发明名称 |
ELECTRONIC MEANS OF SWITCHING ANTENNAS TO A COMMON BUS |
摘要 |
F.N. 44188 CAN 7A 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.
|
申请公布号 |
CA2019017(A1) |
申请公布日期 |
1991.01.28 |
申请号 |
CA19902019017 |
申请日期 |
1990.06.14 |
申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
WHITTINGTON, MARK |
分类号 |
H01Q3/24;H01Q21/30;(IPC1-7):H03K17/56;H01Q21/28;H01Q23/00 |
主分类号 |
H01Q3/24 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|