Wireless microphone

Details Wireless microphone Wireless microphone

1980-07-31

1982-08-10

Bookbinder, Marc E.

Telecommunications

Transmitter

Mobile or portable

343702, 455127, 455128, H04B 1034, H04B 104

Patent

active

043441840

ABSTRACT:
A wireless microphone which does not require a separate antenna. A wireless microphone in the form of an elongate housing of nonelectrical conducting material with a microphone unit mounted in one end of the housing and a battery and control switch mounted in the other end of the housing. A first electrical circuit including an audio amplifier and a second electrical circuit including a radio frequency amplifier are mounted in the housing physically separated from each other and interconnected by radio frequency chokes. The output of the radio frequency amplifier is connected to circuit ground of the audio amplifier, with the microphone unit and first circuit serving as one radiator of a dipole and with the battery and second circuit serving as the other radiator of the dipole.

REFERENCES:
patent: 2828413 (1958-03-01), Bowers
patent: 3564416 (1971-02-01), Price

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