Communications: radio wave antennas – Antennas – With vehicle
Patent
1991-02-28
1992-09-08
Wimer, Michael C.
Communications: radio wave antennas
Antennas
With vehicle
343829, 343830, H01Q 132
Patent
active
051462320
ABSTRACT:
An antenna mounted on a mobile. In a first structure, a radiating element is composed of a ground plate, a vertical conductor plate and a parallel conductor plate placed on the ground plate with a predetermined space therebetween in such a manner as to have a T-shaped section and placed on the ground plate with a narrow space therebetween, and posts for connecting the edges of the parallel plate to the ground plate. Power is fed to the lower edge of the vertical conductor plate, thereby enabling a plurality of current paths to be formed in the radiating element and, hence, resonance in a wide frequency band. In a second structure, a radiating element has a conductor plate for impedance compensation in the vicinity of the feeding point of a conductor which is bent in the form of substantially a box, thereby enabling the reduction of the entire size and sufficiently increasing the length of the radiating element. In a third structure, a radiating element having the first structure and a radiating element having the second structure are adopted for effecting diversity reception.
REFERENCES:
patent: 3967276 (1976-06-01), Goubau
patent: 4201989 (1980-05-01), Czerwinski
patent: 4835541 (1989-05-01), Johnson et al.
patent: 4887090 (1989-12-01), Shibano et al.
patent: 4907006 (1990-03-01), Nishikawa et al.
Review of the Electrical Communication Laboratories, vol. 30, No. 2, Mar. 1982, pp. 359-370, Tokyo, JP; H. Mishima et al, "Antenna and Duplexer for new Mobile Radio Unit".
Patent Abstracts of Japan, vol. 1, No. 162 (E-077), Dec. 21, 1977 & JP-A-52 108 755 (Matsushita Denki Sangyo K.K.), Sep. 12, 1977.
Nishikawa Kunitoshi
Sato Kazuo
Kabushiki Kaisha Toyota Chuo Kenkyusho
Le Hoang-anh
Wimer Michael C.
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