The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 1990
Filed:
Jun. 27, 1988
Toru Yamazaki, Chiryu, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A multiband antenna system for use in a motor vehicle, which includes a one-unit antenna section coupled to a transceiver for transmission and reception of a signal with a frequency in a first frequency band and a receiver for reception of a signal with a frequency in a second frequency band. The antenna section, being provided so as to be protruded upwardly from the motor vehicle, comprises a first antenna element adapted to operate with respect to the first frequency band and a second antenna element adapted to operate with respect to the second frequency band different from the first frequency band. The second antenna element is made up of a conductor tube which is in turn introduced into the motor vehicle and further extends up to the transceiver. A center conductor line is coaxially encased in the conductor tube so as to make up a coaxial line, one end of which is connected to the first antenna element and the other end of which is coupled to the transceiver. Also included in the system is a connector which performs coupling between the conductor tube and the receiver. Between the connector and the transceiver is provided a noise-reduction device which has a high inductance so as to cut off noises led to the coaxial line and introduced through the connector into said receiver.