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Defence

Solving complex technology challenges for government, defence primes & armed forces

Award winning PLX-T60 Radar

Delivering UK sovereign defence solutions from research to deployable systems

With 35+ years experience in RF, sensing, AI, machine learning and alt-PNT, Plextek works closely with UK government agencies and NATO defence contractors to develop solutions in areas spanning radar, GPS-denied navigation, communications in contested environments, autonomous systems, decision support and EW payloads for uncrewed air systems. 

Discover our solutions in:

Plextek is built on innovative ideas and advanced technology solutions

UK Sovereign SME
Founded in 1989
Based south of Cambridge in a purpose-built facility
100 Staff, 80+ Engineers
Partnering with: British armed forces, DSTL, UKDI & Defence Primes

Trust and Confidence

an engineer developing technology holds a mmWave Radar circuit board

Our heritage as a customer friend and technology partner enables government agencies, defence suppliers and military stakeholders to have trust and confidence in Plextek to deliver leading-edge solutions.

RF and communications specialists at Plextek ensure you receive an impartial view of any technology assessment or development programme placed with them. Plextek understands the customer need for leveraging capabilities in R&D, exploiting existing technology enabling platforms and delivering deployable system solutions to ensure product differentiation and leading disruptive capability.


Delivering expertise through each Technology Readiness Level (TRL)


Applied Research

In the defence sector, Plextek excels at low TRL applied research, to underpin future innovation.

We combine technical expertise with a vision for future-ready defence, offering actionable research that informs the development of cutting-edge capabilities.

  • Expert Analysis

    Our team provides expert assessments of new technologies, ensuring they’re viable for defence applications.

  • Engineered Solutions

    We deliver bespoke solutions, drawing on deep technical knowledge and cross-sector engineering experience.

  • Strategic Partnerships

    Collaborating closely with defence stakeholders, we shape our research to meet specific strategic needs.

    As a member of the East of England Regional Defence and Security Cluster, Plextek actively contributes to strengthening the region’s defence innovation ecosystem. 


Technology Demonstrators

Technology implementation

For mid TRL technology implementation, we focus on creating platforms and demonstrators that bridge the gap between theoretical research and real-world application.

We act as a catalyst in technology demonstration: enabling our partners to experiment with and refine their innovations. 

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Prototyping and Validation

We develop robust prototypes integrating essential functionalities of new technologies, geared for thorough testing and validation. This precise method guarantees superior reliability and performance, ensuring readiness for widescale roll-out. 

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Scalable Solutions

Our approach ensures that every technology demonstrator is scalable, capable of transitioning seamlessly from experimental setups to full-scale deployment. 

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Integration Expertise

With a deep understanding of complex system integrations, Plextek ensures that new technologies can be seamlessly embedded within existing frameworks, enhancing rather than disrupting established operations. 

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Custom-Built Platforms

Every demonstrator is tailored to the specific requirements and strategic objectives of our clients. 

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Design & Supply Partner

As your high TRL Design & Supply Partner, we provide comprehensive outsourcing for engineering, design, and supply:

Complete Engineering Services:

From concept to delivery, we offer end-to-end solutions tailored to your product’s lifecycle. 


Design Authority:

As your design authority, we ensure your product meets all technical, quality, and regulatory standards. 


Efficient Supply Chain:

Our agile supply chain strategy guarantees the swift and effective market entry of your product. 


Collaborative Partnerships:

We engage in deep, collaborative B2B relationships, aligning our innovative approach with your product ambitions.


    DPNS - GPS-Denied Navigation

    GPS-Denied Navigation

    Plextek has developed a suite of alternative navigation (Alt-Nav) technologies that provide reliable navigation solutions when GNSS is degraded or denied

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    Radar Technologies

    Discover how these innovations in Ubiquitous Radar, Terrain Reference Navigation (TRN), and our configurable mmWave platform can enhance operational safety, efficiency, and security in defence applications

    Electromagnetic Warfare

    Electromagnetic Warfare

    Providing RF expertise and electromagnetic warfare solutions for defence applications in contested environments

    Addressing the Escalation in GNSS Spoofing with Data Fusion

    Addressing GNSS Spoofing

    Plextek’s data fusion technology helps maritime vessels maintain navigation accuracy during increasing GNSS spoofing attacks

    Contact a member of our team

    Get in touch

    At Plextek, we lead with advanced engineering solutions tailored to the defence sector’s unique needs.

    Contact us to confidentially discuss how we can tackle your specific challenges and enhance your strategic capabilities.