MMW electronically scanned antenna
First Claim
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1. A millimeter wave (MMW) antenna array, comprising:
- a continuous transverse stub (CTS) radiating aperture comprising a set of spaced continuous transverse stubs, each having a longitudinal extent, wherein said radiating aperture comprises a waveguide structure comprising an upper conductive plate structure defining the set of continuous transverse stubs and a lower conductive plate structure disposed in a spaced relationship relative to the upper plate structure;
an excitation source for providing excitation signals in a MMW frequency range;
a feed system coupled to the excitation source for exciting the stubs with MMW electromagnetic energy having a linear phase progression along the longitudinal extent of the stubs to produce an array beam which is scanned over a beam scan range by changing the frequency of the excitation source, wherein the feed system includes a sinuous feed network coupled to a plurality of feed elements to provide a linear progressive phase shift in the electromagnetic wave along the feed source.
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Abstract
A millimeter wave (MMW) antenna array includes a continuous transverse stub (CTS) radiating aperture comprising a set of spaced continuous transverse stubs, each having a longitudinal extent. A series feed system is coupled to an excitation source for exciting the stubs with MMW electromagnetic energy having a linear phase progression along the longitudinal extent of the stubs to produce an array beam which can be scanned over a beam scan range by changing the excitation frequency.
11 Citations
16 Claims
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1. A millimeter wave (MMW) antenna array, comprising:
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a continuous transverse stub (CTS) radiating aperture comprising a set of spaced continuous transverse stubs, each having a longitudinal extent, wherein said radiating aperture comprises a waveguide structure comprising an upper conductive plate structure defining the set of continuous transverse stubs and a lower conductive plate structure disposed in a spaced relationship relative to the upper plate structure; an excitation source for providing excitation signals in a MMW frequency range; a feed system coupled to the excitation source for exciting the stubs with MMW electromagnetic energy having a linear phase progression along the longitudinal extent of the stubs to produce an array beam which is scanned over a beam scan range by changing the frequency of the excitation source, wherein the feed system includes a sinuous feed network coupled to a plurality of feed elements to provide a linear progressive phase shift in the electromagnetic wave along the feed source. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A W-band antenna array, comprising:
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a continuous transverse stub (CTS) radiating aperture comprising a two-dimensional set of CTS subarrays arranged in rows and columns, each subarray comprising a set of spaced continuous transverse stubs having a longitudinal extent; and a feed system coupled to an excitation source for exciting the stubs with W-band electromagnetic energy having a linear phase progression along the longitudinal extent of the stubs to produce an array beam which is scanned along a first direction over a beam scan range by changing an operating frequency of the excitation source over a W-band frequency range, wherein the feed system includes a sinuous feed network coupled to a plurality of feed elements to provide a linear progressive phase shift. - View Dependent Claims (9, 10)
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11. A W-band antenna array, comprising:
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a continuous transverse stub (CTS) radiating aperture comprising a two dimensional set of CTS subarrays arranged in rows and columns, each subarry comprising a set of spaced continuous transverse stubs having a longitudinal extent; and a feed system coupled to an excitation source for exciting the stubs with W-band electromagnetic energy having a linear phase progression along the longitudinal extent of the stubs to produce an array beam which is scanned along a first direction over a beam scan range by changing an operating frequency of the excitation source over a W-band frequency range, wherein the feed system includes, for a set of said subarrays arranged end to end along a longitudinal extent of the array for each subarray of said set, and input/output (I/O) port coupled to a subarray sinuous feed network and a plurality of spaced feed elements coupled to the sinuous feed network to provide a linear progressive phase shift for excitation signals applied to the subarray, a main (I/O) port, a series arrangement of delay lines connected to the main I/O port, and a coupler arrangement for coupling an end of each delay line to a corresponding one of the I/O ports of said set of subarrays. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification