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17 lines
783 B
Plaintext
17 lines
783 B
Plaintext
$NetBSD: patch-aa,v 1.2 2004/11/30 00:27:35 dmcmahill Exp $
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fixes minor bug in the computation. Correct constant (0.7913) found in original reference
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for this model.
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--- src/c_microstrip.c.orig Thu Jul 25 19:48:39 2002
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+++ src/c_microstrip.c
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@@ -520,7 +520,7 @@ static void er_eff_freq(c_microstrip * c
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er_eff = c_ms->er_eff_o_0;
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P_8 = 0.7168 * (1.0 + 1.076 / (1.0 + 0.0576 * (er - 1.0)));
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- P_9 = P_8 - 0.7193 * (1.0 - exp(-pow(f_n / 20.0, 1.424))) * atan(2.481 * pow(er / 8.0, 0.946));
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+ P_9 = P_8 - 0.7913 * (1.0 - exp(-pow(f_n / 20.0, 1.424))) * atan(2.481 * pow(er / 8.0, 0.946));
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P_10 = 0.242 * pow(er - 1.0, 0.55);
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P_11 = 0.6366 * (exp(-0.3401 * f_n) - 1.0) * atan(1.263 * pow(u / 3.0, 1.629));
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P_12 = P_9 + (1.0 - P_9) / (1.0 + 1.183 * pow(u, 1.376));
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