1999
DOI: 10.1109/77.783982
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Linewidth measurement of millimeter wave radiation from a Josephson array source coupled to free space

Abstract: Radiation from a linear array oscillator with a spiral antenna has been coupled out of the dewar through a Teflon window. Both its linewidth and its power have been measured after coupling the radiation through free space into a second dewar. The linewidth has been determined using a SIS mixer with a spiral antenna which was pumped with an 88 GHz phase-locked Gunn oscillator, and also by Josephson mixing of the array itself. The array oscillator has a distributed array structure of 300 resistively shunted junc… Show more

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Cited by 2 publications
(2 citation statements)
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“…Several types of Josephson one-dimensional (1D) and two-dimensional (2D) arrays have been proposed and studied [7][8][9][10][11][12][13][14][15][16][17][18]; most of them are based on overdamped Josephson junctions (JJs) with non-hysteretic current-voltage characteristics (IVCs). Series 1D arrays have been studied for many years; nowadays the most developed design combines compact groups of JJs placed in a microstrip transmission line with a distance of λ opt /2 [7][8][9][10][11][12]. A power as high as 0.85 mW has been detected in a matched load at an optimal (resonance) frequency of about 240 GHz [10].…”
Section: Introductionmentioning
confidence: 99%
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“…Several types of Josephson one-dimensional (1D) and two-dimensional (2D) arrays have been proposed and studied [7][8][9][10][11][12][13][14][15][16][17][18]; most of them are based on overdamped Josephson junctions (JJs) with non-hysteretic current-voltage characteristics (IVCs). Series 1D arrays have been studied for many years; nowadays the most developed design combines compact groups of JJs placed in a microstrip transmission line with a distance of λ opt /2 [7][8][9][10][11][12]. A power as high as 0.85 mW has been detected in a matched load at an optimal (resonance) frequency of about 240 GHz [10].…”
Section: Introductionmentioning
confidence: 99%
“…Radiation from the linear array oscillator was measured both by an integrated on-chip detector and by sensors outside the test cryostat. As a rule the maximum operation frequency of the 1D arrays was limited by plasma frequency and the LC resonance frequency of the shunt resistor (typically the maximum operation frequency was about 300 GHz [7][8][9][10]). To extend this limit up to 1 THz a new shunted junction with a small parasitic inductance of about 100 fH has been developed [11,12].…”
Section: Introductionmentioning
confidence: 99%