Testing system for insertion phase delay of frequency selection material and testing method thereof

Abstract

The invention provides a testing system for insertion phase delay of a frequency selection material and a testing method thereof. The system comprises a vector network analyzer, a 30dB attenuator, a powder divider, a receiver, two pairs of horn antennas and a data processing module; one output port of the vector network analyzer is connected with the transmitting horn antenna, the other output port of the vector network analyzer is connected with one input end of the power divider through the 30 dB attenuator, the other input end of the power divider is connected with the receiving antenna, the output end of the power divider is connected with the receiver, and two ways of signals are combined through the power divider and then output to the receiver; the data processing module is used for forming power testing data collected by the receiver into cosine curves and comparing the cosine curves before and after the frequency selection material is inserted to obtain insertion phase delay of the frequency selection materials at a test frequency point. According to the method, a cosine fitting method of the cosine curves is presented to achieve phase measuring with the high precision and stability on the basis of a testing system model by combining a data processing technology.

Description

technical field [0001] The invention belongs to the field of electromagnetic material research, takes the application trend of the frequency selective material radar radome as the background, and particularly relates to a frequency selective material insertion phase delay test system and a test method thereof. Background technique [0002] Frequency selective surface (Frequencyselectivesurface, referred to as FSS) composite material is a single-layer or multi-layer periodic array structure composed of passive resonant units (metal patches or apertures) in a certain arrangement, referred to as frequency selective material. Its frequency selectivity stems from the interaction of its periodic structure with electromagnetic waves. When the frequency of the incident wave is close to the resonant frequency point of the patch or aperture, the FSS exhibits the characteristic of total reflection or total transmission of the incident wave. It is this characteristic of total reflection...

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Problems solved by technology

Retrieving domestic and foreign literature, there is still a blank about the insertion phase delay test method and data processing method of frequency-selective materials

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