Car windscreen antenna has broadcast antenna wire and multiple wire combined earth radial and heater with capacitive coupling and stub tuning option

摘要

A car windscreen antenna has a one or two wire broadcast radio or TV antenna (2) and orthogonal flat radial structure (3) used as a wiper heater and comprising parallel (4) and cross lines (5, 6) connected to the centre conductor (10) and earthed (12) shield of a feed cable (9) with the radial. Stub matching may be used and the radial may be connected through capacitive coupling and be on the opposite side to the antenna.