TRANSCEIVER WITH CLOSED LOOP CONTROL OF ANTENNA TUNING AND POWER LEVEL
摘要
A trainable transceiver for learning and transmitting an activation signal that includes an RF carrier frequency modulated with a code for remotely actuating a device, such as a garage door opener. The trainable transceiver preferably includes a controller, a signal generator, and a dynamically tunable antenna having a variable impedance that may be selectively controlled in accordance with a detector circuit signal. The detector circuit provides a measurement of the transmission power and is also used to vary the applied transmission power of the transceiver in response to operating and environmental parameters.
申请公布号
WO0075905(A1)
申请公布日期
2000.12.14
申请号
WO2000US40159
申请日期
2000.06.07
申请人
JOHNSON CONTROLS INTERIORS TECHNOLOGY CORP.;BLAKER, DAVID;CARDWELL, MATTHEW;DUCKWORTH, PAUL;HONECK, BRIAN
发明人
BLAKER, DAVID;CARDWELL, MATTHEW;DUCKWORTH, PAUL;HONECK, BRIAN