Title :
A low profile electronically-steerable artificial-impedance-surface antenna
Author :
Gregoire, D.J. ; Colburn, J.S. ; Patel, A.M. ; Quarfoth, Ryan ; Sievenpiper, Daniel
Author_Institution :
Appl. Electromagn. Lab., HRL Labs., LLC, Malibu, CA, USA
Abstract :
A Ku-band, electronically-steerable, artificial-impedance-surface antenna (AISA) was designed, fabricated and measured. It is capable of scanning in elevation from -70° to 80° with gain variation of less than 5 dB. The antenna operates by launching a surface wave along a surface-wave waveguide (SWG) whose impedance elements are rectangular patches with electrically tunable capacitors between them. The radiation beam is scanned in elevation by applying voltages to the varactors to change the SWG´s impedance pattern. Azimuthal scanning can be accomplished with a linear array of SWGs whose relative radiation phases are controlled with variations in the impedance patterns.
Keywords :
antenna radiation patterns; leaky wave antennas; linear antenna arrays; waveguide antenna arrays; AISA; Ku-band; SWG impedance pattern; artificial-impedance-surface antenna; electrically tunable capacitors; impedance elements; linear array; low profile electronically-steerable antenna; radiation beam; rectangular patches; relative radiation phases; surface-wave waveguide; Arrays; Gain; Impedance; Modulation; Surface impedance; Surface waves; Varactors;
Conference_Titel :
Electromagnetics in Advanced Applications (ICEAA), 2014 International Conference on
Conference_Location :
Palm Beach
Print_ISBN :
978-1-4799-7325-5
DOI :
10.1109/ICEAA.2014.6903901
