(42) TNULL Reflector antenna radiation pattern 1st null

[Emilio Abud Filho]

Dear All

4th order approximation equation for solving the reflector antenna radiation pattern 1st null position, 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 { 144-Byte Prgm }
01▸LBL "TNULL"
02 MVAR "FREQ"
03 MVAR "DIAM"
04 MVAR "N%"
05 MVAR "TNULL"
06 DEG
07 RCL "N%"
08 100
09 ÷
10 STO "NN"
11 CLST
12 RCL "NN"
13 4
14 Y↑X
15 5.3967
16 ×
17 RCL "NN"
18 3
19 Y↑X
20 19.547
21 ×
22 -
23 RCL "NN"
24 X↑2
25 26.749
26 ×
27 +
28 RCL "NN"
29 18.006
30 ×
31 -
32 6.6268
33 +
34 299792400
35 ×
36 RCL÷ "DIAM"
37 RCL÷ "FREQ"
38 ASIN
39 RCL- "TNULL"
40 END

Warm regards,