RF engineer

Johan F. Ramirez

*** ************ ***, *******, ** 19067

Mobile: 267-***-****

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

ENGINEERING QUALIFICATIONS: RF Engineer of nine years’ experience in hardware electrical

design, development and test of radiation hardened high reliability RF, microwave, and mixed signal hardware for

Space Flight Communication Payloads. Experienced in the art of RF and electronics troubleshooting, and risk

mitigation through generation (or review) of worst case and stress analysis. Successfully conducted planning, design,

and certification of components to meet customer requirement, utilizing customer regulatory practices and procedures.

EMPLOYMENT HISTORY

RF engineer 2005 - Present

Employer: Lockheed Martin Space Systems

100 Campus Drive, Newtown, PA 18940

Responsible engineer for several RF boxes for Space Flight communications payloads such as Ka-Band LNAs, Power

Dividers, RF Filters and Receivers. Hardware electrical design and development of radiation hardened high reliability

RF, microwave, and mixed signal hardware for Space Flight communications payloads.

My responsibilities include:

• Lead the design and development of radiation hardened high reliability RF/microwave hardware

• Development of RF boxes specifications, test procedures and engineering reports

• Performance of trade analyses, circuit analysis, worst case analysis, stress analysis and RF cascade analysis

• Test/Validation of performance of deliverable RF/microwave products

• RF products performance presentation to customers such as preliminary design reviews and critical design

reviews

• Research and studies of MMIC LNAs (Wideband LNAs 3GHz to 50 GHz, Ku-band and Ka-band)

• Responsible for the detailed design of LNA, PA, filter, and matching circuits

• Manufacturing Engineering support for engineering and flight RF boxes

• Investigation of RF boxes anomalies, non-conformances and proper closure of test defects along with their

root cause and corrective action reports to quality assurance

• Project Management responsibilities including customer interfacing on a regular basis

• Development of statement of work (SOW) for MMIC LNA design

• Development of prototypes, Qualification models and Flight production models.

• Conceived, implemented and improved various RF boxes such as power dividers, RF filters, LNAs, Phase

Look Loops and frequency synthesizer (S, C, X and Ku-bands)

Accomplishment:

• Delivered 6 Ka-Band LNA units to Spacecraft Level in 2014 for a commercial satellite customer

• Delivered the first GOES-R RF box (10 MHz Reference Divider unit) to Spacecraft level in 2013

• Supported the development and flight production of Phase Look Loops for the S-band and UHF receivers and

the UHF receiver unit for the GOES-R Spacecraft 2011-2013

• Responsible for a subcontracted RF filter in 2012 built by Aeroflex (80 MHz BW filter)

• Supported the development and flight production of power dividers, PLLs, RF amplifiers and UHF Receivers

Summer Internship June 2004 – September 2004

Employer: Lockheed Martin Space Systems

100 Campus Drive, Newtown, PA 18940

My responsibilities include:

Experienced RF engineer: LNA, PA, filter, matching circuits and PLLs. RF frequency range: L, C, X, Ku, and Ka.

LNA hybrids. Requirement and project schedule. RF testing, LabView, PNA, PNA-X.

• Engineering Test

• Mechanical Design Support for Spacecraft antennas

• Product Data Management Support ( PDM)

• Worked effectively in a team environment

• Mass property for various spacecraft mechanical assemblies

Sales Representative 1999 – 2001

Employer: Radio Shack

Green Acres Mall. 2034 Green Acres Mall Sunrise Highway Valley Stream, NY

My responsibilities include:

• Advised customers on the various products and addressed their concerns

• Worked effectively in a team environment

• Developed sales skills while assisting customers in a commission based salary

EDUCATION

Vaughn College of Aeronautics and Technology 2001-2005

Bachelor's degree of Science in Electronic Engineering Technology with Concentration in Avionics at former College

of Aeronautics, September 2001 to May 2005. Acquired in-depth understanding of Aircraft Electrical and Electronic

system. Fundamental course included: Avionics Standard Practices, Instrument landing systems, RADAR systems,

Aircraft Navigation and Flight control system, Aircraft electrical systems/avionics, Avionics Reliability and

Maintainability and Aircraft Communication Systems.

TECHNICAL SKILLS:

Knowledge and proficiency with RF, microwave and communications theory. Experience in RF circuit design of

power amplifiers, MMIC LNA and Downconveters, PLL, Frequency Synthesizers, Receivers, and modeling of circuits

using S parameters. Proficient with use of lab tools related to microwave/RF systems like: spectrum/network analyzers

(PNA-x, PNAs) and noise figure meter. Proficiency with circuit analysis tools such as AWR Microwave Office and

HFSS. Experience with LabView. Effective written and verbal communication skills and proficiency with MS Office

tools, DOORS, SAP, excellent interpersonal skills, and bilingual.

AWARDS:

• Engineering Spot Award for the GOES-R 10 MHz Reference Divider (2013)

• Patent: “Variable SSPA/Constant Efficiency and Linearity (# US. Pat. No. 8,237,504 Aug 2012)

• National Science Foundation (NSF) scholarship recipient 2002-2005

• Certificate in recognition of excellent academic standing for the fall 2002 semester at the College of

Aeronautics

VOLUNTEER EXPERIENCE:

Yardley borough recreational board, 2012 Present

• Supporting community activities throughout the calendar year.

Experienced RF engineer: LNA, PA, filter, matching circuits and PLLs. RF frequency range: L, C, X, Ku, and Ka.

LNA hybrids. Requirement and project schedule. RF testing, LabView, PNA, PNA-X.

Contact this candidate