Short-wave large-power directional coupler

Abstract

The invention relates to a shortwave and high-power directional coupler which is divided into a coaxial cavity body and a coupling head. A coupling head circuit is installed on the wall of the cavity body; the coupling head circuit comprises a sampling loop (L1) and a sampling capacitance (C2); one end of the sampling loop (L1) is connected with the ground, and the other end is connected with the ground through a capacitor and a resistance element connected in series; the connecting end of the capacitor and the resistance is connected with a commutation diode; the outputs (R2 and C4) of the commutation diode are connected with a filter circuit, and DC voltage which can reflect the size of the power is output after the adjustment of a regulation resistance; and the negative end of the diode is also connected with the sampling capacitance (C2) coupled with the cavity body. The invention can flexibly detect positive and negative power, the same coupling head can detect the positive power and can detect the negative power only by rotating the cavity body by 180 degrees.

Description

1. Technical field [0001] The invention relates to radio frequency electronic technology, especially a short-wave high-power directional coupler. 2. Background technology [0002] my country's short-wave communication has mainly used 100W-1000W transmitters for many years. As the electromagnetic environment becomes more and more complex, electronic countermeasures become increasingly fierce. In order to communicate farther and better, communication, radar, electronic countermeasures, electromagnetic detection, etc. The demand of users for high-power transmitters of SkW~50kW is also increasing day by day. The high-power transmitter with short-wave broadband is a new technology and new product successfully developed in my country in recent years. In radio frequency and microwave technology, directional coupler is one of the key technologies, it can distribute, sample, detect, control and so on the power. There are many types of directional couplers at home and abroad. Accordi...

AI Technical Summary

Problems solved by technology

There are many types of directional couplers at home and abroad. According to the type of transmission line, there are waveguide, coaxial, and microstrip directional couplers; according to the strength of the coupler, there are strong coupling, medium coupling, and weak coupling. The principles of directional couplers are different, and the structure is very different, but there is no directional coupler that is completely suitable for the high-power transmitter developed by our unit.

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