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arxiv: 2606.29995 · v1 · pith:4U7TUS4Gnew · submitted 2026-06-29 · ⚛️ physics.app-ph · eess.SP

Design and Realization of Broadband Magnonic Spectrometers With Local Electrical Outputs

Johannes Greil , Maximilian Hofschen , Felix Naunheimer , \'Ad\'am Papp , Gy\"orgy Csaba , Markus Becherer This is my paper

Pith reviewed 2026-06-30 04:06 UTC · model grok-4.3

classification ⚛️ physics.app-ph eess.SP
keywords spin wavesmagnonicsRowland circlespectrometerYIGelectrical readoutRF signal processing
0
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The pith

A Rowland circle spectrometer for spin waves is realized with electrical input and local electrical output transducers on YIG films.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper demonstrates a magnonic spectrometer that accepts RF electrical signals at the input and provides local electrical outputs for detected spin waves at different frequencies. Fabrication relies on sputter deposition and wet-chemical etching to form concave grating structures with micrometer-scale features in Yttrium-Iron-Garnet. Combined electrical and magneto-optical measurements confirm that spin-wave wavefront deflections match analytical predictions across input frequencies, while dual-tone excitation verifies handling of simultaneous waves. The work further proposes extending the approach to arrays of such spectrometers with tunable operating points for adjustable bandwidth and resolution.

Core claim

The device functionality is confirmed by combined electrical and magneto-optical measurements, which show that the deflection of SW wavefronts at different input frequencies closely follows the analytically predicted behavior. The linear excitation of SWs via two input tones further confirms the spectrometer operation for simultaneously propagating waves. Beyond the single-device demonstration, a concept for scalable architectures comprising multiple Rowland circles with tunable operating points is proposed.

What carries the argument

The Rowland circle geometry with concave grating structures in a YIG film that focuses spin waves of different frequencies onto distinct local electrical output transducers.

If this is right

  • The spectrometer enables compact RF signal processing with electrical readout.
  • Multiple Rowland circles allow control over bandwidth and spectral resolution.
  • The architecture supports broadband parallel electrical readout for simultaneous waves.
  • It targets applications in spectral occupancy detection for wireless systems.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The fabrication method could extend to other magnonic devices requiring curved structures.
  • Tunable circles might enable reconfigurable spectrum analyzers in integrated RF circuits.
  • Direct comparison of electrical output signals to optical images could quantify conversion efficiency.

Load-bearing premise

The sputter deposition and wet-chemical etching process reliably produces the micrometer-scale concave grating features needed for the Rowland circle geometry to function as predicted.

What would settle it

Observation that spin-wave wavefront deflection angles at varying input frequencies deviate from the analytically predicted values would falsify the central claim.

Figures

Figures reproduced from arXiv: 2606.29995 by \'Ad\'am Papp, Felix Naunheimer, Gy\"orgy Csaba, Johannes Greil, Markus Becherer, Maximilian Hofschen.

