(42S) FRIIS - Solving Friis radio transmission equation

[Emilio Abud Filho]

Dear All

Program to solve the "Friis transmission equation", which calculates the power found at the receiving antenna port, as a function of the transmitted power, antenna gains and the distance between them; (to be used with "HP Solver" built-in application).

Attachments:

- Program documentation, including example, math equations, how to use explanations, source code, etc; (xlsx and pdf)

- RAW format file (zip)

- An up-dated documentation form (v5)

Code:


00 { 93-Byte Prgm }
01 LBL "FRIIS"
02 MVAR "PTX"
03 MVAR "PRX"
04 MVAR "GTX"
05 MVAR "GRX"
06 MVAR "FREQ"
07 MVAR "DIST"
08 RCL "PTX"
09 RCL+ "GTX"
10 RCL+ "GRX"
11 23857325.9695
12 RCL÷ "DIST"
13 RCL÷ "FREQ"
14 LOG
15 20
16 ×
17 +
18 RCL- "PRX"
19 END

Warm regards,