CM Universal Magnetic Loop Antenna NEC model by Carol F. Milazzo, KP4MD
CM Vertical orientation (using GH command)
CM http://www.qsl.net/kp4md/magloop.htm
CM Frequency = 7.050 MHz
CM Impedance 50 ohms
CM Both main loop and coupling loop are 18-side polygons
CM RG-8/U main loop
CM RG-58/U coupling loop
CM Simulated good ground
CE
SY frq=7.05	'frequency MHz
SY c=7.14e-11	'Input resonating capacitance
SY qc=2000	'Input resonating capacitor Q
SY d=6.5	'Input main loop diameter feet
SY r=0.5*d	'Calculate main loop radius
SY dia=0.4	'Input main loop wire dia. inches
SY rad=0.5*dia/12	'Calculate main loop wire radius feet
SY n=18	'Input n-polygon main loop
SY d2=1.416902	'Input coupling loop diameter feet
SY r2=0.5*d2	'Calculate coupling loop radius
SY dia2=0.19	'Input coupling loop wire dia. inches
SY rad2=0.5*dia2/12	'Calculate coupling loop wire radius feet
SY n2=18	'Input n-polygon coupling loop
SY h=12.00448	'Input height to loop
SY h2=0.757949	'Input separation from coupling loop feed point to top of main loop
SY ht3=r-r2-h2	'Calculate offset from main loop center to coupling loop center
GH	1	n	1e-300	1e-300	r	r	r	r	rad
GH	2	n2	1e-300	1e-300	r2	r2	r2	r2	rad2
GM	0	0	0	0	180/n2-180/n	0	0	0	2
GM	0	0	90	90-180/n	0	0	0	h+r	0
GM	0	0	0	0	0	0	0	ht3	2
GS	0	0	0.3048
GE	1
LD	1	1	n	n	0	0	c
LD	5	0	0	0	58000000
LD	7	0	0	0	4.5
GN	2	0	0	0	4	0.01
EK
EX	0	2	n2	0	1.	0	0
FR	0	0	0	0	frq	0
EN