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The following worksheets require the use of  Mathcad software by Mathsoft, Inc. Save the file using the supplied name, then open it in Mathcad to perform the calculations. |
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Design
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har-lep.mcd (31 k Mathcad file):
This worksheet calculates the transfer curve of a Schottky diode detector (without matching circuit, zero frequency) at any temperature. It is based upon the work of Harrison & LePolozec.
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largesig.mcd (32 k Mathcad file):
Large signal version of har-lep.mcd, useful for the design of detectors which operate over the range of -15 to +20 dBm (such as AGC circuit detectors).
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pi_attn.mcd (86 k Mathcad file):
Calculates attenuation and return loss vs. bias voltage for three versions of the 4-diode Pi attenuator described in  Application Note 1048.
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p_diss.mcd (25 k Mathcad file):
Calculates the junction temperature of a diode, given the ambient temperature, DC bias current, RF power dissipated in the diode, diode and package type.
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Characterization
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pin_char.mcd (23 k Mathcad file):
Calculates the two APLAC parameters (n and Is) from four pairs of forward V-I data. Also calculates Rs, needed to plot the V-I curve using pin_vi.mcd.
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pin_vi.mcd (22 k Mathcad file):
Plots the forward V-I curve of a PIN diode, given n, Is and Rs.
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schottky.mcd (28 k Mathcad file):
Plots the V-I curve for any Schottky diode at any temperature. Calculates maximum safe current.
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sch_char.mcd (24 k Mathcad file):
This worksheet is used to characterize a Schottky diode (series resistance, ideality factor, saturation current), given five V-I data pairs.
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zbs_char.mcd (26 k Mathcad file):
Characterizes the junction resistance and junction capacitance of a zero bias Schottky diode.
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General
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_g_to_z.mcd (19 k Mathcad file):
Converts S11 or complex reflection coefficient to complex impedance.
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_z_to_g.mcd. (19 k Mathcad file):
Converts complex impedance to S11 or complex reflection coefficient.
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r_and_c.mcd (33 k Mathcad file):
Calculates series or shunt resistance or capacitance, given a value of attenuation and frequency.
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