MININEC PRO

Subject: MININEC Professional computation times
 
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In NEC-LIST there have been proposed a couple of antenna problems
for the timing of NEC calculations. These two problems were run
using MININEC Professional. The calculations were made on an
Intel Pentium 133-MHz with 256 KB of cache.
 
The first problem was proposed by Larry Laitinen. The problem
was a 299 segment dipole over perfect ground. The NEC data set
is the following:
 
CE
GW 1,299,-139.,0, 6.,+139.,0, 6., .001,
GE 0,
GN 1,
FR 0,0,0,0, 0.54,
EX 0, 1,150,0,1., 0.,
RP 1, 1, 1,0000, 1.5, 0., 0., 0., 1000.,
EN
 
MININEC Professional calculated this problem in 9 seconds using
the same 299 unknowns. This is compared to a NEC calculation
of the 22 seconds on an Intel Pentium 120-MHz.
 
The second problem is attributed to John Boyer. The NEC data
set is the following:
 
CE
GW33,20,.0,-.025,.28,.0,-.025,-.89,.004,
GM1,2,0.,0.,0.,0.,.025,0.,33.,
GM1,5,0.,0.,0.,-.025,0.,0.,35.,
GM5,1,0.,0.,0.,.0,-.05,0.,36.,
GW49,25,.14,0.,-.19,.14,0.,.19,0.014,
GM1,1,0.,0.,0.,0.,0.,-.61,49.,
GM0,0,0.,0.,0.,.17,0.,0.,0.,
GW100,12,0.,-.75,.39,0.,-.75,-1.,.004
GM1,59,0.,0.,0.,0.,.025,0.,100.,
GE0,0,0.,
EX0,49,13,00,1.,0.,
EX0,50,13,00,1.,0.,
FR0,1,0,0,500.,0.,0.,
RP0,1,359,1010,90.,0.,0.,1.,0.,0.,
EN
 
This is a problem with 75 antennas. The problem requires 1030
unknowns to be calculated. Ray Anderson reported times for a
Sun UltraSparc 2 and a SUN SparcServer 1000. The Sun UltraSparc 2
(dual 167 MHz UltraSparc2 processors) had a fastest time of
approximately 530 seconds. MININEC Professional calculated
this problem in 234 seconds on the Intel Pentium 133-MHz.
 
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Richard W. Adler
Naval Postgraduate School, Code EC/AB
833 Dyer Rd. Rm. 437A
Monterey, CA 93943-5121
(408) 656 - 2352, FAX: 2955
RWA_at_mcimail.com
 
Received on Thu May 30 1996 - 22:26:00 EDT