UHF + Hi-VHF Stealth Hawk (X29 Mod) analyzed using 4nec2, based on dimensions in a post by ota_canuck and named after the X-29 aircraft: http://en.wikipedia.org/wiki/Forward_swept_wing
However, since 0.38-in "equivalent round diameter" for 3/4-in wide Tape elements was too large to model well in 4nec2, 0.2-in diameter was assumed. [Actually the UHF Gain function blew itself up to smithereens....]
Variable Zdrop was employed to determine "optimum" distance (1-in) for mounting the lower element below the feedpoint...although differences were small.
Hi-VHF Gain and SWR are improved wrt swept back version, although it is still Excessive on some Hi-VHF channels. The small dimensions result in UHF Gain being pushed to the upper part of the Band.
Date(s): 25 Apr 2010. Album by holl_ands. 1 - 27 of 27 Total. 4617 Visits.
enlarge 45KB, 1024x645 1 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.0-in.
enlarge 106KB, 1152x325 2 UHF_Hi-VHF Stealth Hawk X29 Mod - Front View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.0-in. [1 small box = 0.5-inch]
enlarge 126KB, 1024x648 4 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.0-in. UHF Raw Gain
enlarge 152KB, 1024x648 5 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.0-in. UHF SWR (300-ohm)
enlarge 152KB, 1024x648 6 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.0-in. UHF Impedance
enlarge 134KB, 1024x648 7 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.0-in. Hi-VHF Raw Gain
enlarge 156KB, 1024x648 8 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.0-in. Hi-VHF SWR (300-ohms)
enlarge 147KB, 1024x648 9 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.0-in. Hi-VHF Impedance
enlarge 140KB, 1024x792 10 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.0-in. UHF Horiz. Polar. 3D Pattern at 470 MHz Max Gain is overhead.
enlarge 144KB, 1024x789 11 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.0-in. UHF Horiz. Polar. 3D Pattern at 527 MHz Max Gain is overhead.
enlarge 144KB, 1024x791 12 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.0-in. UHF Horiz. Polar. 3D Pattern at 584 MHz Max Gain is overhead.
enlarge 138KB, 1024x791 13 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.0-in. UHF Horiz. Polar. 3D Pattern at 641 MHz
enlarge 132KB, 1024x786 14 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.0-in. UHF Horiz. Polar. 3D Pattern at 698 MHz
enlarge 132KB, 1024x786 15 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.0-in. UHF Horiz. Polar. 3D Pattern at 806 MHz
enlarge 129KB, 1024x648 16 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=0.5-in. UHF Raw Gain
enlarge 151KB, 1024x648 17 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=0.5-in. UHF SWR (300-ohm)
enlarge 145KB, 1024x648 18 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=0.5-in. UHF Impedance
enlarge 133KB, 1024x648 19 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=0.5-in. Hi-VHF Raw Gain
enlarge 155KB, 1024x648 20 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=0.5-in. Hi-VHF SWR (300-ohms)
enlarge 148KB, 1024x648 21 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=0.5-in. Hi-VHF Impedance
enlarge 126KB, 1024x648 22 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.5-in. UHF Raw Gain
enlarge 169KB, 1024x648 23 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.5-in. UHF SWR (300-ohm)
enlarge 144KB, 1024x648 24 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.5-in. UHF Impedance
enlarge 126KB, 1024x648 25 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.5-in. Hi-VHF Raw Gain
enlarge 150KB, 1024x648 26 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.5-in. Hi-VHF SWR (300-ohms)
enlarge 149KB, 1024x648 27 UHF_Hi-VHF Stealth Hawk X29 Mod - 3D View WL=7-in at 29.12-deg, BL=8-in at 30-deg, Gaps=3-in. Zdrop=1.5-in. Hi-VHF Impedance
