Abstract: A vehicular radio reception antenna is concealed within a body trim piece such as a spoiler or a luggage rack. A supporting body panel is utilized as a ground plane and a conductive loop is concealed within the trim piece. A transmission line connects two opposite sides of the resulting slot. Capacitors are used to connect the conducting loop to the sheet metal ground plane in order to form a dual slot/monopole antenna for receiving both FM and AM signals. An integrated mounting structure provides both mechanical and electrical connection of the trim piece and antenna in a single integrated assembly part.

Abstract: A multiband antenna for mounting on glass for an automotive vehicle window is disposed around the periphery of the window to provide a long length for the AM antenna. A series capacitor decouples one end of the AM monopole antenna from ground. The capacitive element acts as a short circuit at FM frequencies to facilitate operation of the antenna as a dipole for FM signals. A pair of inductive elements is connected in series with the antenna radiating element to effectively trim the length of the antenna to a resonant length for FM frequencies.