Hi-Power Combiner with Passive Temp Compensation

We were approached by a leading P25 OEM who wanted a high-performance combiner solution that would remain maintenance-free for over 25 years, minimising their ongoing OPEX. Because of Filtronic’s extensive expertise in filter design, we were able to use advanced custom ceramics to ensure the thermal targets were reached, resulting in high reliability with no recalls despite having over 16k on the market.

The solution

• Industry standard active temp comp not reliable enough.
• R&D team developed passive temp comp using progressive series of advanced custom ceramics.
• Linearity over temperature exceeded customer requirements.

The result

• Client overrode standard protocol and selected us as single source due to performance & reliability advantage.
• Established reliability with no recalls.
• Over 16,000 combiners shipped since 2004
• Built in USA.

The challenge

• The mean time between failure needed to be at least 900,000 hours for the first 10 years of operation.
• Peak instantaneous power capability 9,000W.
• Requirement to be stable and maintenance free for 25+ years.