Formulas & Data:
- Electronics
- Mathematics
- Physics
- RF & Microwaves

Parts Vendors:
- all hand-selected

- Amateur Radio
- Vintage Articles:
- Electronics World
- Popular Electronics
- QST
- Radio & TV News
- Radio Craft
- Short Wave Craft
- Wireless World

- Events Calendar
RF Cafe Homepage
Copyright 1999-2015   •−•  ••−•    −•−•  •−  ••−•  •   "RF Cafe" in Morse Code  >> Listen to It <<
- EW & Radar Handbook
- Quizzes       - Software
- App Notes
- Calculators
- Advertise on RF Cafe
- About RF Cafe™
- RF Cafe Shirts & Mugs
- RF Cafe Archives
RF Cafe Book Contest
- RF Cafe on Visit RF Cafe on Facebook Visit RF Cafe on Twitter Visit RF Cafe on LinkedIn
- Tech Humor
- Forums Archive
- Job Board
- Donate to RF Cafe
- Kirt's Cogitations
Custom Search
More than 10,000 searchable pages indexed.
Greetings: There is so much good stuff on RF Cafe that there is no way to list or link to all of it here. Please use the Search box or the Site Map to find what you want - there is a good chance I have it. Thanks!

Radar Equation, 2-Way

These are the tried & true radar equations used for decades. Transmitter power, target distance and radar cross-section (RCS) are used along with free-space loss (Friss equation), and antenna gains to calculate the power that arrives at the input of the receiver. These equations cover both monostatic (transmitter and receiver in same location) and bistatic (transmitter and receiver in different locations).

Click here for an online calculator.
Monostatic (Tx and Rx in same location)
Radar equation formula monostatic bistatic - RF Cafe Radar equation formula monostatic bistatic - RF Cafe
Bistatic (Tx and Rx in different locations)
Radar equation formula monostatic bistatic - RF Cafe Radar equation formula monostatic bistatic - RF Cafe
Keep all units consistent.
 
Losses due to atmospheric absorption and antenna polarization are not included.
where: Pr = Received peak power ( W )
Pt = Transmitted peak power ( W )
Gt = Gain of transmitter antenna ( ratio, not dBi )
Gr = Gain of receiver antenna ( ratio, not dBi )
λ = Transmitted wavelength ( m, cm, in, etc. )
σ = Radar cross-section of target - RCS ( m2, cm2, in2, etc. )
R = Range ( m, cm, in, etc. )
RTx = Transmitter range to target ( m, cm, in, etc. )
RRx = Receiver range from target ( m, cm, in, etc. )
c = speed of light



              Radar Applets: Pulse Repetition Frequency (PRF)
Monostatic Radar

Your RF Cafe
Progenitor & Webmaster

Click here to read about RF CafeKirt Blattenberger… single-handedly redefining what an engineering website should be.

View the YouTube RF Cafe Intro Video Carpe Diem!
(Seize the Day!)

5th MOB: My USAF radar shop

Airplanes and Rockets: My personal hobby website

Equine Kingdom: My daughter Sally's horse riding website