H+U 2-Bay Bowtie RLH2 (10.5x8.75) + Rectangular Hi-VHF Resonator Loop (No Reflector) analyzed using 4nec2 after ALL RLH2 (10.5x8.75) Dimensions determined using nikiml's Python Optimization Scripts, allowing Whiskers to Extend beyond Loop. Forward Bow Sweep assumed to be 0.5-in for the purposes of this model to prevent collisions with the Loop.
In practice, a thinner piece of plastic or wood could be used, esp. if using Copper or Aluminized Foil Tape. Dimensions can be used with either modeled AWG10, or AWG12 or even 1/4-in Foil Tape.
Hi-VHF Resonator Loop greatly improved Hi-VHF SWR and hence Net Gain, with only 1 dB UHF Gain Loss:
UHF Raw Gain = 6.4 to 9.5 to 9.2 to 9.5 dBi and SWR (300-ohms) Under 3.6 [GOOD]. Hi-VHF Raw Gain = 3.4 to 3.6 dBi and SWR (300-ohms) Under 3.4 [GOOD].