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US 7,453,401 B2Granted
Vertical complementary fractal antenna
AssigneeIndustrial Technology Rersearch Institute
InventorUei-Ming Jow
Life of this patent
Estimating the term…
Abstract
A vertical complementary fractal antenna is provided, which includes a first fractal structure and a second fractal structure. The first fractal structure is defined as a superposition over at least one iteration of a motif, while the second fractal structure has a pattern complementary to that of the first fractal structure. Thus, the antenna may effectively increase bandwidth.
Claims25
A vertical complementary fractal antenna, comprising:
- a first fractal structure defined as a superposition over N iterations of a fundamental motif, with N≧1;
- and
- a second fractal structure complementary to the first fractal structure, with an area of the second fractal structure being no less than an area of the first fractal structure,
- wherein a shape of the first fractal structure is different from that of the second fractal structure, and
- a half portion of the first fractal structure and a half portion of the second fractal structure are used at a point of zero current of an antenna resonant frequency.
2 more elements
A vertical complementary fractal antennas, comprising:
- a signal layer made of a conductive material having a first fractal structure which is defined as a superposition over N iterations of a fundamental motif, with N≧1;
- and
- a ground layer made of a conductive material having a second fractal structure complementary to the first fractal structure, with an area of the second fractal structure being no less than an area of the first fractal structure,
- wherein a shape of the first fractal structure is different from that of the second fractal structure, and
- a half portion of the first fractal structure and a half portion of the second fractal structure are used at a point of zero current of an antenna resonant frequency.
2 more elements
A vertical complementary fractal structure, comprising:
- an insulating substrate;
- a plurality of signal layers made of a conductive material, each of the plurality of signal layers having a first fractal structure which is defined as a superposition over N iterations of a fundamental motif, with N≧1;
- and
- a plurality of ground layers made of a conductive material, each of the plurality of ground layers having a second fractal structure complementary to the first fractal structure, with an area of the second fractal structure being no less than an area of the first fractal structure,
- wherein a shape of the first fractal structure is different from that of the second fractal structure, and
- a half portion of the first fractal structure and a half portion of the second fractal structure are used at a point of zero current of an antenna resonant frequency.
3 more elements
Dependencies are inferred from the claim text.