A contact-less small antenna characterization through impedance modulation

Conference: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
03/23/2009 - 03/27/2009 at Berlin, Germany

Proceedings: EuCAP 2009

Pages: 3Language: englishTyp: PDF

Personal VDE Members are entitled to a 10% discount on this title

Monsalve, B.; Blanch, S.; Romeu, J.; Jofre, L. (Antennalab, Signal Theory and Communications department, Universitat Politècnica de Catalunya, Jordi Girona, 1-3 Barcelona)

In smalls antennas S-parameters measurements are highly influenced by the measurement equipment as well as the environment. In order to avoid this inconvenience, a wireless and non-invasive characterization setup is required. In this paper a novel contact-less measurement setup is developed based on the Radar Cross Section (RCS) measurement method using impedance modulation. A small (2x2cm2) autonomous and selfpowered communication device is presented as a system able to change the load impedance of the antenna under test (AUT) to produce impedance modulation. The device contains a microprocessor, a switch able to change between three different load impedances and a 5V battery.