Title :
A retrodirective antenna array using a spatially fed local oscillator
Author :
Forsyth, William E. ; Shiroma, Wayne A.
Author_Institution :
Hawaii Center for Adv. Commun., Hawaii Univ., Honolulu, HI, USA
fDate :
5/1/2002 12:00:00 AM
Abstract :
This work investigates a spatially fed local oscillator (LO) for a retrodirective antenna array. Compared to conventional planar transmission-line feed networks, the spatial feed offers a more flexible array layout and easier implementation, especially in large two-dimensional (2-D) arrays. This method of delivery involves radiating the LO through free space to the back-side of the array where it is received by slot-coupled patch antennas and delivered to the mixing elements. A four-element linear retrodirective array utilizing this approach is demonstrated at an LO frequency of 10.7 GHz. Retrodirectivity is observed at scan angles from -40° to +40°
Keywords :
antenna arrays; directive antennas; linear antenna arrays; microstrip antennas; mixers (circuits); oscillators; 10.7 GHz; 2D arrays; LO frequency; linear retrodirective array; mixing elements; planar transmission-line feed networks; retrodirective antenna array; scan angles; slot-coupled patch antennas; spatially fed local oscillator; Antenna arrays; Directive antennas; Feeds; Linear antenna arrays; Local oscillators; Mobile antennas; Patch antennas; Phased arrays; Radio frequency; Transmission lines;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2002.1011229
