I have built a power meter with AD8318, a chip which contains a logarithmic amplifier, often used for power measurements.
I have read its datasheet and it is written that the maximum input power is equal to 12 dBm.
I do not know exactly which kind of measures I can do with this limits, but it correspondes to 15.85mW, which I think is quite low for many applications. Precisely, I wanted to use it to measure power from wifi networks, bluetooth, mobile network and radio stations.
So I need some advices about if it is necessary to buy a RF attenuator to put between the antenna and the power meter (with 50 Ohm SMA coaxial cable) and how many dB of attenuation I need for these applications. Since I am not an expert of rf attenuators, if you think I should consider other parameters for choosing an attenuator, tell me!