In geometry, coaxial means that two or more three-dimensional linear forms share a common axis. Thus, it is concentric in three-dimensional, linear forms. A coaxial cable, as a common example, is a three-dimensional linear structure. It has a wire conductor in the centre (D), a circumferential outer conductor (B), and an insulating medium called the dielectric (C) separating these two conductors. The outer conductor is usually sheathed in a protective PVC outer jacket (A). All these have a common axis. The dimension and material of the conductors and insulation determine the cable's characteristic impedance and attenuation at various frequencies. In loudspeaker design, coaxial speakers are a loudspeaker system in which the individual driver units radiate sound from the same point or axis. A coaxial weapon mount places two weapons on [roughly] the same axis – as the weapons are usually side-by-side or one on top of the other, they are technically par-axial rather than coaxial, however the distances involved mean that they are effectively coaxial as far as the operator is concerned. External links
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RF connectors (coaxial)
7/16 DIN APC-7 BNC Belling-Lee connector C F-type FME Hirose U.FL Hirose W.FL IPX Motorola MCX Microdot MMCX N QLS QMA/QN RCA SHV SMA SMB SMC TNC TV aerial plug UHF / Mini-UHF
Variations and alternate names 10-32 2.9 mm (SMA) 7 mm AMC (UFL) IPEX MHF RP-SMA RP-TNC SnapN Triax / Triaxial Twin BNC / Twinax (BNC)
Old or seldom used
See also Audio and video connectors Audio and video interfaces and connectors Radio freque