Transmit-receive sharing dual-polarization waveguide array antenna

Abstract

The invention discloses a transmit-receive sharing dual-polarization waveguide array antenna, which comprises a dual-polarization antenna unit and a waveguide feed network, wherein the dual-polarization antenna unit is composed of a radiation port, a main waveguide, a transition waveguide, a vertical polarization waveguide, a horizontal polarization waveguide and a polarization switching waveguide. A method of a horizontal polarization and a vertical polarization sharing the same one aperture is utilized, so that the aperture utilization efficiency of the antenna is increased. The horizontal polarization and the vertical polarization adopt a waveguide feed mode, so that the loss of the feed network is reduced, and the antenna has high antenna efficiency. Two polarizations to a radiation unit adopt the same polarization feed mode, wherein the vertical polarization is direct feed, the radiation to the horizontal polarization adopts the vertical polarization feed, and the horizontal polarization of the radiation is realized through a waveguide step transition and slot-coupling mode.

Description

technical field [0001] The technical field involved in the design of the present invention is not only in the communication field, but also has a considerable application background in electronic countermeasures, radar, remote sensing and the like. The invention is especially suitable for manufacturing low-profile satellite mobile communication, radar and dual-linear polarization array antennas in other systems, and is also especially suitable for dual-linear polarization one-dimensional or two-dimensional phased array antennas or linear polarization angle adjustable polarized array antenna. Background technique [0002] At present, the dual-linear polarized antennas or phased array antennas used in the communication system have the following forms. Although they have their own characteristics in performance, they all have certain deficiencies. [0003] 1. A dual-polarized antenna can be formed by using waveguide slot array antennas in two directions, but the two polarized ...

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Problems solved by technology

[0003] 1. A dual-polarized antenna can be formed by using waveguide slot array antennas in two directions, but the two polarized antennas cannot share the aperture, so the aperture utilization rate is low, and it cannot be used as a phased array antenna

[0004] 2. Use the waveguide wide-side slot antenna and the narrow-side slot antenna to realize the dual-polarized shared aperture, but after the integrated design of the two, the array spacing is at least the sum of the broad side and narrow side of the waveguide. If the array antenna is used, it cannot meet the requirements of the scanning range, so it cannot be used as a phased array antenna

[0005] 3. The shared aperture dual-linear polarized array antenna can be formed by using the microstrip array form, but due to the low efficiency of the microstrip antenna and the large loss of the microstrip feed network, its efficiency is low

[0006] 4. Use the narrow-side waveguide slot antenna and the narrow-side waveguide wall to form the horn antenna to realize the dual-polarized array antenna form. The efficiency of this array antenna is relatively low, the assembly is difficult, and the process is slightly cumbersome. It is used as a phased array antenna. , only the one-dimensional phase scanning function can be realized, and the two-dimensional scanning cannot be realized

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