Title :
A Theory of How to Improve the Radiation of the Photoconductive Antenna
Author :
Li, Di ; Huang, Yi
Author_Institution :
Liverpool Univ.
Abstract :
The photoconductive antenna is the most widely used device to generate and detect the terahertz (THz) wave but it has a limitation that the generated power is very low. There have been some investigations into how to increase the radiated THz power and it was found that to excite at a point is a practical method to improve the efficiency. In this paper, a theory is developed to support this idea. The analysis shows the reason why excitation at a point can generate higher THz power than the whole gap excitation of photoconductive antenna.
Keywords :
antenna radiation patterns; photoconducting devices; submillimetre wave antennas; THz wave; photoconductive antenna radiation; terahertz wave; Antenna theory; Dipole antennas; Electrons; Laser excitation; Laser theory; Laser transitions; Photoconducting devices; Photoconductivity; Power generation; Voltage;
Conference_Titel :
Antenna Technology: Small and Smart Antennas Metamaterials and Applications, 2007. IWAT '07. International Workshop on
Conference_Location :
Cambridge
Print_ISBN :
1-4244-1088-6
Electronic_ISBN :
1-4244-1088-6
DOI :
10.1109/IWAT.2007.370183
