CPW-fed circularly polarized appliqué antennas for GPS and SDARS bands

摘要

A flexible thin film antenna, which finds particular application to be glued to a vehicle glass, the antenna being adapted to receive right or left handed circularly polarized signals from, for example, GPS and SDARS satellites. The antenna is a printed planar antenna formed on a substrate and includes a ground plane having an outer peripheral portion defining a slot therein and having a plurality of sides. A T-line tuning stub extends into the slot from one of the two sides, a stub-line curved stub extends from a corner into which two sides of the peripheral portion meet, and extends into the slot and a radiating element electrically insulated from the peripheral portion extends into the slot. The peripheral portion is configured to generate circularly polarized signals to be received by the radiating element, the tuning stubs providing phase alignment of the circularly polarized signals.