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A phase‐conjugating pair of coupled, dual‐gate, self‐oscillating mixers
Author(s) -
Christodoulou Michael G.,
Chrissoulidis Dimitrios P.
Publication year - 2005
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.21081
Subject(s) - microwave , phase shift module , electrical engineering , electronic mixer , signal (programming language) , phase (matter) , coupling (piping) , port (circuit theory) , physics , engineering , leakage (economics) , optoelectronics , phase noise , harmonic mixer , telecommunications , computer science , local oscillator , mechanical engineering , quantum mechanics , programming language , economics , macroeconomics
A novel phase conjugator for active retro‐directive operation is made by using twin, dual‐gate, self‐oscillating mixers mutually locked through a 12‐dB hybrid coupler. The coupling network incorporates the load of both oscillators. Reduced LO penetration is achieved at the IF port in two steps: (i) by trapping the LO signal within the dc bias lines of each self oscillating mixer and (ii) by the out‐of‐phase addition of any LO signal leakage. The input RF signal leaking through the mixers has also been suppressed by out‐of‐phase addition at the IF port. The measured results are presented for a phase conjugator designed for nominal operation at 900 MHz. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 47: 59–62, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21081