Title :
2.8 dB conversion gain broadband HBT-HEMT balanced frequency tripler with high harmonic suppression
Author :
Guan-Yu Chen ; Hong-Yeh Chang ; Shou-Hsien Weng ; Yue-Ming Hsin ; Yu-Chi Wang
Author_Institution :
Dept. of Electr. Eng., Nat. Central Univ., Jhongli, Taiwan
Abstract :
A 10.2-12.6 GHz balanced heterojunction bipolar transistor (HBT)-high electron mobility transistor (HEMT) frequency tripler is presented. A pair of common-base/common-emitter HBTs is used to generate in-phase and out-of-phase harmonics. Two bandpass filters are utilised as matching networks to enhance the harmonic suppression. A common-gate/common-source HEMT active balun is employed to combine the third harmonic in-phase and provide conversion gain. The proposed frequency tripler shows a conversion gain of 2.8 dB, a fractional bandwidth of 21.2% and a fundamental suppression higher than 47 dB.
Keywords :
baluns; band-pass filters; frequency multipliers; harmonic generation; harmonics suppression; heterojunction bipolar transistors; high electron mobility transistors; microwave field effect transistors; BPF; band-pass filter; common-base/common-emitter HBT; common-gate-common-source HEMT active balun; conversion gain broadband HBT-HEMT balanced frequency tripler; frequency 10.2 GHz to 12.6 GHz; gain 2.8 dB; harmonic suppression; heterojunction bipolar transistor; high electron mobility transistor; in-phase harmonics generation; matching network; out-of-phase harmonics generation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2014.0678
