Directional antenna assembly
First Claim
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1. A directional antenna assembly arrangement comprising:
- a dielectric structure having a surface, wherein a ground plane is not positioned in or on the dielectric structure; and
an array of wire antenna elements disposed within or on the surface of the dielectric structure, at least one of the wire antenna elements being active and the remainder being passive.
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Abstract
A directional antenna assembly includes a dielectric structure having a surface. An array of wire antenna elements is positioned within or on the surface of the dielectric structure. At least one of the wire antenna elements is active, and the remainder of the wire antenna elements are passive.
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Citations
32 Claims
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1. A directional antenna assembly arrangement comprising:
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a dielectric structure having a surface, wherein a ground plane is not positioned in or on the dielectric structure; and
an array of wire antenna elements disposed within or on the surface of the dielectric structure, at least one of the wire antenna elements being active and the remainder being passive.
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2. A directional assembly arrangement comprising:
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a dielectric structure having a surface, wherein the dielectric structure is formed from a material having a relative dielectric constant ∈
r of greater than four, andan array of wire antenna elements positioned within or on the surface of the dielectric structure, at least one of the wire antenna elements being active and the remainder being passive. - View Dependent Claims (3)
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4. A directional antenna assembly arrangement comprising:
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a dielectric structure having a surface;
an array of wire antenna elements positioned within or on the surface of the dielectric structure, at least one of the wire antenna elements being active and the remainder being passive; and
switching means electrically connected to the antenna elements, the switching means being operable to selectively switch one or more of the antenna elements to be active. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13)
where λ
0 is the wavelength in free space of the electromagnetic radiation to be received or transmitted by the antenna elements, and ∈
r is the relative permittivity of the dielectric structure.
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13. The antenna assembly arrangement as claimed in claim 12, wherein the length of the antenna elements is greater than.
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0 5 · 1 ɛ r .
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14. An antenna assembly including at least:
a substantially planar structure of dielectric material, wherein a ground plane is not positioned in or on the structure of dielectric material, and an array of at least three antenna elements mounted on a common surface of said structure, the array including an active element having a feed connection point, a first passive element being parallel with and spaced apart from the active element, and a second passive element being parallel with and spaced apart from the first active element in an opposed direction to said first passive element. - View Dependent Claims (15, 16, 17, 18)
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19. An antenna assembly including at least:
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a substantially planar structure of dielectric material, and an array of at least three antenna elements mounted on a common surface of said structure, the array including an active element having a feed connection point, a first passive element being parallel with and spaced apart from the active element, and a second passive element being parallel with an spaced apart from the active element in an opposed direction to said first passive element wherein said antenna elements are substantially elongate, wherein said second passive element has a transverse portion substantially L-shaped, and of greater length than the active element to act as a reflector, and said L-shaped second passive element is arranged to at least partially surround the active element. - View Dependent Claims (20, 21, 22, 23)
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24. An antenna assembly including at least:
a substantially planar structure of dielectric material, and an array of at least three elongate antenna elements mounted on a first surface of said dielectric material, the array including an active element having a feed connection point, a first passive element being parallel with and spaced apart from the active element, and a second passive element being parallel with and spaced apart from the first active element in an opposed direction to said first passive element, said second passive element also extending through the dielectric material to a second surface opposite the first surface. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
Specification