Radar Timing and Geometry
A guide to pulse repetition interval, unambiguous range, radar horizon, and range resolution, with an emphasis on what each quantity limits or enables in a radar system.
Enter the required engineering values to calculate unambiguous range with standard RF and radar relationships.
Inputs
This topic also has a deeper guide and a printable reference pack, so you can move from the live answer into the method, assumptions, and worked examples without leaving the topic cluster.
A concise printable guide covering PRI, unambiguous range, range resolution, and radar horizon for quick reference during study and system planning.
A compact worked-examples pack for PRI, unambiguous range, and range-resolution problems, with notes on how changing one timing choice affects the others.
These are the main values the calculator uses. Keep the units consistent and, where relevant, match the assumptions explained in the related guide.
Unit: Hz
Enter the value using the unit shown on the field.
Use this page when you need a quick unambiguous range estimate for RF, radar, or communications planning.
These calculators follow standard engineering formulas. Real antennas, propagation conditions, clutter, and implementation losses can produce different real-world results.
Estimate received power from transmitter power, antenna gains, distance, and frequency using the free-space Friis relationship.
Use the Pulse Repetition Interval Calculator for quick pulse repetition interval estimates in RF, radar, and communications work.
Use the Radar Range Resolution Calculator for quick radar range resolution estimates in RF, radar, and communications work.
Estimate the line-of-sight radar horizon from antenna height and target height using a standard engineering approximation.