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

Volume

50

Issue

5

fYear

2002

fDate

5/1/2002 12:00:00 AM

Firstpage

638

Lastpage

640

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;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2002.1011229

Filename

1011229