JPS591252U

JPS591252U - vehicle antenna

Info

Publication number: JPS591252U
Application number: JP9622682U
Authority: JP
Inventors: 近藤　弘志; 晴彦鳥山
Original assignee: トヨタ自動車株式会社
Priority date: 1982-06-24
Filing date: 1982-06-24
Publication date: 1984-01-06

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示すもので、第１図はスペー
スダイハラディ受信方式を示すブロックダイアグラム、
第２図はアンテナを車両に設置した状態を示す説明図、
第３図は直接波と反射波の一伝搬経路をモデノ１化した
説明図、第４図は受信電界強度のＨ偏波成分とＶ偏波成
分のディップ周期の測定方法を示す説明図、第５図は受
信電界強度のＨ偏波成分と■偏波成分に対するディップ
周期を示す説明図、第６図は東京、大阪、名古屋での放
送周波数に対するディップ周期を示す説明図、第７図は
累積ディップ発生確率を従来方式と比較して示す説明図
である。１．３・・・アンテナ、５・・・グイバシテイ方式受信
機、１１・・・車両。第６図第７図The drawings show an embodiment of the present invention, and FIG.
Figure 2 is an explanatory diagram showing the state in which the antenna is installed on the vehicle.
Fig. 3 is an explanatory diagram in which one propagation path of a direct wave and a reflected wave is converted into mode 1. Figure 5 is an explanatory diagram showing the dip period for the H polarization component and ■ polarization component of the received electric field strength, Figure 6 is an explanatory diagram showing the dip period for the broadcasting frequency in Tokyo, Osaka, and Nagoya, and Figure 7 is the cumulative FIG. 2 is an explanatory diagram illustrating the dip occurrence probability in comparison with a conventional method. 1.3...Antenna, 5...Giveaway system receiver, 11...Vehicle. Figure 6 Figure 7

Claims

[Scope of utility model registration request]

A vehicle antenna of the Space Daiharadi reception system, which comprises a pair of antennas installed on the vehicle and a radio receiver that selectively connects the one with a higher reception level to the input side of the two antennas, A vehicle antenna characterized in that the pair of antennas are installed so that their directivity points in different directions.