The letter describes the use of a moulded microwave SQUID which has been used to calibrate a high-precision waveguide-beyond-cutoff (w.b.c.o.) r.f. attenuator with an accuracy of 0.0024 dB (s.d.).
Inspec keywords: superconducting devices; calibration; attenuators; waveguide components
Other keywords:
Subjects: Superconducting devices; Waveguide and microwave transmission line components
References
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- Kamper, R.A., Simmonds, M.B., Adair, R.T., Heor, C.A.: `Quantum mechanical measurments of RF attenuation', IEEE catalogue 72 CHO 682-5 TABSC, Proceeding of applied superconductivity conference, 1972, Annapolis, USA, p. 696–699.
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2)
- Adair, R.T., Simmonds, M.B., Hoer, C.A., Adair, R.T.: `Measurement of RF power and attenuation using SQUIDS', NBS Technical Note 643, 1973.
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3)
- R.T. Adair , M.B. Simmonds , R.A. Kamper , C.A. Hoer . RF attenuation measurements using quantum inteference in superconductors. IEEE Trans. , 375 - 378
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4)
- R.A. Kamper , M.B. Simmonds . Broadband superconducting quantum magnetometer. Appl. Phys. Lett. , 270 - 277
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5)
- Petley, B.W., Morris, K., Yell, R.W., Clarke, R.N.: `The use of a SQUID for the measurement of RF attenuation', DES-32, NPL Report, 1976.
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6)
- Yell, R.W.: `Development of a high precision WBCO attenuator', CPEM, 1972, p. 108–110, IEEE catalogue 72, CHO 630-4-PREC.
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- D. Pascal , M. Sauzade . Experimental determination of optimum operating conditions of a supercoducting inteferometer. J. Appl. Phys. , 3085 - 3090
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http://iet.metastore.ingenta.com/content/journals/10.1049/el_19760182
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content/journals/10.1049/el_19760182
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