Title :
A Pattern Reconfigurable Null Scanning Antenna
Author :
Yong, Siwen ; Bernhard, Jennifer T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Illinois at Urbana-Champaign, Urbana, IL, USA
Abstract :
The design, analysis, and measurement of a reconfigurable null scanning antenna operating at 2.4 GHz are presented. Unlike existing null reconfigurable antennas, this compact antenna scans its pattern null continuously, and maintains its impedance bandwidth without the need for feed reconfiguration. Incorporation of 12 varactors enables null reconfiguration. Full-wave simulations of the antenna, including the bias network and the lumped circuit model for the varactors, predict antenna performance. Impedance and pattern measurements verify simulated results.
Keywords :
UHF antennas; antenna radiation patterns; varactors; bias network; frequency 2.4 GHz; full-wave simulations; impedance bandwidth; impedance measurements; lumped circuit model; pattern measurements; pattern reconfigurable null scanning antenna; varactors; Antenna measurements; Antennas; Capacitance; Impedance; Resonant frequency; Varactors; Voltage measurement; Cognitive radio; microstrip; null scanning; pattern reconfigurable antenna;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2207336
