Internal Monopole Antenna
First Claim
1. Antenna apparatus, comprising:
- a substantially planar main element in electrical communication with a first point; and
an auxiliary element electrically coupled with a second point;
wherein a first distance from the substantially planar main element to the auxiliary element measured proximate the second point is substantially smaller than a second distance between the auxiliary element and main element measured away from the second point.
1 Assignment
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Accused Products
Abstract
The invention relates in one aspect to antenna useful with for example a flat a radio device. In one embodiment, the antenna comprises and internal monopole antenna that has an arrangement for improving its characteristics, including a planar monopole radiator and an auxiliary element. The auxiliary element can be a mere conductor strip, or a ceramic plate partly coated with a conductor for example. The conductor of the auxiliary element is connected to the ground at a point (SP), which is relatively close to the feed point (FP) of the planar element. The planar element can be shaped to form two operating bands for the antenna. The auxiliary element can be used to increase the bandwidth of the internal monopole antenna and/or to improve the omnidirectional radiation of the antenna.
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Citations
46 Claims
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1. Antenna apparatus, comprising:
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a substantially planar main element in electrical communication with a first point; and an auxiliary element electrically coupled with a second point; wherein a first distance from the substantially planar main element to the auxiliary element measured proximate the second point is substantially smaller than a second distance between the auxiliary element and main element measured away from the second point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 41, 42, 43)
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19. Antenna apparatus, comprising:
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a substantially planar main element having first and second portions, said first and second portions corresponding substantially to first and second radio frequency operating bands; and an auxiliary element disposed proximate said main element and adapted to enhance the uniformity of omni-directional radiation emitted from said apparatus. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A method of operating an antenna, comprising:
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providing a first radiating element; providing a second radiating element in substantial proximity to but not in electrical contact with the first element; capacitively coupling the first and second elements; operating said first radiating element within at least a first frequency band, said first frequency band comprising at least one resonance frequency; and operating said second radiating element at a frequency which is proximate the at least one resonance frequency of the first element. - View Dependent Claims (29, 30)
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31. Radio frequency apparatus, comprising:
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a radio frequency transceiver; and an antenna apparatus in signal communication with said transceiver, said antenna apparatus comprising; a substantially planar main element having first and second portions, said first and second portions corresponding substantially to first and second operating frequencies; and an auxiliary element disposed proximate said main element and parasitically coupled thereto, said auxiliary element adapted to radiate at a third operating frequency which is proximate, but not identical to, at least one of said first and second frequencies. - View Dependent Claims (32, 33, 34)
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- 35. An internal monopole antenna of a radio device, a main radiator of which antenna is a planar element and is connected to an antenna feed point (FP) on a circuit board (PCB) of the radio device, the antenna further comprising a parasitic auxiliary element, which is connected to a short-circuit point (SP) being located on the circuit board and belonging to a signal ground, characterized in that said auxiliary element is located at the planar element as viewed in the direction of its normal and comprises a conductor, the distance of which from the planar element at the end of the auxiliary element on the side of the short-circuit point (SP) is substantially smaller than at the opposite end of the auxiliary element in order to improve the antenna matching.
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46. High-efficiency antenna apparatus for use in a radio frequency device, comprising:
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a first substantially planar radiating element having first and second portions and first and second resonances associated therewith, respectively; a second substantially planar radiating element disposed substantially parallel to, and parasitically coupled to, the first element, and electrically coupled to a ground element; wherein the efficiency of the antenna apparatus is enhanced due to at least the second element shielding between the first element and at least one other conductive parts of the radio frequency device.
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Specification