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59 lines
1.6 KiB
Python
59 lines
1.6 KiB
Python
# IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES. VOL 42, NO 2. FEBRUARY 1994
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# Conversions Between S, Z, Y, h, ABCD, and T Parameters which are Valid for Complex Source and Load Impedances
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# Dean A. Frickey, Member, EEE
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# Tables I and II
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import numpy as np
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from two_port_conversions import *
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""" Testing """
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# Analog Devices - HMC455LP3 - S parameters
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# High output IP3 GaAs InGaP Heterojunction Bipolar Transistor
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# MHz S (Magntidue and Angle (deg))
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# 1487.273 0.409 160.117 4.367 163.864 0.063 115.967 0.254 -132.654
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s11 = 0.409 * np.exp(1j * np.radians(160.117))
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s12 = 4.367 * np.exp(1j * np.radians(163.864))
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s21 = 0.063 * np.exp(1j * np.radians(115.967))
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s22 = 0.254 * np.exp(1j * np.radians(-132.654))
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s_orig = np.array([[s11, s12], [s21, s22]])
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# Data specified at 50 Ohms (adding small complex component to test conversions)
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z1, z2 = 50 + 0.01j, 50 - 0.02j
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z0 = np.array([z1, z2])
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""" Conversions """
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print(f'Original S: \n{s_orig}\n')
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# S --> Z --> T --> Z --> S
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z = s_to_z(s_orig, z0)
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t = z_to_t(z, z0)
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z = t_to_z(t, z0)
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s = z_to_s(z, z0)
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print(f'Test (S --> Z --> T --> Z --> S): \n{s}\n')
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# S --> Y --> T --> Y --> S
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y = s_to_y(s_orig, z0)
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t = y_to_t(y, z0)
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y = t_to_y(t, z0)
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s = y_to_s(y, z0)
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print(f'Test (S --> Y --> T --> Y --> S): \n{s}\n')
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# S --> H --> T --> H --> S
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h = s_to_h(s_orig, z0)
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t = h_to_t(h, z0)
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h = t_to_h(t, z0)
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s = h_to_s(h, z0)
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print(f'Test (S --> H --> T --> H --> S): \n{s}\n')
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# S --> ABCD --> T --> ABCD --> S
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abcd = s_to_abcd(s_orig, z0)
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t = abcd_to_t(abcd, z0)
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abcd = t_to_abcd(t, z0)
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s = abcd_to_s(abcd, z0)
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print(f'Test (S --> ABCD --> T --> ABCD --> S): \n{s}\n')
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