5_el_wbeam_pa2awu.nec

zip contains tool for Antenna Modelling with examples

CM Comments:					
CM A 5 element 40 mtr W I R E B E A M  - MMANA-  design  from - P A 2 A W U - 					
CM					
CM Use a FOLDED DIPOLE for a feed impedance of 50 Ohm. In abt 3 month time, 
CM I designed this antenna. We intend to use it in the CQWW SSB 2003 contest.					
CM 					
CM Use a 1:1 BALUN for 50 Ohm symmetric to 50 Ohm koaxial cable.					
CM I found this excellent Balun design in a German book,(THAT'S A MUST!):					
CM Title:        Kurze Antennen					
CM Sub title:    Entwurf und Berechnung verkurzter Sende- und Empfangsantennen.					
CM Author:       Prof. Dr. Gerd Janzen					
CM Printed:      Stuttgart: Franckh'sche Verlagshandlung 1986 					
CM 					
CM Here you find how he (and I) made it:					
CM On the place, 2.60 meter from the end of the used koaxial cable, 					
CM scrap off just a small piece of the PVC mantle (.5 cm). Here you solder					
CM one end of a 2.60 meter long, 2 mm massive(=best), or flexible, copper wire.					
CM Make 7! clockwise windings in the koaxial cable and 7! anti-clockwise					
CM windings in the 2 mm wire. (Coil-diameter will be abt 11.5 cm).					
CM 					
CM Measured SWR:(antenna analyser: HF 65 from AEA) 1:1 (50 Ohm). 					
CM 					
CM pse let me know abt comments and results, or if you need more info!					
CM 					
CM Arend, PA2AWU, Member of the - P A 6 Z - contest group;  Zutphen, The Netherlands. 	
CM 					
CM 5 el wb 55.8 Ohm jX=1.5 SWR=1.12  Ga=12.42 dBi  F/B=60.96 dB   hi 
CE
CM 55.8 Ohm jX=1.5 SWR=1.12  Ga=12.42 dBi F/B=60.9 dB (MMana)  hi 
CM 55.6 Ohm jX=1.3 SWR=1.11, Ga=13.11 dBi F/B=42.7 dB Eff=83% (4Nec2, len=9.20) 
CM 55.2 Ohm jX=5.8 SWR=1.16, Ga=13.11 dBi F/B=42.3 dB Eff=83% (4Nec2, len=9.18) 
CE

'sy len=9.18	' Original PA2AWU lenght
sy len=9.20	' New length for resonance
sy dl=0.4	' Distance between folded lines

GW 2 40 0 -len 15.55-dl 0 0   20-dl    .00085
GW 3 40 0 0    20-dl    0 len 15.55-dl .00085

GW 14 40 0.0 0.0  20.0 0.0 -len  15.55  .00085
GW 15 40 0.0 0.0  20.0 0.0  len  15.55  .00085
GW 16 2 0.0 -len  15.55-dl 0.0 -len  15.55  .00085
GW 17 2 0.0  len  15.55-dl 0.0  len  15.55  .00085

sy ref=9.36
GW 4 11 -8.78 0.0  20.0 -8.78 -ref  15.0  .00085
GW 5 11 -8.78 0.0  20.0 -8.78  ref  15.0  .00085

SY D1L=9.24
GW 6 10  5.59 0.0  20.0  5.59 -D1L  15.5  .00085
GW 7 10  5.59 0.0  20.0  5.59  D1L  15.5  .00085

SY D2L=8.84
GW 8 10  20.75 0.0  20.0  20.75 -D2L  15.5  .00085
GW 9 10  20.75 0.0  20.0  20.75  D2L  15.5  .00085

SY D3L=8.17
GW 10 10  36.02 0.0  20.0  36.02 -D3L  15.5  .00085
GW 11 10  36.02 0.0  20.0  36.02  D3L  15.5  .00085

GW 12 10  36.41 0.0 0.0  36.41 0.0  20.0  .065	' Mast 1
GW 13 10 -9.07 0.0 0.0 -9.07 0.0  20.0  .065	' Mast 2

GE 1
EX 0 2 40 0 1 0
EX 0 3 1 0 1 0
LD 5 0 0 0 57471264
GN 2 0 0 0 13  0.005 0.0 0.0
FR 0 1 0 0 7.065 1
EN