Engineer Design
Resume:
HOUSHANG AGHAHASSAN
Saratoga, Ca, 95070
408-***-**** (H)
669-***-**** (C)
acs3hy@r.postjobfree.com
OBJECTIVE
CMOS, BJT or BiCMOS Analog, Mixed-Signal, RFIC
EDUCATION
MSEE, Lund University, Lund Sweden, 1990
SKILLS
Solid background in RF hardware low/high power, radio-frequency RF/Analog circuit design and analysis
Experience in wireless communication system such as front end, transmitter architecture and parameter selection, especially circuit design such as Power Amplifier, Mixer (MODULATOR), LPF (low Pass Filter) PGA (programmable Gain Amplifier) or voltage gain amplifier, VCO, Low noise amplifiers LNA, DC-offset cancellation, AGC, LDO, BG and OpAmp etc. for use with RFIC designs
Proficient and innovative design of all transceiver from converter to the antenna for Varity of wireless communication such as Wifi, Super-wifi, WiMAX, LTE, UWB, Zigbee Power Amplifier (20, 30dBm), 802.11abg and GPS.
Experience with PCB for prototype design to test PA and RFIC.
Experience in ESD, packaging and board technology.
Extensive experience in “ADS”, ”HFSS” and “CADENCE Specter-RF” to simulate, design and implement a range of RFIC Designs“ =Superstar= Professional” and “pspice” to simulate and design all part of RF circuitry.
Able to work together with other engineers and individuals to solve and define the developmental problems.
Excellent communication and organization skills.
WORK HISTORY
2015-present QUALCOMM: Senior Application Engineer - San Jose, CA
Responsibilities:
As the technical support lead, ensure successful integration of 802.11 WLAN, Bluetooth, and GPS products into mobile, PC, and consumer electronics. engaged with a customer to design PCB for application platform, be able to map out the technical details of a system integration plan, from project start through mass production. Working with various instruments, such as Litepoint (VSA,SGA), (VSA,SGA), for performance measurement of different Tx / RX modulation skim like 802.11 a,b,c, n, spectrum analyzer, logic analyzer, VSA, and scopes., including managing customer issues, technical design support, document/information release process.
2013-2015 Canopus system (Title Senior RFIC Design Engineer)
Working with 30 engineers to integrate hardware in satellite system, the primary application of satellite’s payload is Earth imaging, so the architecture is oriented around the collection, filtering, storage, retrieval, and transmission of image data, my rolls was to Develop and implement RF solutions for radio in Ka-Band for data transmitting, UHF radio for control and communication and ensure the RF component / any radio with sub blokes meeting the spec: RF power amps, DROs, mixers, filters, matching networks to antenna, etc, to do so it needs schematic and layout through PCB design.
To get best RF performance testing Using bench equipment; network/spectrum/vector analyzers, oscilloscopes, power meters, RF amps, etc.
Tuned UHF (400 MHz) Antenna and measure gain, antenna pattern test and input matching of antenna.
Measured horn antenna for Ka-Band (26.8 GHz).
2012-2013 HMICRO (Title Senior RFIC Design Engineer)
Designing transceiver for medical market based on Wifi and UWB technique, my responsibility was design receiver from antenna to ADC interface and 32kHz oscillator for standby mode to generate clock for digital and do layout work for some of blocks.
To prepare for testing we designed PCB and after testing of RF hardware works as expectation.
Tools:
RF Specter Cadence V6.1 to do simulation and extraction, ADS for system simulation (link budget simulation)
Frequency was 2.4GHz at RF and bandwidth of baseband 5MHz.
2011-2012 Pixel Sand Inc (Title Senior RFIC Design Engineer)
To design and perform a power amplifier 20dBm for Zigbee application with layout design at ADS. (Process: SOI tower Jazz) and design PCB for testing of PA.
To develop an efficient power Amplifier 30dBm for Zigbee application (Process: SiGe tower Jazz).
Tools:
ADS to do in/output matching and inter-stage matching, do momentum simulation for BALUN.
