Title :
Design of cryogenic (4.2 K) X-band HEMT oscillator for Josephson voltage standard
Author :
Moon-Que Lee ; Sangwook Nam ; Kyung-Whan Yeom ; Kyu-Tae Kim
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
A new oscillator configuration for a Josephson voltage standard is proposed and designed by a novel method. An analytic design procedure is presented for six general configurations of oscillators with two loads. The power splitting relationship between two loads is derived with respect to the reactive (lossless) embedding element. A HEMT oscillator is designed in X-band for the Josephson voltage standard and tested at room and cryogenic temperatures. There is a significant improvement in C/N ratio if it is operated at cryogenic temperature (4.2 K).
Keywords :
HEMT circuits; Josephson effect; cryogenic electronics; hybrid integrated circuits; measurement standards; microwave integrated circuits; microwave oscillators; superconducting junction devices; voltage measurement; 4.2 K; Josephson voltage standard; analytic design procedure; cryogenic X-band HEMT oscillator; hybrid MIC; lossless embedding element; power splitting relationship; reactive embedding element; Coupling circuits; Cryogenics; Frequency; HEMTs; Josephson junctions; Microwave oscillators; Power generation; Temperature; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Microwave Symposium Digest, 1998 IEEE MTT-S International
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-4471-5
DOI :
10.1109/MWSYM.1998.705169
