The frequency range of the circuit is from 1.7 GHz to 3.4 GHz, and the dynamic range is approximately 40 dB.ĭirectional couplers and in-phase-quadrature (IQ) demodulators sense the forward and reverse phase and amplitude.
The reference design shown in Figure 1 implements a complete two-port radio frequency (RF) vector network analyzer using a zero intermediate frequency (ZIF) architecture. This technique is most commonly used to measure the gain, reflection coefficient, and reverse isolation of electronic circuits, such as RF amplifiers and filters, but can also be expanded to analyze characteristics of a material, such as its moisture content. Vector network analysis is a technique to measure the phase shift and attenuation of signals as they propagate through a medium or are reflected by the medium.
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