Antennas for vehicles with illuminators

Abstract

The present invention provides a vehicle antenna with a luminous body capable of improving visual recognition performance while maintaining the characteristics of an antenna element. The vehicle antenna is characterized in that it includes: a base (21); an antenna element (42) disposed on the base (21); and a luminous body (52) disposed on the periphery of the base (21). part, located at a lower position than the antenna element (42); and a casing (24), which covers and accommodates the antenna element (42) from above, and the casing (24) is made of a light-transmitting material, and the casing (24) The lower end opening edge of (24) is arranged on the peripheral portion of the base (21).

Description

technical field [0001] The invention relates to a vehicle antenna with a luminous body. Background technique [0002] Conventionally, an antenna device has been mounted on the roof of the vehicle body for reception of TV, radio, etc. In the future, research will be carried out on installing an antenna device for GPS reception on the top cover, an antenna device for receiving signals sent from the remote control key, and the like. [0003] As such an antenna device, a so-called shark fin antenna is known, which includes a fin-shaped case protruding upward from a top cover, and houses an antenna element inside the case. [0004] Here, for example, Patent Document 1 discloses a structure in which illuminants such as LEDs are mounted on the outer surface of the casing, and the illuminants are related to steering operations and remote control key operations (for example, locking and unlocking operations of door locks, for confirming large In a parking lot, etc., the turn signal...

AI Technical Summary

Problems solved by technology

Therefore, the antenna element 103 is affected by the wiring 104 of the luminous body 101, that is, the metal wire, and there is a possibility that the original characteristics of the antenna element 103 cannot be exhibited.

[0011] For example, if Figure 7 , Figure 8 As shown, in the case where the wiring 104 of the illuminant 101 is pulled to the rear of the antenna element 103 and wound, there are particularly problems such as the following problems: With respect to the antenna element 103, the directivity of the rear antenna is lowered, and the rear of the antenna element 103 Generate a null point N (a point at which communication sensitivity is significantly reduced)

[0012] In the case where the mounted antenna element 103 is a radio receiving antenna, etc., the receiving sensitivity decreases significantly depending on the orientation of the vehicle

In addition, when the antenna element 103 is an antenna for receiving transmission signals from the remote control key, if the user operates the remote control key from a zero direction (for example, the rear of the vehicle) (refer to Figure 8 middle arrow), it may hinder the communication between the remote control key and the antenna element 103, and communication cannot be established

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