Novel low-loss delay line for broadband phased antenna array applications

Author

Zhaug, W.-M. ; Hsia, R.P. ; Liang, C. ; Song, G. ; Domier, C.W. ; Luhmann, N.C.

Author_Institution

Dept. of Appl. Sci., California Univ., Davis, CA, USA

Volume

6

Issue

11

fYear

1996

fDate

11/1/1996 12:00:00 AM

Firstpage

395

Lastpage

397

Abstract

The microwave propagation velocity along a nonlinear transmission line is a function of dc bias, hence, a nonlinear transmission line (NLTL) can be utilized as a broadband delay line. A hybrid NLTL has been fabricated in a proof-of-principle experimental concept test where a 1.1-ns true time delay with <4-dB insertion loss has been measured in good agreement with theory. A 2×2 NLTL-based antenna array has been utilized to demonstrate beam steering at 5 GHz. Using parameters appropriate to varactors tested by our group at 60 GHz, a monolithic NLTL is predicted to exhibit <3.4-dB insertion loss and 200 ps delay at 20 GHz

Keywords

antenna phased arrays; delay lines; microwave antenna arrays; transmission lines; 1.1 ns; 4 dB; 5 GHz; beam steering; broadband phased antenna array; delay line; hybrid monolithic NLTL; insertion loss; microwave propagation velocity; nonlinear transmission line; Antenna arrays; Antennas and propagation; Broadband antennas; Delay effects; Delay lines; Insertion loss; Microwave propagation; Phased arrays; Testing; Transmission line theory;

fLanguage

English

Journal_Title

Microwave and Guided Wave Letters, IEEE

Publisher

ieee

ISSN

1051-8207

Type

jour

DOI

10.1109/75.541451

Filename

541451