Mark Yeates

Solely responsible for development and testing of all RF products.

Design of test protocols to validate low phase noise oscillators and signal sources from 100MHz to 6GHz.

Management of obsolescence issues, implementing strategies for product lifecycle continuity.

Responsible for product test, alignment and debug to component level on RF signal processing products including Log-Amps, Discriminators, and Limiters working from 100MHz to 1GHz. Radar transponders at S and X band. DRO and crystal oscillators 100MHz-12GHz.

Providing design and test support in the RF Team.

Design compliance testing on 5.8GHz point-to-point links.

Design, layout and test for the PA and associated switching circuitry.

Responsible for debug and repair to component level of all product. RF card test definition, specification writing and test verification.

Constructed and coded a GPIB controlled Antenna Test Range measurement system.

In a team responsible for design variants and product support for the 3.5GHz FRA base station and residential system. Responsible for frequency variants and in-manufacture yield issues, component obsolescence re-design issues.

Review of Design Verification Testing, new project assessment, costing and presentation to customers.

Involved in the design, size and cost reduction of GSM Base-station transceivers with particular responsibility for integrated RF testing features and general design trouble-shooting from baseband to RF. Other duties included design of ATE for boards, writing of production test documentation and formal design proving exercises.

In the 3.5GHz Fixed Radio Access system team. RF design on residential unit for volume production, responsible for automatic power control system and RF power amplifiers.

Design of RF line-up in active antennas for GSM900, DCS1800 and PCS1900 systems.

Design, prototype and cost-reduce for volume manufacture: 1.8 and 1.9GHz amplifiers, attenuators, detectors and microstrip circuitry, discrete and hybrid power amplifiers.

Definition of ATE for manufacture.

Leader of the team of 5 RF engineers and providing expertise to all RF projects.

Design optimisation of 135 - 175MHz and 400MHz synthesised transmitters for sonobuoy products.

Seconded for 6 months to the MUSL production site at Newport to address problems of RF product defects and poor yield in manufacture.

Design and prototype of a broadband active antenna array for continuous coverage 10kHz to 3GHz. Beam pattern and propagation analysis. Antenna characterisation, field trials, ground plane and anechoic measurements from HF to Microwave.

Responsible for the provision of an in-house EMC screened test facility.

Responsible for the design, code and test of software on projects, ranging from embedded micro-controllers for synthesiser control to IEEE based ATE.

Design of a range of miniature signal processing components: 0.1-1.5GHz. Pin switches and a 5-step binary attenuator.

Contributed to the design of 120MHz IF strip with SAW filters, 10GHz pin limiter, 6-8GHz low noise amplifier, 10 GHz limiting amplifier and SRD multipliers.

Assembly and test on a wide range of RF products: Microwave amp's, limiters, circulators, isolators. VHF-UHF amplifiers, mixers, IF hybrids and switches.