Radiation shield for cellular telephones

Details Radiation shield for cellular telephones Radiation shield for cellular telephones

1993-04-12

1997-03-18

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

455 90, 455117, 455128, 455129, 379 59, 379447, 379437, 343702, 343841, H04B 133

Patent

active

056132212

ABSTRACT:
A radiation shield for a hand-held cellular telephone is made up of a metal strip placed between the antenna rod of the telephone and the speaker. The strip has a flat body portion and an upper portion that is curved away from the rod. Overall length of the strip is slightly longer than the antenna rod, and its width is 1 to 1 1/2 inches. Radiation fields reaching the head of a user whose ear is placed near the speaker are substantially reduced by the shield.

REFERENCES:
patent: 4189730 (1980-02-01), Murdock
patent: 4654612 (1987-03-01), Smith
patent: 5335366 (1994-08-01), Daniels
Toriya, Michio, "A Portable Wireless Telephone Set", a translation copy of JP 57-92629 of Toritani May 1984.
Dynaspek, "Cell Shield", Feb's 1993, 10 pages attached.

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