Title :
Switched parasitic antenna on a finite ground plane with conductive sleeve
Author :
Schlub, Robert ; Thiel, David V.
Author_Institution :
Sch. of Microelectron. Eng., Griffith Univ., Nathan, Qld., Australia
fDate :
5/1/2004 12:00:00 AM
Abstract :
A switched parasitic monopole antenna on a finite ground structure with a conductive sleeve attached to a small, circular ground plane controls the vertical radiation direction. The antenna was designed using a genetic algorithm and finite element (FEM) solver. At 1.575 GHz, the constructed antenna exhibited a front to back ratio of 10.7 dB and gain of 6.4 dBi with no elevation from the horizontal. The switched parasitic nature of the antenna allowed it to steer a directional beam through 5 locations in the azimuth. Incremented from 0λ to 0.45λ, the sleeve was observed to linearly depress the main lobe elevation with little influence on other antenna characteristics such as gain and S11.
Keywords :
UHF antennas; antenna radiation patterns; antenna testing; finite element analysis; genetic algorithms; mobile radio; monopole antenna arrays; radio direction-finding; 1.575 GHz; FEM; conductive sleeve; finite element solver; finite ground structure; genetic algorithm; steerable antennas; switched parasitic monopole antenna; vertical radiation direction; Algorithm design and analysis; Antenna arrays; Costs; Dipole antennas; Directive antennas; Finite element methods; Gain; Genetic algorithms; Phased arrays; Wireless communication; Conductive sleeve; finite ground plane; steerable antennas; switched parasitic antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2004.827504
