Krister Andreasson

Title: Krister Andreasson: Inventor of Radio-Frequency Filter Technologies

Introduction

Krister Andreasson is an inventor associated with Stockholm, Sweden. His work includes radio-frequency components that combine antenna and filtering functions, as well as ceramic filters designed for dual-mode operation. He is credited with 3 patents.

Latest Patents

**Antenna-filter module.** This invention describes a module for transferring radio-frequency electromagnetic signals between the surrounding air and an electronic circuit. It combines a broadband antenna element with at least two adjacent integrated band-pass filters. The antenna couples electromagnetically with a resonator in each filter, enabling distinct pass bands for different antenna-filter combinations. Each filter also includes a coupling member for connection to an electronic circuit, such as an amplifier.

**Dual mode ceramic filter.** This filter has two cavities separated by a wall, with a TM dual-mode resonator positioned in each cavity. Each resonator has two modes and a central body with multiple outward-extending arms. Conductive input members are placed near the resonators to couple signals into them.

Career Highlights

Andreasson’s listed professional affiliations include Powerwave Technologies Sweden AB and Powerwave Technologies, Inc. His patent work reflects a focus on antenna systems and filter designs for radio-frequency applications.

Collaborations

His listed coworkers include Mattias Nystrom and Farshid Ghasemzadeh, reflecting professional connections in the telecommunications technology field.

Conclusion

Krister Andreasson’s inventions address practical challenges in radio-frequency signal handling through integrated antenna-filter modules and dual-mode ceramic filter designs.