Engineer Design

Alireza Shooshtari

*** ****** **

Allen, TX

***** ***

Email: ********@*****.***

phone: 585-733- 6315

QUALIFICATIONS

More than 16 years experiences and proficiency on design of different antennas and microwave passive components such as Base station antennas, Printed dipoles, Microstrip patch antennas, Yagi-Uda antennas, Wide Bandwidth Monopoles antennas for LAN applications, filters, diplexer and waveguide circulator.

Experiences on design of Coaxial and dielectric resonator filter by using Mutual Coupling synthesis for irises or capacitive coupling, and Group delay analysis for Input/output coupling

Experiences in microwave commercial software such as: Ansoft HFSS and Ansoft Designer, ADS Agilent, Grasp TICRA, mwave Mician, IE3D and WaspNet.

Experiences on developing software and numerical programming (Fotran, C and Matlab) for analysis and design of high frequency antennas using GTD, physical optics and combination of GO and moment method.

Highly experienced on RF system analysis: Link Budget and Noise Figure analysis

Experiences in Test of far field and near field antenna patterns, gain and cross and co-polarization patterns measurement.

Experiences in Beam forming for base station mobile communication.

Inclusive knowledge of different types of digital modulation and coding schemes, IEEE 802.11a,b,g, Pre-N and IEEE802.16 protocols, smart antenna and MIMO technologies for WLAN.

EMPLOYMENT

Sep.2013-Now, Principal Antenna Engineer, Commscope, Dallas,TX

Design of various components of Multiband base station antennas including radiating elements for 694-960MHz band and 1695Mhz-2690MHz band covering all AWS, PCS and LTE.

Publishing two application patents for solving issues of LB and HB pattern in multiband antennas.

Technical leader of RV65A and RVV65A with 300mm package 4 feet length multiband board band antenna. Carried out the complete development life cycle up to prototype fabrication and lab and field tests. The antenna demonstrated outstanding characteristics in terms of XPD, SLL and return loss and PIM.

Technical leader of lensed antenna for multi beam application. issuing one IP application on beam width stability in lensed antennas.

Technical leader of solving PIM issues in different products

Feb.2012-Sep.2013, Senior Antenna Engineer, Quintelsolutions, Rochester,NY

Design of base stations antenna, including: phase shifters with air dielectric transmission line technology

Designing Quintel Beam forming network for 8 feet anteanns

Design of Different elements in low band and High band.

OCT.2010-Feb.2012 different Telecommunication companies as consultant in Canada Montreal

Sep.2008-Oct.2010 Senior RF Engineer, Filtel Microwave Inc. Montreal, Canada

Design and project manager of following microwave devices:

Waveguide Diplexers 7-38 GHz for Different companies Dragonwaves, ITS-Electronics, Huawei Microwave Network inc.

Coaxial Diplexer at 7GHz for Dragonwave and waveLab companies. Design was performed by mutual matrix synthesis for irises and group delay analysis for input/output coupling.

Broadband spurious free filters at 15GHz using low pass filter

Stripline and waveguide circulators 1GHz-40GHz

Orthogonal mode transducer OMT 10-11GHz and its combination with phase shifter for separation of LHCP and RHCP signals.

Waveguide Coupler ( Hot standby coupler: three ports coupler) 5-38GHz .

DEC 2007-Sep.2008 Senior Antenna Engineer, TenXc Wireless Inc. Ottawa, Canada

Involved in design and fabrication different types of patch and dipole antennas for 900 and 1800 MHz bands with HFSS/IE3D. Innovative low loss, compact and low cost printed circuits are designed for both dual band and wideband applications

Simulated and designed elevation PCB beam-formers for 900 and 1800 MHz applications. This includes design of different types of power dividers (Wilkinson, Directional coupler and, T-split) matching circuits. hybrids and Butler matrices. The designs were optimized for achieving low return loss and SLL.

Designed and optimized innovative rotary phase shifters for variable tilt antenna applications at 900 and 1800 MHz bands. Through daily interaction with mechanical engineers the design resulted in a very compact, robust low loss and cost effective elevation feed network in both GSM and AWS bands.

Designed and implemented a variety of efficient cable to PCB launches with tangible effect in finished products cost reductionsImplemented a system model for the whole base station antenna with Matlab. The model included antenna elements (with mutual coupling) as well as azimuth and elevation feed networks. This model extensively has been used in optimizing side-lobe level and gain and performing sensitivity and fault detection analysis.

2004-2007 Senior Researcher, Concordia University, Montreal, Canada

Research and development on Electromagnetic bandgap structures and their application in antenna application.Research on Electromagnetic Scattering by regular dielectric and metamaterial using TICRA Grasp software and my own program. More information in published papers.

Design of agile antenna with reconfigurable pattern using Electromagnetic band bandgap: design is based on Beamforming a phased array microstrip antenna. Phase shifter was designed by using an Electromagnetic bandgap.

2001-2004 Senior Optical Design Engineer,

Lumenon Innovative Lightwave Technology, Montreal, Canada

Design of laser circuit driver for CWDM optical fiber system.

