Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Patent
1995-08-03
1996-12-03
Wimer, Michael C.
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
343701, 343895, H01Q 138, H01Q 2300
Patent
active
055812686
ABSTRACT:
An antenna structure (10) that includes a plurality of transmit linear elements (22a-22d) arranged parallel to one another and a plurality of receive linear elements (24a-24d) also arranged parallel to one another. Individual ones of the plurality of transmit linear elements are spaced apart from one another and have one of the plurality of receive linear elements disposed therebetween. A width of each of the plurality of transmit linear elements and the plurality of receive linear elements varies periodically along a length of the linear element, thereby also periodically impedance modulating each element. Furthermore, a narrowest width portion of a transmit linear element is disposed adjacent to a widest width portion of an adjacently disposed receive linear element, and vice versa, thereby minimizing coupling between the elements. The transmit amplifiers (16a, 16b) and the receive amplifiers (30a, 30b) are located at opposite ends of an antenna stalk body (36) such that the transmit amplifiers and receive amplifiers are intimately associated with their respective antenna elements, thereby further minimizing losses. Also, because the transmit amplifiers may generate considerable heat, the construction technique thermally isolates the lower power receive amplifiers from the higher power transmit amplifiers. Also, the transmit amplifiers are preferably located at the end of the antenna stalk that is nearest to the user transceiver, thereby providing improved heat sinking.
REFERENCES:
patent: 4644360 (1987-02-01), Mead et al.
patent: 5073900 (1991-12-01), Mallinckrodt
patent: 5198831 (1993-03-01), Burrell et al.
patent: 5233626 (1993-08-01), Ames
patent: 5303286 (1994-04-01), Wiedeman
patent: 5339330 (1994-08-01), Mallinckrodt
patent: 5410728 (1995-04-01), Bertiger et al.
patent: 5415368 (1995-05-01), Horstein et al.
patent: 5422647 (1995-06-01), Hirshfield et al.
patent: 5433726 (1995-07-01), Horstein et al.
patent: 5439190 (1995-08-01), Horstein et al.
patent: 5446756 (1995-08-01), Mallinckrodt
patent: 5448623 (1995-09-01), Wiedeman et al.
patent: 5477232 (1995-12-01), Yamamoto
Petition of American Mobile Satellite Corporation Before the FCC, Washington, DC 20554, dated Jun. 3, 1991, pp. 1-15.
Application of Motorola Satellite Communications, Inc. for IRIDIUM A Low Earth Orbit Mobile Satellite System before the FCC, Washington, D.C. Dec. 1990, pp. 49-96.
Before the FCC, Washington, D.C. 20554, Aries Constellation Low Earth Orbit Satellite System Proposal of Constellation Communications, Inc. Jun. 3, 1991, Appendix A, B, and C.
Application of TRW Inc. for Authority to Construct a New Communications Satellite System Odyssey.SM. before the FCC, Washington, D.C. 20554, May 31, 1991 pp. 33-51.
Application of Ellipsat Corporation Ellipsat for the Authority to Construct Ellipso.sup.R I An Elliptical Orbit Satellite System, before the FCC, Washington, D.C. 20554, Nov. 2, 1990, pp. 5-34.
Application of Loral Cellular Systems, Corp., Globalstar Mobile Communications Wherever You Are, before the FCC, Washington, D.C. Jun. 3, 1991, pp. 94-187.
Globalstar L.P.
Wimer Michael C.
LandOfFree
Method and apparatus for increasing antenna efficiency for hand- does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for increasing antenna efficiency for hand-, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for increasing antenna efficiency for hand- will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-788920