Title :
Wideband/image-rejection distributed mixer integrated with a CRLH leaky wave antenna
Author :
Wu, Chung-Tse Michael ; Itoh, Tatsuo
Author_Institution :
Dept. of Electr. Eng., Univ. of California, Los Angeles, CA, USA
Abstract :
In this paper, we propose a distributed mixer integrated with a CRLH leaky wave antenna. The down converting mixer uses GaAs MESFETs as the nonlinear mixing devices, consisting of a CRLH transmission line in the gate line and a microstrip line in the drain line. The RF signal is received from the free space through the CRLH leaky wave antenna, whereas the LO signal is injected from the port of the same CRLH transmission line operated in the guided wave region. To synchronize the phase and align the unit-cell between the gate and drain line, we periodically loaded capacitors on the microstrip line. Due to the cutoff frequency of the CRLH-TL dispersion relationship, the proposed distributed mixers can exhibit image frequency rejection.
Keywords :
III-V semiconductors; Schottky gate field effect transistors; gallium arsenide; leaky wave antennas; microstrip antennas; mixers (circuits); transmission lines; CRLH leaky wave antenna; CRLH transmission line; GaAs MESFET; LO signal; RF signal; drain line; gate line; image-rejection distributed mixer; microstrip line; nonlinear mixing devices; wideband mixer; Delta modulation; Gallium arsenide; Lighting; Programmable logic arrays; Radio frequency; CRLH-transmission lines; Distributed mixers; Leaky wave antennas;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2010 Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-1-4244-7590-2
Electronic_ISBN :
978-1-902339-22-2
