A flat-panel antenna array in the ka frequency band

Abstract

The panel antenna array of a kind of Ka frequency band of the present invention comprises: the waveguide power distribution network of the first layer, the waveguide power distribution network of the second layer, horn radiator: wherein the waveguide power distribution network of the first layer and the waveguide power distribution network of the second layer are composed of multiple A waveguide E-plane T-shaped structure is cascaded; the number of horn radiators corresponds to the number of waveguide E-plane T-shaped structures; each waveguide E-plane T-shaped structure has two output terminals, and the horn radiator has two Input end; the two waveguide input ends of the horn radiator are respectively connected to the output ports of the waveguide E-plane T-shaped structure in the first-layer waveguide power distribution network and the second-layer waveguide power distribution network. The antenna array of the invention has the characteristics of high efficiency, low profile, high gain, narrow beam, easy processing, spanning a wide frequency band and the like.

Description

technical field [0001] The invention relates to a flat panel antenna array of Ka frequency band, which can be used as the front end of static communication and dynamic communication system at the ground end of Ka frequency band satellite communication system, and belongs to the technical field of microwave antennas. Background technique [0002] At present, satellite communication technology using Ka-band has advantages that other frequency bands do not have. For example, compared with traditional Ku-band communication satellites, the number of communication nodes that Ka-band satellites can support is much larger than that of Ku-band. Moreover, Ka-band communication satellites have 4 times the communication bandwidth of Ku-band satellites. After the communication satellites working in the Ka frequency band adopt spot beams, a single spot beam can cover an area with a radius of 250km to 1000km, provide 10 to 25 times frequency multiplexing, and support smaller terminal equip...

AI Technical Summary

Problems solved by technology

Among them, the communication front-end in the form of a reflecting surface has low diameter efficiency, large volume, uncontrollable side lobes, and poor side lobes in the far area.

However, the various forms of panel antennas currently reported have low aperture efficiency (less than 65%) and relatively large volume. When circular polarization is required, the thickness of the antenna array will be thicker.

In addition, the weight of panel antennas in current applications has always been the biggest problem, which is difficult to overcome

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