RF/Microwave/Optical/Telecommunications Professional

SAMIR SHETH

**** ********* **

Plano TX *****

469-***-**** (M); 979-***-****(H); **************@*****.***

Microwave/Optical Systems Professional with extensive background in Telecommunications,

Optical Transceivers and Transmission Systems, CATV, RF/Microwave systems, and radar systems.

HIGHLIGHTS

Telecommunications

• Experienced in wireless to include RF/Microwave, Free Space Optics, and WiFi.

• Experienced in wired systems to include fiber optics, CATV, coaxial, and twisted pair.

• Systems include GPON, DWDM, SONET, Ethernet, xDSL, and CATV.

• RZ/NRZ transceiver design, DFB/FP laser circuits, LiNbO3 modulators, PIN/APD receivers.

Defense

• RF/Microwave receivers including superheterodyne, IFM, and channelized receivers

• Gain-Budget, Spurious, IP3 Analysis; Filter Design; Frequency Synthesizers: PLL design

• Microwave circuits including filters, amplifiers, equalizers, and synthesizers.

• Radar simulation systems for mechanical scanning, phased array, and CW radar.

Management

• As CTO/VP Engg led a team of 20 professionals to develop a complex wireless system.

• Defined engineering processes based on Mil-STD-499B including design, part numbering,

Bugzilla defect reporting, and Agile documentation system. Developed manufacturing

processes for a high tech wireless system with high yield from limited production to GA.

• Met regulatory standards including CSA/UL, FCC, CE, CB, IP-45, IEC Class 1 laser safety.

Patents (www.linkedin.com/in/samirsheth24)

Patent # Description

7782778 Fiber Channel Distance Extension in a Transport System

7729617 Flexible, Dense, Line Card Architecture

7656905 Apparatus and Method for transport of Gigabit Ethernet and Packet Formats

7603042 Apparatus and Method for optimum decision threshold setting

7164692 Apparatus and Method for 10 GigE Lan signals over a transport system

8155519 Flexible, Dense, Line Card Architecture – Channel Verification

8208814 Calibration system and method for manufacturing optical transceivers

8223795 Apparatus and Method for transporting LAN signals over a transport system

EXPERIENCE

2009- Present SkyFiber Plano TX

CTO/VP Engineering

• Sucessfully achieved trials with emerging market carriers to deploy optical wireless

(India, Mexico, Africa, Phillipines).

• Initiated technical strategy, technical marketing, solutions engineering, regulatory

oversight, business development, cost reduction, and manufacturing process design.

• Architected FSO system with FEC, active tracking, and integrated switch to support

IP networks with QoS (802.1p), VLAN switching/routing (802.1Q) and protection.

• Designed protection system to 802.11n WiFI radio for high availability in weather.

• Designed a beam steering system for cell towers to support the mobility backhaul

market. The system uses high speed electro-mechanical scanning to enable rapid

tracking on towers at rates exceeding 14 mrad/sec to compensate for twist/sway.

• Principal author of patent for rapid active tracking in a wireless optical system.

(Application:US20120308239). International PCT approval received.

• Led a 20 person multi-functional design team to develop a Gigabit Ethernet FSO system.

• Developed a low cost last mile GigE wireless optical system with certifications

including FCC, CE, CB, CSA/UL, IEC Class 1 laser safety, IP45/Type 3R outdoor

• Designed 1.25/2.5 Gbps transceiver with Fabry Perot Laser, Laser driver, and APD

receiver with integrated optical filter for stable free space propagation.

2005 – 2006 Siemens Communications (GPON group), Dallas TX USA

2006 - 2009 TXP Corp (Siemens group sold to TXP)

Principal RF and Optical Engineer

• Developing state of the art GPON systems for US and International markets.

• Developed dual loop control optical transceivers that include RF overlay. This consists of a

DFB laser, laser driver, PIN/APD photoreceivers, PIN video receiver, control and calibration.

• Awarded patent 8208814 for ONU transceiver self calibration and manufacturing method.

• Designed CATV receiver with AGC, Gain Adjust, RSSI, and RF level monitoring. Designed

impedance matching networks for simultaneous operation of low distortion digital

transmission of CATV channels, RF return, and HPNA (EVM<1% distortion).

• Developed method to enable transmission of multiple CATV return channels over GPON.

• Performed reliability calculations to determine MTTF for warranty calculations.

2001 - 2005 Celion Networks, Dallas TX

Principal Analog Engineer

• Developed line card architecture for an 80 wavelength (50 GHz) L-band DWDM system.

