Testing system and method for phase consistency among frequency variable T/R assembly channels

Abstract

The invention discloses a testing system and method for phase consistency among frequency variable T / R assembly channels and belongs to the technical field of testing. According to the system and the method, reference channels and calibration channels work in a passive state, do not consume power, do not generate heat, do not generate temperature drift and are high in testing accuracy; according to the reference channels and the calibration channels established by introducing double-balanced mixers and lowpass filters, so full-double two-port calibration is possible and the testing accuracy is improved; power supply, state control and transmitting signal regulating devices do not need to be arranged for the reference channels, so system components are simplified, and system construction costs are reduced; the working bands of the double-balanced mixers are relatively wide; frequency unchangeable and one-time frequency variable reference channels and calibration channels are established through switching of switches, so certain university is achieved; and the lowpass filters are introduced into the input and output ports of the reference channels and the calibration channels, so unnecessary spectrum components are filtered, and the accuracy of a testing result is improved.

Description

technical field [0001] The invention belongs to the technical field of testing, and in particular relates to a phase consistency testing system and method between channels of frequency conversion T / R components. Background technique [0002] The T / R component mainly includes three parts: multiple transmitting channels, receiving channels, and drive control. In addition, there are component interface parts such as RF input and output, and low-frequency connectors. The transmitting channel mainly completes the amplification and phase shifting of the RF excitation signal, and outputs it to the feeder network; the receiving channel amplifies and phase-shifts the echo signal received by the antenna, and ensures a low noise figure; the component's transceiver switch switching and phase and attenuation The control is completed by the drive control part. T / R components generally have the characteristics of port multiplexing, that is, the transmit output port is also the receive inp...

AI Technical Summary

Problems solved by technology

[0040] The actual frequency conversion T / R component is used as the reference channel and the calibration channel. Due to the high transmit power of the component, its own phase-frequency response index will have a certain temperature drift, and the transmit signal conditioning device will also have temperature drift. Therefore, the test accuracy is affected. Influence; only the normalized calibration method can be used, which also limits the accuracy of the test results; it is necessary to equip the reference components with power supply, state control and transmission signal conditioning devices, which increases the cost of system construction; it can only correspond to specific frequency bands and systems Frequency conversion T / R component test, poor versatility

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