Accessory RF unit for hand-held wireless telephone systems

Details Accessory RF unit for hand-held wireless telephone systems Accessory RF unit for hand-held wireless telephone systems

1996-10-08

1998-12-29

Vo, Nguyen

Telecommunications

Transmitter and receiver at same station

Having particular housing or support of a transceiver

455575, 455129, 343702, H04B 138

Patent

active

058549706

ABSTRACT:
An accessory RF unit, used in combination with a hand-held wireless phone, is designed to raise the antenna of the phone above the user's head such that shadowing effects caused by the user's head or body are minimized during phone operation. The accessory RF unit is placed over an existing radiating element of the phone and the communication signals originating in the phone are electromagnetically coupled to an accessory antenna within the accessory RF unit. Similarly, communication signals originating from a base station can be received by the phone. The accessory RF unit is easily attached and removed without the need for additional tools or the removal of an exiting antenna as part of the wireless phone. A coil circumferentially surrounds the phone's antenna for bidirectionally coupling RF energy from and to the accessory antenna.

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"The ARRL Handbook for the Radio Amateur", American Radio Relay League, Newington,CT, 61st Ed. 1990, pp. 2-17-2-19, 3-1-3-5.

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