Mode of use and assessment of precision coaxial connectors

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Abstract
It is shown that full use can be made of the special properties of precision coaxial connectors, which allow the use of certain precise methods of impedance measurement, only when the body of each connector, together with half the contact impedance between the two parts of a connector pair, is considered to form part of the apparatus to which the connector is attached. Lack of uniformity among the contact impedances of different pairings of connectors requires the measurement of average contact impedance separately from the effects of other imperfections in the connectors, so that an uncertainty on this account can be determined.The transmission properties of a connector pair, regarded as a component, are of importance in so far as they can affect the wide-band properties of the apparatus to which the connectors are attached. A simple method of measuring these properties is described, which requires only a good slotted line with the usual ancillary apparatus: a sensitive dial gauge for the measurement of small displacements and lengths of precision coaxial line.The measurement of leakage from a connector pair is not included because this has already been described.

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