RF Power Sensors

RF power sensors are transducer devices that convert RF and microwave signal power into a measurable DC or low-frequency voltage, which is then processed by a power meter or analyzer. They are available in multiple technologies — thermocouple, diode, and calorimetric — each suited to different power ranges, frequency bands, and accuracy requirements. Modern USB power sensors can operate as standalone instruments without a separate meter mainframe, simplifying bench and field setups considerably.

Power sensors are indispensable in wireless communications, satellite systems, radar, and electronics manufacturing, where accurate knowledge of signal power is essential for performance and regulatory compliance. Directional sensors additionally measure reflected power and return loss, making them valuable for characterizing antenna systems and RF transmission lines across broadcasting, cellular, and defense applications.

Typical Applications

In-line power measurement in RF transmission lines and antenna feed systems
Transmitter and amplifier output characterization during production test
Noise figure measurement as part of Y-factor method test setups
Reflected power and VSWR monitoring in broadcasting transmitters
Waveform-specific power correction for OFDM, LTE, and pulsed radar signals

Popular Brands

Bird Technologies is a leading manufacturer of directional power sensors widely used in two-way radio, broadcasting, and cellular infrastructure. Keysight Technologies offers diode and thermocouple sensors covering frequencies up to 110 GHz with high dynamic range. Rohde & Schwarz and Anritsu provide sensors matched to their respective power meter platforms for fully integrated measurement solutions.