Glass antenna for vehicle and window glass for vehicle

摘要

A glass antenna includes a shared antenna conductor which meets a first frequency band and a second frequency band higher than the first frequency band and a feeding part connected to the shared antenna conductor. The shared antenna conductor includes a first element extended from the feeding part as a starting point and a second element extended from the first element as a starting point. At least a part of the first element and the second element configure a semi-loop form. When a wavelength in air in a central frequency of the second frequency band is λ02, a glass shortening coefficient of wavelength is k2 and λg2=λ02·k2, a conductor length of the first element is 0.65 λg2 or higher and 1.0 λg2 or lower, and the shortest distance between a defogger provided in window glass and the shared antenna conductor is 15 mm or longer.

主权项

1. A glass antenna for a vehicle provided in window glass of a vehicle, comprising:
a shared antenna conductor which meets a first frequency band and a second frequency band higher than the first frequency band; and a feeding part connected to the shared antenna conductor, wherein the shared antenna conductor includes a first element extended from the feeding part as a starting point and a second element extended from the first element as a starting point, a termination of an extension of the first element and a termination of an extension of the second element are provided to be close to each other so that at least a part of the first element and the second element configure a semi-loop form having a cut-out part in a part of a loop form, when a wavelength in air in a central frequency of the second frequency band is λ02, a glass shortening coefficient of wavelength is k2 (in this case, k2=0.64) and λg2=λ02·k2, a conductor length of the first element is 0.65 λg2 or higher and 1.0 λg2 or lower, and the shortest distance between a defogger provided in the window glass and the shared antenna conductor is 15 mm or longer.