Receiving circuit for converting signals comprising at least two

Details Receiving circuit for converting signals comprising at least two Receiving circuit for converting signals comprising at least two

1985-06-03

1987-11-03

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455327, 455333, 455315, 455318, 331117D, 333204, H04B 126

Patent

active

047047399

ABSTRACT:
A signal converter comprises a filter formed of a first ferromagnetic resonator which supplied with an input signal that is to be converted and produces a filtered signal having a first frequency, a local oscillator formed of an active element and a second ferromagnetic resonator connected to the active element, produces an oscillating signal having a second frequency, a mixer receives and mixes the filtered signal and oscillating signal and produces a converted signal, the first ferromagnetic resonator is formed of a first ferrimagnetic crystal, a microstrip line magnetically coupled to the ferrimagnetic crystal and a first D.C. bias magnetic field means which applies a first D.C. bias magnetic field to the first ferrimagnetic crystal, the second ferromagnetic resonator is formed of a second ferrimagnetic crystal, a second microstrip line is magnetically coupled to the second ferrimagnetic crystal, and a second D.C. bias magnetic field means which applies a second D.C. bias magnetic field to the second ferrimagnetic crystal. The first and second ferrimagnetic crystals are composed of ferrimagnetic thin films such as YIG film formed by a thin film forming technique, such as liquid phase epitaxial growth.

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patent: 4553264 (1985-11-01), Hasegawa et al.
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