Waveguide type coupling geophone

Abstract

The invention discloses a waveguide type coupling geophone, which belongs to the technical field of microwave. The waveguide type coupling geophone comprises a waveguide type coupler and a geophone, wherein the geophone comprises a first microstrip line, a second microstrip line and a third microstrip line which are orderly connected; the first microstrip line is inserted into the first preset depth of the waveguide type coupler; the third microstrip line is inserted into the second preset depth of the waveguide type coupler; the first microstrip line and the third microstrip line are positioned on both sides of the midline of the waveguide type coupler respectively; and the second microstrip line is connected with a detector diode and a balancing resistor. The waveguide type coupling geophone has low loss, has the directional coupling capability, and has low cost, small volume and simple processing.

Description

technical field [0001] The invention relates to the field of microwave technology, in particular to a waveguide coupling detector. Background technique [0002] At present, the output forms of microwave power amplifiers mainly include microstrip, coaxial, and waveguide. The common one is the rectangular waveguide dominated by TE10 mode. Microwave power amplifiers usually require a power detection device to monitor the state of the power amplifier at any time and facilitate the debugging and maintenance of the microwave system. [0003] The power detection device of a waveguide microwave power amplifier usually consists of a microwave directional coupler (such as a waveguide directional coupler) and a waveguide detector. The waveguide directional coupler is usually in the form of small hole coupling. In order to improve the bandwidth and directivity, the waveguide directional coupler usually adopts a porous structure, that is, multiple small holes are punched on the wide si...

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Problems solved by technology

[0004] However, the structure of the power detection device is too complicated, and it is very inconvenient to manufacture

For example, the distance between the main and auxiliary waveguides of the small-hole directional coupler is usually required to be very close, so the coupling sheet with a small hole in the middle is difficult to process thinly and with high precision, and the difficulty of coupling sheet installation increases; in addition, because the main and auxiliary waveguides are very close , in order to add a waveguide type detector, the waveguide of the small-hole directional coupler must be turned, which increases the difficulty of processing, so that the loss of the main waveguide of the actually produced power detection device will be relatively large, usually the microstrip power detection The loss of the detector is about 0.5dB. In fact, it can reach more than 1dB in the Ka band, and it is expected to be about 0.5dB in the Ku band. Moreover, the power detection device is large in size and is not suitable for compact power amplifiers.

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