Title :
A miniature broad-band pHEMT MMIC balanced distributed doubler
Author :
Deng, Kuo-Liang ; Wang, Huei
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
4/1/2003 12:00:00 AM
Abstract :
A miniature broad-band balanced frequency doubler has been designed to operate from 30 to 50 GHz. It comprises a reduced-size 180° rat-race hybrid and two distributed doublers to form a balanced doubler configuration. The balanced distributed doubler suppresses the 180° out-of-phase fundamental and third harmonic signals at the output port while combining the in-phase second harmonic signal. A measured conversion loss of 5-7 dB from 30- to 50-GHz output frequencies is achieved with fundamental and third harmonic signals rejection better than 13 and 25 dB, respectively. The chip size is only 1.5×1 mm2.
Keywords :
HEMT integrated circuits; MMIC frequency convertors; frequency multipliers; losses; millimetre wave frequency convertors; 30 to 50 GHz; 5 to 7 dB; balanced distributed doubler; broad-band pHEMT MMIC; chip size; conversion loss; frequency doubler; in-phase second harmonic signal; out-of-phase fundamental signals; output port; rat-race hybrid; third harmonic signals; Diodes; FETs; Frequency; HEMTs; Impedance matching; Loss measurement; MMICs; Microwave oscillators; PHEMTs; Semiconductor device measurement;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2003.809665
