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San Antonio, Tx, Us

San Antonio, Tx, Us

Engage in the design of the wideband millimeter wave phased array using current sheet antenna element. Designed finite array to achieve wide angle scanning from broadside down close to the horizon. Design multilayer PWB manifolds with all custom power dividers. The PWB include the antenna board and the multilayer transition designs, MMIC boards, ... The array is connected directly to the MMIC chips through manifold designs to form beams through the sum and delta channels. Since the array is finite it is possible do an accurate design covered with WAIM sheet, radome, and FSS surface with HFSS simulations. Array edge effects as well as array mutual coupling can be control very well through the mutual coupling maps. Autocad was used to generate the entire array manifold. Established a capability to accurately analyze the mutual coupling effects between apertures and radiating structures in a complex antenna environment include finite arrays and multi-band antennas using a combination of PTD, UTD and FEM techniques.

Hickory, North Carolina, Us

Responsible for the design 5G active scanning phased array antenna for the 28GHz and 39GHz systems to provide a continuous coverage between -60 to +60 in azimuth. The radome and WAIM sheets were designed to minimize the beam squint as the array is swept to the edge of coverage. Designed the 3.5 GHz antenna array for a 5G design when there is a need to interleave the 5G array together with existing 3G and 4G platforms. Array finite size and edge effects were included in the analysis. The 5G arrays were designed with dual pol configurations for both transmit and receive. The array lattice spacing was optimized to move the blind spots out of the scan volume. The 28GHz array was designed using 8 transceivers. The current array design is for azimuth coverage but with larger beamwidth, the array does have some limited coverage on the elevation as well.

Washington, Dc, Us

Perform radar scatterings, co-site interferences, and radar cross section analysis of the wind farm RCS populated at installed radar sites and its effect on the target detections. The RCS analysis was taking into account the blade motions of the wind turbines and the Doppler effects of the moving parts. XPATCH software was used in the RCS analysis in the presence of windfarm clutters and other Doppler filters were also used for target identifications in case the RCS technique was unable to identify the target due to heavy clutters. Performed trade studies between the high power sources like Klystron, Crossfield Amplifier, and the solid state amplifiers.

Designed the space fed multi-flare horn array for the Patriot array radar to achieve a circular pencil beam pattern. Analyzed and resolved the effects of blind spots of the Patriot phased array using both Floquet modes and HFSS. Designed waveguide simulators to verify array scan performances. Simulate the scattering effects of the JLENS array and the ground reflection effects of the array using UTD (uniform Theory of Diffraction) techniques. Performed co-site and analyzed mutual coupling and scattering analysis between installed top deck antenna arrays for KU, SPY3, EHF and UHF, and VSR apertures. Evaluate hazardous effects like radhaz, hero, due to scattering of gun ship when ship board radars are operating at full power. Designed ram transitions for LO apertures on DD(X). Performed top level phased array system designfor the PATRIOT 360 degrees digital beam forming phased array. Performed low frequency RCS analysis of structures involving both dielectric, and metallic surfaces.Fellow Engineer, NORTHRO

Lead in the design of the air stripline corporate feed phased array. Developed interconnect techniques for multi-layer stripline. Involved in the design of the continuous stub antenna array. Managed the designed a novel SATCOM KU-KA tracking couplers. The TE10 mode was used to generate the sum beam for the KU guide and all the energy of the TE20 mode were coupled into a smaller Ka guides from the sidewalls to form the difference beam. Designed microwave component design like bends, 45-degree tilt waveguide, septum and corrugated polarizers, proximity couplers. Developed software to solve for the problem of multimode cascading techniques. Lead in the R&D efforts in the design of the multi-layer 16x16 Butler matrix feeds for the reconfigurable antenna array. Involved in the design of ROTMAN lens beam forming system. Designed reflector antennas and feeds for space borne applications. Responsible for the design of the traveling wave antennas like helices and quadrifilar antennas in L-band, S-band, and X-band. Developed feed components for reflector applications like dual mode horn, corrugated horns, septum polarizer. Also responsible for the design and analysis of the GPS antenna in the L-band, S-band, and UHF. Designed an air stripline corporate feed beam forming network for the Firefinder radar. Have strong Grasp expertise in the design of Cassegrain, Gregorian, shaped, and dual reflectors.

Msee, Antenna & Communications

Bachelor Of Science - Bs, Electrical And Electronics Engineering