Measurement of cosmic background radiation at 3.2-cm wavelength

Roll, P. G.; Wilkinson, David T.

doi:10.1016/0003-4916(67)90179-0

Cited by 13 publications

(1 citation statement)

References 16 publications

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“…The underlying approach explored in this work for baseline removal has its roots in a variety of analogous instruments such as frequency-swept reflectometry 25 and spectral baseline correction in radio astronomy. 26,27 In particular, the differential reflectometer configuration used for cavity characterization 28 provides insight in this context. In this method, the baseline is explicitly removed on resonance by comparing the response of a waveguide cavity with that of a short-circuit via the difference port of a magic-T power divider.…”

Section: Measurement Metrology Motivationmentioning

confidence: 99%

Analysis and calibration techniques for superconducting resonators

Cataldo

Wollack

Barrentine

et al. 2015

Review of Scientific Instruments

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A method is proposed and experimentally explored for in-situ calibration of complex transmission data for superconducting microwave resonators. This cryogenic calibration method accounts for the instrumental transmission response between the vector network analyzer reference plane and the device calibration plane. Once calibrated, the observed resonator response is analyzed in detail by two approaches. The first, a phenomenological model based on physically realizable rational functions, enables the extraction of multiple resonance frequencies and widths for coupled resonators without explicit specification of the circuit network. In the second, an ABCD-matrix representation for the distributed transmission line circuit is used to model the observed response from the characteristic impedance and propagation constant. When used in conjunction with electromagnetic simulations, the kinetic inductance fraction can be determined with this method with an accuracy of 2%. Datasets for superconducting microstrip and coplanar-waveguide resonator devices were investigated and a recovery within 1% of the observed complex transmission amplitude was achieved with both analysis approaches. The experimental configuration used in microwave characterization of the devices and self-consistent constraints for the electromagnetic constitutive relations for parameter extraction are also presented.

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Section: Measurement Metrology Motivationmentioning

confidence: 99%