Title :
Modal-expansion analysis of electrically steerable passive array radiators (ESPAR)
Author :
Wang, Quanxin ; Shen, Zhongxiang
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
The modal-expansion method has been used for analyzing electrically steerable passive array radiators (ESPAR) driven by a gap source. A simple model of a four-element ESPAR antenna has been studied and its S-parameter results are in good agreement with those by HFSS. A designed seven-monopole ESPAR antenna has been discussed and simulation results have shown that it can be used to steer its radiation beam by properly adjusting the loaded varactors of its passive elements.
Keywords :
S-parameters; antenna radiation patterns; beam steering; modal analysis; monopole antenna arrays; varactors; S-parameter; electrically steerable passive array radiators; four-element ESPAR antenna; gap source; loaded varactors; modal-expansion analysis; passive elements; radiation beam; seven-monopole ESPAR antenna; Antenna arrays; Bandwidth; Coaxial components; Costs; Directive antennas; Feeds; Polarization; Transmission line antennas; Varactors; Voltage;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1552730
