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A miniaturized unit cell for ultra-broadband active millimeter-wave frequency multiplication

: Lewark, U.J.; Diebold, S.; Wagner, S.; Tessmann, A.; Leuther, A.; Zwick, T.; Kallfass, I.


IEEE transactions on microwave theory and techniques 62 (2014), No.6, pp.1343-1351
ISSN: 0018-9480
Journal Article
Fraunhofer IAF ()
GaAs frequency multipliers; microwave and millimeter- wave devices and circuits; millimeter-microwave and millimeter-wave integrated circuits; microwave monolithic integrated circuit (MMIC) multipliers; III-V devices

A compact broadband unit cell for the design of broadband frequency multipliers is presented. Based on design methods from moderate frequencies, a novel integrated balanced field-effect transistor architecture is introduced, pushing ultra-broadband balanced frequency multiplication into the high millimeter-wave range. The realized microwave monolithic integrated circuits (MMICs) using this topology provide second harmonic generation over several decades using only a single integrated transistor unit cell. The circuits are fabricated in a metamorphic HEMT technology for convenient integration into multifunctional MMICs and achieve relative bandwidths of 199% from 60 MHz to 80 GHz and 70.1% in D-and G-band (110-170 and 140-220 GHz).