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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.
None:
Spin-wave (SW) filters using single-crystal yttrium iron garnet (YIG) is an attractive technology for integration in frequency-adjustable or frequency-tunable communication systems1. However, existing SW devices do not have sufficient bandwidth for future 5G and 6G communication systems2,3, are too large or have strong spurious passbands, creating unintentional cross-channel interference. Here we report a SW ladder filter architecture requiring only a single external magnetic bias, which is enabled by modern micromachining fabrication methods capable of wafer-scale production. The filters developed in this work demonstrate loss as low as 2.54 dB, bandwidths up to 663 MHz, centre-frequency tuning over several octaves from 7.08 to 21.6 GHz and high linearity with an input-referred third-order intercept point of more than 11 dBm in the passband. The operation of the filter is also experimentally demonstrated in a frequency-tunable radio system.
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