Figure 1
Figure 1. Figure 1: Realization of a magnonic Rowland circle with local electrical read-out. a) Through-light microscope image of a fabricated Rowland circle spectrometer with radius R = 75 µm and grating period d = 16 µm. A concave YIG grating is realized by wet-chemical etching, and SWs are excited by a curvilinear transducer. SW interference leads to spatial separation of different diffraction orders along the Rowland circ… view at source ↗
Figure 2
Figure 2. Figure 2: Sample Fabrication using sputtering and wet-chemical etching. a) RF magnetron sputtering of an amorphous YIG film (100 nm to 500 nm) in an Ar plasma. b) Optical lithography using a maskless aligner to define an etching mask. c) Wet-chemical etching of the amorphous YIG film using a standard solution of phosphoric, nitric, and acetic acid at 45 ◦C with an etch rate of 0.87 nm/s. d) Optical lithography using… view at source ↗
Figure 3
Figure 3. Figure 3: Electrical and magneto-optical characterization of a magnonic Rowland circle a) Calibrated differential transmission S-parameters |∆S21| for a concave grating with R = 75 µm and d = 16 µm at a constant bias field µ0Hx ≈ 246 mT. The measured detection peaks for the symmetrical output transducers T1/T2 and T4/T5 are located in the analytically calculated detection regions D1,2. The zero-order focusing point … view at source ↗
Figure 4
Figure 4. Figure 4: Two-tone excitation of a Rowland circle spectrometer. The measurement was conducted at a constant DC bias magnetic field of about 220 mT in out-of-plane direction. Simultaneous excitation at f1 = 2.10 GHz and f2 = 2.15 GHz results in SW with λ1 = 3.5 µm and λ2 = 2.3 µm and corresponding deflection angles α1 = 26◦ and α2 = 17◦. The analytically calculated deflection angles are indicated by the dashed lines.… view at source ↗
Figure 5
Figure 5. Figure 5: Crosstalk evaluation of different Rowland circle variants. a) The shielded (s) variant for the input/output transducers of the Rowland spectrometer with extended GND planes. b) The non-shielded (ns) variant with GND lines only. Both pictures show fabricated Rowland circles with R = 75 µm. c) Calibrated transmission S-parameter measurements for two sizes of spectrometers (R1 = 75 µm and R2 = 90 µm) with and… view at source ↗
Figure 6
Figure 6. Figure 6: Concept for a broadband and high-resolution magnonic spectrometer. a) Conceptual visualization of a parallelized SW-based spectrometer with four Rowland circles fabricated on a magnonic chip that is embedded in an RF substrate. The operational point of each spectrometer can be set, e.g., by focused-ion-beam irradiation at different dose levels. The spectrometers share a common input transducer, while multi… view at source ↗
Figure 7
Figure 7. Figure 7: f)-k), the power-dependent analysis of the differential S-parameters |∆S21| is shown for input powers from −15 dBm to 10 dBm. For input powers above about −10 dBm, the SWs start getting excited in the non-linear regime and as a result the amplitude of the transmitted SW signals drops [41]. This marks the region of the device’s 1dB compression point, P1dB. 2 2.5 3 frequency in GHz -90 -80 -70 -60 -50 |S21| … view at source ↗
Figure 8
Figure 8. Figure 8: Solid lines: Electromagnetic crosstalk between the output transducers of a Rowland circle with [PITH_FULL_IMAGE:figures/full_fig_p010_8.png] view at source ↗
Figure 9
Figure 9. Figure 9: a) Calibrated differential S-parameter measurements [PITH_FULL_IMAGE:figures/full_fig_p010_9.png] view at source ↗
Figure 10
Figure 10. Figure 10: a)-e) |S21| for the five output transducers T1–T5 at µ0Href ≈ 300 mT and µ0Hx ≈ 327 mT. The flat electromagnetic crosstalk enables clearer SW signal extraction. f)-k) Differential S-parameters ∆S21 for input powers from −15 dBm to 10 dBm. Above about −10 dB, the SWs are excited non-linearly, which marks the region of the 1dB compression point P1dB. APPENDIX C ADDITIONAL DATA FOR CROSSTALK CHARACTERIZATION… view at source ↗
Figure 11
Figure 11. Figure 11: Characterization of the electromagnetic crosstalk between the output transducers for shielded variants with extended GND planes in a) and c), which [PITH_FULL_IMAGE:figures/full_fig_p011_11.png] view at source ↗
Figure 12
Figure 12. Figure 12: Comparison between the crosstalk of a) shielded and b) unshielded Rowland circles with [PITH_FULL_IMAGE:figures/full_fig_p012_12.png] view at source ↗
Figure 13
Figure 13. Figure 13: a) Schematic of an RF power detector consisting of a matching resistor [PITH_FULL_IMAGE:figures/full_fig_p013_13.png] view at source ↗
Figure 14
Figure 14. Figure 14: Exemplary calculation for possible working regimes of SW-based spectrometers. a) Analytically calculated dispersion relation for [PITH_FULL_IMAGE:figures/full_fig_p014_14.png] view at source ↗
Figure 15
Figure 15. Figure 15: TrMOKE measurements of the Rowland circle (blue) with [PITH_FULL_IMAGE:figures/full_fig_p015_15.png] view at source ↗
read the original abstract

