Title :
Dual-wideband log-periodic antennas
Author :
Mruk, Joseph ; Uhm, Manseok ; Filipovic, Dejan
Author_Institution :
Colorado Univ., Boulder, CO
Abstract :
Two log-periodic (LP) antenna configurations able to suppress a specific frequency band are introduced in this paper. LP antennas belong to the class of frequency independent antennas and are able to achieve multi-decade wide bandwidths. We start with a parametric study of a traditional planar curved tooth LP antenna aimed in determining the means for achieving specific bandwidth. Two techniques for accomplishing consistent near/far-field dual-band performance are introduced next. The first is a LP antenna integrated with a dual-wideband feed line, and the second one is a LP with removed resonant teeth. Antennas and feeds are designed on a microstrip substrate and method of moments modeling within FEKO is used to demonstrate their performance. Required dual-band operation is 1.8-5 GHz and 7-11 GHz.
Keywords :
UHF antennas; antenna feeds; broadband antennas; log periodic antennas; method of moments; microstrip antennas; multifrequency antennas; planar antennas; dual-wideband feed line; dual-wideband log-periodic antennas; frequency 1.8 GHz to 5 GHz; frequency 7 GHz to 11 GHz; method of moments modeling; microstrip substrate; multidecade wide bandwidths; near-far-field dual band performance; planar curved tooth antenna; Antenna feeds; Bandwidth; Dual band; Frequency; Log periodic antennas; Microstrip antennas; Moment methods; Parametric study; Resonance; Teeth;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2041-4
Electronic_ISBN :
978-1-4244-2042-1
DOI :
10.1109/APS.2008.4619144
