At the point when one is connecting different microwave parts and frameworks, one of the additional difficult inquiries is picking the right coaxial gathering. SMA links are accessible that cover a similar recurrence range yet the expense might fluctuate from $10 to $200. This article will attempt to make sense of tradeoffs in the decision of different link congregations.
At the point when the framework engineer initially picks a connector type, he’ll think about numerous factors. Assuming the recurrence is beneath 6ghz, mcx, mmcx, bnc’s turn out great. For higher frequencies, Sma’s, 2.92’s, 2.4’s. For high power the connector of decision may be the may be the 7/16 or SC. In associating with these ports, connectors are a choice, however they ought to be a final retreat; VSWR cooperations happen with even the best microwave coaxial connectors. So when one purchases a link for interconnects, attempt to constantly involve a similar connector as the thing you’re connecting. Additionally attempt to involve a similar grade of connector on the link as on the framework; metal SMA to metal SMA, tempered steel SMA to treated steel SMA.
So which is the best link for you application, the $10 or $200 one? Think about these tradeoffs:
Metal SMA’s keep going for 100 interconnects; heat shrink connectors tempered steel SMA’s keep going for 500 interconnects. More extravagant connectors are certainly worth an expanded speculation for an application with many mates/demates, while cheaper connectors might be fine when one needs to connect a framework once. Note that suggested force can shift even in a connector series when the material changes; don’t involve 8 in-lbs on metal Sma’s! Microwave test links will utilize hardened steel Sma’s.
The essential crude link can cost a link maker $0.1/ft for RG58, and a few bucks a foot for low misfortune truly adaptable link. For low frequencies short lengths of RG58 are fine; as the recurrence as well as length of link increment, the more expensive links become essential.
Twist sweep: Thick, adaptable links types sell at a robust premium. A curve span of under an inch frequently requires premium link.
Heat Psychologist: safeguards the connector/link interface. Higher grade links, for example, test links frequently offer additional intensity Psychologist for additional insurance.
Coat material can offer additional security to the link gathering.
Shield: safeguards the link from misuse, decisively expands the value, and is frequently expected for outside applications.
Stage security: In stage matched frameworks, premium links are accessible with little stage change over temperature, or little stage change as the link is twisted.
VSWR and Impedance precision: 2:1 VSWR links are accessible and modest, 1.25:1 are still sensibly estimated, 1.05:1 will cost! Tight VSWR requires a crude link with exceptionally exact impedance, quality connectors to keep 50 ohms, and accuracy gathering of the connector to the link, frequently requiring shims/spaces/unique devices.