The KG4FET Hybrid 6 Meter 4 Element Yagi with Quad Reflector!
A printed hybrid loop planar inverted-F antenna for next generation handheld terminals | Semantic Scholar
HFSS Model of Circular Hybrid Antenna with Quad Fed Circularly... | Download Scientific Diagram
Hamshack – SP9WOL
K9LMM's Mini Quad antenna - YouTube
A quadrature‐hybrid‐integrated reconfigurable feeding network for wideband quad‐polarization‐agile antenna design - Wang - 2021 - International Journal of RF and Microwave Computer-Aided Engineering - Wiley Online Library