Planar antenna and antenna array
First Claim
1. A planar antenna apparatus for radiating or receiving a radiowave, having a wavelength of one centimeter or less, of a radio communication system, comprising:
- a planar substrate;
an electric conduction layer which connects said planar substrate to a circuitry of said radio communication system, said electric conduction layer providing a tapered slot pattern for radiating and receiving the radiowave, wherein said tapered slot pattern is described by a following function;
##EQU4## wherein x is a variable of position coordinates on a radiation direction of said planar antenna apparatus, and a, b, and c are predetermined constants.
1 Assignment
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Accused Products
Abstract
A tapered slot plane antenna apparatus for a millimeter wave radio communication system which provides a tapered pattern composed by utilizing a Fermi-Diac distribution function so as to consider an impedance matching and a directivity of the antenna apparatus. Supporting layers and protection layers may be utilized to provide sufficient strength for implementation in a compact millimeter wave radio communication system. The plane antenna may further prevent a directivity from deteriorating even if distances between end portions of an antenna aperture portion and ends of an antenna are decreased. A slot width of a slot line may be widened in tapering for radiating an electromagnetic wave in a progressive direction of the slot line by a conductor portion having a slot line and a corrugated structure portion at respective end portions located parallel to a radiating direction of the electromagnetic wave.
97 Citations
19 Claims
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1. A planar antenna apparatus for radiating or receiving a radiowave, having a wavelength of one centimeter or less, of a radio communication system, comprising:
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a planar substrate; an electric conduction layer which connects said planar substrate to a circuitry of said radio communication system, said electric conduction layer providing a tapered slot pattern for radiating and receiving the radiowave, wherein said tapered slot pattern is described by a following function;
##EQU4## wherein x is a variable of position coordinates on a radiation direction of said planar antenna apparatus, and a, b, and c are predetermined constants.
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2. A planar antenna apparatus for radiating or receiving a radiowave, having a wavelength of one centimeter or less, of a radio communication system, comprising:
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a planar substrate; an electric conduction layer which connects said planar substrate to a circuitry of said radio communication system, said electric conduction layer providing a tapered slot pattern for radiating and receiving the radiowave, wherein said tapered slot pattern is described by a following function;
##EQU5## wherein x is a variable of position coordinates on a radiation direction of said planar antenna apparatus, and a, b, c and d are predetermined constants.
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3. A planar antenna apparatus for radiating or receiving a radiowave of a radio communication system, comprising:
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an antenna layer including a dielectric layer, and which provides a tapered pattern for radiating and receiving the radiowave; supporting layers which sandwich said antenna layer, wherein said supporting layers are composed of materials which have a lower dielectric ratio than said dielectric layer of said antenna layer; and protection layers which sandwich said supporting layers, wherein said protection layers are composed by dielectric materials and which are further harder materials than said supporting layers. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. A plane antenna having a structure in which a slot width of a slot line is widened in tapering for radiating an electromagnetic wave in a progressive direction of said slot line, comprising:
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a conductor portion having said slot line; and a corrugated structure at respective end portions of said conductor portion located parallel to a radiating direction of said electromagnetic wave. - View Dependent Claims (11, 12, 13, 14)
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15. An antenna array including, on a same plane, a plurality of plane antennas having a structure in which a slot width of a slot line is widened in tapering for radiating an electromagnetic wave in a progressive direction of said slot line, comprising:
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a conductor portion having a plurality of said slot lines; and a slit in which a corrugated structure is disposed between each of said slot lines. - View Dependent Claims (16, 17, 18, 19)
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Specification