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holl_ands | Home > Multi-Bay Bowtie Antennas > UHF 2-Bay Bowties - NO Reflectors > Browse:UHF H2 (11x12) 2-Bay Bowtie - NO ReflUHF M2 2-Bay Bowtie - NO ReflectorHiVHF+UHF 2-Bay WallTenna + Enhancements
HiVHF+UHF 2-Bay WallTenna + Enhancements Hi-VHF and UHF 2-Bay Bowtie (7.2x8.0-in) with No Reflector analyzed using 4nec2. Dimensions came from Actual Measurements by user "freezer" on the WallTenna. Yes, it's a 2-Bay Bowtie....but it's WAY TOO SMALL: http://www.walltenna.com Three versions were analyzed: 1) As Built, 2) Add Whisker Extensions to improve UHF performance and 3) Add Co-Planar Rectangular Loop Resonator to improve Hi-VHF Performance. 1) WallTenna As Built: UHF Raw Gain = 3.5 to 7.9 dBi (Very Poor for 2-Bay, esp. lower Freqs) with SWR (300-ohms) under 2.3. Hi-VHF Raw Gain = 2.0 to 2.2 dBi with SWR (300-ohms) = 28 to 15 [Excessive]. ===================================== 2) Add Whisker Extensions to improve UHF performance: UHF Raw Gain = 4.8 to 8.8 dBi (1.3 to 1.9 dB Improvement) with SWR (300-ohms) under 2.9. Hi-VHF Raw Gain = 2.1 to 2.3 dBi with SWR (300-ohms) = 14 to 7.5 [Excessive]. ===================================== 3) Add Co-Planar Rectangular Loop Resonator (23.5-in H x 24-in W) to improve Hi-VHF Performance. UHF Raw Gain = 7.1 to 9.6 to 8.7 dBi (2.6 to 2.0 to 0.8 dB Improvement) with SWR (300-ohms) Under 3.3 (a Bit Higher than "As Built"). Hi-VHF Raw Gain = 3.4 to 3.7 dBi (1.4 to 1.2 dB Better than "As Built") with SWR (300-ohms) under 2.9 (Huge Improvement). ERRATA (18Jan2016): Scale label was incorrect in Slide #38.  Should be 2.5-in vice 1.25-in. Date(s): 2 Feb 2015. Album by holl_ands. 1 - 58 of 58 Total. 4424 Visits.
enlarge 67KB, 955x1024 1 WallTenna 2-Bay Bowtie - As Built 3D View enlarge 258KB, 1024x781 2 WallTenna 2-Bay Bowtie - As Built Front View [1 large square = 1.25 inches] enlarge 28KB, 791x1024 3 WallTenna 2-Bay Bowtie - As Built 4nec2 File - Contains Dimensions Summary enlarge 156KB, 1024x741 4 WallTenna 2-Bay Bowtie - As Built UHF Raw Gain = 3.5 to 7.9 dBi Very Poor for a 2-Bay, esp. lower Channels enlarge 177KB, 1024x741 5 WallTenna 2-Bay Bowtie - As Built UHF SWR (300-ohms) Under 2.3 enlarge 225KB, 1024x741 6 WallTenna 2-Bay Bowtie - As Built UHF Impedance enlarge 313KB, 1024x1024 7 WallTenna 2-Bay Bowtie - As Built Azimuthal Pattern at 470 MHz enlarge 310KB, 1024x1024 8 WallTenna 2-Bay Bowtie - As Built Azimuthal Pattern at 530 MHz enlarge 311KB, 1024x1024 9 WallTenna 2-Bay Bowtie - As Built Azimuthal Pattern at 590 MHz enlarge 315KB, 1024x1024 10 WallTenna 2-Bay Bowtie - As Built Azimuthal Pattern at 650 MHz enlarge 315KB, 1024x1024 11 WallTenna 2-Bay Bowtie - As Built Azimuthal Pattern at 698 MHz enlarge 319KB, 1024x1024 12 WallTenna 2-Bay Bowtie - As Built Azimuthal Pattern at 806 MHz enlarge 162KB, 1024x741 13 WallTenna 2-Bay Bowtie - As Built Hi-VHF Raw Gain = 2.0 to 2.2 dBi enlarge 194KB, 1024x741 14 WallTenna 2-Bay Bowtie - As Built Hi-VHF SWR (300-ohms) = 28 to 15 is Excessive enlarge 219KB, 1024x741 15 WallTenna 2-Bay Bowtie - As Built Hi-VHF Impedance enlarge 314KB, 1024x1024 16 WallTenna 2-Bay Bowtie - As Built Azimuthal Pattern at 174 MHz enlarge 313KB, 1024x1024 17 WallTenna 2-Bay Bowtie - As Built Azimuthal Pattern at 198 MHz enlarge 317KB, 1024x1024 18 WallTenna 2-Bay Bowtie - As Built Azimuthal Pattern at 216 MHz enlarge 62KB, 1011x1024 19 WallTenna 2-Bay + Whisker Extensions 3D View enlarge 299KB, 1024x894 20 WallTenna 2-Bay + Whisker Extensions Front View [1 large square = 1.25 inches] enlarge 30KB, 791x1024 21 WallTenna 2-Bay + Whisker Extensions 4nec2 File Contains DimensionsSummary enlarge 164KB, 1024x741 22 WallTenna 2-Bay + Whisker Extensions UHF Raw Gain = 4.8 to 8.8 dBi enlarge 192KB, 1024x741 23 WallTenna 2-Bay + Whisker Extensions UHF SWR (300-ohms) Under 2.9 enlarge 226KB, 1024x741 24 WallTenna 2-Bay + Whisker Extensions UHF Impedance enlarge 309KB, 1024x1024 25 WallTenna 2-Bay + Whisker Extensions Azimuthal Pattern at 470 MHz enlarge 315KB, 1024x1024 26 WallTenna 2-Bay + Whisker Extensions Azimuthal Pattern at 530 MHz enlarge 314KB, 1024x1024 27 WallTenna 2-Bay + Whisker Extensions Azimuthal Pattern at 590 MHz enlarge 312KB, 1024x1024 28 WallTenna 2-Bay + Whisker Extensions Azimuthal Pattern at 650 MHz enlarge 315KB, 1024x1024 29 WallTenna 2-Bay + Whisker Extensions Azimuthal Pattern at 698 MHz enlarge 314KB, 1024x1024 30 WallTenna 2-Bay + Whisker Extensions Azimuthal Pattern at 806 MHz enlarge 155KB, 1024x741 31 WallTenna 2-Bay + Whisker Extensions Hi-VHF Raw Gain = 2.1 to 2.3 dBi enlarge 188KB, 1024x741 32 WallTenna 2-Bay + Whisker Extensions Hi-VHF SWR (300-ohms) = 14 to 7.5 is Excessive enlarge 220KB, 1024x741 33 WallTenna 2-Bay + Whisker Extensions Hi-VHF Impedance enlarge 311KB, 1024x1024 34 WallTenna 2-Bay + Whisker Extensions Azimuthal Pattern at 174 MHz enlarge 317KB, 1024x1024 35 WallTenna 2-Bay + Whisker Extensions Azimuthal Pattern at 198 MHz enlarge 320KB, 1024x1024 36 WallTenna 2-Bay + Whisker Extensions Azimuthal Pattern at 216 MHz enlarge 85KB, 853x1024 37 WallTenna + Extensions + Rectangular Loop 3D View enlarge 289KB, 1015x1024 38 WallTenna + Extensions + Rectangular Loop Front View [1 large square = 2.5 inches] [Correction: Was 1.25 inches] enlarge 32KB, 791x1024 39 WallTenna + Extensions + Rectangular Loop 4nec2 File Contains Dimensions Summary enlarge 161KB, 1024x741 40 WallTenna + Extensions + Rectangular Loop UHF Raw Gain = 7.1 to 9.6 to 8.7 dBi enlarge 194KB, 1024x741 41 WallTenna + Extensions + Rectangular Loop UHF SWR (300-ohms) Under 3.3 is a Bit Higher than "As Built" enlarge 229KB, 1024x741 42 WallTenna + Extensions + Rectangular Loop UHF Impedance enlarge 315KB, 1024x1024 43 WallTenna + Extensions + Rectangular Loop Azimuthal Pattern at 470 MHz enlarge 314KB, 1024x1024 44 WallTenna + Extensions + Rectangular Loop Azimuthal Pattern at 530 MHz enlarge 318KB, 1024x1024 45 WallTenna + Extensions + Rectangular Loop Azimuthal Pattern at 590 MHz enlarge 318KB, 1024x1024 46 WallTenna + Extensions + Rectangular Loop Azimuthal Pattern at 650 MHz enlarge 320KB, 1024x1024 47 WallTenna + Extensions + Rectangular Loop Azimuthal Pattern at 698 MHz enlarge 342KB, 1024x1024 48 WallTenna + Extensions + Rectangular Loop Azimuthal Pattern at 806 MHz enlarge 157KB, 1024x741 49 WallTenna + Extensions + Rectangular Loop Hi-VHF Raw Gain = 3.4 to 3.7 dBi is 1.4 to 1.2 dB Better than "As Built" enlarge 195KB, 1024x741 50 WallTenna + Extensions + Rectangular Loop Hi-VHF SWR (300-ohms) Under 2.9 enlarge 220KB, 1024x741 51 WallTenna + Extensions + Rectangular Loop Hi-VHF Impedance enlarge 320KB, 1024x1024 52 WallTenna + Extensions + Rectangular Loop Azimuthal Pattern at 174 MHz enlarge 320KB, 1024x1024 53 WallTenna + Extensions + Rectangular Loop Azimuthal Pattern at 198 MHz enlarge 324KB, 1024x1024 54 WallTenna + Extensions + Rectangular Loop Azimuthal Pattern at 216 MHz enlarge 264KB, 1024x696 55 WallTenna vs M2 & H2 UHF Raw Gain enlarge 246KB, 1024x696 56 WallTenna vs M2 & H2 UHF Net Gain enlarge 234KB, 1024x696 57 WallTenna vs M2 & H2 Hi-VHF Raw Gain enlarge 238KB, 1024x696 58 WallTenna vs M2 & H2 Hi-VHF Net Gain Showing Result of SWR Improvement
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