CM square/halo Folded dipole based on a sketch on a facebook group
CM Modelled by Roger Walker, GW6HRU
CE
SY F=145.0	'Centre frequency
SY H=6		'Height above ground
SY R=0.003	'Wire radius = 6mm diam
SY V=1.046	'Raditating element length (vs wavelength)
SY C=0.02	'Corner cutoff X/Y dist
SY G=0.059984	'Gap between ends
SY M=0.059986	'Matching point
SY I=0.03+2*R	'Input length
SY CC=sqr(2)*C		'Corner cutout X/Y length
SY CLL=(V/2)*299.792458/F	'1/2 Wavelength
SY CTL=CLL+G		'Length + Gap
SY CLS=(CTL+8*C-4*CC)/4	'Side/Side width (allowing for gap and corners)
GW	1	1	0		0	H	0		I	H	R	'Feed point
GW	10	8	0		I	H	(CLS/2)		M	H	R	'Matching stub	
GW	20	8	0		0	H	((CLS/2)-C)	0	H	R	'Near right
GW	21	1	((CLS/2)-C)	0	H	(CLS/2)		C	H	R	'Near right corner
GW	22	1	(CLS/2)		C	H	(CLS/2)		M	H	R	'Right side - to matching point
GW	23	15	(CLS/2)		M	H	(CLS/2)		CLS-C	H	R	'Right side - matching point to far corner
GW	24	1	(CLS/2)		CLS-C	H	((CLS/2)-C)	CLS	H	R	'Right left corner
GW	25	7	((CLS/2)-C)	CLS	H	G/2		CLS	H	R	'Far right
GW	30	8	0		0	H	-((CLS/2)-C)	0	H	R	'Near left
GW	31	1	-((CLS/2)-C)	0	H	-(CLS/2)	C	H	R	'Near left corner
GW	32	16	-(CLS/2)	C	H	-(CLS/2)	CLS-C	H	R	'Left side
GW	33	1	-(CLS/2)	CLS-C	H	-((CLS/2)-C)	CLS	H	R	'Far left corner
GW	33	7	-((CLS/2)-C)	CLS	H	-G/2		CLS	H	R	'Far left
GE	0
LD	5	0	0	0	58000000
GN	-1
EK
EX	0	1	1	0	1	0	0	' Feed in middle of input element
FR	0	0	0	0	145.0	0
EN