Automotive window glass antenna
US5416491A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1993 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Jan 26, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/1271
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna is attached to a rear window glass of an automobile and arranged in a space between a defogging heater element and a lower edge of the window glass. According to an aspect of the present invention, the antenna comprises a plurality of horizontal conductive strips having the length of 0.02.lambda..multidot.f.sup.1/2 (1.+-.0.2), adjacent two of which are connected at opposite ends so as to constitute a rectangular loop. The number of the horizontal conductive strips is in the range of 2 to 4. According to another aspect of the present invention, the antenna comprises a main element having two horizontal conductive strips and a vertical strip connecting the horizontal strips at one ends located nearer to a widthwise center of the space, and an auxiliary element having a conductive strip made up of a vertical portion extending upward from upper one of the horizontal conductive strips of the main element to have an upper end and a horizontal portion extending between the upper end of the vertical portion and a feed point located at a widthwise marginal area of the space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.