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Glass antenna and window glass for vehicle

A glass antenna and window glass technology, applied to windshields, vehicle parts, antennas suitable for movable objects, etc., can solve the problems of short wave wavelength, cannot ignore AV lines, difficult tuning, etc., and achieve sufficient antenna gain Effect

Inactive Publication Date: 2015-03-04
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when receiving terrestrial digital TV broadcasting, there is a problem that the influence of AV lines cannot be ignored due to the short wavelength of radio waves, and there is a problem that tuning is difficult.

Method used

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  • Glass antenna and window glass for vehicle
  • Glass antenna and window glass for vehicle
  • Glass antenna and window glass for vehicle

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0053] [Example 1] (Shape of the power supply part 12 on the ground side)

[0054] figure 1 In the glass antenna for a vehicle having the configuration shown above, the antenna gain was measured while changing the length A of the portion of the ground-side feeding portion 12 along the flange end portion 16 .

[0055] As a specific configuration of the glass antenna for a vehicle, the antenna-side feeding part 11 is formed in a square pattern with a side of 12 mm, and the ground-side feeding part 12 is formed so as to be spaced apart from the antenna-side feeding part 11 and surround its three sides in a U-shape. Antenna conductor 13 is formed extending from the side of antenna-side feeder 11 not surrounded by ground-side feeder 12 over a total length of 110 mm.

[0056] The width of the interval between the antenna-side power supply unit 11 and the ground-side power supply unit 12 is 2 mm on both sides of the antenna-side power supply unit 11 on the side where the terminal (t...

example 2

[0060] [Example 2] (Length of flange adjacent element 19)

[0061] Then, in figure 1 In the glass antenna for a vehicle having the configuration shown above, the antenna gain was measured while changing the length of the ground conductor 14 . A specific configuration of the glass antenna for a vehicle is the same as in Example 1 except that the length A of the ground-side feeding portion 12 along the flange end 16 is fixed to 62 mm.

[0062] In the above-mentioned glass antenna for a vehicle, the length B of the flange adjacent element 19 of the ground conductor 14 is changed within 0 (no ground conductor 14 is provided) to 308 mm, within the range of 0 to 240 mm by 10 mm each time, and thereafter by 20 mm each time. 308mm is the maximum value and measures the average gain for the entire circumference of the vehicle. The measuring method is the same as Example 1. Based on the measurement results, an average value is calculated for the length B of each flange adjacent member...

example 3

[0065] [Example 3] (distance between flange end 16 and flange adjacent element 19)

[0066] Then, in figure 1 In the glass antenna for a vehicle having the configuration shown above, the connection portion between the ground-side feeder 12 and the ground conductor 14 (flange-adjacent element 19 ) is directed from the corner on the flange end 16 side of the ground-side feeder 12 toward the window glass. The distance C between the flange portion 16 and the flange adjacent element 19 was changed by sliding the center of the antenna 15 in the direction of the center, and the antenna gain was measured. The configuration of the specific antenna is the same as that of Example 1 except for the above-mentioned content and the fact that the length A of the ground-side feeding portion 12 along the flange end 16 is fixed to 62 mm.

[0067] In the aforementioned glass antenna for a vehicle, the distance C between the flange end 16 and the flange adjacent element 19 was varied by 5 mm with...

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Abstract

The present invention provides a glass antenna for vehicle, which can obtain sufficient antenna gain with small area. The glass antenna for vehicle is provided with an antenna side power supply part (11) equipped on the window glass (15), and a grounding side power supply part (12) which is formed with a mode of surrounding one part of the antenna side power supply part (11). The invention is characterized in that the glass antenna comprises the following components: more than one antenna conductor (13) which is connected with the antenna side power supply part (11); and more than one grounding conductor (14) which is connected with the grounding side power supply part (12). Furthermore the grounding conductor (14) is provided with a flange proximity component (19) which is formed along a lfange used for fixing the window glass (15) to the vehicle.

Description

technical field [0001] The present invention relates to a glass antenna for a vehicle and a window glass for a vehicle. Background technique [0002] The general configuration of a monopole glass antenna is to install an antenna conductor on the window glass, connect the power supply part of the antenna conductor to an amplifier installed on the vehicle body side with an AV cable, and ground the vehicle body, etc. on the amplifier side. However, when receiving terrestrial digital television broadcasting, since the wavelength of radio waves is short, the influence of AV lines cannot be ignored, and there is a problem that tuning is difficult. [0003] In order to solve the above-mentioned problems, Japanese Patent Application Laid-Open No. 06-209205 (hereinafter referred to as Patent Document 1), Japanese Patent Application Laid-Open No. 2001-136010 (hereinafter referred to as Patent Document 2), and the like are known. These prior art are: providing the base pattern on the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/32B60J1/00
Inventor 早川宏之野田润
Owner ASAHI GLASS CO LTD