Precision and Performance for High-Performance RF Systems under 100 MHz: The New QP Series from Johanson Technology

When it comes to developing powerful RF systems (Radio Frequency), particularly in the sub-100 MHz range, components are required that do not compromise on signal quality, efficiency, or reliability. Johanson Technology introduces the new High-Q Porcelain P90 Multilayer Ceramic Capacitor Series (QP Series), providing a solution that fully meets these requirements.

Why are these capacitors critical for your designs?

The QP Series has been specifically designed for demanding high-frequency applications, offering a range of technical advantages:

• Low ESR and high Q-factor: Minimises power loss and enhances amplifier efficiency.

• High self-resonance frequency (SRF): Ensures clean and stable performance across key frequency ranges.

• High stability P90 dielectric: Maintains capacitance over extreme temperature fluctuations.

• Non-magnetic construction: Prevents interference in sensitive RF and MRI circuits.

• Controlled SRF/PRF: Optimises fine-tuning in matching and filter networks.

• Enhanced heat dissipation: Lower specific resistivity in the thermal plane allows higher power output.

Moreover, these capacitors are manufactured in North America, offering shorter lead times, ITAR compliance, and the possibility for application-specific screening customisation.

Technical Highlights at a Glance

• Case sizes: 1111 already available; 2525, 3838, and 7676 orderable from 1st October 2025

• Dielectric: High-fired porcelain for high power demands in the low-frequency range

• Temperature range: -55°C to +150°C

• Terminations: 100% tin (RoHS compliant) or SnPb

Typical Applications

The QP Series is ideally suited for critical RF designs in areas such as:

• MRI coil tuning

• High inductive applications

• Broadband wireless systems

• RF matching and filter networks

• High-power radio and radar

• Decoupling, bypass & DC block

• RF & microwave test equipment

• High voltage applications in RF designs

• Semiconductor manufacturing equipment

With their high durability, low loss, and construction focused on longevity and precision, the Porcelain P90 MLCCs of the QP Series set new standards for high-performance RF designs. For engineers working in demanding RF environments, they offer a reliable and powerful foundation.

Want to learn more or request samples? Contact our sales team for further information or technical support.