A 22-GHz-band low-noise down-converter for satellite broadcast receivers

A simple low-cost and high-performance 22 GHz band down-converter developed for a direct-to-home satellite broadcasting system is discussed. The down-converter consists of a low-noise high electron mobility transistor (HEMT) preamplifier, an image recovery mixer with a particular structure using die...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 1991-06, Vol.39 (6), p.993-999
Main Authors: Imai, K., Nakakita, H.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Dielectrics
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Frequency
Gallium arsenide
HEMTs
Microwave FETs
Microwave oscillators
MODFETs
Preamplifiers
Resonator filters
Satellite broadcasting
Signal convertors
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Summary:A simple low-cost and high-performance 22 GHz band down-converter developed for a direct-to-home satellite broadcasting system is discussed. The down-converter consists of a low-noise high electron mobility transistor (HEMT) preamplifier, an image recovery mixer with a particular structure using dielectric resonator filters, a 21.4 GHz GaAs FET oscillator stabilized by a dielectric resonator, and an IF amplifier. These components are fully integrating using microwave integrated circuit technology into a small size. A total noise figure of less than 2.8 dB is obtained over the 22.5-23.0 GHz frequency range. The local oscillator achieves a frequency variation of less than 600 kHz/sub p-p/ over a temperature range of -20 degrees to +60 degrees C.< >
ISSN:0018-9480
1557-9670
DOI:10.1109/22.81669