Search Results - "Duffy, Sean M"

Impact of water loss on sustainability of the Mississippi River channel in its deltaic reach by Allison, Mead A., Meselhe, Ehab A., Kleiss, Barbara A., Duffy, Sean M.

“…The Mississippi River channel from New Orleans to the Gulf of Mexico (GOM) is a key deep draft navigation channel and an active deltaic lobe. Natural and…”
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Accurate modeling of dual dipole and slot elements used with photomixers for coherent terahertz output power by Duffy, S.M., Verghese, S., McIntosh, A., Jackson, A., Gossard, A.C., Matsuura, S.

“…Accurate circuit models derived from electromagnetic simulations have been used to fabricate photomixer sources with optimized high-impedance antennas. Output…”
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Multi-lithic phased array architecture for airborne sense and avoid radar by Duffy, Sean M., Brigham, Glenn A., Newman, Kevin S., Bell, Patrick J., Santiago, Daniel D., Tobin, Sean M., Herd, Jeffrey S.

“…Transmit and receive Ku-band phased array designs are described for testing an airborne sense and avoid radar. The arrays are small with a size of 24 cm × 9 cm…”
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An enhanced bandwidth design technique for electromagnetically coupled microstrip antennas by Duffy, S.M.

“…This paper describes a method of enhancing the bandwidth of two different electromagnetically coupled microstrip antennas by utilization of a tuning stub. An…”
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Stepped notch antenna array used as a low thermal resistance heat sink by Duffy, Sean M., Brigham, Glenn A., Newman, Kevin B., Herd, Jeffrey S.

“…A stepped notch antenna at Ku-band is developed to provide a thermal heat sink for active arrays. The antenna with forced air cooling provides up to 0.4 °C/W…”
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A circuit-fed tile-approach configuration for millimeter-wave spatial power combining by Gouker, M.A., Delisle, J.T., Duffy, S.M.

“…In this paper, a circuit-fed spatially combined transmitter array is described for operation at 44 GHz. The array contains 256 elements where each element…”
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High combining-efficiency X-band spatial power-combined array using a multilayered packaging architecture by Duffy, S.M., Gouker, M.A.

“…The design of a high combining-efficiency spatial power-combined array is described in this paper. A multilayered stacked stripline architecture enables a…”
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Results of X-band electronically scanned array using an overlapped subarray architecture by Duffy, Sean M, Willwerth, Francis, Retherford, Larry, Herd, Jeffrey S

“…The measured results from an X-band electronically scanned array using an overlapped subarray architecture are presented. The 2D architecture uses a 12×12…”
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A 16-element subarray for hybrid-circuit tile-approach spatial power combining by Gouker, M.A., Delisle, J.T., Duffy, S.

“…Three designs for a 4-by-4 subarray are described for use in a spatial power-combined transmitter. The subarrays are constructed using a hybrid-circuit,…”
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Unmanned aircraft sense and avoid radar: Surrogate flight testing performance evaluation by Owen, Michael P., Duffy, Sean M., Edwards, Matthew W. M.

“…Unmanned aircraft systems (UAS) have proven to have distinct advantages compared to manned aircraft for a variety of tasks. Current airspace regulations…”
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A dual-band circularly polarized aperture-coupled stacked microstrip antenna for global positioning satellite by Pozar, D.M., Duffy, S.M.

“…This paper describes the design and testing of an aperture-coupled circularly polarized antenna for Global Positioning System (GPS) applications. The antenna…”
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Empowering Community Health Workers With Mobile Technology to Treat Diabetes by Duffy, Sean, MD, Svenson, Jim, MD, MS, Chavez, Alejandro, Kelly, Mark, Wise, Paul, MD, MPH

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Design considerations and results for an overlapped subarray radar antenna by Herd, J.S., Duffy, S.M., Steyskal, H.

“…Overlapped subarray networks produce flat-topped sector patterns with low sidelobes that suppress grating lobes outside of the main beam of the subarray…”
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45-GHz MMIC power combining using a circuit-fed, spatially combined array by Delisle, J.T., Gouker, M.A., Duffy, S.M.

“…We describe the design and measurement of a hybrid-circuit, tile-approach subarray for use in spatial power-combined transmitters. The subarray consists of 16…”
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A lower incidence of gynecologic adverse events and interventions with anastrozole than with tamoxifen in the ATAC trial by Duffy, Sean R., MD, Distler, Wolfgang, MD, Howell, Anthony, MD, Cuzick, Jack, PhD, Baum, Michael, MD

“…Objective Results of the Arimidex, Tamoxifen, Alone or in Combination (ATAC) trial have shown that tamoxifen is associated with a significantly higher…”
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Design of overlapped subarrays using an RFIC beamformer by Duffy, S.M., Santiago, D.D., Herd, J.S.

“…Electronically scanned arrays require a minimum number of controls, N min , given by the number of orthogonal beams that fill a prescribed scan sector (R…”
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Integrated compensation network for low mutual coupling of planar microstrip antenna arrays by Duffy, S.M., Brigham, G.A., Herd, J.S.

“…This paper presents design of low mutual coupling arrays with some of the concepts formulated by Hannan and Amitay of interconnections between antenna…”
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Ultra-Wideband Step Notch Array using stripline feed by Brigham, G.A., Davidovitz, M., Duffy, S.M., Herd, J.S.

“…The novel stripline feed design operates as claimed. This new feed design will allow integration of vertical 3-D TEM wideband notch array to a PCB. The…”
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A multilayered packaging architecture for spatial power combined arrays by Duffy, S.M.

“…The explosion of interest in high data rate communications places great demands on antenna designs. Antennas used for transmitting signals can require high…”
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An in vitro uterine perfusion model for investigating endometrial cryoablation by Bodle, Julia F., MD, Duffy, Sean R.G., MD, Binney, David M., MMedSci

“…Abstract Study Objectives To build a simple in vitro uterine perfusion model for investigating the clinical effectiveness of endometrial ablation. Design…”
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