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Spin-wave band-pass filters for 6G communication
Connor Devitt1, Sudhanshu Tiwari2, Bill Zivasatienraj3
1OxideMEMS Lab, Elmore Family School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, USA. devitt@purdue.edu.
Nature
|February 4, 2026
Summary
This study introduces a novel spin-wave (SW) ladder filter using yttrium iron garnet (YIG) for advanced communication systems. The new design offers wider bandwidth and frequency tunability, overcoming limitations of current SW devices.
Area of Science:
- Physics
- Electrical Engineering
- Materials Science
Background:
- Single-crystal yttrium iron garnet (YIG) spin-wave (SW) devices are promising for tunable communication systems.
- Existing SW devices lack the bandwidth for 5G/6G, are bulky, and suffer from spurious passbands causing interference.
Purpose of the Study:
- To develop a novel SW ladder filter architecture for improved communication systems.
- To overcome bandwidth, size, and interference limitations of current SW filters.
Main Methods:
- A new SW ladder filter architecture was designed and fabricated using modern micromachining techniques for wafer-scale production.
- The filter requires only a single external magnetic bias for operation.
Main Results:
- The developed filters exhibit low insertion loss (2.54 dB) and wide bandwidths (up to 663 MHz).
- Achieved center-frequency tuning over several octaves (7.08–21.6 GHz) with high linearity (>11 dBm IP3).
- Experimental demonstration in a frequency-tunable radio system confirmed functionality.
Conclusions:
- The novel SW ladder filter architecture significantly enhances performance for next-generation communication systems.
- This technology offers a viable solution for frequency-tunable filters with improved bandwidth and linearity.
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