Communications: radio wave antennas – Antennas – Switching between antennas and lines
Patent
1990-11-21
1992-01-28
Wimer, Michael C.
Communications: radio wave antennas
Antennas
Switching between antennas and lines
333103, 343742, 343867, H01Q 3240, H01Q 700
Patent
active
050847104
ABSTRACT:
A circuit for selecting an input to a signal processing network from among several switchable antenna units. Each antenna unit includes a winding which is connected to a common signal bus. The switchable antenna units may be placed in "on" or "off" states in response to a controller, such as a microprocessor. One terminal of each winding is connected to a transistor which causes the terminal to be in an open condition when the unit is unselected, attenuating any signal which might otherwise be transmitted to the signal bus. A second winding is inductively coupled to the first winding and is used to improve attenuation of unselected signals.
REFERENCES:
patent: 3840875 (1974-10-01), Neal
patent: 3893025 (1975-07-01), Humphreys, Jr.
patent: 4220913 (1980-09-01), Howell et al.
patent: 4295095 (1981-10-01), Thomas et al.
patent: 4343001 (1982-08-01), Anderson et al.
patent: 4387340 (1983-06-01), Peterman
patent: 4438389 (1984-03-01), De Sa
patent: 4499606 (1985-09-01), Rambo
patent: 4520317 (1985-05-01), Peterman
patent: 4542344 (1985-09-01), Darilek et al.
patent: 4656364 (1987-04-01), Yokogawa et al.
patent: 4843401 (1989-06-01), Bass
Brown Peter Toby
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Musgrove Jack V.
LandOfFree
Electronic means for switching antennas to a common bus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electronic means for switching antennas to a common bus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic means for switching antennas to a common bus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1863373