Flux-flow-type Josephson oscillator for millimeter and submillimeter wave region. II. Modeling

Journal Article · Sat Dec 01 04:00:00 EST 1984 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.333849· OSTI ID:6355135

Nagatsuma, T; Enpuku, K; Yoshida, K; Irie, F

A theoretical study is made of a travelling-wave-type oscillator, which utilizes a flux flow in a long Josephson junction for use as a local oscillator in the integrated superconducting receiver system. An internal electromagnetic field of the oscillator junction in the flux-flow state is investigated both numerically and analytically. It is shown that the voltage amplitude of the internal oscillation increases gradually in the direction of the flux flow and reaches a maximum value at the junction end. An equivalent circuit of the oscillator is also obtained, which gives dependences of the emitted radiation on frequency, magnetic field, and load. It is shown that the output power attains the value of the order of 10/sup -6/ W in the frequency range between 100 and 500 GHz, and that the output power and the radiation frequency can be controlled by both the bias voltage and the applied magnetic field. These theoretical results explain quantitatively the experimental ones with a Pb-alloy long junction of length 24 lambda/sub J/.

• Research Organization: Department of Electronics, Kyushu University 36, Fukuoka 812, Japan
• OSTI ID: 6355135
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 56:11; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
ANALYTICAL SOLUTION
CURRENTS
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
ELECTROMAGNETIC FIELDS
ELECTROMAGNETIC RADIATION
ELECTRON TUBES
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
FAR INFRARED RADIATION
FREQUENCY RANGE
GHZ RANGE
GHZ RANGE 100-1000
INFRARED RADIATION
JOSEPHSON JUNCTIONS
JUNCTIONS
LEAD ALLOYS
MAGNETIC FIELDS
MATHEMATICAL MODELS
MICROWAVE EQUIPMENT
MICROWAVE RADIATION
MICROWAVE TUBES
NUMERICAL SOLUTION
ONE-DIMENSIONAL CALCULATIONS
OSCILLATORS
POWER
RADIATIONS
SUPERCONDUCTING DEVICES
SUPERCONDUCTING JUNCTIONS
TRAVELLING WAVE TUBES