A J-Pole for 2-meters and 70-cm - Resource Detail - The DXZone.com
Dual Band J-Pole
Build and Review – Dual Band J-Pole 144/440Mhz – New River Valley Amateur Radio Club – N4NRV
Figure I from Design and analysis of dualband J-Pole antenna with variation in “T” shape for transceiver radio communication at VHF and UHF band | Semantic Scholar
A Dual Band VHF/UHF J Pole - Resource Detail - The DXZone.com
Slim Jim and J Pole calculator – M0UKD – Amateur Radio Blog