An RF Engineer with a broad range of experience and 30 years in the telecommunication Industry. Experienced in all phases of product development from conceptual design to systems integration and test. A flexible team player; used to working in multi-national, cross-cultural and cross-functional teams.



Now based in Southampton, I have worked for some of the world's leading telecommunications companies, including AT&T Bell Labs/Lucent in New Jersey, 3COM, Plantronics and within the Innovation team at Plantronics, known as PLT Labs.  

I have designed the antennae and/or the RF circuitry for a variety of Bluetooth, BLE, DECT and Wi-Fi based IOT products and wearable devices including: Headsets, Dongles, Handsets, Base Stations, iBeacons and several other body worn products.  I have significant experience in the use of antenna design and simulation tools such as CST Microwave Studio, EM.Cube Tempo and Sim4life. I have several patents/applications relating to design and manufacture of wireless products and systems.

I set up Radtenna with the aim of providing small and medium-sized companies with the RF and Antenna design resource required to bring their ideas to fruition, without the expense of hiring full-time staff. I am passionate about design and technology and I'm looking forward to being part of the Internet of Things revolution. 

Some recent Radtenna projects are outlined on the Recent Projects   page.

Key skills include:
  • Design of RF circuits to 6 GHz, (CT2, DECT, WCPE, Bluetooth, Bluetooth LE,  802.11a/b/g Wireless LAN and UWB )
  • Design of single and multi-band Antennas to 6 GHz
  • Low power wireless, analogue and digital design with considerable experience in battery powered consumer electronics.
  • Experienced with CST Microwave Studio Antenna simulation software
  • Leadership of multidisciplinary teams and external contractors. Balancing internal and external resources

"I've worked with Andy for well over 10 years. He is an innovative, technically competent RF (and hardware) engineer working from simulation right through to shipping in low power, mutli-antenna/frequency wireless products. Hand-picked to work in the Innovation team. Excellent customer, team and communications skills, too, coupled with exemplary work ethic. A rare combination of skills!" Simon Goddard  - Director Engineering, EMEA at Plantronics Ltd.

"Andy is a bright, competent and highly motivated engineer with 30 years experience in the telecommunication sector. He has considerable expertise Bluetooth and RF design with an outstanding track record for driving innovation into complex miniature audio devices. He's a great team player and communicator with a good balance of professionalism and focus on results."  Dave Marshal - .EMEA Sales Director - Mid-Market at Jabra

"I have worked with Andy on a variety of development projects over the years and have nothing but praise to offer for his competencies. He is one of that rare breed of engineers that combines technical excellence with a genuine appreciation of market need and the ability to communicate complex technical material to non-technical audiences. Talented, experienced, pragmatic and commercially savvy I unhesitatingly recommend Andy's services to anyone seeking world class radio technology design consultancy"  Nigel Holland - Product Manager at Sennheiser UK Ltd,

Andy Knowles
Andy Knowles

Product Gallery

  1. Bluetooth dongle printed antenna
    printed meander line antenna
    three dongle meander line antenna designs
  2. Headset edge plated antenna
    edge plated antenna for a bluetoot headset
    bluetooth headset antenna design with gold plating and holes for reduced dielectric
  3. headset metal formed antenna
    metal formed anetnna for a bluetooth headset
    A tin metal antenna
  4. UWB radio sensor PCB Decawave
    decawave based UWB radio tag
    A UWB radio tag design for in building location
  5. iBeacon Antenna
    iBeacon design
    Bluetooth low energy BLE beacon for location and IOT
  6. Planar Inverted F Antenna
    Antenna Design
    Inverted F antenna design
Printed Antenna
Edge Plated Antenna
Metal Formed Antenna
UWB Radio and Sensor Circuitry
​Planar Inverted F Antenna