|
|
本帖最后由 Xuxingfu 于 2012-6-9 19:44 编辑
" L/ _) b; \" l( L' {# _6 D ?/ p* h, u
资用功率增益圆: c7 Z# m& N! I: Y: e
ga_circle(), C2 w& V- a0 n
Generates an available gain circle.8 B# u* K7 V0 \# D
" r( H# }) e' B" j语法规则Syntax:
/ C7 u4 C: U9 b. Q' u$ B/ V6 R! I; Y' G5 I' F# ~& B7 f. T/ w& o
y = ga_circle(S, gain, numOfPts, numCircles, gainStep)! r# u) p2 {* q9 x7 K* J5 g5 f# Y* _
s A. `0 Q. ]9 g; n9 Z' D
4 _) P4 n q7 k5 V6 w+ J9 E( X9 w, c/ |6 Q
Default value for gain is min(max_gain(S)) - {1, 2, 3}8 j' a" K1 ?: p0 ~2 s x' c
2 u) a3 d$ s1 p9 U+ x+ i) @Examples! \* ?# Y, M$ C& i8 q
circleData = ga_circle(S, 2, 51)
$ g7 q+ Z; y* K% y6 K0 BcircleData = ga_circle(S, {2, 3, 4}, 51) return the points on the circle(s).! G5 ] Q y& s1 C+ F9 @
circleData = ga_circle(S, , 51, 5, 0.5) return the points on the circle(s) for 5 circles at maxGain - {0,0.5,1.0,1.5,2.0}6 ?8 y z# B! K5 }4 f9 m
circleData = ga_circle(S, , , 2, 1.0) return the points on the circle(s) for 2 circles at maxGain - {0,1.0}& [9 D2 x7 {1 ^; e
$ I5 W, s, F" |$ {4 h此功能用于在小信号S参数模拟。
6 e- e! M5 Y9 M3 c' w4 h函数生成常数资用增益圆源不匹配造成的,圆的定义在指定的增益源反射系数点。+ u; ?0 O+ I: Y3 N# ~3 P
% q2 O& x7 s! {+ m4 xThis function is used in Small-signal S-parameter simulations.
% a* Q6 F. K$ W& R2 qThe function generates the constant available-gain circle resulting from a source mismatch. The circle is defined by the loci of the source-reflection coefficients resulting in the specified gain. ! S9 c6 h9 Q K
, x8 ^3 z$ d. n7 E" W* |2 v
A gain circle is created for each value of the swept variable(s). Multiple gain values can be specified for a scattering parameter that has dimension less than four. This measurement is supported for 2-port networks only. 0 t3 i7 l, Q9 Y0 N7 \- y
If gain and numCircles are not specified, gain circles are drawn at min(max_gain(S)) - {0,1,2,3}. That is, gain is calculated at a loss of 0,1,2,3 dB from maxGain.
- Z9 e O& s4 f0 _6 y8 p8 _2 W' X" E
! f+ N/ X# }# ~/ ~If gain is not specified and numCircles is given, then numCircles gain circles are drawn at gainStep below max_gain(). Gain is also limited by max_gain(S). That is, if gain > max_gain(S), then the circle is generated at max_gain(S)., M" ~+ H" \/ t8 V: i/ x
/ |' w1 W. |( u9 ~圆方程:
2 @; t& J# R1 j9 D/ w6 f0 n* v$ |6 F# J; ^
" X; z: j# {/ O
: g# {# B( I7 s
|
|