Switched beam antenna architecture
First Claim
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1. An array antenna comprising:
- a first plurality of antenna elements disposed to provide a transmit antenna;
a butler matrix beam forming circuit having a plurality of antenna ports and a plurality of switch ports with each of the antenna ports coupled to ones of said first plurality of antenna elements; and
a first switched beam combining circuit having an input port and a plurality of output ports, each of the output ports coupled to a corresponding one of the plurality of input ports of said butler matrix beamforming circuit.
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Abstract
A multiple beam array antenna system comprises a plurality of radiating elements provided from stripline-fed open-ended waveguide coupled to a Butler matrix beam forming network. The Butler matrix beam forming network is coupled to a switched beam combining circuit. The antenna can be fabricated as a single Low Temperature Co-fired Ceramic (LTCC) circuit.
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Citations
8 Claims
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1. An array antenna comprising:
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a first plurality of antenna elements disposed to provide a transmit antenna;
a butler matrix beam forming circuit having a plurality of antenna ports and a plurality of switch ports with each of the antenna ports coupled to ones of said first plurality of antenna elements; and
a first switched beam combining circuit having an input port and a plurality of output ports, each of the output ports coupled to a corresponding one of the plurality of input ports of said butler matrix beamforming circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification