will this rf power detecting circuit will work in 400 Mhz to 900 Mhz frequency band ?

will this rf power detecting circuit will work in 400 Mhz to 900 Mhz frequency band (diode :BAT85)??
here is the circuit

<a title="detector.JPG" href="http://ee.mweda.com/uploadfile/2020/0326/20200326024916301.jpg"><img src="../imgqa/eboard/EM/EM-xkrurjc2jnx.jpg" alt="detector.JPG" /></a>
http://ee.mweda.com/uploadfile/2020/0326/20200326024916301.jpg

what do you want to detect (1 mV, 100 mV, 2 V, etc)? Whether you will measure something depends on what you use as antenna and the strength of the field.

BAT85 is not the best Schottky diode for a simple UHF detector. Try to find a schottky diode with less capacitance. A very nice detector diode is BAT62 as it has a good breakdown voltage and low capacitance.

I would reduce C1 to 1... 10 nF and use a DVM with high input resistance (> 1 MOhm).