A coaxial connector system for precision R.F. measuring instruments and standards

General design requirements are discussed for a coaxial connector system for precision r.f. impedance and admittance standards, bridges and measuring instruments of all types for frequencies up to 4 Gc/s. A description is given of a practical connector system which has been in use for many years at a Ministry of Aviation laboratory. The design is such that the connector system does not introduce uncertainties greater than about 3 parts in 104 in the admittance parameter. The residual parameters of the connector system, including the open-circuit and short-circuit conditions, are described and evaluated. Data relating to the discontinuity capacitances encountered in a practical measuring system are also given, together with formulae for the precise transformation of admittance between two planes in a uniform coaxial line.