We’re proud to share that PhoenixC4i has been featured in an official UK Government case study, published on GOV.UK by the Defence and Security Accelerator (DASA).
The case study highlights our work on DarkSky, a clip-on antenna solution designed to reduce radio frequency (RF) signature while improving the resilience of tactical communications in contested environments.
Being selected as a case study is a significant milestone for PhoenixC4i and reflects the operational relevance of the work we deliver in partnership with UK Defence.
Recognising real operational impact
DASA case studies are not marketing features — they are used to demonstrate technologies that have progressed beyond concept and shown credible military value.
In this case, the focus is on how DarkSky addresses a well-understood operational challenge:
how to maintain reliable communications without unnecessarily exposing forces to detection, interception, or electronic attack.
Traditional UHF tactical antennas radiate energy in many directions. While effective for coverage, this also increases RF exposure and the likelihood of detection by adversary electronic warfare systems.
DarkSky takes a different approach.
DarkSky: controlling RF, not changing how users operate
DarkSky is a clip-on antenna adapter that directs RF energy where it is needed, rather than radiating uniformly. By shaping emissions, it reduces unwanted RF signature while often improving link performance to intended recipients.
As highlighted in the GOV.UK case study, DarkSky offers:
- Substantial reduction in RF emissions in non-required directions
- Improved link quality and robustness, including HQ-to-HQ links
- Extended effective communication range, particularly to isolated nodes
- Reduced susceptibility to detection, interception, and jamming
- Low integration burden, with no changes to waveforms or network architecture
Importantly, the system is designed to retrofit to existing UHF radios and platforms, allowing it to be adopted without changing user behaviour or operational procedures.
From development to evaluation
DarkSky was developed with support from DASA and has since been procured by the British Army for evaluation, with units used in military exercises including WESSEX Storm and MARWORKS.
Its inclusion in a GOV.UK case study reflects not only technical performance, but also its practicality, deployability, and relevance to real operational scenarios.
Part of a wider approach to survivability and deception
DarkSky sits within PhoenixC4i’s broader portfolio of technologies focused on signature management, deception, and survivability across RF and infrared domains.
This work supports a common objective:
helping forces operate, communicate, and persist in environments where the electromagnetic spectrum is contested.
Looking ahead
We’re proud to see PhoenixC4i’s work recognised by the UK Government and DASA, and we see this case study as validation of our approach:
practical engineering, informed by operational reality, delivered at pace.
You can read the full government case study on GOV.UK here:
👉 https://www.gov.uk/government/case-studies/revolutionising-tactical-communications-security-in-defence