Microscopic radio-frequency (RF) devices based on propagating spin waves (SWs) are promising for compact, energy-efficient RF signal processing, but their implementation is impeded by fabrication complexity and the lack of efficient electrical readout. In this work, we demonstrate a SW-based Rowland circle spectrometer with electrical input and local electrical output transducers. The device is realized using a scalable fabrication process based on sputter deposition and wet-chemical etching of Yttrium-Iron-Garnet (YIG), forming concave grating structures with micrometer-scale features. The device functionality is confirmed by combined electrical and magneto-optical measurements, which show that the deflection of SW wavefronts at different input frequencies closely follows the analytically predicted behavior. The linear excitation of SWs via two input tones further confirms the spectrometer operation for simultaneously propagating waves. Beyond the single-device demonstration, we propose a concept for scalable architectures comprising multiple Rowland circles with tunable operating points. When combined with broadband parallel electrical readout, this approach enables control over bandwidth and spectral resolution, which are relevant to spectral occupancy detection in wireless communication systems.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The manuscript claims to demonstrate a spin-wave (SW) based Rowland-circle spectrometer fabricated in YIG via sputter deposition and wet-chemical etching, featuring electrical input and local electrical output transducers. Functionality is asserted to be confirmed by combined electrical and magneto-optical measurements showing that SW wavefront deflections at varying input frequencies match analytical predictions, with additional verification via linear excitation using two simultaneous input tones. The work also proposes scalable multi-Rowland-circle architectures with tunable bandwidth and resolution for spectral occupancy detection.

Significance. If the quantitative match between measured wavefront deflections and analytical predictions holds, the result would be significant for applied magnonics: it addresses fabrication complexity and readout limitations in propagating-SW RF devices and provides a concrete path toward compact, energy-efficient spectral processors. The emphasis on scalable YIG processing and parallel electrical readout architectures strengthens the practical relevance.

major comments (2)
  1. [Abstract / Results] Abstract and results: the central claim that 'measurements confirm analytical predictions' and that 'deflection of SW wavefronts ... closely follows the analytically predicted behavior' lacks any reported quantitative metrics (e.g., angular deviation, RMS error, or statistical comparison) or error bars. Without these, the strength of the experimental confirmation cannot be evaluated and is load-bearing for the spectrometer demonstration.
  2. [Fabrication / Methods] Fabrication section: the assertion that the sputter-deposition + wet-chemical-etch process 'reliably produces the micrometer-scale concave grating features needed for the Rowland circle geometry' is presented without supporting metrology (SEM/AFM statistics, feature-size histograms, or edge-roughness values). This directly affects whether the observed deflections can be attributed to the designed geometry.
minor comments (2)
  1. Figure captions should explicitly state the analytical model (e.g., dispersion relation or grating equation) used for the predicted deflection angles so that readers can reproduce the comparison.
  2. Clarify the frequency range, YIG thickness, and bias-field values used in both the analytical predictions and the measurements to allow direct comparison.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for their thorough review and constructive feedback. We have carefully considered the major comments and provide point-by-point responses below. Where appropriate, we have revised the manuscript to address the concerns raised.

read point-by-point responses

  1. Referee: [Abstract / Results] Abstract and results: the central claim that 'measurements confirm analytical predictions' and that 'deflection of SW wavefronts ... closely follows the analytically predicted behavior' lacks any reported quantitative metrics (e.g., angular deviation, RMS error, or statistical comparison) or error bars. Without these, the strength of the experimental confirmation cannot be evaluated and is load-bearing for the spectrometer demonstration.

    Authors: We agree with the referee that quantitative metrics are important for rigorously evaluating the agreement between experiment and theory. Although the manuscript describes the qualitative match, we will revise the Results section to include error bars on the deflection angle data points and compute the root-mean-square (RMS) error between the measured and analytically predicted deflections. These additions will be based on the existing measurement data and will strengthen the central claim. revision: yes

  2. Referee: [Fabrication / Methods] Fabrication section: the assertion that the sputter-deposition + wet-chemical-etch process 'reliably produces the micrometer-scale concave grating features needed for the Rowland circle geometry' is presented without supporting metrology (SEM/AFM statistics, feature-size histograms, or edge-roughness values). This directly affects whether the observed deflections can be attributed to the designed geometry.

    Authors: The referee correctly identifies that metrology data is not currently included. To address this, we will add representative SEM images of the fabricated gratings along with statistical analysis of feature sizes (including mean and standard deviation from multiple measurements) and edge roughness values to the Methods section. This will confirm that the process reliably achieves the required geometry. revision: yes

Circularity Check

0 steps flagged

No significant circularity detected

full rationale

The paper is an experimental demonstration of a fabricated magnonic spectrometer whose functionality is validated by direct electrical and magneto-optical measurements of spin-wave wavefront deflection. The abstract and described argument contain no equations, no fitted parameters presented as predictions, and no load-bearing self-citations or uniqueness theorems. The match to 'analytically predicted behavior' is an external benchmark comparison rather than a self-referential derivation, leaving the central claim self-contained against fabrication and measurement evidence.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

No mathematical derivations, free parameters, or postulated entities appear in the abstract; the work is a fabrication and measurement report.

pith-pipeline@v0.9.1-grok · 5739 in / 941 out tokens · 41295 ms · 2026-06-30T04:06:11.871798+00:00 · methodology

discussion (0)

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Reference graph

Works this paper leans on

47 extracted references · 28 canonical work pages

  1. [1]

    Review on Spin-Wave RF Applications,

    K. O. Levchenko, K. Dav ´ıdkov´a, J. Mikkelsenet al., “Review on Spin-Wave RF Applications,”IEEE Transactions on Magnetics, vol. 62, no. 5, May 2026. [Online]. Available: http://dx.doi.org/10.1109/tmag. 2026.3657608

    work page doi:10.1109/tmag 2026

  2. [2]

    The 2024 magnonics roadmap,

    B. Flebus, D. Grundler, B. Ranaet al., “The 2024 magnonics roadmap,” Journal of Physics: Condensed Matter, vol. 36, no. 36, p. 363501, Jun

    2024

  3. [3]

    Available: http://dx.doi.org/10.1088/1361-648X/ad399c

    [Online]. Available: http://dx.doi.org/10.1088/1361-648X/ad399c

    work page doi:10.1088/1361-648x/ad399c

  4. [4]

    Nanoscale magnonic networks,

    Q. Wang, G. Csaba, R. Verbaet al., “Nanoscale magnonic networks,” Physical Review Applied, vol. 21, no. 4, Apr. 2024. [Online]. Available: http://dx.doi.org/10.1103/PhysRevApplied.21.040503

    work page doi:10.1103/physrevapplied.21.040503 2024

  5. [5]

    Towards graded-index magnonics: Steering spin waves in magnonic networks,

    C. S. Davies, A. Francis, A. V . Sadovnikovet al., “Towards graded-index magnonics: Steering spin waves in magnonic networks,” Physical Review B, vol. 92, no. 2, Jul. 2015. [Online]. Available: http://dx.doi.org/10.1103/PhysRevB.92.020408

    work page doi:10.1103/physrevb.92.020408 2015

  6. [6]

    Quadraticdispersionrelationsingaplessfrustration- free systems.Phys

    N. J. Whitehead, S. A. R. Horsley, T. G. Philbinet al., “Graded index lenses for spin wave steering,”Physical Review B, vol. 100, no. 9, Sep. 2019. [Online]. Available: http://dx.doi.org/10.1103/PhysRevB. 100.094404

    work page doi:10.1103/physrevb 2019

  7. [7]

    Optical elements for anisotropic spin-wave propagation,

    M. V ogel, P. Pirro, B. Hillebrandset al., “Optical elements for anisotropic spin-wave propagation,”Applied Physics Letters, vol. 116, no. 26, Jun. 2020. [Online]. Available: http://dx.doi.org/10.1063/5. 0018519

    work page doi:10.1063/5 2020

  8. [8]

    Experimental Demonstration of a Spin-Wave Lens Designed With Machine Learning,

    M. Kiechle, L. Maucha, V . Ahrenset al., “Experimental Demonstration of a Spin-Wave Lens Designed With Machine Learning,”IEEE Magnetics Letters, vol. 13, p. 1–5, 2022. [Online]. Available: http://dx.doi.org/10.1109/LMAG.2022.3209647

    work page doi:10.1109/lmag.2022.3209647 2022

  9. [9]

    Spin-Wave Optics in YIG Realized by Ion-Beam Irradiation,

    M. Kiechle, A. Papp, S. Mendischet al., “Spin-Wave Optics in YIG Realized by Ion-Beam Irradiation,”Small, vol. 19, no. 21, Feb. 2023. [Online]. Available: http://dx.doi.org/10.1002/smll.202207293

    work page doi:10.1002/smll.202207293 2023

  10. [10]

