Electronic means of switching antennas to a common bus

Details Electronic means of switching antennas to a common bus Electronic means of switching antennas to a common bus

H - Electricity

03

K

351/60

H03K 17/56 (2006.01) H01Q 3/24 (2006.01) H01Q 21/28 (2006.01) H01Q 23/00 (2006.01)

Patent

CA 2019017

F.N. 44188 CAN 7A Abstract of the Disclosure 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.

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