An efficient way to test the unsymmetrical nonlinear response of biological tissue samples exposed to a 0.9GHz signal is to observe the second harmonic at 1.8GHz in a cavity resonant at the two frequencies. An electrical circuit model is proposed to calibrate the performance of nonlinear RF energy conversion inside a high quality factor resonant cavity with a known nonlinear loading device. The first and second harmonic response of the cavity due to loading with the lossy material is also demonstrated. The results from the proposed mathematical model give a good indication of the input power required to detect the weak second harmonic signal prior to performing the measurement. Hence, this proposed mathematical model will assist in determining the level of the second harmonic signal in its detector: this can be adjusted by supplying the specific input power required.
1st Mosharaka International Conference on Biomedical Engineering, Electronics and Nanotechnology (MIC-BEN 2011)
Congress
2011 Global Congress on Biomedical Engineering, Electronics and Nanotechnology (GC-BEN 2011), 9-11 September 2011, Amman, Jordan
Pages
21-24
Topics
Biomedical Imaging Systems Wireless Bio-Instrumentation
ISSN
2227-331X
DOI
BibTeX
@inproceedings{188BEN2011,
title={Proposed circuit model for calibration of nonlinear responses in biological media exposed to RF energy},
author={Chan Hwang See, and Raed Abd-Alhameed, and Yousef Dama, and Peter Excell},
booktitle={2011 Global Congress on Biomedical Engineering, Electronics and Nanotechnology (GC-BEN 2011)},
year={2011},
pages={21-24},
doi={}},
organization={Mosharaka for Research and Studies}
}
