Professional evaluation of RF connectors main specifications

I do not know how much you know about the main specifications of RF connectors, as an electronic components industry practitioners, purchasers, it is necessary to understand some of the basics of RF connector specifications. In general, how to evaluate the main specifications of RF connectors? For this problem, Huicheng yuan connector company engineers will answer for you in the following. Impedance: Almost all RF connectors and cables are standardized to 50Ω impedance. The exception to the general is the 75Ω system usually used for cable TV installations. It is also important that RF coaxial cable connectors have a characteristic impedance that matches the cable. If this is not the case, a discontinuity is introduced and losses can result. VSWR (Voltage Standing Wave Ratio): Ideally this should be unity, and good design and implementation can keep the VSWR below 1.2 in the range of interest. Frequency range: Most RF operations nowadays are in the range of 1 to 10 GHz, so connectors must have low losses in this region. For cases above 10 GHz - and there is a lot of work going on now in the 10 to 40 GHz range - there are newer connectors which are preferred. They are expensive, as are the cables themselves. Insertion Loss: This is the connector loss in the frequency range of interest. Losses are typically in the range of 0.1 and 0.3 dB. Determining how critical per watt (or fractional watt) is in most designs, even with such small losses, must be minimized and factored into the link loss budget. It is especially important in low-noise front ends when signal strength and signal-to-noise ratio are low. Runtime Cycles: How many connect/disconnect cycles can a connection endure and still meet its specifications? This is usually in the range of 500 or 1000 cycles. For threaded connectors, the tightening torque specified by the supplier is an important factor in maintaining performance and reliability. Power: Power handling is determined by two resistive losses (heating) and insulation breakdown. While even decades of design were dominated by pre-processing tens of watts, today's design community focuses on low-power devices such as cell phones, femtocell and femtocell base stations, video interfaces, RF and gadgets. These are in the sub-1W range, so connectors can be much smaller and their power ratings are much less constrained.

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