Filter tuning device and tuning plate including a number of such

Details Filter tuning device and tuning plate including a number of such Filter tuning device and tuning plate including a number of such

1998-05-28

2000-08-29

Pascal, Robert

Wave transmission lines and networks

Resonators

Cavity resonator

333235, 333207, 333209, H01P 1205, H01P 706

Patent

active

061114847

ABSTRACT:
The present invention relates to a tuning device in radio filter equipment for mobile telephony in which one or more cavities in the equipment should be tuned to the right frequency. The invention also relates to a tuning plate including a number of such tuning devices. The tuning device preferably includes regular or square formed depressed parts in the tuning plate. The depressed part converges each to a square formed central plate which is provided with an elevation or bulb. By turning a tuning screw on the equipment a force is developed on the plate and the surrounding depressed parts. This implies that the tuning can be made automatically, more secure and with less risk for intermodulation.

REFERENCES:
patent: 2415962 (1947-02-01), Okress
patent: 2562323 (1951-07-01), Martin
patent: 3121205 (1964-02-01), Foss
patent: 3213393 (1965-10-01), Powell et al.
patent: 3798565 (1974-03-01), Jechart
patent: 3885239 (1975-05-01), Zaleski
patent: 5028896 (1991-07-01), Kuokkanen
patent: 5781080 (1998-07-01), Ando
patent: 5825267 (1998-10-01), Smith

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