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The 80420A from Giga-tronics is a Power Sensor with Frequency 10 MHz to 18 GHz, Power Range -57 dBm to +30 dBm, Max Input Power +30 dBm (1 W). More details for 80420A can be seen below.
TVAC compliant USB and LAN Power Sensor
You can now find similar products from multiple companies on everything RF.