RF Adapters
RF Adapters
RF adapters are passive two-port components used to mate incompatible RF connector types in test and measurement systems. They allow engineers to connect instruments, cables, and devices under test that use different connector interfaces — such as SMA to Type-N, APC-7 to SMA, or BNC to SMA — without degrading signal integrity. A high-quality RF adapter maintains controlled 50 Ω impedance, low voltage standing wave ratio (VSWR), and minimal insertion loss across the intended frequency range, which can extend from DC to 18 GHz or beyond for precision lab-grade components.
RF adapters are essential in VNA calibration setups, where they extend the measurement reference plane or adapt calibration standards to different port connectors. In field testing, compact adapters allow technicians to quickly reconfigure cable assemblies for different equipment. Precision adapters from Keysight and Anritsu are characterized for calibration-grade applications where insertion loss and phase response must be accurately known.
Typical Applications
- Mating APC-7 calibration standards to Type-N or SMA instrument ports in VNA calibration
- Adapting signal generator outputs to different device connector configurations in conducted testing
- Converting between connector genders (male/female) in RF test fixture assemblies
- Field adaptation of cable assemblies to antenna connectors during site testing and commissioning
- Extending the usable connector interface range of spectrum analyzers and signal analyzers
Popular Brands
Keysight Technologies manufactures a comprehensive range of precision RF adapters covering DC to 18 GHz and above, including APC-7 to Type-N and various SMA configurations for its instrument ecosystem. Anritsu supplies precision adapters for its VNA and cable/antenna analyzer product lines. Huber+Suhner, Rosenberger, and Pasternack also offer extensive catalogs of RF adapters for laboratory and field applications.
