A millimeter-wave ferrite switch matrix in the form of an all-waveguide

Abstract

The present invention relates to a full-waveguide millimeter wave ferrite switching matrix. The full-waveguide millimeter wave ferrite switching matrix comprises a ferrite switching unit; the input end of the ferrite switching unit is provided with an inlet isolator through a waveguide, and the two output ends of the ferrite switching unit are respectively provided with an output isolator through a waveguide, and therefore, a one-out-two switching matrix can be formed; the input end of the inlet isolator is the horizontal polarization input end of the one-out-two switching matrix; the output ends of the two output isolators are the horizontal polarization output ends of the one-out-two switching matrix; and three or more one-out-two switching matrixes are combined to form a one-out-three switching matrix or one-out-n switching matrix, wherein n is larger than 3. Compared with a conventional semiconductor switching matrix, and according to the full-waveguide millimeter wave ferrite switching matrix of the invention, a microstrip-waveguide conversion transition structure is omitted, and therefore, the structure of the full-waveguide millimeter wave ferrite switching matrix is simper, and the processing cost of the full-waveguide millimeter wave ferrite switching matrix is lower, and the processing cost of the full-waveguide millimeter wave ferrite switching matrix is reduced by at least 20%; and the switching matrix has higher power withstanding level, and the average power of the full-waveguide millimeter wave ferrite switching matrix can achieve 15W, and the power withstanding level of the full-waveguide millimeter wave ferrite switching matrix is more than three times of that of the semiconductor switching unit, and the loss of the full-waveguide millimeter wave ferrite switching matrix is lower under same power.

Description

technical field [0001] The invention belongs to the technical field of waveguide multi-beam antennas for millimeter-wave radar and communication systems, and specifically relates to a waveguide mainly composed of a ferrite switch unit, an isolator, a U-shaped waveguide, and some straight waveguides, E-bend waveguides, H-bend waveguides, and twisted waveguides. and so on composed of ferrite switch matrix. Background technique [0002] Multi-beam antenna can use a single antenna to form multiple beams in different directions. In addition to effectively reducing the volume and cost, it can also achieve wide-angle coverage. It is a key technology in wireless communication and modern radar, and has a wide range of applications. application prospects. The waveguide antenna in the millimeter wave band has the advantages of low loss, high gain, and high power resistance, so the multi-beam antenna system in the millimeter wave band mostly adopts the waveguide antenna form. The switc...

AI Technical Summary

Problems solved by technology

The waveguide antenna in the millimeter wave band has the advantages of low loss, high gain, and high power resistance, so the multi-beam antenna system in the millimeter wave band mostly adopts the waveguide antenna form. The switch matrix is ​​the main component of the waveguide multi-beam antenna system. Currently, the switch matrix uses Semiconductor switch unit, the disadvantages of this form of switch matrix are: 1. Low power resistance

The power resistance level of the switch matrix is ​​determined by the switch unit. At present, the power resistance of the semiconductor switch unit is only about 4W (average power), resulting in a low power resistance level of the waveguide multi-beam antenna system, which greatly limits the distance of wireless communication and the range of radar detection power; 2. The semiconductor switch unit in the millimeter wave band has a large loss, and the GaAsPIN switch unit with the smallest loss in the case of low power (average power less than 4W) also has about 0.8dB, and the loss caused by the microstrip-waveguide transition structure causes the loss of the entire switch matrix to be biased. Large, which reduces the gain of the antenna system and the range of detection power; 3. Complex structure, high processing cost, and large loss

The semiconductor switch unit is not in the form of a waveguide, and needs to go through a microstrip-waveguide conversion transition structure to connect with the waveguide system, resulting in an extremely complex structure of the entire switch matrix and increased processing costs

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