adam young said:

We are working on WiFi wireless transmit and receive products specification.

Can you tell me how best to understand :

1. the RF output transmit frequency vs power vs range

2. the receive frequency vs sensitivity vs range

What is the typical range estimates in outdoor open area and indoor offices?

Google "Friis equation." It's actually just a bit of algebraic manipulation

starting with the idea that power radiating into free space must fall off (in

density, W/m^2) with the square of distance... in free space. In The Real

World, you can demonstrate that there are worst case scenarions where power

falls off with the _cube_ of distance (ouch!); people doing link calculations

pick there favorite power, with 2.5 not being uncommon.

The way to think of free space attenuation is that each oscillation or

wavelength of a signal gets attenuated by a certain, constant amounts. Hence,

if you double the frequency, you halve the wavelength and double the

attenuation over a given distancedoubles as well.

---Joel Kolstad