Feed-point tuned wide band antenna
First Claim
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1. An antenna comprising:
- a first radiating structure located substantially in a first plane;
a second radiating structure electrically connected to said first radiating structure and located substantially in a second plane, said first plane being spaced apart from and substantially parallel to said second plane;
a feed point located substantially in said second plane and substantially in register with a first end of said first radiating structure, said feed point being electrically connected to said first radiating structure;
a block of dielectric material located substantially between said first radiating structure and second radiating structure and said feed point to provide a spacing between said first and second planes; and
a stub comprising a length of transmission line having a first end electrically connected to said feed point and a second free end, said stub being located substantially in said second plane and extending in a direction from said feed point towards a second end of said first radiating structure, said second end being opposite said first end of said first radiating structure.
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Abstract
A wideband chip antenna which is capable of receiving and transmitting signals from an ultra wideband system, where the ultra wideband system comprising a plurality of band groups, and where the response of the antenna can be tuned at the design stage so that a zero in the response of the antenna falls so that its peak is at a particular given frequency, and so that the zero occurs inside an unwanted band group of the ultra wideband system.
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Citations
24 Claims
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1. An antenna comprising:
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a first radiating structure located substantially in a first plane; a second radiating structure electrically connected to said first radiating structure and located substantially in a second plane, said first plane being spaced apart from and substantially parallel to said second plane; a feed point located substantially in said second plane and substantially in register with a first end of said first radiating structure, said feed point being electrically connected to said first radiating structure; a block of dielectric material located substantially between said first radiating structure and second radiating structure and said feed point to provide a spacing between said first and second planes; and a stub comprising a length of transmission line having a first end electrically connected to said feed point and a second free end, said stub being located substantially in said second plane and extending in a direction from said feed point towards a second end of said first radiating structure, said second end being opposite said first end of said first radiating structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An antenna comprising:
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a first radiating structure located substantially in a first plane and having a feed point located substantially at a first end of said radiating structure; a second radiating structure located substantially in a second plane, said first plane being spaced apart from and substantially parallel to said second plane; and a block of dielectric material located substantially between said first and second radiating structures to provide a spacing between said first and second planes, wherein said second radiating structure comprises at least two spaced-apart, elongate radiating elements, each of said at least two radiating elements having a respective first end that is electrically connected to said first radiating structure substantially at a second end of said first radiating structure, said respective first end of said at least two radiating elements being substantially in register with said second end of said first radiating structure, and wherein said feed point is located substantially in said second plane and substantially in register with said first end of said first radiating structure, said feed point being electrically connected to said first radiating structure, the antenna further including a stub comprising a length of transmission line having a first end electrically connected to said feed point and a second free end, said stub being located substantially in said second plane and extending in a direction from said feed point towards a second end of said first radiating structure, said second end being opposite said first end of said first radiating structure.
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24. An antenna comprising a first radiating structure located substantially in a first plane;
- a second radiating structure electrically connected to said first radiating structure and located substantially in a second plane, said first plane being spaced apart from and substantially parallel to said second plane;
a feed point located substantially in said second plane and substantially in register with a first end of said first radiating structure, said feed point being electrically connected to said first radiating structure;
a block of dielectric material located substantially between said first radiating structure and second radiating structure and said feed point to provide a spacing between said first and second planes; and
a stub comprising a length of transmission line having a first end electrically connected to said feed point and a second free end, said stub being located substantially in said second plane and extending in a direction from said feed point towards a second end of said first radiating structure, said second end being opposite said first end of said first radiating structure, wherein said antenna has a frequency response that includes a pass band, in which signals may be transmitted and/or received during use, and an attenuation band, in which said signals are relatively attenuated, occurring within said pass band, the arrangement being such that said attenuation band is centred about a frequency that is determined by the length of said stub.
- a second radiating structure electrically connected to said first radiating structure and located substantially in a second plane, said first plane being spaced apart from and substantially parallel to said second plane;
Specification