Title :
On the study of passive and active slotline ring antennas
Author :
Ho, C.-H. ; Fan, L. ; Chang, K.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
June 28 1993-July 2 1993
Abstract :
The design and measurement of the passive and active slotline ring antennas are discussed. A simple transmission line method is used to predict the resonant frequency of the slotline ring antenna. Two feed methods for the passive slotline ring antenna are described. A new type of FET active slotline ring antenna is also presented. The measured H-field radiation patterns of the passive and active slotline ring antennas showed that the active antenna had improved copolar pattern and crosspolar level. This active radiating element offers a simple, lightweight, low-cost, small, reproducible, and truly planar active source for quasi-optical power combiners and mixers. The circuit is also amenable to monolithic circuit integration for mass production.<>
Keywords :
MMIC; MMIC mixers; active antennas; antenna feeds; antenna radiation patterns; microwave field effect transistors; planar waveguides; slot lines; FET; H-field radiation patterns; active slotline ring antennas; copolar pattern; crosspolar level; design; feed methods; mass production; measurement; monolithic circuit integration; passive slotline ring antenna; planar active source; quasi-optical mixers; quasi-optical power combiners; resonant frequency; transmission line method; Antenna feeds; Antenna measurements; Circuits; FETs; Power transmission lines; Resonant frequency; Slot antennas; Slotline; Transmission line antennas; Transmission line measurements;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1993. AP-S. Digest
Conference_Location :
Ann Arbor, MI, USA
Print_ISBN :
0-7803-1246-5
DOI :
10.1109/APS.1993.385261
