At 437 MHz, which connector shall be the most suitable for use from among the following:1. BNC Connector2. Type-C Connector3. Type-N Connector4. TNC Connector5. SMA Connector6. APC-7 Precision ConnectorPlease keep in mind that my desired frequency is 437 MHz only, while most of them work even in Microwave region.So, I need to consider only those properties of these cables which are beneficial at around 437 MHz, say upto 1-1.5 GHz.Like APC-7 shows very little reflection even at very high microwave frequencies. However Type-N also gives pretty good performance at 437 MHz. So, which one should I go for- Type N or APC-7 at 437 MHz?Taking cue from the above example, kindly tell me the best connector from the ones mentioned above with concise reasoning(no need for detailed explanation!). Please consider the maximum properties possibleALSO IF THERE IS SOME CONNECTOR WHICH PERFORMS BETTER THAN THE ONES MENTIONED ABOVE, THEN PLEASE TYPE IT IN YOUR ANSWER.I will be extremely grateful to all those who answer.:)
Type-N will be the most suitable. These connectors work well at frequencies extending into several GHz. Moreover they show extremely low SWR at 437 MHz. Also, they are threaded connectors. So, there will be very low air dielectric loss. Apart from these, N-type is slightly moisture resistant, can handle high power and also are leakage resistant at RF. Most importantly, it needs simple manual screwing action to fix these connectors into the coax! BNC are extremely lossy at 437 MHz especially because they are non-threaded connectors and so will produce dielectric losses. Type-F connectors are usually used in TV connections. APC-7 is undoubtedly the best among these but the job will be very well done by N-type at 437 MHz.
at those frequencies, N and TNC are the most popular however it depends on the application SMA are low cost, low power APC-7 are low power high $ F (cable TV) connectors (cheap ones) are OK till 1000 MHz, good ones till 3 GHz, much better stability than BNC it depends on the application Anita
no connector is perfect. You need to trade off cost versus specifications, and you need to know your exact requirements before you can write a specification. Items like reflections, VSWR, mechanical strength, method used to attach the wire, impedance discontinuities, power handling capability, high voltage breakdown, corrosion resistance, and many others. Look at MIL-C-39012 for a typical specification. If you have no specs and just want to pass 437 MHz, any will do. .
I personally would use N type. They are more able to keep water out, in an outdoor situation.
