Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
62 (1993), S. 3195-3197
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
An integrated receiver consisting of two Josephson flux-flow oscillators and a superconductor-insulator-superconductor (SIS) mixer has been used to measure the linewidth of the oscillators. The oscillators are coupled to the SIS mixer using two centerfed interdigital capacitors, one of which with a fairly weak (−20 dB) coupling. By biasing the two oscillators (a few microvolt apart) on their velocity matching steps, the two resulting oscillations (280–330 GHz) were mixed in the SIS mixer. The difference frequency was amplified and detected on a spectrum analyzer. The combined linewidth of the two oscillators was 2.1 MHz throughout the band. The calculated available power incident on the SIS mixer was 430 nW at 320 GHz. The rf power from the oscillators, which could be tuned by changing the current bias, is high enough to pump the SIS mixer optimally.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.109127
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