Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Reexamination Certificate
2005-03-08
2005-03-08
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
Reexamination Certificate
active
06864837
ABSTRACT:
A dual-polarization wireless base station antenna that implements vertical electrical downtilt and sidelobe reduction using beam steering circuit that includes a variable power divider and a multi-beam beam forming network. The variable power divider includes a single adjustable control element to divide an input voltage signal into a pair of complimentary amplitude voltage drive signals that exhibit matched phase and constant phase delay through the variable power divider. The beam forming network is configured as a double-sided, edge-connected microstrip module mounted to a main panel, which support the antenna elements in a vertical column organized into sub-arrays in a manner that implements sidelobe reduction. The power distribution network connecting the beam steering network to the antenna elements implements beam tilt bias and sidelobe reduction through coordinated phase shifting implemented through transmission media trace length adjustment.
REFERENCES:
patent: 2913723 (1959-11-01), Thourel
patent: 3222677 (1965-12-01), Fink
patent: 4335388 (1982-06-01), Scott et al.
patent: 4799065 (1989-01-01), Thompson
patent: 5151706 (1992-09-01), Roederer et al.
patent: 6188373 (2001-02-01), Martek
patent: 6282434 (2001-08-01), Johannisson et al.
patent: 6292133 (2001-09-01), Lynch
patent: 6337659 (2002-01-01), Kim
patent: 6351243 (2002-02-01), Derneryd et al.
patent: 6441785 (2002-08-01), Rosen et al.
patent: H9-232865 (1997-09-01), None
patent: P2001-136016 (2001-05-01), None
patent: WO 01 29926 (2001-04-01), None
Yamada, Y., Ebine, Y., and Kijima, M—Low Sidelobe Characteristics of a Dual-frequency Base Station Antenna in the Case of Electrical Beam Tilt Use—1999 IEEE Antennas and Propagation International pp 1-4.
Kijima, M., Ebine, Y., Yamada, Y.,—Development of a Dual-Frequency Base Station Antenna for Cellular Mobile Radios—Apr., 1999 IEICE Trans. Comm., vol. E82-B, No. 4, pp 636-644.
Kira, F., Ueno, K., Ohira, T., and Ogawa, H.,—New Design Approach to Multiple-Beam Forming Network for Beam Steerable Phased Array Antenna—Jul. 1999, IEICE Trans Electron, vol. EB2-C, No. 7 pp 1195-1201.
Kira, F., and Hori, T.—Beamforming Network Design for Cluster Feeding of Highly Functional Scanning Antenna—Sep. 2001, IEICE Trans. Commun., vol. E84-B, No. 9, pp 2436-2442.
Carson James Crawford
Janoschka Darin M.
Runyon Donald L.
EMS Technologies, INc.
Gregory Bernarr E.
Mehrman Michael J.
Mehrman Law Office P.C.
Mull F H
LandOfFree
Vertical electrical downtilt antenna does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vertical electrical downtilt antenna, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vertical electrical downtilt antenna will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3405284