|
Freq=[10e6::1e6::75e6] : [ ~) w. q8 `
b1=2e-5 * o9 ^$ k5 E( V' I. w8 J z4 `" B
b2=1.1e-10
( u1 q. }9 D/ E V3 |8 g& o7 Xb3=3.2e-20
6 t# U9 ], V* f+ X: ob4=1.2e-40 ! p+ A1 Z# N" r3 E H( t
e=2.71828 9 V; J" c+ R8 e% }
ILpcb(f)=0.3*[20*lg(e)*(b1*(power(f,1/2)+b2*(power(f,1)+b3*(power(f,2)+b4*(power(f,3)]
6 \1 n+ S6 v2 a7 V- ^0 U- v3 b; n1 D/ E8 a
A=12-2*POWER(f,1/2)
! _: t! T- ^8 z$ ]# q% x- y- I- [' aB=6.3-13*lg(f/5.5) ) t4 P$ [9 I- ^6 O/ ^5 J
RL=if(freq<4.1)then a else b
7 G1 c: A$ p. g5 ^' l/ N$ ~, H3 L) N( {1 G; r, e$ k
3 @' I4 y& e3 }
可以参照这个写 |
|