Defining RF Test Sockets:
The RF radio frequency test socket, a composite assembly, comprises a test socket shell, conventional probes, and an RF coaxial connector. While structurally akin to standard test sockets, its distinguishing feature is the coaxial connector, a critical element in RF testing. RF connectors, developed collaboratively by the global communications industry, have evolved into a specialized system with international standards, becoming an indispensable part of the connector field.
Working Principle:
RF test sockets typically employ pogo pin probes for conventional pins. Given the specialized medium required for RF signal transmission, the connector part is uniquely designed. The commonly used RF coaxial connector embeds within the test socket, facilitating RF conduction during tests.
When selecting RF connectors, a range of interfaces like BNC, TNC, SMA, SMB, SMC, N-type connector, MCX, MMCX, and BMA can be considered, each with distinct application areas and performance parameters, including frequency range, insertion loss, return loss, and contact impedance. Customization of test sockets requires specific requirements for insertion loss, return loss (S12/S21, S11), and contact impedance to be communicated to the supplier.

Application Scenarios:
In the era of advanced communication standards like 5G and WIFI6, RF chips are increasingly employed in mobile devices and communication base stations, escalating the demand for RF test sockets. These sockets, crucial in aging tests, functional tests, and extreme environment testing, face ever-growing requirements due to the heightened testing demands in RF applications.
Manufacturing RF Test Sockets:
Designing an RF test socket necessitates detailed data, encompassing chip dimensions, spacing, shape, test frequency, insertion loss, return loss, and more. For high-power RF chips, considering overcurrent requirements is essential since the test socket's pogo pin typically handles less than 1A. Therefore, the power pin's overcurrent capability must be factored in to ensure accurate testing.
Maintenance Protocols:
Regular maintenance is vital for RF test sockets. It's recommended to inspect the contact probe or RF connector under a microscope after every 5,000 uses, checking for dirt and wear to maintain optimal testing conditions. If dirt is detected, ultrasonic cleaning with high-purity alcohol, followed by air gun drying, is advised to ensure dryness and longevity of the test socket. Minor wear that doesn't impact test accuracy allows for continued usage post-cleaning. However, significant wear necessitating accuracy concerns requires probe and RF connector replacement.