    Engineered Magnetization Dynamics of Magnonic Nanograting Filters,

    R. Yagan, F. Katmis, and M. C. Onbas ¸lı, “Engineered Magnetization Dynamics of Magnonic Nanograting Filters,”Magnetochemistry, vol. 7, no. 6, p. 81, Jun. 2021. [Online]. Available: http://dx.doi.org/10.3390/ magnetochemistry7060081

    2021

  11. [11]

    Mode selective excitation of spin waves,

    T. Taniguchi and C. H. Back, “Mode selective excitation of spin waves,”Applied Physics Letters, vol. 120, no. 3, Jan. 2022. [Online]. Available: http://dx.doi.org/10.1063/5.0080716

    work page doi:10.1063/5.0080716 2022

  12. [12]

    Nanoscale spectrum analyzer based on spin-wave interference,

    A. Papp, W. Porod, A. I. Csurgayet al., “Nanoscale spectrum analyzer based on spin-wave interference,”Scientific Reports, vol. 7, no. 1, Aug. 2017. [Online]. Available: http://dx.doi.org/10.1038/ s41598-017-09485-7

    2017

  13. [13]

    Experimental demonstration of a concave grating for spin waves in the Rowland arrangement,

    A. Papp, M. Kiechle, S. Mendischet al., “Experimental demonstration of a concave grating for spin waves in the Rowland arrangement,” Scientific Reports, vol. 11, no. 1, Jul. 2021. [Online]. Available: http://dx.doi.org/10.1038/s41598-021-93700-z

    work page doi:10.1038/s41598-021-93700-z 2021

  14. [14]

    LTE-unlicensed: the future of spectrum aggregation for cellular networks,

    R. Zhang, M. Wang, L. X. Caiet al., “LTE-unlicensed: the future of spectrum aggregation for cellular networks,”IEEE Wireless Communications, vol. 22, no. 3, p. 150–159, Jun. 2015. [Online]. Available: http://dx.doi.org/10.1109/MWC.2015.7143339

    work page doi:10.1109/mwc.2015.7143339 2015

  15. [15]

    New radio beam-based access to unlicensed spectrum: Design challenges and solutions,

    S. Lagen, L. Giupponi, S. Goyalet al., “New radio beam-based access to unlicensed spectrum: Design challenges and solutions,”IEEE Communications Surveys & Tutorials, vol. 22, no. 1, p. 8–37, 2020. [Online]. Available: http://dx.doi.org/10.1109/COMST.2019.2949145

    work page doi:10.1109/comst.2019.2949145 2020

  16. [16]

    A Unified Analytical Approach to Multi-Cell LBT-Based Spectrum Sharing Systems,

    Y . Ma, S. Mosleh, and J. B. Coder, “A Unified Analytical Approach to Multi-Cell LBT-Based Spectrum Sharing Systems,” inThe 2020 IEEE 91st Vehicular Technology Conference: VTC2020-Spring, T. . I. 91st Vehicular Technology Conference: VTC2020-Spring, Ed., 2020

    2020

  17. [17]

    Performance analysis of spatially distributed LTE-U/NR-U and Wi-Fi networks: An analytical model for coexistence study,

    A. M. Baswade, M. Reddy, A. F. A.et al., “Performance analysis of spatially distributed LTE-U/NR-U and Wi-Fi networks: An analytical model for coexistence study,”Journal of Network and Computer Applications, vol. 191, p. 103157, Oct. 2021. [Online]. Available: http://dx.doi.org/10.1016/j.jnca.2021.103157

    work page doi:10.1016/j.jnca.2021.103157 2021

  18. [18]

    Towards Software-Centric Listen-Before-Talk on Software-Defined Radios,

    S. Brauer, A. Zubow, and F. Dressler, “Towards Software-Centric Listen-Before-Talk on Software-Defined Radios,” in2021 IEEE Wireless Communications and Networking Conference (WCNC). IEEE, Mar. 2021, p. 1–7. [Online]. Available: http://dx.doi.org/10.1109/ WCNC49053.2021.9417395

    work page arXiv 2021

  19. [19]

    3gpp release 18 wake-up receiver: Feature overview and evaluations,

    A. H ¨oglund, M. Mozaffari, Y . Yanget al., “3gpp release 18 wake-up receiver: Feature overview and evaluations,”IEEE Communications Standards Magazine, vol. 8, no. 3, p. 10–16, Sep. 2024. [Online]. Available: http://dx.doi.org/10.1109/MCOMSTD.0001.2400002

    work page doi:10.1109/mcomstd.0001.2400002 2024

  20. [20]

