The LTC®5597 is a high accuracy RMS power detector that provides a very wide RF input bandwidth, from 100 MHz up to 70 GHz. This makes the device suitable for a wide range of RF and microwave applications, such as point-to-point microwave links, SATCOM, instrumentation, military radio, Wi-Fi, LTE/5G and power control applications. The DC output voltage of the detector is an accurate representation of the average signal power applied to the RF input, independent of input waveforms with different crest factors such as CW, WCDMA and OFDM (LTE and Wi-Fi) signals. The response is linear-in-dB with 28.5 mV/dB logarithmic slope over a 35 dB dynamic range with typically better than ±1 dB accuracy. The LTC5597 can measure signals down to -37 dBm, about 10 dB better than any Schottky device which can save the expense of an amplifier in the signal path. It has ±2 dB flat frequency response up to 60 GHz, enables accurate measurement of very broadband signals and minimizes need for calibration (single frequency may be sufficient). The LTC5597 evaluation board uses a 5 mils thick layer of Rogers RO3003 material for the top substrate to achieve low dielectric losses up to 7 GHz.
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