Microwave co-axial connectors

In a microwave communication system, we have to minimize multimodal propagation, erratic reflection co-efficient, power loss and signal distortion. For this one option is to limit the circumference of the coaxial cable to one wavelength. There exist 7 types of microwave coaxial connectors. APC-3.5 stands for Amphenol Precision Connector-3.5 which was developed and marketed by Hewlett-Packard. This connector has a very low voltage standing-wave ratio with operational frequency upto 34 GHz. HP’s modified version APC-7 with very low VSWR and can go up to 18 GHz. Bayonet Navy Connector (BNC) is good upto 4 GHz and is advisable for an operation below 1 GHz. Sub Miniature A (SMA) connector is an higher order mode connector. Sub Miniature C (SMC) connectors are manufactured by Sealectro Corporation and is best for operation upto 7 GHz. Threaded Navy connectot (TNC) is actually a threaded BNC. Type N coonector has extremely low VSWR. Some companies which manufacture these types of connectors are Hewlett-Packard, Amphenol, Bendix Scintilla Corporation, Omni spectra Inc., Sealectro Corporation and Aayurtech solutions.