Internal antenna and methods
First Claim
1. An internal antenna of a radio device, the radio device having a circuit board provided with a ground plane, said antenna comprising:
- a planar monopole radiator, which is divided, as seen from a feed point of the antenna, into a first branch to form a lower operating band for the antenna, and a second branch to form an upper operating band for the antenna, wherein between said branches there remains a slot opening to an outer edge of the radiator, characterized in that said outer edge is the edge of the radiator running substantially in the direction of an end of the circuit board and outside the circuit board as seen from above, and wherein said slot opens to the outer edge in its central area to improve the omnidirectional radiation of the antenna on its upper operating band.
2 Assignments
0 Petitions
Accused Products
Abstract
An internal antenna especially aimed at flat radio devices. The antenna (200) comprises a planar radiator (220) with a branch (221) for forming a lower operating band for the antenna and a second branch (222) for forming an upper operating band. The branches typically form a frame-like pattern. There remains a slot (230) between the branches, opening to the outer edge of the radiator approximately in the middle of the edge running in the direction of the end of the circuit board (205) and being outside the circuit board as seen from above. The omnidirectional radiation of the antenna on its upper operating band improves as compared to the corresponding, known antennas, and its efficiency improves, because the average antenna gain increases.
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Citations
53 Claims
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1. An internal antenna of a radio device, the radio device having a circuit board provided with a ground plane, said antenna comprising:
a planar monopole radiator, which is divided, as seen from a feed point of the antenna, into a first branch to form a lower operating band for the antenna, and a second branch to form an upper operating band for the antenna, wherein between said branches there remains a slot opening to an outer edge of the radiator, characterized in that said outer edge is the edge of the radiator running substantially in the direction of an end of the circuit board and outside the circuit board as seen from above, and wherein said slot opens to the outer edge in its central area to improve the omnidirectional radiation of the antenna on its upper operating band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An antenna for use in a radio device, the radio device having a circuit board comprising a ground plane, said antenna having improved omnidirectional radiation of in an upper operating band comprising:
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a substantially planar monopole radiator, which comprises a first branch to form a lower operating band for the antenna, and a second branch to form said upper operating band for the antenna, between said branches being formed a slot opening to an outer edge of the radiator, said outer edge comprising an edge of the radiator running substantially in the direction of an end of the circuit board and outside at least a portion of the periphery of the circuit board; wherein said slot opens to the outer edge in a central area of said radiator. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An antenna for use in a radio device, the radio device having a substrate means comprising a ground plane, said antenna having improved omnidirectional radiation of in an upper operating band comprising:
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a substantially planar monopole radiator means, the radiator means comprising a first branch to form a lower operating band for the antenna, and a second branch to form said upper operating band for the antenna, between said branches being formed a slot opening to an outer edge of the radiator means, said outer edge comprising an edge of the radiator running substantially in the direction of an end of the substrate means and outside at least a portion of the periphery of the substrate means; wherein said slot opens to the outer edge in a central area of said radiator means.
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22. Antenna apparatus useful in a radio device comprising a substrate having a ground plane thereon, said antenna comprising:
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a feed point; a substantially planar monopole radiator comprising a first branch for a lower operating band of the antenna and a second branch for an upper operating band of the antenna; a slot opening to an outer edge of the substantially planar monopole radiator, said slot opening being disposed in a generally centralized area of said radiator, said slot residing substantially between said first and second branches; and a tuning branch; wherein said slot opening disposed in said generally centralized area improves the omnidirectional radiation characteristics of the antenna apparatus in at least one operating band. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. Antenna apparatus useful in a radio device comprising a substrate having a ground plane thereon, said antenna comprising:
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a feed point; a substantially planar monopole radiator comprising a first branch for a lower operating band of the antenna and a second branch for an upper operating band of the antenna; and a slot opening to an outer edge of the substantially planar monopole radiator, said slot opening being disposed in a generally centralized area of said radiator, said slot residing substantially between said first and second branches; wherein said slot opening disposed in said generally centralized area improves the omnidirectional radiation characteristics of the antenna apparatus in at least one operating band; and wherein at least one of said first and second branches protrudes into said central aperture forming a branch protrusion. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. Antenna apparatus useful in a radio device comprising a substrate having a) ground plane thereon, said antenna comprising:
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a feed point; a substantially planar monopole radiator comprising a first branch for a lower operating band of the antenna and a second branch for an upper operating band of the antenna; and a slot opening to an outer edge of the substantially planar monopole radiator, said slot opening being disposed in a generally centralized area of said radiator, said slot residing substantially between said first and second branches; wherein said slot opening disposed in said generally centralized area improves the omnidirectional radiation characteristics of the antenna apparatus in at least one operating band; and wherein said outer edge comprises a first and a second section at least partly demarcated by said slot opening, said first and second sections being substantially parallel, yet non-collinear, with respect to one another. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53)
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Specification