Method for measuring standing-wave ratio of antenna port of antenna/radio frequency 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, and the method comprises the steps: vertically placing a planar metal plate at a proper position in the positive radiation direction of the antenna port, adjusting the distance between the metal plate and the antenna port, and observing and recording the change of the received power value of the radiometer in the adjustment process. According to the physical law of multiple reflections of the reverse radiation of the radiometer between the antenna port and the metal plate, a relational expression between the received power change of the radiometer and the reflection coefficient of the antenna port can be established, so that the standing-wave ratio of the antenna port is calculated. Before measurement, a reverse radiation power value reflected by the metal plate and received by the radiometer needs to be simulated or calculated so as to obtain a proportion value of metal plate reflection power entering an antenna port; in addition, the radiometer needs to be calibrated so as to eliminate the output voltage bias of the radiometer during zero power input. According to the method, the characteristics of the microwave and millimeter wave radiometer are utilized, the required hardware and calculation method are simple, the practical operability is high, and an effective means is provided for measuring the standing-wave ratio of the antenna port of the microwave and millimeter wave radiometer with an antenna / radio frequency integrated structure.

Description

Technical field [0001] The present invention relates to the field of microwave millimeter wave measurement, and more particularly to an antenna port standing wave ratio measurement method of antenna / radio frequency integrated radiometer. Background technique [0002] With the integrated miniaturization design of the microwave millimeter wave radiometer, the antenna and the radio receiving channel are not detachably, and the conventional manner is used to measure the antenna alone. Therefore, an antenna port standing wave measurement means suitable for use in a microwave millimeter wave radiometer suitable for an antenna and radio frequency receiving channel integrated structure is urgently needed. [0003] The standing wave ratio of conventional integrated structures must be taken with the test tool, which matches the inner cavity of the antenna, and the interior is the same waveguide structure as the measured passage. When the measuring is measured, the tool is inserted into t...

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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