective array antenna, and aims to simplify the antenna structure and broaden the functional range of the circularly-polarized folded reflective array antenna while ensuring the radiation characteristics of the circularly-polarized folded reflective array antenna. The antenna comprises a main reflector, an auxiliary reflector, a support structure and a feed source; the main reflector comprises a first dielectric substrate with a hollow center, the upper surface of the dielectric substrate is printed with periodically arranged square ring-shaped metal patches for realizing linear polarization conversion and conversion from spherical waves to plane waves, and the lower surface of the dielectric substrate is printed with a metal floor; the secondary transmitting mirror comprises a second dielectric substrate and a third dielectric substrate which are stacked up and down, the lower surface of the second dielectric substrate is printed with a metal floor with a leaky wave slot, and the upper surface of the second dielectric substrate and the lower surface of the third dielectric substrate are both printed with two circular metal patches of different specifications; and through the connection of a metalized via hole passing through the leaky-wave gap, the dual-frequency dual-circularly-polarized radiation characteristic is realized.
Description
technical field [0001] The invention belongs to the technical field of antennas, and relates to a folded reflection array antenna, in particular to a dual-frequency double circular polarization folded reflection array antenna, which can be used in the field of wireless satellite communication. [0002] technical background [0003] The uplink signal and downlink signal in wireless satellite communication generally adopt the same path, if a pair of antennas with the same frequency band and the same polarization are used as the transmitting and receiving antennas, signal interference will inevitably occur. Therefore, in wireless satellite communication, two antennas with different frequency bands and different polarizations are usually selected as the transmitting and receiving antennas. In addition, compared with linearly polarized antennas, circularly polarized antennas have more advantages in wireless satellite communication systems due to their advantages of minimizing pola...
Claims
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IPC IPC(8): H01Q21/00H01Q1/38H01Q5/20H01Q15/14H01Q15/24
CPCH01Q21/00H01Q15/14H01Q1/38H01Q15/242H01Q5/20
Inventor 杨佩秦宏伟党瑞荣李利品党博
Owner XI'AN PETROLEUM UNIVERSITY
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