摘要 |
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). |
申请人 |
MOTOROLA, INC.;COOK, DEAN, LAWRENCE;BUER, KENNETH, VERN;DENDY, DEBORAH, SUE;CORMAN, DAVID, WARREN |
发明人 |
COOK, DEAN, LAWRENCE;BUER, KENNETH, VERN;DENDY, DEBORAH, SUE;CORMAN, DAVID, WARREN |