Broadband low noise parametric amplifier

Details Broadband low noise parametric amplifier Broadband low noise parametric amplifier

1974-11-05

1977-06-14

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

With impedance matching

330 49, 333 82B, 333 98R, H03F 704, H01P 120, H01P 502, H01P 508

Patent

active

040300498

ABSTRACT:
The specification discloses a low noise parametric amplifier for use with a radar receiver. A Gunn diode oscillator is provided to generate a pump frequency. A bandpass filter filters the pump frequency and applies the pump power through a waveguide having a reduced height portion employing a multisection Chebycheff transformer. A coaxial signal input line connects through the waveguide to a coaxial idler section which is provided to terminate the signal input line and to match the signal and idler frequencies. A varactor diode assembly is mounted on the center conductor of the signal input line and the idler section. A cup member is attached to the diode assembly for matching the parallel resonance of the diode assembly to the pump frequency.

REFERENCES:
patent: 3596204 (1971-07-01), Vane
patent: 3836872 (1974-09-01), Yu et al.

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