Substrate lens antenna device
First Claim
1. A device comprising a substrate lens antenna, the device comprising:
- a leaky wave antenna structure having a feed point and a first and second wave propagation branch extending from the feed point in mutually different directions in a first plane;
a lens shaped dielectric body having a plane surface containing a focal point of the lens shaped dielectric body, the plane surface located adjacent the first plane, with the focal point adjacent the feed point; and
a spacer between the leaky wave antenna structure and the lens shaped dielectric body, the spacer providing for a gap between the leaky wave antenna structure and the plane surface of the lens shaped dielectric body, at least along the first and second wave propagation branches, the gap increasing a speed of propagation of the electromagnetic waves along the first and second wave propagation branches.
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Accused Products
Abstract
A device with a substrate lens antenna uses a lens shaped dielectric body located on top of a planar feed antenna. A leaky wave antenna structure is used as feed antenna. The leaky wave antenna structure has a feed input and a first and second wave propagation branch extending from the feed input. The lens shaped dielectric body has a plane surface containing a focal point of the lens shaped dielectric body, the plane surface located adjacent the first plane, with the focal point adjacent the position of the feed input. Preferably the lens shaped dielectric body is spaced from the leaky wave structure at a sufficient distance to remove most of the propagation speed reduction effect of the dielectric on wave propagation along the leaky wave antenna. This helps to suppress undesirable side-lobes.
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Citations
16 Claims
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1. A device comprising a substrate lens antenna, the device comprising:
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a leaky wave antenna structure having a feed point and a first and second wave propagation branch extending from the feed point in mutually different directions in a first plane; a lens shaped dielectric body having a plane surface containing a focal point of the lens shaped dielectric body, the plane surface located adjacent the first plane, with the focal point adjacent the feed point; and a spacer between the leaky wave antenna structure and the lens shaped dielectric body, the spacer providing for a gap between the leaky wave antenna structure and the plane surface of the lens shaped dielectric body, at least along the first and second wave propagation branches, the gap increasing a speed of propagation of the electromagnetic waves along the first and second wave propagation branches. - View Dependent Claims (2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16)
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7. A method of receiving and or transmitting signals with frequencies spread over a wide band, the method comprising:
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providing for leaky wave propagation along branches of a leaky wave antenna structure in a first plane; and focussing and/or inverse focussing radiation to and/or from both branches using a lens shaped dielectric body with a focal point adjacent a feed point between the branches, wherein a leaky wave propagates along the branches through a gap between the leaky wave antenna structure and the lens shaped dielectric body, the gap increasing a speed of propagation of electromagnetic waves along the branches. - View Dependent Claims (8)
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Specification