    James,Spectrograph Design Fundamentals

    J. James,Spectrograph Design Fundamentals. Cambridge University Press, 2007

    2007

  21. [21]

    Theory of dipole-exchange spin wave spectrum for ferromagnetic films with mixed exchange boundary conditions,

    B. A. Kalinikos and A. N. Slavin, “Theory of dipole-exchange spin wave spectrum for ferromagnetic films with mixed exchange boundary conditions,”Journal of Physics C: Solid State Physics, vol. 19, no. 35, p. 7013–7033, Dec. 1986. [Online]. Available: http://dx.doi.org/10.1088/0022-3719/19/35/014

    work page doi:10.1088/0022-3719/19/35/014 1986

  22. [22]

    Radio Regulations Articles,

    ITU, “Radio Regulations Articles,” International Telecommunication Union, Tech. Rep., 2024

    2024

  23. [23]

    Secondary Excitation of Spin Waves: How Electromagnetic Crosstalk Impacts Magnonic Devices,

    J. Greil, M. Golibrzuch, M. Kiechleet al., “Secondary Excitation of Spin Waves: How Electromagnetic Crosstalk Impacts Magnonic Devices,” IEEE Transactions on Magnetics, vol. 59, no. 11, p. 1–5, Nov. 2023. [Online]. Available: http://dx.doi.org/10.1109/TMAG.2023.3292545

    work page doi:10.1109/tmag.2023.3292545 2023

  24. [24]

    Modeling interference of spin-waves and electromagnetic leakage in micron-scaled spin-wave transducers,

    F. Kohl, B. Heinz, M. Wagneret al., “Modeling interference of spin-waves and electromagnetic leakage in micron-scaled spin-wave transducers,”Applied Physics Letters, vol. 128, no. 16, Apr. 2026. [Online]. Available: http://dx.doi.org/10.1063/5.0308357

    work page doi:10.1063/5.0308357 2026

  25. [25]

    Spin-wave transduction at the submicrometer scale: Experiment and modeling,

    V . Vlaminck and M. Bailleul, “Spin-wave transduction at the submicrometer scale: Experiment and modeling,”Physical Review B, vol. 81, no. 1, Jan. 2010. [Online]. Available: http://dx.doi.org/10.1103/ PhysRevB.81.014425

    2010

  26. [26]

    Electrical spectroscopy of forward volume spin waves in perpendicularly magnetized materials,

    M. Sushruth, M. Grassi, K. Ait-Oukaciet al., “Electrical spectroscopy of forward volume spin waves in perpendicularly magnetized materials,” Physical Review Research, vol. 2, no. 4, Nov. 2020. [Online]. Available: http://dx.doi.org/10.1103/PhysRevResearch.2.043203

    work page doi:10.1103/physrevresearch.2.043203 2020

  27. [27]

    Efficient electromagnetic transducers for spin-wave devices,

    D. A. Connelly, G. Csaba, H. R. O. Aquinoet al., “Efficient electromagnetic transducers for spin-wave devices,”Scientific Reports, vol. 11, no. 1, Sep. 2021. [Online]. Available: http://dx.doi.org/10.1038/ s41598-021-97627-3

    2021

  28. [28]

    Optimizing propagating spin wave spectroscopy,

    J. Lucassen, C. F. Schippers, L. Ruttenet al., “Optimizing propagating spin wave spectroscopy,”Applied Physics Letters, vol. 115, no. 1, Jul

  29. [29]

    Available: http://dx.doi.org/10.1063/1.5090892

    [Online]. Available: http://dx.doi.org/10.1063/1.5090892

    work page doi:10.1063/1.5090892

  30. [30]

    R. N. Simons,Coplanar Waveguide Circuits, Comonent, and Systems, John Wiley $ Sons, Inc., Ed. John Wiley $ Sons, Inc., 2001

    2001

  31. [31]

    Lumped circuit model for inductive antenna spin-wave transducers,

    F. Vanderveken, V . Tyberkevych, G. Talmelliet al., “Lumped circuit model for inductive antenna spin-wave transducers,”Scientific Reports, vol. 12, no. 1, Mar. 2022. [Online]. Available: http: //dx.doi.org/10.1038/s41598-022-07625-2

    work page doi:10.1038/s41598-022-07625-2 2022

  32. [32]

