E-mail: nigel.kinbrum@ntlworld.nospamplease.com
PROFILE: An innovative RF DESIGN ENGINEER with extensive experience in the
design and development of communications equipment. Familiar with a wide range of test
and measurement equipment and PC-based CAD tools. Enjoys working on his own initiative
and in collaboration with his colleagues. Good design and problem solving skills.
Dedicated to maintaining high quality standards.
CAREER EXPERIENCE:
2001 - 2006 ASSISTANT CHIEF ENGINEER Thales Land & Joint Systems, Reading
- Designed a WLAN frequency translation and boosting system for increased range.
Successfully transferred data over peer-to-peer network over 1 mile range.
- Designed a Frequency Reference module for a High-Frequency Software-Defined Radio system.
The unit could be used open-loop or phase-locked to a variety of external references.
It also incorporated built-in test circuitry.
- Designed a Pre/Post Selector for the above radio system. This is a frequency-agile preselector
unit for use in front of the receiver and after the exciter to improve Rx signal-handling and Tx
wideband noise.
- Designed Rx circuitry for a covert, 60 to 470MHz, multi-mode transceiver.
- Designed Rx and Tx circuits for a hand-held, 30 to 88MHz frequency-hopping
transceiver. Main features included small size, digitally controlled frequency-hopping
RF Head, digitally controlled Rx and Tx functions, digitally controlled output power
level with on-board storage of all parameters pertinent to the unit. Digital
control of the RF Head allowed automatic alignment to be performed, which
was approximately twenty times faster than the manual alignment of the
man-pack RF Heads previously designed. Gained some experience in the use
of National Instruments LabVIEWTM and MicroSim PSpiceTM.
- Designed a low-noise VCO with 25mW o/p, ~180dBc/Hz C/N
@10% offset for the synthesiser of the above radio. Main features included small
size, high efficiency and MHz/volt proportional to carrier frequency.
- Designed Impedance-measuring and associated
circuitry for a 1.5 to 30MHz transceiver, vehicle appliqué unit
and antenna tuning units (ATU's). Developed a tuning algorithm for the ATU using
the impedance-measuring circuit, which required much fewer tuning operations than previous
designs. Gained some experience in the use of MathSoft MathcadTM. Also assisted in the
testing, fault-finding and design improvement of the RF module for the transceiver.
- Re-designed the RF Head for the VHF man-pack frequency-hopping transceiver with the following improvements: -
Constant RF bandwidth across each band. Simplified coil construction with
more rugged cores. Increased frequency coverage to 108MHz. Improved the Rx
VCO to achieve >160dBc/Hz C/N @1MHz offset.
- Designed a breadboard frequency-hopping Antenna
Matching Unit for different length whip antennas for a VHF communications project.
- Designed and measured Ultra-wideband SHF antennas.
- Designed a 30 to 88MHz dual-port antenna matching and combining unit for
operating two 50W frequency-hopping vehicle stations simultaneously into
one whip antenna. Also designed a 30 to 108MHz version and single-port
antenna matching units.
- Designed a 225 to 400MHz, 12V, 20W PEP PA for a
UHF man-pack frequency-hopping transceiver using MOSFETs.
- Designed 220 to 400MHz, 3W driver and 30W PA stages for a communications
system. Main features included: - First use of Eesof TouchstoneTM and
LinecalcTM CAD for analysis of micro-strip matching for the driver
stage and strip-line coupler for PA output monitoring.
- Designed Rx and Tx circuits for a hand-held UHF transceiver ~400MHz, 10V, 2W.
- Designed a 225 to 400MHz, 28V, 40W PEP PA for a UHF
airborne frequency-hopping transceiver. Same features as the man-pack PA plus: -
current-controlled AGC for AM and constant-current control for FM,
Tx/Rx switching, Rx protection, over-temperature protection.
- Re-designed the exciter module for a UHF man-pack frequency-hopping
transceiver to reduce modulation distortion and spurious products.
- Designed a 225 to 400MHz, 12V, 4W PEP PA with amplitude
modulation, smooth power ramping, VSWR protection, power level
switching, power supply, power measurement and other functions for a
UHF man-pack frequency-hopping transceiver.
- Jointly designed a 30 to 88MHz RF Head with >+30dBm
signal-handling @10% offset for a VHF man-pack frequency-hopping transceiver.
- Designed a 1W, 30 to 88MHz, push-pull LDMOSFET VCO with
>190dBc/Hz C/N @10% offset for a VHF man-pack frequency-hopping transceiver.
Main features included a novel limiting circuit and high efficiency.
Various courses including: - Six-Sigma/TQM, Technical Writing for Engineers, Microsoft Excel(TM), Inter-personal and communication skills.
QUALIFICATIONS:
BSc (Hons) 2.2 in Electrical and Electronic Engineering at University College, London.
4 A-Levels: Physics, Chemistry, Biology, Mathematics.
8 O-Levels.
INTERESTS:
Reading, Science Fiction, Diet & Nutrition, Karaoke.
PERSONAL DETAILS:
Date of Birth: 6th March.
Nationality: British.
Location: North-East Hampshire.
Marital Status: Single.
Health: O.K.
Driving Licence: Full, current, 3 points.
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