Southwest Microwave has developed miniature microwave coax contact assemblies that fit into the small, standard size 20 contact cavities of D-subminiature connectors and also size 20 (and larger) contact cavities for standard MIL-DTL-38999 circular connectors.
Called SSBP-20, they can be used interchangeably with non-coax signal contact assemblies. Applications range from airborne to medical and test, from missile and space to mobile communications. The parts are resistant to vibration (tested to 2000 Hz, random and sine, at 150°C) and shock (tested 3 axes, 100 G), yet can be installed with simple plastic tools.
Although targeted for miniaturised packaging benefits, the interface is 0,9 mm which permits economical use at both RF and extreme millimetre-wave applications and combinations thereof in the same connector.
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If you look across the broader electromagnetic spectrum, the selection of the 3 kHz to 300 GHz frequency range for RF signals is a result of a balance between propagation characteristics, data transmission requirements, regulatory allocations, and the compatibility of electronic components and devices.
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