Cavity-backed slot antenna
First Claim
1. An antenna for radiating electromagnetic energy comprisinga conductive cavity, anda conductive film carried by a thin dielectric substrate above said cavity, said conductive film including one or more slots across which an electric field is applied to radiate said electromagnetic energy,characterized in that said one or more slots meander to increase the capacitance per unit length of said slot in a direction perpendicular to the electric field as compared to a simple straight slot.
2 Assignments
0 Petitions
Accused Products
Abstract
A cavity backed slot antenna comprises a conductive cavity, a conductive film carried by a thin dielectric substrate which is above the cavity. The conductive film includes one or more slots which an electric field is applied to radiate an electromagnetic energy.
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Citations
17 Claims
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1. An antenna for radiating electromagnetic energy comprising
a conductive cavity, and a conductive film carried by a thin dielectric substrate above said cavity, said conductive film including one or more slots across which an electric field is applied to radiate said electromagnetic energy, characterized in that said one or more slots meander to increase the capacitance per unit length of said slot in a direction perpendicular to the electric field as compared to a simple straight slot.
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4. An antenna for radiating electromagnetic energy comprising
a conductive cavity, and a conductive film carried by a thin dielectric substrate above said cavity, said conductive film including one or more slots across which an electric field is applied to radiate said electromagnetic energy, characterized in that a conductive strip is supported opposite and overlapping the slot to increase the capacitance per unit length of the slot.
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8. An antenna for mounting on a conductive ground plane comprising
a cavity formed by a recess in said ground plane, and a conductive film supported by a dielectric substrate overlying said cavity, said conductive film including one or more slots across which an electric field is applied to radiate electromagnetic fields, characterized in that the said one or more slots meander to increase the capacitance per unit length of said slot in a direction perpendicular to the electric field is increased as compared to that of a simple straight slot.
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11. An antenna for mounting on a conductive ground plane comprising
a cavity formed by a recess in said ground plane, and a conductive film supported by a dielectric substrate overlying said cavity, said conductive film including one or more slots across which an electric field is applied to radiate electromagnetic fields, and conductive strips are placed immediately opposite and overlapping said one or more slots to increase the capacitance per unit length of the slot.
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14. A slot antenna comprising
a cavity, a conductive film carried by a dielectric substrate overlying, said cavity, said conductive film including a first area and a second area spaced from said first area by a slot whereby electric fields applied across said slot radiate electromagnetic fields into the surrounds, and meandering the slot to increase the capacitance per unit length along the adjacent areas of said slot as compared to that of a simple straight slot.
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15. A slot antenna comprising
a cavity, a conductive film carried by a dielectric substrate overlying said cavity, said conductive film including a first area and a second area spaced from said first area by a slot whereby electric fields applied across said slot radiate electromagnetic fields into the surrounds, and positioning a conductive strip opposite and overlapping, said slot to increase the capacitance per unit length of the slot.
Specification