Matching circuit for a pre-amplifier of SHF band television sign

Details Matching circuit for a pre-amplifier of SHF band television sign Matching circuit for a pre-amplifier of SHF band television sign

1982-08-09

1985-01-01

Gensler, Paul

Wave transmission lines and networks

Coupling networks

With impedance matching

330277, 330286, H01P 508

Patent

active

044918097

ABSTRACT:
A matching circuit for a pre-amplifier of an SHF band television signal receiver is disclosed. The matching circuit comprises a stub line arranged near a gate terminal of an FET, and a pair of stub lines connected to a transmission line, one being a stub line exhibiting a short circuit impedance at a lower frequency than operating frequencies of the matching circuit and the other being a stub line arranged oppositely to the stub line and exhibiting a short circuit at a higher frequency than the operating frequencies. A distance between the stub line and the pair of stub lines is selected to be approximately equal to 1/4 wavelength of a center frequency of the desired signal band.

REFERENCES:
patent: 3662294 (1972-05-01), Jacobs et al.
patent: 3940706 (1976-02-01), Stegens
patent: 4053842 (1977-10-01), Turski et al.
patent: 4320353 (1982-03-01), Sasaki
Medley, Jr., et al., Broad-Band GaAs FET Amplifier Design Using Negative-Image Device Models, IEEE Trans. on MTT, Sep. '79, 330-386.

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