A modular multiport vector network analyzer for electromagnetic tomography applications

Electromagnetic Tomography (EMT) measurement systems with low power consumption, high performance in terms of measurement accuracy and the capability of handling numerous antennas are needed for widely applied EMT. A highly modular approach for such a system is described in this paper. The shown concept allows to measure the required S-parameters, as needed for imaging of attenuative test objects, on any number of antennas simultaneously. This reduces total measurement time, without degradation of measurement accuracy. The presented concept has been realized as a prototype for 32 antennas and experimentally verified using a measurement chamber.