Title :
Design of THz antennas for a continuous-wave interdigitated electrode photomixer
Author :
Kazim, M. Imran ; Jepsen, Peter Uhd ; Krozer, Viktor
Author_Institution :
Dept. of Electr. Eng., Tech. Univ. Eindhoven, Eindhoven
Abstract :
The design of a dual-slot antenna integrated with an interdigitated electrode (IDE) LT GaAs photomixer together with choke filters and a dielectric lens, optimized for high output power at an operating frequency of 1 THz is proposed. An equivalent-circuit model for determination of coplanar waveguide (CPW) IDE capacitance is suggested, in order to tune it out using a dual-slot antenna. The initial design based on a Smith chart approach has been validated by carrying out exhaustive simulations in CST MicroWave Studio software. The radiation efficiency, incase of a dual-slot antenna integrated with a lumped capacitor element is found to be 81% with a directivity value of 11.47 dBi. The effect of choke filters on different antenna radiation parameters is also investigated. A 3-fan CPW radial stub gives a radiation efficiency of 62% with a directivity of 10.5 dBi and has a potential of providing better performance.
Keywords :
III-V semiconductors; antenna radiation patterns; capacitors; coplanar waveguides; filters; gallium arsenide; mixers (circuits); slot antennas; CPW radial stub; CST MicroWave Studio software; GaAs; Smith chart approach; antenna radiation parameters; choke filters; continuous-wave interdigitated electrode photomixer; coplanar waveguide; dielectric lens; dual-slot antenna; frequency 1 THz; interdigitated electrode; lumped capacitor element; Coplanar waveguides; Design optimization; Dielectrics; Electrodes; Filters; Gallium arsenide; Inductors; Lenses; Optical design; Power generation;
Conference_Titel :
Antennas and Propagation, 2009. EuCAP 2009. 3rd European Conference on
Conference_Location :
Berlin
Print_ISBN :
978-1-4244-4753-4
Electronic_ISBN :
978-3-00-024573-2
