Title :
A hybrid nonlinear delay line-based broad-band phased antenna array system
Author :
Hsia, R.P. ; Zhang, W.-M. ; Domier, C.W. ; Luhmann, N.C., Jr.
Author_Institution :
Dept. of Appl. Sci., California Univ., Davis, CA, USA
fDate :
5/1/1998 12:00:00 AM
Abstract :
Nonlinear delay line (NDL) technology has been utilized to implement a proof-of-principle, broadband, 8-channel, linear, hybrid NDL-based phased antenna array (PAA) system. The hybrid NDLs provide up to 267 ps analog, variable true time delay (TTD) with <5-dB measured insertion loss. A PAA system incorporating wide-band feed, transition, and antenna elements has been developed for broad-band (4-18 GHz), electronically controlled beam steering. The current system has demonstrated up to ±180 beam steering from 4 to 5 GHz, and ±6° at 6 GHz in good agreement with theoretical predictions; monolithic implementations have been designed to provide ±19° beam steering at frequencies up to 18 GHz and are currently being fabricated. This system provides a wide-band, low-cost, high-precision alternative to conventional PAA technologies
Keywords :
antenna feeds; antenna phased arrays; coplanar waveguides; delay lines; linear antenna arrays; power dividers; slot antenna arrays; 267 ps; 4 to 18 GHz; CPW; broadband phased antenna array; electronically controlled beam steering; hybrid nonlinear delay line-based system; variable true time delay; wideband feed; wideband transition; Antenna arrays; Antenna measurements; Beam steering; Broadband antennas; Delay effects; Delay lines; Linear antenna arrays; Loss measurement; Phased arrays; Time measurement;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
