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Design of double‐balanced MMIC mixer for Ka‐band satellite communications
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- Authors
- Keun-Kwan Ryu, Dong-Phil Jang, Moon-Que Lee, In-Bok Yom, Seong-Pal Lee
- Issue Date
- 2002-09
- Citation
- Microwave and Optical Technology Letters, v.34, no.6, pp.401-403
- ISSN
- 0895-2477
- Publisher
- Wiley
- Language
- English
- Type
- Journal Article
- Abstract
- A MMIC (monolithic microwave integrated circuit) mixer chip using the Schottky diode of an InGaAs/GaAs p-HEMT process has been developed to act as the receiver down converter of a Ka-band satellite transponder. A different approach to the MMIC mixer structure is applied for reducing the chip size by the exchange of ports between IF and LO. This MMIC covers with RF (30.6-31.0 GHz) and IF (20.8-21.2 GHz.) According to the on-wafer measurement, the miniature (3.0 × 1.5 mm) MMIC mixer demonstrates conversion loss below 7.8 dB, LO-to-RF isolation above 27 dB, LO-to-IF isolation above 19 dB, and RF-to-IF isolation above 40 dB, respectively.
- KSP Keywords
- Conversion loss, LO-to-RF isolation, Microwave monolithic integrated circuits(MMIC), down-converter, ka-band, microwave integrated circuit, on-wafer measurement, pseudomorphic high electron mobility transistor(pHEMT), satellite communication, schottky diode