Capacitive feed integrated multi-band antenna
First Claim
Patent Images
1. An antenna device, comprising:
- a ground element;
a main radiating element arranged at a predetermined distance from the ground element, the main radiating element having slits for defining lips and having an end short-circuited to the ground element;
a feed element arranged at a predetermined height in a gap between the main radiating element and ground element, arranged along a common lip portion;
a feed electrically connected to the feed element; and
a first secondary element arranged in the gap, and detached from and proximate to the feed element, wherein the feed and the feed element are detached from the main radiating and the ground elements.
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Abstract
An apparatus for a capacitive feed planar inverted-F (PIFA) multi-band antenna is provided. The antenna structure of the present invention typically comprises of a ground element, a main radiating element, having predefined slits and arranged above the ground element, and a capacitive feed element. The capacitive feed element is electrically connected to an antenna feed and is detached from the main radiating and ground elements. By having additional secondary elements, the bandwidth or the number of resonant frequencies of the antenna can be increased without increasing the overall dimensions of the antenna.
92 Citations
11 Claims
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1. An antenna device, comprising:
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a ground element;
a main radiating element arranged at a predetermined distance from the ground element, the main radiating element having slits for defining lips and having an end short-circuited to the ground element;
a feed element arranged at a predetermined height in a gap between the main radiating element and ground element, arranged along a common lip portion;
a feed electrically connected to the feed element; and
a first secondary element arranged in the gap, and detached from and proximate to the feed element, wherein the feed and the feed element are detached from the main radiating and the ground elements. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An antenna device, comprising:
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a ground element;
a main radiating element arranged at a predetermined distance from the ground element, the main radiating element having slits for defining lips and having an end short-circuited to the ground element;
a feed element arranged at a predetermined height in a gap between the main radiating element and ground element, and arranged along a common lip portion;
a feed electrically connected to the feed element; and
a plurality of secondary elements arranged in the gap and proximate to the feed element, wherein the feed and the feed element are detached from the main radiating and the ground elements, and wherein the plurality of secondary elements are each detached from the main radiating element, the feed element and the ground element.
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9. A method of increasing bandwidth and/or number of operation bands in an antenna, comprising the steps of:
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defining at least two resonant frequencies with lips formed from slits on a main radiating element, wherein an end of the main radiating element is short-circuited to a ground element;
capacitively feeding the main radiating element with a feed element arranged along a common lip portion at a predetermined height in a gap between the main radiating element and the ground element;
feeding an input signal to the feed element at a location proximate to the short-circuit end; and
coupling with the feed element using a first secondary element arranged in the gap, and detached from and proximate to the feed element. - View Dependent Claims (10, 11)
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Specification