Abstract: An antenna for mounting on a non-conductive surface such as a windshield of an automobile coupled by a capacitor incorporating the windshield as the dielectric medium between the two capacitor plates. The protrusion which receives the antenna acts as one capacitor plate and a PCB acts as the inner capacitor plate.

Abstract: An antenna for mounting on a non-conductive surface such as a windshield of an automobile coupled by a capacitor to housing on the inside of the resonant plate. The antenna has a jack for receiving a plug from a car radio and provides for interchangeability of the cable between the radio receiver and the jack. The circuit allows for fine tuning to the resonant frequency of the antenna.

Abstract: The present invention relates to an improved plug structure for a car antenna, in which the plug has a conductive pin which forms the electrode for connection of electrical cord. The structure comprises an insulative housing, two arch-shaped clamping plates, and the plates are enclosed by a fitting element, while the connection of conductive pin and insulative housing is by means of a star like protrusion which is firmly secured to the housing by casting, such that the pin may not be rotated. The arch-shaped clamping plate acts as a shock absorber which has effective resilency.