An Accurate Circuit Model for Photoconductive Antennas
Abstract
THz photoconductive antennas are among the most popular devices for THz wave generation and detection. A novel and accurate circuit is proposed to model the performance of such antennas, especially those which are frequency dependant. The suggested equivalent circuit consists of an external source voltage, a source input admittance, a loss resistance related to the electrode loss resistance, a frequency-dependant capacitance associated with capacitive behavior of the gap between the electrodes, and a controlled voltage dependant source representing the screening of photo-carriers. Based on this model, the radiation from a simple frequency dependent antenna, i.e. a dipole antenna, is investigated. Excellent agreement is observed between the obtained results by the proposed equivalent circuit model and those by measurement.
Keywords
Cite
@article{arxiv.1903.01984,
title = {An Accurate Circuit Model for Photoconductive Antennas},
author = {Fatemeh aghili and Ali Mahjoori},
journal= {arXiv preprint arXiv:1903.01984},
year = {2019}
}