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本帖最后由 Xuxingfu 于 2012-6-9 19:44 编辑 1 K( n8 o$ v# w; A C d
5 a$ R# U% h9 e, c: j2 t资用功率增益圆：, r+ s9 i1 z, K
ga_circle()
9 ]. u* \7 o& q4 I+ [Generates an available gain circle.
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0 ~1 c( S A5 P5 l9 P) D. u: q语法规则Syntax：' L; x; X9 @; V1 u! M
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y = ga_circle(S, gain, numOfPts, numCircles, gainStep)
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0 u, V: J6 z) f2 z" XDefault value for gain is min(max_gain(S)) - {1, 2, 3}6 j, ~, o0 u7 ~/ r1 r# J7 h7 b
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Examples
8 H9 r/ Q0 X! f7 i6 t+ h$ n3 g- qcircleData = ga_circle(S, 2, 51): Z/ p5 z( A) z0 e( ~: i8 @3 c
circleData = ga_circle(S, {2, 3, 4}, 51) return the points on the circle(s).5 M3 R1 N/ z) i
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}
9 ]4 _6 r/ x- xcircleData = ga_circle(S, , , 2, 1.0) return the points on the circle(s) for 2 circles at maxGain - {0,1.0}0 _, c6 x* k9 U
7 g: h# d6 r2 C; M. C6 ]7 A此功能用于在小信号S参数模拟。
4 y- g0 C# _/ `/ a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。
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This function is used in Small-signal S-parameter simulations.8 @' B: i1 M% S) \8 b
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.
) h# ]. T/ j3 j2 [7 \6 @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.
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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 T9 m' P9 S. u" I/ ^1 c& |( f& j圆方程：
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发表于 2012-3-24 10:45
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发表于 2012-3-24 13:55
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