Hi-VHF (+UHF) Twin Rectangular Loops (aka "Shorted Rectangle") analyzed using 4nec2, assuming Picture Metal Frame Size = 36-in H x 24-in W.
Hi-VHF Raw Gain = 4.7 to 5.5 dBi and SWR (300-ohms) under 2.7. UHF Raw Gain = -8.0 to 0.0 dBi is Low but usable Gain for Strong Signals. Even better 45-deg off-axis on many freqs. SWR (300-ohms) under 2.7 [Excellent].
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Date(s): 7 Nov 2013. Album by holl_ands. 1 - 6 of 6 Total. 7402 Visits.
enlarge 42KB, 640x1024 1 Hi-VHF Twin Rectangular Loops 3D View
enlarge 214KB, 695x1024 2 Hi-VHF Twin Rectangular Loops Front View - 36-in H x 24-in W [1 large square = 2.5 inches]