Thursday, January 8, 2026

Rosenberger acquires majority in CellMax

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Rosenberger Hochfrequenztechnik GmbH & Co. KG, today announced that it has acquired a majority stake in CellMax Technologies, the Stockholm based innovator of high efficiency base station antennas.

The two parties are confident that Rosenberger’s global reach, industrial capabilities and focus on innovation, high performance and quality will have a very positive impact on CellMax’ customers and partners. While a joint marketing strategy will be worked out over time the initial focus is on achieving production and R&D synergies as well as scale efficiencies. CellMax Technologies, a specialist provider of advanced ultra-high efficiency base station antennas, will keep its head office in the Swedish ICT hub of Kista.

“We are delighted to make this strategic investment,” said Rosenberger CEO Hans Rosenberger. “We believe that CellMax and its customers will benefit greatly from our global industrial capabilities.”

Torbjörn Kämpe, who will remain CEO of CellMax said: “We are very pleased to partner with Rosenberger. We are convinced that this structure brings together relevant innovation, technology, design and manufacturing capabilities.”

“The excellent performance and quality we provide significantly increase our customers’ revenue potential, lowers cost of network and ultimately lowers cost of spectrum. This is key for operators that are increasingly differentiating their offers on user experience,” concludes Mr. Kämpe.

For additional information please contact:

Torbjörn Kämpe

CEO, CellMax Technologies AB

Phone: +46 8 755 12 80

Mobile: +46 70 152 00 00

Email: torbjorn.kampe@cellmax.com

About Rosenberger:

Rosenberger is an innovative global leader in RF technology with an international presence. The Rosenberger name stands for both quality and cutting edge technology in the field of RF connectors, low frequency & high frequency cable assemblies, RF test and measurement devices, automotive products, fiber optic products and custom copper assemblies. Rosenberger, headquartered in Germany , maintains sales and manufacturing facilities around the globe. As a leader in the industry, we provide a wide range of standardized and customized connectivity solutions to a variety of customers across multiple industry segments.

Our products are used in wireless technology, telecom, test & measurement, automotive, medical, military, industrial and data systems. Customers rely on the precision and quality of Rosenberger products around the globe.

About CellMax Technologies:

CellMax Technologies develops and markets ultra-high efficiency base station antennas for mobile networks. CellMax’s revolutionary antenna technology reduces the power losses within the antenna to close to zero, resulting in higher signal strength and a dramatic increase in geographical area coverage, improved indoor penetration, increased net traffic, improved data throughput and reduced production costs per call.

CellMax’s unique and patented antenna design is based on quasi waveguide technology with air as dielectric, which virtually eliminates power losses; Traditional antennas lose 20-60 percent power through the cables. With antennas from CellMax operators can increase data throughput and capacity in 3G/4G networks by up to 40% thanks to higher signal strength and reduced interference. CellMax’s customers include several of the world’s largest mobile operators and manufacturers of telecom equipment, and our products have been deployed all over the world.

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