Title :
Design and stability test of a 2-40 GHz frequency doubler with active balun
Author :
van Raay, F. ; Kompa, G.
Author_Institution :
Fachgebiet Hochfrequenztech., Kassel Univ., Germany
Abstract :
An ultra-broadband PHEMT MMIC frequency doubler is designed. It comprises a FET active balun stage and a push-pull doubler in common-source configuration. Due to the purely lumped-element concept, the required chip area is very low. Using broadband compensation and matching networks, a nearly flat output power performance up to a limit of 2/3 f/sub T/ with acceptable conversion loss is predicted in circuit simulations and confirmed with broadband waveform measurements. The stability of the entire circuit is investigated including hidden instabilities and arbitrary passive input and output load conditions based on a direct stability circle calculation.
Keywords :
Baluns; Circuit stability; Field effect MMIC; Frequency multipliers; HEMT integrated circuits; Integrated circuit design; MMIC frequency convertors; 2 to 40 GHz; FET active balun; common-source configuration; compensation network; conversion loss; design; lumped element circuit; matching network; push-pull doubler; stability; ultra-broadband PHEMT MMIC frequency doubler; Circuit simulation; Circuit stability; FETs; Frequency; Impedance matching; MMICs; PHEMTs; Performance loss; Power generation; Testing;
Conference_Titel :
Microwave Symposium Digest. 2000 IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-5687-X
DOI :
10.1109/MWSYM.2000.862276
