Stripline slot antenna
First Claim
1. A slot-type antenna comprising a first printed circuit board having an electrically conductive layer bonded to both sides thereof with the conductive layer on one side of said first board being etched to remove part of said conductive layer thereon to create a window slot, the conductive layer on the other side of said board being etched to remove a portion of said conductive layer thereon to create a conductive probe area that has a "T" shaped with the top thereof being parallel to and underlying said slot so as to be centered in same with the ends of the top of said "T" shaped probe extending beyond said slot, said probe providing capacitive reactance in parallel with inductive reactance of said cavity means sufficient to counteract said inductive reactance to provide broad band operation, a plurality of holes through said first board around and spaced from said slot with two of said holes passing respectively through said ends of the top of said probe as they extend beyond said slot, a second printed circuit board having an electically conductive layer on only one side thereof, said second board also having a like plurality of holes therethrough with each of said plurality of holes through said second board being in axial registration with each of said plurality of holes through said first board when both said boards are sandwiched together with the conductive layer of said second board being on the outer side of said sandwiched pair of boards, and electrical interconnecting means passing through each of said axially aligned holes through both said first and said second boards when said boards are sandwiched together to electrically connect the conductive layer on said one side of said first board to said ends of the top of said "T" probe and to said conductive layer on said second board, said holes with said connecting means therethrough being spaced close enough to minimize electromagnetic radiation caused by energy applied to said probe from radiating other than through said slot, radio frequency energy applied to said probe causing electrical currents in said conductive layer of said one side of said board around said window slot said interconnecting means and said conductive layer on said second board defining a cavity that only permits electromagnetic radiation to emanate from said slot in the direction opposite from said defined cavity.
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Abstract
A slot antenna capable of relatively broad bandwidth operation is disclosed that may be used for wide angle scanning in phased arrays. By shorting the feed element to the slot radiator at multiple points, the relatively broad bandwidth operation is achieved.
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Citations
3 Claims
- 1. A slot-type antenna comprising a first printed circuit board having an electrically conductive layer bonded to both sides thereof with the conductive layer on one side of said first board being etched to remove part of said conductive layer thereon to create a window slot, the conductive layer on the other side of said board being etched to remove a portion of said conductive layer thereon to create a conductive probe area that has a "T" shaped with the top thereof being parallel to and underlying said slot so as to be centered in same with the ends of the top of said "T" shaped probe extending beyond said slot, said probe providing capacitive reactance in parallel with inductive reactance of said cavity means sufficient to counteract said inductive reactance to provide broad band operation, a plurality of holes through said first board around and spaced from said slot with two of said holes passing respectively through said ends of the top of said probe as they extend beyond said slot, a second printed circuit board having an electically conductive layer on only one side thereof, said second board also having a like plurality of holes therethrough with each of said plurality of holes through said second board being in axial registration with each of said plurality of holes through said first board when both said boards are sandwiched together with the conductive layer of said second board being on the outer side of said sandwiched pair of boards, and electrical interconnecting means passing through each of said axially aligned holes through both said first and said second boards when said boards are sandwiched together to electrically connect the conductive layer on said one side of said first board to said ends of the top of said "T" probe and to said conductive layer on said second board, said holes with said connecting means therethrough being spaced close enough to minimize electromagnetic radiation caused by energy applied to said probe from radiating other than through said slot, radio frequency energy applied to said probe causing electrical currents in said conductive layer of said one side of said board around said window slot said interconnecting means and said conductive layer on said second board defining a cavity that only permits electromagnetic radiation to emanate from said slot in the direction opposite from said defined cavity.
Specification
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- Resources
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Current AssigneeSanders Associates, INC. (BAE Systems Plc)
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Original AssigneeSanders Associates, INC. (BAE Systems Plc)
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InventorsFavaloro, Cosimo J., Bergeron, Maurice A.
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Primary Examiner(s)Lieberman, Eli
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Application NumberUS05/869,543Time in Patent Office813 DaysField of Search343/705, 343/708, 343/767, 343/768, 343/789, 343/700 MS, 343/829US Class Current343/700.0MSCPC Class CodesH01Q 13/106 Microstrip slot antennas pa...H01Q 13/18 the slot being backed by, o...
