Hi-VHF+UHF Bowtie-in-Loop (BIL) with 11 Reflector Rods analyzed using 4nec2. Dimensions were determined using nikiml's Python Optimization Scripts. Two separate sets of Reflector Rods with different Lengths & Separation from BIL were assumed to Optimize Hi-VHF & UHF, using different Min/Max search ranges.
UHF Min & Max Raw Gain: 8.7 & 10.4 dBi, F/B & F/R Ratio Min = 11.0 dB and SWR (300-ohms) under 3.2. HiVHF Raw Gain: 7.1 to 6.9 dBi, F/B & F/R Ratio Min = 14.9 dB and SWR (300-ohms) 6.7 to 2.6, which is excessive on the mid to lower channels but may be acceptable in many situations.
Date(s): 23 Sept 2013. Album by holl_ands. 1 - 23 of 23 Total. 7457 Visits.
enlarge 83KB, 936x1024 1 Hi-VHF+UHF Bowtie-In-Loop + 11RR 3D View
enlarge 181KB, 1024x650 2 Hi-VHF+UHF Bowtie-In-Loop + 11RR Front View [1 large square = 5 inches]
enlarge 143KB, 577x1024 3 Hi-VHF+UHF Bowtie-In-Loop + 11RR Top View [1 large square = 5 inches]
enlarge 181KB, 1152x686 4 Hi-VHF+UHF Bowtie-In-Loop + 11RR UHF Min & Max Raw Gain: 8.7 & 10.4 dBi UHF F/B & F/R Ratio Minimum = 11.0 dB
enlarge 200KB, 1152x686 5 Hi-VHF+UHF Bowtie-In-Loop + 11RR UHF SWR (300-ohms) Under 3.2 Poor on the lowest channels