• Led design team of 10 people towards development of a complex 12.5 Gbps transceiver card.

Developed a top down system design that segregated functional module partitions, space

allocation and mechanical design, power consumption and thermal design, cost analysis, and

high speed connectivity. Achieved first pass success on 80% of the cards developed.

• Developed a 12.5 Gbps line card with low dispersion (linear) amplification, RZ modulation,

precision wavelength and power control, LINbO3 modulator bias control and AGC.

• Developed OC192, OC48 SONET, 10GE/4xGE, and Fiber Channel Line Cards.

• Designed high-speed communications interfaces that included enhanced FEC, SONET

compliant low jitter phase-locked tracking filters, SERDES, and dynamic threshold control.

• Developed fiber channel storage area network extension method using high-speed SRAM

credit buffering to enable synchronous mirroring of SAN over distance.

1999 - 2001 Siemens Communications (formerly Efficient Networks), Dallas TX

Promoted to Principal Engineer

• xDSL modem design, electromagnetic compliance, and system engineering.

• Designed Analog Devices and Alcatel based ADSL modems for an integrated access device.

• Analyzed performance limits of ADSL modems in twisted pair noise environment

1998-1999 Raytheon Systems Company (TS-SBI), Garland TX

Senior RF Engineer

• RF receiver design, analysis, and algorithm development for high reliability systems.

• Analyzed/ evaluated receiver architectures using HPADS for optimum detection

• Calculated phase error resulting from local oscillator phase noise in a SIGINT receiver.

• Analyzed/measured performance of cavity backed spiral antennas for direction finding

• Performed analysis/developed algorithms for signal detection with a broadband receiver.

• Analyzed materials and designed antenna radome for space environment

1997 - 1998 Harris Corporation (TS-SBI), Melbourne FL

Senior RF Engineer

• Developed high performance, low cost, 25 channel 750 to 1250 MHz dual conversion

receiver for precision SIGINT application Used HP OMNISYS simulation and layout tools to

design highly linear, Amplitude/phase tracking receivers on microstrip

• Built 8 channel downconverter system for connection to an antenna array. Achieved

precision amplitude matching within 1 dB and phase tracking within 4 degrees to enable

detection of angle of arrival and other relevant signal intelligence.

• Process included conceptual design, receiver architecture selection, spurious analysis, gain

budget/noise figure/IP3 analysis, thermal design, and physical design

1989 – 1997 EG&G Special Projects (TS-SBI), Las Vegas NV

Senior Radar Systems Engineer

• Developed radar equipment and SIGINT receivers. Radars included mechanical scanning,

phased-array, and CW radars. Receivers included superheterodyne, IFM, and channelized.

• Designed radar simulation systems to simulate targets and fire control functionality.

• Designed x-band RF modulator, analog synchronization circuits, and boresite Equipment

• Provided system engineering support including analysis of radar systems including

phased-array, monopulse, and CW radars for target acquisition and fire control

• Manager/team lead for a 100 MHz to 6 GHz sensor for high power signal measurement.

Developed unique time domain network analysis algorithms for high power and UWB signal

detection. Successfully delivered government contract on schedule & budget.

• Designed 500 MHz to 6 GHz channelized receiver system for SIGINT application

Developed time domain detection algorithm to detect sub nanosecond pulsewidth signals

• A portable 500 MHz to 16 GHz low power, RF sensor system for pulsed signal acquisition.

1985 – 1989 Magnavox Electronic Systems Company, Ft Wayne IN

Electrical Engineer

• RF/microwave circuit design, transmitters and receivers for sonobuoy and ECM applications

• Designed low cost 300 MHz (UHF) receiver and antenna for sonobuoy communications.

• Developed 16 GHz, high-speed, direct modulated, 1.3 um fiber optic link

• 60 KW, UHF transmitter consisting of grounded grid, triode amplifier, isolator and antenna.

• 6 to 18 GHz microwave cable equalizer circuit on alumina

• Modified a 136 to 173.5 MHz, 100 channel synthesized transmitter for power efficiency.

EDUCATION

BSEE, Virginia Polytechnic Institute and SU, Blacksburg, VA, 1983

• Coursework in RF design, fiber optics, and digital design

• Graduate classes in microwave engineering and active microwave circuits

• Short courses in RF design, radar, phased arrays, and wireless digital communications.

References Available Upon Request (see LinkedIn page for references)

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