calculates path loss, received power and receive threshold margin.
waiting for input
YOUR NEXT DISCOVERY STARTS HERE
A question, a new exploration.
sample parameters are ready. Run directly, or load your own data.
free space line of sight, far field, does not include rain attenuation, multipath and polarization losses, additional losses must be input by yourself.
Free-space Link Budget: uses and methods
calculates path loss, received power and receive threshold margin.
Applicable scope and calculation boundary
free space line of sight, far field, does not include rain attenuation, multipath and polarization losses, additional losses must be input by yourself.
model and reference method
FSPL=20log10(4πdf/c)
model version: 1.1.0. The results are used for scientific research, exploration and teaching, please interpret according to the model conditions.
input parameters
frequency（GHz）
Value range: 0.001 – 1000
distance（km）
Value range: 0.001 – 100000000
transmit power（dBm）
Value range: -100 – 100
transmit gain
Propulsion parameter estimation of（dBi）
Value range: -20 – 100
receiving gain（dBi）
Value range: -20 – 100
additional loss（dB）
Value range: 0 – 100
receiving threshold（dBm）
Value range: -200 – 50
How to use
Load the example or enter data that matches the field description.
Confirm units and models, run calculations and check diagnostics.
Export charts, tables or results packages and record model versions.
Industry Application · Independent Reproduction Example
Free-space Link Budget
satellite communications team evaluates the impact of antenna gain and distance on power headroom.
Public industry reference: MIT · Department of Aeronautics and Astronautics
The institution’s public research directions include: Orbital dynamics, space systems and aerospace control. This link serves as a portal for field background and extended learning.
Load the default example of Free-space Link Budget and check frequency、distance、transmit power and its units.
is calculated using FSPL=20log10(4πdf/c), and the results are compared after adjusting a single parameter.
checks applicable conditions and diagnostics, and exports numerical tables, charts, and model versions for review.
Deliverables
calculates path loss, received power and receive threshold margin. delivers parameter records, calculation charts, and reproducible JSON result packages.
needs to be checked before landing
free space line of sight, far field, does not include rain attenuation, multipath and polarization losses, additional losses must be input by yourself.。
case is compiled for public industry purposes, and the reproduction steps are independent examples of this site; it does not mean that the above-mentioned institutions use or endorse this site, nor does it cite customer benefits that have not been publicly verified.
The
SEE THE PRINCIPLE IN MOTION
scientific animation demonstration
Scroll to load calculation example…
FOLLOW THE RESEARCH
recommended by universities and research institutions
Aerospace
The following is the recommended reading order of this website organized by direction relevance, public research resources and learning portals. The number is the serial number recommended by the editor, not QS, THE or paper measurement ranking; it does not represent the overall strength of the institution.
Space missions, orbital operations and space debris research。
official website link accessibility check: 2026-10-03
catalog compiled on 2026-10-03. Link accessibility does not equate to verification of the latest papers, admissions, or program status; please check the institution's official website for specific research teams and opportunities.
CONNECTED SCIENCE
Connect knowledge with each other
Related disciplines and tools
In the initial calculation of
