A new direct-conversion wide-band (0.9-4 GHz) four-port receiver is proposed as an
alternative to the well-known six-port receiver. The prototype circuit is fabricated to validate …

The possibility of complex reflection coefficient value estimation via discrete Fourier
transform of output signals of equidistant probes in multiprobe measuring line is considered …

A simple, compact, and low-cost three-probe microstrip impedance measuring scheme has
been developed. The impedance of an unknown load can be determined by measuring the …

Following a previous article reporting a general theory and a new approach using multiple
probes to measure the complex impedance of an unknown microwave load, this article …

A detailed analysis of the five-port reflectometer is presented in this paper. The possibility
and application limitation of using a five-port to measure complex reflection coefficients is …

A dual 5-port network analyzer using fixed electric probes is presented. To measure S/sub
11/and| S/sub 21/|, the RF signal is applied to port 1 of the DUT through one 5-port junction …

The six-port reflectometer is believed to be applied in the next generation of network
analyzer, especially as working at high frequency in the microwave region. In our work, a six …

A five-port automatic reflectometer is presented. The measuring cell consists of three fixed
probes on a rectangular waveguide. The system performance is described and a procedure …

Recently, two novel single-port, phase-shifter based vector network analyzer (VNA) systems
were developed and tested at X-band (8.2–12.4 GHz) and Ka-band (26.4–40 GHz) …

Sensitivity analysis is presented for wideband single-port vector reflectometers designed
based on a noncoherent detection scheme. Simulations are performed to obtain the …