An Antenna Port Standing Wave Ratio Measurement Method of Antenna/RF Integrated Radiometer

Abstract

The invention discloses a method for measuring the standing wave ratio of an antenna port of an antenna / radio frequency integrated radiometer. The measuring method is to place a plane metal plate vertically at a proper position in the positive radiation direction of the antenna port, and adjust the distance between the metal plate and the antenna port. Observe and record the change of the received power value of the radiometer during the adjustment process. According to the physical law of multiple reflections of the radiometer's reverse radiation between the antenna port and the metal plate, the relationship between the radiometer's received power change and the reflection coefficient of the antenna port can be established, and the standing wave ratio of the antenna port can be calculated. Before measurement, it is necessary to simulate or calculate the reverse radiation power value received by the radiometer reflected by the metal plate to obtain the ratio value of the reflected power of the metal plate entering the antenna port; in addition, the radiometer needs to be calibrated to eliminate zero The output voltage of the radiometer is biased at power input. The method of the present invention utilizes the characteristics of the microwave millimeter wave radiometer itself, the required hardware and calculation method are simple, and the operability is strong, which provides an effective method for measuring the standing wave ratio of the antenna port of the microwave millimeter wave radiometer with an antenna / radio frequency integrated structure. means.

Description

technical field [0001] The invention relates to the field of microwave and millimeter wave measurement, in particular to a method for measuring the standing wave ratio of an antenna port of an antenna / radio frequency integrated radiometer. Background technique [0002] With the integrated and miniaturized design of the microwave and millimeter wave radiometer, the antenna and the radio frequency receiving channel cannot be separated, and it becomes impossible to measure the standing wave ratio of the antenna alone by the traditional method. Therefore, there is an urgent need for a standing wave measurement method at the antenna port of a microwave and millimeter wave radiometer with an integrated structure of an antenna and a radio frequency receiving channel. [0003] The standing wave ratio measurement method of the conventional integrated structure needs the help of the test tooling, the shape of the tooling matches the inner cavity of the antenna, and the inside is the s...

AI Technical Summary

Problems solved by technology

Although this method can measure the channel standing wave ratio of the integrated structure, it ignores the influence of the antenna structure

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