Talks and Poster Presentations (with Proceedings-Entry):

L.W. Mayer, A.L. Scholtz:
"Gain and Input Impedance Measurement for UHF Transponder Antennas";
Talk: 2008 International Symposium on Antennas and Propagation, Taipei, Taiwan; 10-27-2008 - 10-30-2008; in: "2008 International Symposium on Antennas and Propagation", (2008), Paper ID 1644897, 4 pages.

English abstract:
It was shown by numerous authors that the characterization of RFID (radio-frequency identification) transponder antennas that are favored to be small, have low gain, and show a strongly reactive input impedance, is far from trivial. We propose a method that utilizes a small, highly-stable, battery-driven signal source to generate the transmit signal directly at the antenna. The signal source is equipped with a tunable matching network that allows to determine the antenna impedance by a source-pull measurement. Antenna gain can be measured by using the battery-powered oscillator as a calibrated transmitter.

gain input impedance measurement UHF transponder tag antenna efficiency pre-matched tuner

Electronic version of the publication:

Created from the Publication Database of the Vienna University of Technology.