ELECTRICALLY-CONTROLLABLE BACK-FED ANTENNA

Title:

ELECTRICALLY-CONTROLLABLE BACK-FED ANTENNA

Document Type and Number:

WIPO Patent Application WO1999035705

Kind Code:

A3

Abstract:

A user terminal (110) which comprises an electrically-controllable back-fed antenna (300, Fig.3) is used for the formation of single and multiple beams. The electrically-controllable back-fed antenna comprises an RF power distribution/combination network (310), electrically-controllable phase-shifting elements (320), a control network (440, Fig.4) and radiating/receiving elements (360). The control network is coupled to the electrically-controllable phase-shifting elements and is used for controlling the dielectric constant of dielectric material contained within the electrically-controllable phase-shifting elements. In a preferred embodiment, phase-shifting elements comprise waveguide sections containing at least one dielectric material, and the dielectric material includes a ferroelectric material, preferably comprising Barium Strontium Titanate (BST).

Inventors:

COOK DEAN LAWRENCE (US)
BUER KENNETH VERN (US)
DENDY DEBORAH SUE (US)
CORMAN DAVID WARREN (US)

Application Number:

PCT/US1998/025150

Publication Date:

September 23, 1999

Filing Date:

November 25, 1998

Export Citation:

Click for automatic bibliography generation Help

Assignee:

MOTOROLA INC (US)
COOK DEAN LAWRENCE (US)
BUER KENNETH VERN (US)
DENDY DEBORAH SUE (US)
CORMAN DAVID WARREN (US)

International Classes:

H01Q3/26; H01Q3/36; H01Q3/44; H01Q21/06; (IPC1-7): H01Q3/36

Domestic Patent References:

WO1997022158A1

1997-06-19

Foreign References:

US4575727A	1986-03-11
US5589845A	1996-12-31

Other References: