Dual mode horn reflector antenna
First Claim
1. A dual mode horn reflector antenna having an input TE10 rectangular mode signal comprising:
- a mode transition section, said input TE10 rectangular mode signal supplied to said mode transition section, said mode transition section generating a first TE10 square mode signal and a first TE01 square mode signal from said input TE10 rectangular mode signal, said first TE01 square mode signal and said first TE10 square mode signals having approximately equal amplitude and equal phases, said mode transition section combining said first TE10 square mode signal and said first TE01 square mode signals to generate a resultant signal;
a horn having a near field, said horn coupled to said mode transition section, said resultant signal supplied to said horn from said mode transition section, said resultant signal propagating in said horn and radiating from said horn; and
,a reflecting structure being located within said near field of said horn, said resultant signal incident upon said reflecting structure, said reflecting structure generating an antenna pattern from said resultant signal.
4 Assignments
0 Petitions
Accused Products
Abstract
A dual mode horn reflector antenna for providing an antenna pattern having symmetrical beamwidths over a bandwidth of approximately 40%. An input TE10 rectangular mode signal is provided to the dual mode horn reflector antenna which generates a first TE11 circular mode signal from the input TE10 rectangular mode signal. A first TE10 square mode signal and a first TE01 square mode signal are generated from the first TE11 circular mode signal. The first TE10 square mode signal and the first TE01 square mode signal are combined generate a resultant signal. The resultant signal is incident upon a reflecting structure which generates an antenna pattern having approximately equivalent beamwidths in perpendicular planes, and reduced sidelobes.
25 Citations
20 Claims
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1. A dual mode horn reflector antenna having an input TE10 rectangular mode signal comprising:
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a mode transition section, said input TE10 rectangular mode signal supplied to said mode transition section, said mode transition section generating a first TE10 square mode signal and a first TE01 square mode signal from said input TE10 rectangular mode signal, said first TE01 square mode signal and said first TE10 square mode signals having approximately equal amplitude and equal phases, said mode transition section combining said first TE10 square mode signal and said first TE01 square mode signals to generate a resultant signal; a horn having a near field, said horn coupled to said mode transition section, said resultant signal supplied to said horn from said mode transition section, said resultant signal propagating in said horn and radiating from said horn; and
,a reflecting structure being located within said near field of said horn, said resultant signal incident upon said reflecting structure, said reflecting structure generating an antenna pattern from said resultant signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A dual mode horn reflector antenna having an input TE10 rectangular mode signal comprising:
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a first transition section having a first rectangular opening and a first circular opening, said input TE10 rectangular mode signal supplied to said first transition section through said first rectangular opening, said first transition section gradually transitioning from said first rectangular opening into said first circular opening generating a first TE11 circular mode signal from said input TE10 rectangular mode signal, said first TE11 circular mode signal supplied at said first circular opening; a second transition having a second circular opening and a first square opening, said second circular opening coupled to said first circular opening, said first TE11 circular mode signal supplied to said second transition section through said second circular opening, said second transition section gradually transitioning from said second circular opening into said first square opening generating a first TE10 square mode signal and a first TE01 square mode signal from said first TE11 circular mode signal, said first TE10 square mode signal and said first TE11 circular mode signals having approximately equal amplitude and equal phases, said second transition section combining said first TE10 square mode signal and said first TE10 square mode signals to generate a resultant signal, said resultant signal supplied at said first square opening; a horn having a near field, an interior free of corrugations, and a second and a third square opening, said second square opening coupled to said first square opening and smaller than said third square opening, said resultant signal supplied to said horn through said second square opening, said resultant signal propagating in said horn and radiating from said horn through said third square opening; and
,a reflecting structure being located within said near field of said horn, said third square opening of said horn being closer to said reflecting structure than said second square opening of said horn, said resultant signal incident upon said reflecting structure, said reflecting structure generating an antenna pattern from said resultant signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification