05457470 is referenced by 8 patents and cites 4 patents.

An M-type car antenna for traffic information communication systems including an antenna element having a length which is one-half of the wavelength of the radio way used in the information communication systems, and a connector which is connected via an electrostatic coupling to the center-of the antenna element, the impedance matching and feeding being carried out by the connector. In this antenna, the voltage polarity of the connector at the coupling point and that of the center of the antenna element are set to be opposite from each other, and the electric current in the antenna element and that in the connector are set to be in the same direction. Thus, the M-type antenna is compact and easy to manufacture with stable antenna characteristics.

Title
M-type antenna for vehicles
Application Number
8/99624
Publication Number
5457470
Application Date
July 30, 1993
Publication Date
October 10, 1995
Inventor
Yoshimi Egashira
Kanagawa
JP
Xu Hai
Kanagawa
JP
Agent
Koda and Androlia
Assignee
Harada Kogyo Kabushiki Kaisha
JP
IPC
H01Q 9/30
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