Wide-band tuner having a temperature-compensated microstrip reso

Details Wide-band tuner having a temperature-compensated microstrip reso Wide-band tuner having a temperature-compensated microstrip reso

1982-10-25

1985-01-01

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455189, 455183, 455316, 455325, H04B 126

Patent

active

044919760

ABSTRACT:
A double-superheterodyne tuner for a television receiver comprises a tunable oscillator, a fixed oscillator, two mixer stages and a band-pass filter between the mixer stages, and operates at a GHz intermediate frequency between the mixer stages. The two oscillators and the bandpass filter each includes a microstrip line resonator formed in a dielectric body having substantially the same dielectric constant and dielectric constant temperature coefficient to each other, thereby compensating the variation of the resonant frequency in the resonator due to an ambient temperature variation.

REFERENCES:
patent: 4152669 (1979-05-01), Igarashi
patent: 4214212 (1980-07-01), Dipietromaria
patent: 4340975 (1982-07-01), Onishi et al.
patent: 4352209 (1982-09-01), Ma
"An MDS Down Converter of Thick-Film Mic for 2 GHz Pay TV", by Uwamo et al., 8/1981.

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