A novel six-port circuit based on four quadrature hybrids

Abstract

A novel six-port circuit is proposed and demonstrated. The circuit is based on four quadrature hybrids. A prototype circuit is fabricated and characterized with microstrip lines. Reflection coefficients for a few loads are measured with the fabricated circuit to evaluate its performance. The results agree with those from an HP8510C network analyzer reasonably well. Using active inductors and varactors, the six-port circuit is also designed with a 0.13 lm CMOS process. The simulation results show that the operating frequency is tunable from 1 to 6.8 GHz.

Exploiting Filter Stopband for Radio Frequency Interferometer Operation

“…Thus, simple six-port circuit reflectometers could be exploited to build on chip interferometer system with the circuit in Fig. 1 [16]. Furthermore, the proposed model predicts the sensitivity of the interferometer reasonably well.…”

Fast parameter measurements for antenna-feeder devices

“…Automated analyzers, based on six-port reflectometers (SPR), are widely used for measuring the parameters of the antenna-feeder devices (AFD) in the millimeter wavelength range [1][2][3][4]. In the measurement transducer of SPR the matched multiport passive microwave connection is used for the complex composition of the reference wave generator and a wave reflected from the object [5].…”

Electromagnetic model of E-cross for sixport reflectometer

“…Automated analyzers, based on six-port reflectometers (SPR), are widely used for measuring the parameters of the microwave devices [1]- [3]. In the measurement transducer of SPR the matched multiport passive microwave connection is used for the complex composition of the reference wave generator and the wave reflected from the object [2].…”