Vol. 20

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2011-02-09

A Broadband Doubly Balanced Monolithic Ring Mixer with a Compact Intermediate Frequency (IF) Extraction

By Yi-Chang Lee, Chih-Ming Lin, Shih-Han Hung, Chun-Chi Su, and Yeong-Her Wang
Progress In Electromagnetics Research Letters, Vol. 20, 175-184, 2011
doi:10.2528/PIERL10120904

Abstract

To meet the requirements for broadband operation, high port-to-port isolation, and miniature chip area, a doubly balanced monolithic microwave ring mixer with an advanced IF extraction fabricated using 0.15 μm GaAs pHEMT process is presented. A miniature Marchand-like spiral balun with low-pass filter is used to extract IF signals and maintain balun performance simultaneously. The low-pass filter can filter out both the RF and LO signals. This miniaturized mixer design can mitigate layout complexity, improve port-to-port isolations suitable for ultra-broadband Ku-, K-, and Ka-band applications. Subsequently, the LO/RF-to-IF isolations are greater than 43.2 and 32 dB from 11 to 40 GHz, respectively. The LO-to-RF isolation is between 26.9 and 50.7 dB within the same swept range. The conversion loss is 7.2-12.4 dB within the operating bandwidth.

Citation


Yi-Chang Lee, Chih-Ming Lin, Shih-Han Hung, Chun-Chi Su, and Yeong-Her Wang, "A Broadband Doubly Balanced Monolithic Ring Mixer with a Compact Intermediate Frequency (IF) Extraction," Progress In Electromagnetics Research Letters, Vol. 20, 175-184, 2011.
doi:10.2528/PIERL10120904
http://www.jpier.org/PIERL/pier.php?paper=10120904

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