Coherent Clocking in Digital Arrays Navy SBIR FY2006.2 Sol No.: Navy SBIR FY2006.2 Topic No.: N06-164 Topic Title: Coherent Clocking in Digital Arrays Proposal No.: N062-164-0376 Firm: MHI Consulting LLC 22 Sulfrian Road New Providence, New Jersey 07974 Contact: Mihai Banu Phone: (908) 464-6893 Abstract: We propose to solve the multi-point coherent-sampling problem in this solicitation by using our new clock distribution technology. Invented for multi-GHz VLSI clocking and beam-steering antenna array synchronization, our technique has substantially lower cost, lower power, better phase precision (skew) at the delivery points, and lower jitter than conventional corporate feed distribution systems. In addition, it is fully compatible with conformal applications, since it does not require any spatial uniformity or symmetries for proper operation, unlike tree networks. We use a serial architecture with transmission line connectivity between clients and a simple signaling method, which carries absolute timing information to any place along the chain. Not only that our method is capable of inexpensively and accurately distributing a high frequency clock signal but in certain implementations it delivers synchronous signals to the clients at twice the transmitted frequency. At the client points, we extract the absolute timing information with simple, classical circuits. In the case of sampling arrays, we have the capability of distributing a very high frequency sampling clock, which would be used directly by the client samplers without the need for local frequency multiplication for optimum jitter performance. Benefits: Our new RF synchronization method is a general technique with multiple potential applications. A current focus is the introduction of our technology to active arrays for commercial, military, and government applications. The value proposition of our technology is the possibility of building high quality arrays with less complex and more reliable hardware. This translates into weight, power, and cost savings. In addition, our technology is compatible with conformal applications. We believe there is a substantial market interest for such advancements. For example, developing inexpensive adaptive antennas would accelerate their introduction into cellular communication systems, with dramatic improvements in coverage for heavy interference areas. Similarly, airborne radar manufacturers are under constant efforts to reduce the weight and power dissipation of their systems. Highly directional surveillance systems would also benefit from our techniques. In addition, we mention that our RF synchronization scheme relies on a principle we invented for VLSI clocking. If demonstrated successfully, this will be a disruptive technology in the semiconductor industry enabling faster IC clocking and simplified VLSI design methodology. Return