Antenna radiotelephone patents

Dual antenna radiotelephone systems including an antenna-management matrix ...

Filed: April 30th, 1997 [Granted]

Patent Number: 6021317

Another object of the present invention is to provide dual antenna radiotelephones and associated methods of operation which more fully exploit the ...

Mobile radio telephone device with a detachable adapter for external power ...

Filed: December 12th, 1989 [Granted]

Assignee: Mitsubishi Denki Kabushiki Kaisha

Patent Number: 5121504

Numeral 3 is a separate antenna to be mounted on the radio telephone device body , connects mounted on the body 1 in plate of the portable antenna the ...

Retractable antenna system with switchable impedance matching

Filed: May 6th, 1998 [Granted]

Assignee: Ericsson Inc

Patent Number: 5923297

RETRACTABLE ANTENNA SYSTEM WITH SWITCHABLE IMPEDANCE MATCHING FIELD OF THE INVENTION The present invention relates generally to 5 radiotelephones, and, ...

Transmitter having adjustable power levels responsive to the position of a ...

Filed: May 11th, 1992 [Granted]

Assignee: Motorola Inc

Patent Number: 5815820

Thus, if the portable radiotelephone is ringing while the antenna 213 is retracted an the antenna 213 is extended, the incoming call is answered.

Antenna assembly

Filed: May 14th, 1998 [Granted]

Assignee: Motorola Inc

Patent Number: 6064341

One particular element of a radiotelephone is an antenna. Radiotelephones having a retractable compound antennas are known in the art.

ANTENNA FOR RADIO TELEPHONE

Filed: July 26th, 1999 [Pending]

Patent Application Number: 9360657

SUMMARY OF THE INVENTION [0025] The present invention was developed with the foregoing in view, and is intended to provide an antenna for a radio telephone ...

Retractable radiotelephone antennas with extended feeds

Filed: December 31st, 1997 [Granted]

Assignee: Ericsson Inc

Patent Number: 6097934

1 RETRACTABLE RADIOTELEPHONE ANTENNAS WITH EXTENDED FEEDS FIELD OF THE INVENTION The present invention relates generally to 5 radiotelephones, and, ...

Paging antenna and radiotelephones incorporating same

Filed: May 6th, 1999 [Granted]

Assignee: Ericsson Inc

Patent Number: 6259897

1 PAGING ANTENNA AND RADIOTELEPHONES INCORPORATING SAME FIELD OF THE INVENTION The present invention relates generally to radiotelephones and, ...