Sarantel (officially Sarantel Group PLC) (AIM: SLG) is a Wellingborough, UK-based manufacturer of miniature low-proximity antennas used in cell phones, PDAs, GPS, and other communication devices. The company has offices in England and the US. Sarantel is listed on the London Stock Exchange in the Alternative Investment Market (SLG.L).

Sarantel is a spin-off of Symmetricom founded in 2000 by Dr. Leisten. Leisten was spearheading the development of a new type of miniature antenna – now called PowerHelix - since the 1990s at Navstar Systems Ltd. Navstar was acquired by Symmetricom in 1993. During 1999 and 2000 Symmetricom enacted a strategy to focus on their core business of designing and manufacturing timing and network synchronization technology. They offered Dr. Leisten an opportunity to do a management buy out of the miniature antenna technology they acquired from Navstar.

Leisten took advantage of the offer and founded Sarantel and the company started trading on 29 September 2000 with first-round funding of approximately $10 million from 3i and Foresight Venture Partners. Further private funding rounds involved 3i, MTI, Foresight Venture Partners, Trivest, E Technologies and Hotbed In 2004 the European Tech Tour identified Sarantel as one of the Top 25 high growth technology companies in the UK. In March 2005 Sarantel floated on the London Stock Exchange's AIM market and in August 2005 Sarantel shipped its one-millionth antenna.