DUAL ANTENNA ARRANGEMENT FOR PORTABLE TRANSCEIVER

摘要

An antenna arrangement for a portable transceiver is disclosed as including a printed circuit antenna mounted on the transceiver and coupled to be driven by circuitry of the transceiver. An extendable monopole antenna is also mounted on the transceiver and is adapted to be electrically coupled to the printed circuit antenna when in an extended position and to be electrically decoupled from the printed circuit antenna when in a retracted position. A connector is fixedly attached to the printed circuit antenna at a first end and maintains contact with the monopole antenna at a second end as the monopole antenna slides between the extended and retracted positions. The monopole antenna includes a conductive portion which is in contact with the connector in the extended position and a non-conductive portion which is in contact with the connector in the rectracted position. A separate circuit may be provided for sensing the position of the monopole antenna, where the circuit permits the transceiver to transmit at full power when the monopol antenna is in the extended position and permits the transceiver to transmit at reduced power when the monopole antenna is in the retracted position.