(42) T3dB - Reflector antenna 3dB beamwidth

[Emilio Abud Filho]

Dear All

4th order approximation equation for solving the reflector antenna 3dB beamwidth, based on the antenna diameter, antenna efficiency and operating frequency; to be used with "HP Solver" built-in application.

Attachments:

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

- RAW format file (zip)

Code:


00 { 147-Byte Prgm }
01 LBL "T3dB"
02 MVAR "FREQ"
03 MVAR "DIAM"
04 MVAR "N%"
05 MVAR "TETA3dB"
06 RCL "N%"
07 100
08 ÷
09 STO "NN"
10 CLST
11 RCL "NN"
12 4
13 Y↑X
14 15.512
15 ×
16 RCL "NN"
17 3
18 Y↑X
19 110.36
20 ×
21 -
22 RCL "NN"
23 X↑2
24 202.43
25 ×
26 +
27 RCL "NN"
28 170.1
29 ×
30 -
31 91.742
32 +
33 299792400
34 RCL÷ "FREQ"
35 ×
36 RCL÷ "DIAM"
37 2
38 ×
39 RCL- "TETA3dB"
40 END

Warm regards,