masters.nec

zip contains tool for Antenna Modelling with examples

CM Masters Superturnstile Element, by K6STI
CE
SY D = .0035  ' .005 
GW	1	5	0	.04	.325	0	.27	.325	D
GW	2	5	0	.04	.217	0	.222	.217	D
GW	3	3	0	.04	.108	0	.173	.108	D
GW	4	3	0	.04	0	0	.125	0	D
GW	5	3	0	.04	-.108	0	.173	-.108	D
GW	6	5	0	.04	-.217	0	.222	-.217	D
GW	7	5	0	.04	-.325	0	.27	-.325	D
GW	8	3	0	.04	.325	0	.04	.217	D
GW	9	3	0	.04	.217	0	.04	.108	D
GW	10	3	0	.04	.108	0	.04	0	D
GW	11	3	0	.04	0	0	.04	-.108	D
GW	12	3	0	.04	-.108	0	.04	-.217	D
GW	13	3	0	.04	-.217	0	.04	-.325	D
GW	14	3	0	.27	.325	0	.222	.217	D
GW	15	3	0	.222	.217	0	.173	.108	D
GW	16	3	0	.173	.108	0	.125	0	D
GW	17	3	0	.125	0	0	.173	-.108	D
GW	18	3	0	.173	-.108	0	.222	-.217	D
GW	19	3	0	.222	-.217	0	.27	-.325	D
GW	20	1	0	.04	.325	0	0	.325	D
GW	21	1	0	.04	-.325	0	0	-.325	D
GW	22	1	0	.04	0	0	0	0	D
GX	30	010	' Add when needed.
GE	0
EX	0	22	1	00	1.0	0.0
EX	0	52	1	00	-1.0	0.0
'
GN	-1
FR	0	1	0	0	 299.8
EN
'This is one element of a wide-bandwidth, omnidirectional, horizontally polarized
'array called a Masters superturnstile (or batwing).  Two of these elements are
'placed at right angles and phased 90 degrees.  Several such bays are stacked for
'increased gain.  Batwing antennas are widely used for TV transmission.  For more
'information, see "Antennas" by John Kraus, 2nd ed., pp 729-731.