Flat antenna with low overall height
First Claim
1. A substantially flat antenna preferably for frequencies in the Ghz-range, comprising:
- a first electrically conductive area that is not greater than 3/8 of a wavelength, and having at least one slot with an open end pointing at an edge of said conductive area, said at least one slot defining the flow of current in said electrically conductive area so that when the antenna receives a signal in a first and in each additional frequency range, the antenna has at least one resonance frequency in both the first, and in each additional frequency range;
a second electrically conductive area being at least the same size as said first electrically conductive area, wherein said second conductive area acts as a ground shield to said first conductor, wherein said second conductive area is arranged parallel and opposite to said first conductive area;
a conductive bridge connecting a conductive edge of the first conductive area across its width to said second electrically conductive area, said conductive bridge connecting said first conductive area to said second conductive area with low resistance; and
,a coaxial line having an inner conductor and an outer conductor wherein said inner conductor is connected through a coupling point to said first electrically conductive area and said outer conductor is connected to said second electrically conductive area.
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Accused Products
Abstract
The invention relates to an antenna with electrically low overall height, preferably for frequencies in the GHz-range. It consists of a first electrically conductive area (1) which, in the first frequency range, is not larger in any dimension than 3/8 lambda, and a second eletrically conductive area (2) of at least the same size acting as the electrical counterweight, said second area being substantially parallel with the first conductive area (1) and arranged opposite the latter with a certain spacing (A) from the latter, and of a conductive bridge (4) connecting an edge (5) of the first conductive area (1) across a width (B) to the second electrically conductive area (2) in a low-ohmic way in terms of high frequency, whereby the first electrically conductive area (1) is electrically conductively connected in an antenna connection site in a coupling point (3) to the inside conductor of a coaxial line (7) conducting high frequency via a conductor (15), and the dimensions of the antenna and the coupling point (3) are selected in a way such that the antenna is in resonance in the first frequency range. For the formation of resonance, slots (10) having a suitable slot width (9) and shape are formed in at least one additional frequency range at least in one of the two conductive areas or/and in the conductive bridge.
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Citations
16 Claims
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1. A substantially flat antenna preferably for frequencies in the Ghz-range, comprising:
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a first electrically conductive area that is not greater than 3/8 of a wavelength, and having at least one slot with an open end pointing at an edge of said conductive area, said at least one slot defining the flow of current in said electrically conductive area so that when the antenna receives a signal in a first and in each additional frequency range, the antenna has at least one resonance frequency in both the first, and in each additional frequency range; a second electrically conductive area being at least the same size as said first electrically conductive area, wherein said second conductive area acts as a ground shield to said first conductor, wherein said second conductive area is arranged parallel and opposite to said first conductive area; a conductive bridge connecting a conductive edge of the first conductive area across its width to said second electrically conductive area, said conductive bridge connecting said first conductive area to said second conductive area with low resistance; and
,a coaxial line having an inner conductor and an outer conductor wherein said inner conductor is connected through a coupling point to said first electrically conductive area and said outer conductor is connected to said second electrically conductive area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification