AnsweredAssumed Answered

Calibration problem or measurement problem?

Question asked by on Dec 23, 2011
Latest reply on Dec 29, 2011 by

I tried to measure S11 of several antennas I designed but the measurement results were not good as I expected (totally wrong I should say). I used some other stadard attennas for the same measurements but I got the same bad results.

I calibrated port 1 with ECal 4 port. 1 port was used for calibration and 3 ports were termined by 50 Ohm load. I used standard antenna 2.4 GHz. The center frequency was 2.4 GHz and span was 1 GHz.

After calibration, I connected the antenna. However, the measured S11 did not show the characteristics of the antenna like resonance frequency.

Does anyone have idea what was wrong with my measurements?

Thanks and best regards,