Communications: radio wave antennas – Antennas – With radio cabinet
Patent
1996-06-10
2000-02-29
Wimer, Michael C.
Communications: radio wave antennas
Antennas
With radio cabinet
343713, 455 90, 455575, 379 551, H01Q 124, H04B 726
Patent
active
060314923
ABSTRACT:
A cradle unit for use in transmitting radiocommunication signals from within a vehicle between a portable phone unit inside a vehicle and an external antenna connected to an exterior of the vehicle is provided with a heat sink for dissipating heat generated at the cradle unit, wherein the heat sink also functions as a dipole antenna for communicating with the portable phone. In addition, the cradle unit can be provided with circuitry for charging a battery of the portable phone, along with a hands-free unit, including a speaker and microphone. The heat sink antenna allows the portable phone to receive and transmit radio frequency signals as if it were directly RF-coupled to the external antenna, thereby avoiding a 10 dB attenuation loss normally associated with using a portable phone inside a vehicle due to the RF shielding of the metal vehicle body.
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Article: Carant Literature; Inventor: Carant Antenna B; Title Antenna Technique, Antenna Installation; 1995; pp. 1-45.
Griffin Lee Daniel
Hayes Gerard James
Ericsson Inc.
Wimer Michael C.
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