Design of passive integrated optical components such as Array waveguide grating, Interleaver and optical power splitter with polymer materials

Coarse Wavelength multiplexing (CWDM) for Metro application (4x 2.5Gb/sec) combination of four 2.5Gb/s lasers beams

1999-2001 Senior Associate Research Officer, University of Essex, UK

Research on microwave components for wireless communication GSM1800: Dielectric Resonator Microwave filter, Advanced asymmetric Dielectric filters

Test and measurement of Microwave equipments.

Developing a program for computing mutual coupling for asymmetric filter

1998-1999 Senior Design Engineer, Telecommunication Industrial Inc., Tehran

Designer of Dielectric resonator filter.

Contribution on Design of base station antenna GSM 900

Electronic circuits designs: low noise amplifiers, High power amplifier for GSM 900 mobile communication

1997-1998 Researcher, Ecole polytechnique de Montreal, Montreal, Canada.

Research on active and passive optical components, Erbium doped waveguide amplifier

1996-1997 Lecturer, Telecommunication Education center, Tehran

EDUCATION

1994-1998 Ph.D Electrical Engineering, Tehran University, telecommunication.

Ph.D thesis: Design, Analysis and fabrication Erbium Doped Planar waveguide amplifiers and lasers. (A novel electromagnetic technique for nonlinear active media)

1990-1994 MSc., Electrical Engineering, Tehran University, Telecommunication

MSc project Title: Analysis and design of Microstrip array antennas using moment method in spectral domain.

1986-1990 BSc., Electrical Engineering, Tehran University, Telecommunication

BSc project: design of Yagi-Uda antenna using moment method.

Patents and Selected Publication on Microwave, Antenna, Optical Active and passive Devices

Patent: A.Shooshtari, P.Bisiules, M. Zimmermann, “Low common Mode resonance Multiband radiating array” patent application 2015

Patent: A. shooshtrai, P. Bisiules” Full wave Dipole array having improved squint performance” pantent application 2015.

Patent: A. shooshtari and Igor Timofeev, :”Beam width stability in lensed antennas” patent application 2016

More information about these patents available upon request.

Patent: Alireza Shooshtari, Shahram Alavain and Taher Touam, CA 2328642,Lumenon innovative lightwave Tech. 2002 Canada “Sol-Gel organic-inorganic glass dense wavelength division multiplexer,”

Patent: Alireza Shooshtari, Shahram Alavain and Mark. P. Andrews, CA 2315460,,Lumenon innovative lightwave Tech. 2004 Canada 2002 " Flattering the response of a planar wavelength division multiplexer using a Y-junction,"

A.Shooshtari, A. Sebak, ”Electromagnetic scattering by parallel metamaterial cylinders,” PIER 57, page 165-177, 2006

A.Shooshtari, M.Manteghi and S.Safavi-Naieni," A Leaky transmission line method for analysis of Microstrip Antennas," IEEE APS-99, Antenna and propagation Symp. Montreal Canada, pp.1138-1141, 1997.

Shooshtari and M. Manteghi," Analysis of Annular ring microstrip patch antennas using modified Green functions," Iran Conference on Electrical Engineering, University of Tehran, May 13-16 1996, pp.121-128.

M.Manteghi, S.S.Safvi-Naieni, A.Shooshtari,," A microstrip patch antenna with a U-shaped ground plane for personal communication handset," Asia-pacific Microwave conference, APMC'96-pp.1129-1131,1996.

F.Arazm and A.Shooshtari, "Vector analysis of reflector Fresnel zone plane antenna," Faculty Engineering Magazine, Tehran University, 1996, vol.25, pp.37-39.

F.Arazm and A.Shooshtari, " Fresnel zone plane as a receiver antenna," Faculty Engineering Magazine, Tehran University, 1996, vol.24, pp.50-58.

A.Shooshtari, “Birefringence behavior of low temperature processed polymer optical waveguides and its application,” submitted to SPIE optical engineering 2007.

A.Shooshtari, P.Meshkinfam, T.Touam, M.P. Andrew and S.I. Najafi," Ion Exchanged Er/Yb Phosphate glass waveguide amplifiers and lasers," SPIE Optical Eng., 1998, vol.37, no.4, pp.1188-1192.

A.Shooshtari T.Touam, S.I. Najafi, S.Safavi-Naeini and H.Hatami-Hanza "Yb3+ sensitized Er3+-doped waveguide amplifiers: a theoretical approach," Optical and Quantum Elec. vol.30 (1998) 249-264.

A.Shooshtari, T.Touam and S.I. Najafi, "A beam propagation method for analysis of Er-doped planar devices," SPIE Optical Engineering,vol.39, no. 3,pp.735-738, 2000.

S. I.Najafi, T.Touam and A.Shooshtari," Erbium Doped Waveguide amplifiers”, 9th Cimtec-world Forum on New materials, Symposium X- innovative Light emitting materials (Invited Paper), 1999, pp191-196.

A.Shooshtari, P.Meshkinfam, T.Touam, M.P. Andrew and S.I. Najafi," Ion Exchanged Er/Yb Phosphate glass waveguide amplifiers and lasers," SPIE Photonics West conference on Integrated Optics devices II, San-Jose, 24-30 Jan 1998.

K.Niayesh, J.Nayyer, A.Shooshtari, and S. Safavi-Naieni," An intersecting curved electrode for reflection -type optical switch modulator," Asia-pacific Microwave conference, APMC'96, pp.1134-1140, 1996.

References available on request

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