Title :
Cavity backed four-arm slot like spiral antenna for dual mode operation
Author :
Bhobe, A.U. ; Filipovic, D.S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA
Abstract :
Two different types of cavity backed four-arm slot like spiral antennas, fed through a metal backed coplanar waveguide (CPW), are presented in this paper. The spiral antennas are designed to operate between 1 and 3 GHz for normal (broadside) beam and split mode operation. A finite element - boundary integral (FE-BI) code is used to numerically analyze various antenna parameters. The antennas are built on a dielectric substrate with permittivity 2.2 and thickness of 0.0787 cm to fit in an 8.16/spl times/8.16/spl times/1.5 cm/sup 3/ cavity. Measured and computed data are presented and generally good agreement was obtained.
Keywords :
UHF antennas; antenna feeds; boundary integral equations; broadband antennas; coplanar waveguides; finite element analysis; multifrequency antennas; slot antennas; spiral antennas; 0.0787 cm; 1 to 3 GHz; 1.5 cm; 8.16 cm; CPW; FE-BI; broadside beam operation; cavity backed spiral antenna; dielectric substrate; dual mode operation; finite element-boundary integral code; four-arm slot like spiral antenna; metal backed coplanar waveguide feed; split mode operation; wideband antennas; Arm; Coplanar waveguides; Costs; Dielectric substrates; Feeds; Frequency; Impedance matching; Military communication; Slot antennas; Spirals;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
DOI :
10.1109/APS.2003.1219204
