High gain frequency step horn antenna
First Claim
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1. A passive radiator element for RF communications, comprising:
- a planar dielectric substrate, said dielectric substrate defined by a periphery including a left and right vertical side and an upper and lower horizontal side;
a first substrate surface of said dielectric substrate, a portion of which is covered with a conductive material and a portion of which is uncovered;
said conductive material forming a pair of lobes having substantially identical mirror-image shapes;
said lobes having respective opposing linear first side edges extending on opposite sides of a cavity of said uncovered substrate surface;
said lobes extending in opposite directions to respective distal tips;
said distal tips defined by an inner and outer vertical side and a horizontal side;
said cavity having a mouth portion, said mouth portion beginning at a first edge, along a line extending between said distal tips;
said mouth having a widest portion defined by a distance between said inner vertical side of each distal tip;
said cavity reducing in cross-section from said first edge as it extends to a narrowest point substantially centered between said pair of lobes;
notches formed in opposing positions along both of said respective linear first side edges, said notches providing means for enhanced reception of frequencies specific to distances between respective pairs of said notches in said respective opposing positions;
said pair of lobes including a first lobe and a second lobe;
a continuously curved portion of said cavity extending from proximal said narrowest point into said second lobe, wherein said continuously curved portion extends in excess of 180 degrees to form a substantially circular configuration; and
a feedline located at a second substrate surface, wherein said second substrate surface is opposite said first substrate surface, wherein said feedline comprises a substantially circular portion that is positioned within said substantially circular configuration, and wherein said feedline is configured to electrically communicate at a first end with said second lobe and adapted at a second end for electrical communication with an RF receiver or transceiver.
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Abstract
A radiator element for RF communications formed of a planar conductive material positioned upon a planar dielectric substrate surface. Two lobes formed of the conductive material have side edges abutting a cavity decreasing in cross section between the lobes. The cavity has a widest point configured to receive RF frequencies at the lowest frequency and a narrowest point configured to receive a highest frequency of the element. Opposing pairs of notches in the side edges of the lobes along the decreasing edges of the cavity enhance the frequency of operation for frequencies paired to the distance between the pairs of notches.
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Citations
18 Claims
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1. A passive radiator element for RF communications, comprising:
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a planar dielectric substrate, said dielectric substrate defined by a periphery including a left and right vertical side and an upper and lower horizontal side; a first substrate surface of said dielectric substrate, a portion of which is covered with a conductive material and a portion of which is uncovered; said conductive material forming a pair of lobes having substantially identical mirror-image shapes; said lobes having respective opposing linear first side edges extending on opposite sides of a cavity of said uncovered substrate surface; said lobes extending in opposite directions to respective distal tips; said distal tips defined by an inner and outer vertical side and a horizontal side; said cavity having a mouth portion, said mouth portion beginning at a first edge, along a line extending between said distal tips; said mouth having a widest portion defined by a distance between said inner vertical side of each distal tip; said cavity reducing in cross-section from said first edge as it extends to a narrowest point substantially centered between said pair of lobes; notches formed in opposing positions along both of said respective linear first side edges, said notches providing means for enhanced reception of frequencies specific to distances between respective pairs of said notches in said respective opposing positions; said pair of lobes including a first lobe and a second lobe; a continuously curved portion of said cavity extending from proximal said narrowest point into said second lobe, wherein said continuously curved portion extends in excess of 180 degrees to form a substantially circular configuration; and a feedline located at a second substrate surface, wherein said second substrate surface is opposite said first substrate surface, wherein said feedline comprises a substantially circular portion that is positioned within said substantially circular configuration, and wherein said feedline is configured to electrically communicate at a first end with said second lobe and adapted at a second end for electrical communication with an RF receiver or transceiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A radiator element for RF communications, comprising:
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a planar dielectric substrate, said dielectric substrate defined by a periphery including a left and right vertical side and an upper and lower horizontal side; a first substrate surface of said dielectric substrate, a portion of which is covered with a conductive material and a portion of which is uncovered; said conductive material forming a pair of lobes having substantially identical mirror-image shapes; said lobes having respective opposing linear first side edges extending on opposite sides of a cavity of said uncovered substrate surface; said lobes extending in opposite directions to respective distal tips; said respective distal tips defined by an inner and outer vertical side and a horizontal side; said cavity having a mouth portion, said mouth portion beginning at a first edge, along a line extending between said respective distal tips; said mouth having a widest portion defined by a distance between said inner vertical sides of each distal tip; said cavity reducing in cross-section from said first edge as it extends to a narrowest point substantially centered between said pair of lobes; notches formed in opposing positions along both of said respective linear first side edges, said notches providing means for enhanced reception of frequencies specific to distances between respective pairs of said notches in said respective opposing positions; and a continuously curved portion of said cavity extending in excess of 180 degrees to form a substantially circular configuration; and a feedline located at a substrate surface that is opposite said first substrate surface, wherein said feedline comprises a substantially circular portion that is positioned within said substantially circular configuration, and wherein said feedline is configured to electrically communicate at a first end with one of said pair of said lobes and adapted at a second end for electrical communication with an RF receiver or transceiver. - View Dependent Claims (14, 15, 16)
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17. A passive radiator element for RF communications, comprising:
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a planar dielectric substrate, said dielectric substrate defined by a periphery including a left and right vertical side and an upper and lower horizontal side; a first substrate surface of said dielectric substrate, a portion of which is covered with a conductive material and a portion of which is uncovered; said conductive material forming a pair of lobes having substantially identical mirror-image shapes; said lobes having respective opposing linear first side edges extending on opposite sides of a cavity of said uncovered substrate surface; said lobes extending in opposite directions to respective distal tips; said cavity having a mouth portion, said mouth portion beginning at a first edge, along a line extending between said distal tips; said cavity reducing in cross-section from said first edge as it extends to a narrowest point substantially centered between said pair of lobes; notches formed in opposing positions along both of said respective linear first side edges, said notches providing means for enhanced reception of frequencies specific to distances between respective pairs of said notches in said respective opposing positions; said pair of lobes including a first lobe and a second lobe; a continuously curved portion of said cavity extending from proximal said narrowest point into said second lobe, wherein said continuously curved portion extends in excess of 180 degrees to form a substantially circular configuration; and a feedline located at a second substrate surface, wherein said second substrate surface is opposite said first substrate surface, wherein said feedline comprises a substantially circular portion that is positioned within said substantially circular configuration, and wherein said feedline is configured to electrically communicate at a first end with said second lobe and adapted at a second end for electrical communication with an RF receiver or transceiver. - View Dependent Claims (18)
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Specification