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ASME's Mechanical Engine…ing Toolkit 1997 December
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HELICAL.DOC
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HELICAL - A Helical Resonator Design Program for MS-DOS
By Vincent G. Heesen
MICROCOM Corp.
965 Thomas Drive
Warminster, Pa. 18974
-Disclaimer-
This software has been released to the public domain by the author.
It may be freely passed on to others so long as no charge is made -
save for a modest copying charge.
Although this program is believed to work as described, no warranty
of performance is made for this software.
-History-
"Helical" was developed to fill the need for a quick and accurate
determination of the physical dimensions and feasibility of a Helical
Resonator filter design. Originally published in the July 1985 issue
of RF Design and written for the TI-99/4A computer this, the second
version, has been written for the IBM-PC and compatibles employing
MS-DOS 2.1 .
-Description-
Equipped with the following inputs: operating frequency, resonator
impedance, number of poles and impedance of the output tap, "Helical"
will yield: coil length, coil diameter, wire diameter (min & max),
number of turns, wire spacing, shield diameter or square shield width
(= 20% of dia.), shield length, unloaded Q, tap location and insertion
loss of up to seven poles of Butterworth response.
-References-
1. Macalpine,W.W. and Schildkenecht,R.O. Coaxial Resonators with
Helical Inner Conductors Proceedings of the IRE, Vol. 47, No. 12
P.2100, December, 1959
2. Zeverev,A.I. Handbook of Filter Synthesis, John Wiley & Sons, N.Y. 1967