Glass antenna and window glass for vehicle
A glass antenna, window glass technology, applied in windshields, vehicle parts, antennas suitable for movable objects, etc., can solve the problems of short wavelength of radio waves, difficult to tune, can not ignore AV lines, etc., to achieve sufficient antenna gain Effect
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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
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