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本帖最后由 Xuxingfu 于 2012-6-9 19:44 编辑
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资用功率增益圆:9 b( i8 U0 O4 _) c
ga_circle()- f9 M8 l, ~. m' Z. ^2 K
Generates an available gain circle.
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; T$ [0 w% ~& h) n+ T语法规则Syntax:; D: n8 ^9 K' \; L7 Y$ T0 h
# o, I' U+ o# X4 K# m# B$ ~y = ga_circle(S, gain, numOfPts, numCircles, gainStep)& X! A( X- h& ?) g( T) K
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5 s7 J I' ^) @' @6 nDefault value for gain is min(max_gain(S)) - {1, 2, 3}
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Examples
5 Y5 C$ P2 U& k0 }& ] J- VcircleData = ga_circle(S, 2, 51)0 J5 X1 p" U% M1 I
circleData = ga_circle(S, {2, 3, 4}, 51) return the points on the circle(s). p. N% _! Y/ s$ E, V
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}
" r0 L: f( e$ r6 d) ]9 _+ H' ?circleData = ga_circle(S, , , 2, 1.0) return the points on the circle(s) for 2 circles at maxGain - {0,1.0}; a& ?' c7 ]8 |) [, z |( d. ^
3 ]5 `3 D' s9 z, J; d9 Q* C此功能用于在小信号S参数模拟。4 I) a! _1 u3 E* B
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。7 d- j( ?2 i7 ?4 u6 f
* S3 ~$ j: i- F% \1 m8 @This function is used in Small-signal S-parameter simulations.
8 R( p* ~' |% f0 S" L# ]The 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.
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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. $ a3 d8 B7 F1 w) [9 |) v$ m! |
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. - k1 X/ @2 m8 n* n+ t L. c. H
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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).
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4 Y% c \ ]; _) ]圆方程:
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