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Design of novel balanced high-order subharmonic self-oscillating mixer

Design of novel balanced high-order subharmonic self-oscillating mixer

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The design of RF and millimetre-wave receivers demands low-cost features and compact architecture. Self-oscillating mixers (SOMs) are excellent choices for such a design as both the oscillating source and the mixer are combined in one single device. Moreover, subharmonic operation reduces LO frequency requirements and therefore opens up interesting perspectives for high-end millimetre-wave systems. A fully-balanced third-harmonic SOM structure is presented, operating at 5.8 GHz with high measured conversion gain (max. 8.75 dB) that is used as a frequency-scaled prototype for future millimetre-wave circuits. To the authors' knowledge, this is the first presentation of such a circuit structure.

References

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      • D.H. Evans . A millimetre-wave self-oscillating mixer using a GaAs FET harmonic-mode oscillator. IEEE MTT-S Int. Microw. Symp. Dig. , 601 - 604
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      • N. Siripon , K.S. Ang , M. Chongcheawchamnan , I.D. Robertson . Design and performance of a novel balanced self-oscillating mixer. Proc. 30th European Microwave Conf. , 16 - 19
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      • D. Higgins . Performance of self-oscillating GaAs MESFET mixers at X-band. Electron. Lett. , 23 , 605 - 606
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      • J. Morales , A. Suarez , E. Artal , R. Quere . Global stability analysis of self-oscillating mixers. Proc. 25th European Microwave Conf. , 1216 - 1219
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