Linear Technology has a 40MHz to 6GHz dual channel, matched RMS power detector, offering over 55dB isolation at 2.14GHz.

In RF power amplifier (PA) applications, the LTC5583 provides a simple solution for accurately measuring forward power, reverse power, and voltage standing wave ratio (VSWR).

The device comprises a pair of 60dB dynamic range RMS detectors that are matched to 1.25dB.

This provides accurate RF power measurement of high crest-factor signals such as those used in LTE, WiMAX, W-CDMA, TD-SCDMA and CDMA2000 3G or 4G basestations and other high-performance radios employing complex modulation waveforms.

Each channel can detect signals accurately from as small as -58dBm to 2dBm, in a log-linear response with a typical linearity of better than +/-0.5dB covering all cellular frequency bands.

At higher frequencies, the device is capable of providing 47dB of useful dynamic range up to 6GHz. Each detector simultaneously tracks the envelope of the modulated input waveform, providing on-chip capability to measure both peak and average signal power.

The LTC5583 has best-in-class channel-to-channel isolation of over 55dB at 2.14GHz, when driven differentially. The LTC5583 can operate single-ended for RF input frequencies up to 2.14GHz, requiring no external balun transformers.