CM Helix over perfect ground
CM Illustrates use of GH (helix) input
CM Illustrates use of GM (move wires) input
CE
SY f=432	'Input Frequency MHz
SY k=308.756	'Input Velocity constant ~300 Mm/s
SY w=k/f	'Calculate Wavelength in space
SY hw=0.5*w	'Calculate Half wavelength in space
SY t=3	'Input Number of helix turns
SY ts=18	'Input Segments per helix turn
SY n=t*ts	'Calculate Segments total
SY wl=0.5	'Input Antenna height in wavelengths
SY l=wl*w	'Calculate Antenna height in meters
SY s=l/t	'Calculate Turn spacing in meters
SY r=sqr(hw*hw-s*s)/2/PI	'Calculate Helix radius in meters
SY d=.0025	'Input Wire radius in meters
SY h=2	'Input Height above ground in meters
GH	1	n	s	l	r	r	r	r	d
GM	0	0	0	0	0	0	0	h	0
GE	1
LD	5	0	0	0	58000000
GN	1
EK
EX	0	1	n/2	0	1.	0	0
FR	0	0	0	0	f	0
EN