Claims
- 1. An antenna for the transmission/reception of radio waves for mobile telephone on a glass panel of an automobile comprising:
- a main antenna part comprising a substantially horizontal antenna element, a pair of substantially vertical antenna elements respectively extending vertically from the both ends of said horizontal antenna elements, and a first feeding point connected to the free end of one of said vertical antenna elements,
- an earth line part, provided apart from said main antenna part, which extends in substantially parallel to said horizontal antenna elements and which has a second feeding point at an intermediate portion of the earth line part and below said first feeding point, and
- an auxiliary antenna part shaped as an inverted L which has an extension element extending in substantially parallel to said earth line part which is connected to said horizontal antenna element of the main antenna part.
- 2. The antenna for mobile telephone according to claim 1, wherein the length of said vertical antenna elements, the length of the extension element of said auxiliary antenna part is given by (.lambda./4).alpha.(.alpha.: reduction factor of a wavelength for a glass antenna) where .lambda. is a predetermined wavelength.
- 3. The antenna for mobile telephone according to claim 1, wherein said main antenna part is constituted by plural sets of the horizontal antenna element and paired vertical antenna elements, and a free end of each of said plural sets of antenna is connected to said auxiliary antenna part which is connected to said first feeding point.
- 4. The antenna for mobile telephone according to claim 3, wherein an additional auxiliary antenna part is connected to the horizontal antenna element of an outermost set.
- 5. The antenna for mobile telephone according to claim 1, wherein the distance between a free end of said earth line part and said second feeding point is given by (.lambda./4).alpha.(.alpha.: reduction factor of a wavelength for a glass antenna) where .lambda. is a predetermined wavelength.
Priority Claims (1)
Number |
Date |
Country |
Kind |
61-179304 |
Nov 1986 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 122,450, filed on Nov. 19, 1987, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0124055 |
Nov 1984 |
EPX |
0100004 |
May 1986 |
JPX |
0222302 |
Oct 1986 |
JPX |
0280107 |
Dec 1986 |
JPX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
122450 |
Nov 1987 |
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