OneFiltr: Smaller, Smarter, and DC Power-Free

OneFiltr breaks through traditional limitations with two core innovations: eliminating DC power consumption and reducing size and weight by more than 20x. Our advanced Yttrium Iron Garnet (YIG) manufacturing and transducer design also replace costly YIG spheres—cutting costs and boosting scalability without sacrificing RF performance.

Traditional YIG filters face size and power consumption challenge.

Yttrium Iron Garnet (YIG)-based tunable filters are known for their wide tuning range, high quality factor, and excellent linearity. But their reliance on bulky electromagnets and constant multi-watt power draw limits their practicality and scalability.

Innovation#1: Zero Static Power Magnetic Bias Circuit

Commercial YIG Tunable Filter

Electromagnets provide magnetic field, requiring constant power and large space.

OneFiltr

A small coil current pulse shifts AlNiCo’s magnetization, altering the magnetic field, which remains even without power.

Innovation#2: Microfabricated YIG cavity

Commercial YIG Tunable Filter

Each YIG sphere costs hundreds of dollars, requiring several spheres per filter.

Photo credit: yigsphere.com

OneFiltr

A 3-inch YIG wafer (<$20000) can yield over 2,000 filters using standard techniques, making it suitable for large-scale manufacturing.

Comparison with Commercial YIG Sphere Tunable Filters

Du, Xingyu; Yao, Shun; Ding, Yixiao; Lu, Dengyang; Wu, Shuxian; Chang, Chin-Yu; Al-len, Mark G.; Olsson III, Roy H. “A 4–18 GHz Tunable Magnetostatic Surface Wave Nonreciprocal Filter with Zero-Static-Power Consumption Optimized for High Out-of-Band Rejection.” In 2026 IEEE/MTT-S International Microwave Symposium (IMS 2026), Accepted.

Du, Xingyu; Ding, Yixiao; Yao, Shun; Ding, Yijie; Lu, Dengyang; Wu, Shuxian; Chang, Chin-Yu; Wang, Xuan; Allen, Mark G.; Olsson III, Roy H. “A Wideband Tunable, Non-reciprocal Bandpass Filter Using Magnetostatic Surface Waves with Zero Static Power Consumption.” Nature Communications, 2026.

Comparison with Varactors Tunable Filter

Du, Xingyu; Yao, Shun; Ding, Yixiao; Lu, Dengyang; Wu, Shuxian; Chang, Chin-Yu; Al-len, Mark G.; Olsson III, Roy H. “A 4–18 GHz Tunable Magnetostatic Surface Wave Nonreciprocal Filter with Zero-Static-Power Consumption Optimized for High Out-of-Band Rejection.” In 2026 IEEE/MTT-S International Microwave Symposium (IMS 2026), Accepted.

Du, Xingyu; Ding, Yixiao; Yao, Shun; Ding, Yijie; Lu, Dengyang; Wu, Shuxian; Chang, Chin-Yu; Wang, Xuan; Allen, Mark G.; Olsson III, Roy H. “A Wideband Tunable, Non-reciprocal Bandpass Filter Using Magnetostatic Surface Waves with Zero Static Power Consumption.” Nature Communications, 2026.

Wu, Shuxian; Yao, Shun; Du, Xingyu; Chang, Chin-Yu; Olsson III, Roy H. “Spatially Tailored Spin Wave Excitation for Spurious-Free, Low-Loss Magnetostatic Wave Filters with Ultra-Wide Frequency Tunability.” Microsystems & Nanoengineering, Accepted.

Comparison with High-Pass and Low-Pass Filters

Du, Xingyu; Yao, Shun; Ding, Yixiao; Lu, Dengyang; Wu, Shuxian; Chang, Chin-Yu; Al-len, Mark G.; Olsson III, Roy H. “A 4–18 GHz Tunable Magnetostatic Surface Wave Nonreciprocal Filter with Zero-Static-Power Consumption Optimized for High Out-of-Band Rejection.” In 2026 IEEE/MTT-S International Microwave Symposium (IMS 2026), Accepted.

Du, Xingyu; Ding, Yixiao; Yao, Shun; Ding, Yijie; Lu, Dengyang; Wu, Shuxian; Chang, Chin-Yu; Wang, Xuan; Allen, Mark G.; Olsson III, Roy H. “A Wideband Tunable, Non-reciprocal Bandpass Filter Using Magnetostatic Surface Waves with Zero Static Power Consumption.” Nature Communications, 2026.

6-32 GHz Tunable Filter

Yao, Shun; Wu, Shuxian; Ding, Yixiao; Lu, Dengyang; Du, Xingyu; Wang, Tao; Chang, Chin-Yu; Allen, Mark G.; Olsson III, Roy H. “Low-Loss, Flat-Passband, 6–31 GHz Tun-able Magnetostatic Surface Wave Filter with Zero Static Power Consumption.” In 2026 IEEE/MTT-S International Microwave Symposium (IMS 2026), Accepted.

3-32 GHz Tunable Notch Filter

More than 20 dB rejection between 3-32 GHz with less than 2 dB insertion loss

Du, Xingyu; Yao, Shun; Ding, Yixiao; Yu, Zhehao; Geers, Alexander J.; Aflatouni, Firooz; Allen, Mark G.; Olsson, Roy H. “Magnetostatic Wave Notch Filters Frequency Tuned via a Zero DC Power Magnetic Bias Circuit.” In 2024 IEEE International Microwave Filter Workshop (IMFW), pp. 176–179, 2024.