A novel wide-band tunable RF phase shifter using a variable optical directional coupler

Authors
Ghorbani, K Mitchell, A Waterhouse, RB Austin, MW
Citation
K. Ghorbani et al., A novel wide-band tunable RF phase shifter using a variable optical directional coupler, IEEE MICR T, 47(5), 1999, pp. 645-648
Citations number
8
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
ISSN journal
00189480 → ACNP
Volume
47
Issue
5
Year of publication
1999
Pages
645 - 648
Database
ISI
SICI code
0018-9480(199905)47:5<645:ANWTRP>2.0.ZU;2-3
Abstract
We present a novel RF phase-shifter design with a usable bandwidth of 80:1. The design is verified through demonstration of a proof of concept device, consisting of a readily available voltage variable optical coupler fabrica ted from LiNbO3, combined with an optic-fiber delay line. The design is ana lyzed theoretically and measurement of the device confirms the predicted ra nge of operation. Methods of extension of this range of operation are discu ssed.