antenna theory - How to calculate single-stub match (general case)? - Amateur Radio Stack Exchange
easy quad calculator enter center frequency to get a quad antenna size. This resource is listed under Antennas/Antenna Calculators | Antenna, Antennas, Quad
Single Stub Match
Antenna Design Calculators
Online Calculator .:. J-Pole Antenna - Designer
Single Stub Match
Design a J-pole Antenna - Resource Detail - The DXZone.com