Frequency range was 2.4GHz.
209-2011 Aviacomm (Title Senior RFIC Design Engineer)
Developing Supper-Wifi. it covers from 300MHz to 3GHz for Google requirement. The design challenge was both in transmitter and receiver especially in so large Bandwidth, high requirement in linearity, dynamic gain rang, adaptive filtering . Most of the work was to improve linearity of transmitter stage and improve receiver noise figure in so wide bandwidth rage.
Tools:
RF Specter Cadence V6.1... to do simulation and extraction and layout, ADS for system simulation, linearty and EVM performance of transceiver (link budget simulation) and for testing of RFIC we designed PCB.
Frequency was from 300MHz to 3GHz at RF and bandwidth of baseband was adaptive from 1.25MHz to 10MHz.
2005-2009 UMC (Title Senior RFIC Design Engineer)
To develop UWB transceiver. The transmitter blocks were: Power Amplifier with 16 dB dynamic range with P1dB compression of 4dBm, IQ modulator with LO-cancellation, LPF (3rd order Chebyshev gmC filter), Buffer and the band gap reference that deliver sufficient current and voltage to the LNA receiver, Modulator, LPF (5th order gmC filter), PGA (with DC offset cancelation), Buffer. The process was 0.13um UMC at 1.2Volts.gt
To test performance of IC we design PCB.
Accomplishment:
The first transmitter tapeout was successfully meeting measurement spec (measurement result can be present).
Receiver was functional %80 after first tapeout.
WiMAX-project: to design LNA, Mixer and PA in UMC process for validation of UMC’s process in 65nm. After tapeout all three blocks were packaged and measured and measurement result was successful (measurement result can be present).
Tools: Cadence, Spectres-RF, Extraction (Assura-RF, Calibre)
2000- 2005 Insilica, Inc. (Title: Senior Staff Engineer)
Responsibility: transmitter and receiver (back-end) design for beam forming 802.11a,b,g.
Transmitter: to design a one stage power amplifier P1dB 10dBm with power control of 38dB, IQ Modulator with power control of 38dB, LPF (3rd order Chebyshev active RC low pass filter with automatic tuning for process variation), and a crystal oscillator (OSC)
To design Back End in receiver IQ modulator, LPF(5th order Chebyshev active RC low pass filter with automatic corner frequency tuning for process variation), and PGA
Accomplishment:
Completed transmitter test key and performed some probe measurements and results were very good.
Tools: Cadence, Specter-RF, Extraction (Assura-RF)
Process: TSMC 130nm.
1990- 2000 Ericsson Radio System AB (Title: Design Manager)
Characterization of SiC transistor and methodology to design a Power Amplifier in SiC.
To integrate most of the linearization of a power amplifier in SiGe BJT process.
To design a linearization IC for EDGE power amplifier with other Ericsson team members (SiGe, BJT).
Accomplishment:
To design the gain RF-Switch to switch between two synthesizer in GSM basestation; this design is in production (Ericsson BJT process).
Tools: Cadence, Specter-RF.
ADS (Advanced Design System).
To design and perform the linearization of a power amplifier
To develop an efficient means of RF power amplifier circuit for GSM, NMT and TACS products for European market.
Tools: Cadence, Specter-RF, extraction.
RELATED COURSES
1993EEsof Training Course
1994Diplomas from catena. (High Efficiency Amplifiers for Wireless Communications)
1995Power Amplifier Design on EEsof "E-Syn"
1996Radio Microwave and Mentor Graphics
1997ASIC Design on CADENCE
1998Electronic Circuit Design
1997Transmitters and Receiver Circuit Design for Wireless Communication
1998Specter-RF
1999HP ADS
2000Low Power analog and mixed-signal ICs
RELATED EXPERIENCE
Extensive experience in most kinds of lab instrumentation.
MCPA (Multi Carrier Power Amplifier) for use with 1.5GHz and 25Watt.
SWR Detector with temperature compensation.
ESD and Pad-Ring.
References Available Upon Request
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