Wideband Multi-Channel AESA Manifolds

Award Information
Agency:
Department of Defense
Amount:
$80,000.00
Program:
SBIR
Contract:
N68335-10-C-0255
Solitcitation Year:
2010
Solicitation Number:
2010.1
Branch:
Navy
Award Year:
2010
Phase:
Phase I
Agency Tracking Number:
N101-020-2176
Solicitation Topic Code:
N101-020
Small Business Information
Applied Radar, Inc.
210 Airport Street, Quonset Point, North Kingstown, RI, 02852
Hubzone Owned:
N
Woman Owned:
N
Socially and Economically Disadvantaged:
N
Duns:
041546834
Principal Investigator
 William Weedon
 CEO
 (401) 295-0062
 wweedon@appliedradar.com
Business Contact
 Michael Sherry
Title: President
Phone: (401) 295-0062
Email: msherry@appliedradar.com
Research Institution
N/A
Abstract
Multi-channel array manifolds are required for wideband AESA applications. In modern solid-state AESA arrays, MMIC-based T/R modules generally utilize digitally-controlled phased shifters to steer the beam on transmit and receive. The given phase value is only accurate at one frequency, and so for wide bandwidths of several hundred MHz (at X-band for example), the beam does not get formed properly and significant dispersion is encountered, particularly at wide scan angles. This may be avoided by using multiple frequency-overlapped pulses, where the MMIC phase shifters are adjusted for the different frequency pulses, and combined digitally. Alternately, time-delay compensation may be used in a multi-beam system such as a Rotman lens or a Blass matrix. Monopulse sum/difference processing may also be replaced with multi-beam processing in this case. Such a beamforming network may be readily implemented in stripline circuitry, and Applied Radar has both the design tools and experience to implement such a design. Applied Radar recently implemented a 3x8 Blass matrix at X-band, which may be used as the basis for this design. Combining the beamformer manifold outputs into a switch matrix fed to three parallel receivers is also readily accomplished. Applied Radar proposes to design the multi-channel wideband AESA manifold in Phase I, and build and test a prototype in Phase II.

* information listed above is at the time of submission.

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