Broadband antennas

Communications: radio wave antennas – Antennas – Balanced doublet - centerfed

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C343S876000, C250S227180

Reexamination Certificate

active

06859189

ABSTRACT:
The fast switching multifunction antenna of the present invention is a variable length antenna that may be switched to provide the equivalent function of a broadband antenna. The variable length antenna quasi-continuously transmits or receives signals at a plurality of frequencies by changing the effective length of the antenna using a variety of switching mechanisms. The present invention may comprise a plurality of antenna segments, a plurality of selectively actuable switches for interconnecting the antenna segments, and a switching mechanism operably coupled to the plurality of selectively actuable switches for switching them at a switching rate that is greater than twice the highest frequency to be transmitted or received. The switching rate will be fast enough to allow the antenna to sample the highest frequency and all of the required lower frequencies within the desired frequency range without the loss of information at any frequency. However, the switching rate is slow enough to allow sampling of the frequency at each antenna length before the next antenna length is activated.

REFERENCES:
patent: 4001773 (1977-01-01), Lamel et al.
patent: 4368385 (1983-01-01), Kanbe et al.
patent: 4369371 (1983-01-01), Hara et al.
patent: 4376285 (1983-03-01), Leonberger et al.
patent: 4546249 (1985-10-01), Whitehouse et al.
patent: 4835500 (1989-05-01), Sequeira
patent: 5029306 (1991-07-01), Bull et al.
patent: 5293172 (1994-03-01), Lamberty et al.
patent: 5402259 (1995-03-01), Lembo et al.
patent: 5565879 (1996-10-01), Lamensdorf
patent: 5719975 (1998-02-01), Wolfson et al.
patent: 5731790 (1998-03-01), Riza
patent: 6417807 (2002-07-01), Hsu et al.
Rogers, Dennis L., “Monolithic Integration of a 3-GHZ Detector/Preamplifier Using a Refractory—Gate, Ion—Implanted MESFET Process”, IEEE Electron Device Letters, 1996, EDL-7, pp. 600-602, U.S.
Albares, D.J., Garcia, G.A., Chang, C.T., and Reedy, R.E., “Optoelectronic Time Division Multiplexing”, Electronic Letters, 1987, 23, pp. 327-328, U.S.
Mendelson, V.L., Kozlov, A.I., and Finkelshteyn, M.I., “Some Electrodynamic Models of Ice Sheets, Useful in Radar Sounding Problems”, Izvestiya Akademii Nauk SSR, Fizika Atmosfery I Okanea, 1972, 8, pp. 396-402, USSR (translated in Izvestiya Academy of Sciences USSR, Atmospheric and Oceanic Physics, 1972, pp. 225-229).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Broadband antennas does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Broadband antennas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Broadband antennas will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3495855

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.