    Design rules for low-insertion- loss magnonic transducers,

    R. Erd ´elyi, G. Csaba, L. Mauchaet al., “Design rules for low-insertion- loss magnonic transducers,”Scientific Reports, vol. 15, no. 1, Mar. 2025. [Online]. Available: http://dx.doi.org/10.1038/s41598-025-94474-4

    work page doi:10.1038/s41598-025-94474-4 2025

  33. [33]

    Magnetoresistive detection of spin waves,

    Q. Rossi, D. Stoeffler, G. De Loubens, H. Merbouche, H. Majjad, Y . Henry, I. Ngouagnia, A. Solignac, and M. Bailleul, “Magnetoresistive detection of spin waves,”Science Advances, vol. 11, no. 33, Aug

  34. [34]

    Available: http://dx.doi.org/10.1126/sciadv.adx4126

    [Online]. Available: http://dx.doi.org/10.1126/sciadv.adx4126

    work page doi:10.1126/sciadv.adx4126

  35. [35]

    Dispersion- tunable low-loss implanted spin-wave waveguides for large magnonic networks,

    J. Bensmann, R. Schmidt, K. O. Nikolaevet al., “Dispersion- tunable low-loss implanted spin-wave waveguides for large magnonic networks,”Nature Materials, vol. 24, no. 12, p. 1920–1926, Jul. 2025. [Online]. Available: http://dx.doi.org/10.1038/s41563-025-02282-y

    work page doi:10.1038/s41563-025-02282-y 1920

  36. [36]

    Establishing the Magnetoelastic Origin of Spin-Wave Routing through Focused Ion Beam Patterning,

    F. Naunheimer, J. Greil, V . Ahrenset al., “Establishing the Magnetoelastic Origin of Spin-Wave Routing through Focused Ion Beam Patterning,” 2026. [Online]. Available: https://arxiv.org/abs/2602.10797

    work page arXiv 2026

  37. [37]

    Roadmap for focused ion beam technologies,

    K. H ¨oflich, G. Hobler, F. I. Allenet al., “Roadmap for focused ion beam technologies,”Applied Physics Reviews, vol. 10, no. 4, Dec

  38. [38]

    Available: http://dx.doi.org/10.1063/5.0162597

    [Online]. Available: http://dx.doi.org/10.1063/5.0162597

    work page doi:10.1063/5.0162597

  39. [39]

    The effect of ga-ion irradiation on sub-micron-wavelength spin waves in yttrium-iron-garnet films,

    J. Greil, M. Kiechle, A. Pappet al., “The effect of ga-ion irradiation on sub-micron-wavelength spin waves in yttrium-iron-garnet films,” Nanotechnology, vol. 36, no. 13, p. 135301, Feb. 2025. [Online]. Available: http://dx.doi.org/10.1088/1361-6528/adad7d

    work page doi:10.1088/1361-6528/adad7d 2025

  40. [40]

    5G; NR; Base Station (BS) radio transmission and reception,

    3GPP, “5G; NR; Base Station (BS) radio transmission and reception,” 3GPP TS 38.104 version 18.5.0, May 2024, release 18

    2024

  41. [41]

    IEEE 802.11be-2024,

    802.11 Wireless LAN Working Group, “IEEE 802.11be-2024,” IEEE Standards Association, Tech. Rep., 2024

    2024

  42. [42]

    Bat63-02v: Single silicon rf schottky diode,

    I. Technologies, “Bat63-02v: Single silicon rf schottky diode,” online,

  43. [43]

    Available: https://www.infineon.com/part/BAT63-02V

    [Online]. Available: https://www.infineon.com/part/BAT63-02V

  44. [44]

    Ads131m08 8-channel, simultaneously-sampling, 24- bit, delta-sigma adc,

    T. Instruments, “Ads131m08 8-channel, simultaneously-sampling, 24- bit, delta-sigma adc,” online, 2021. [Online]. Available: https: //www.ti.com/product/de-de/ADS131M08

    2021

  45. [45]

    EN 301 893 V2.2.1 (2024-11): GHz W AS/RLAN; Harmonised Standard for access to radio spectrum,

    ETSI, “EN 301 893 V2.2.1 (2024-11): GHz W AS/RLAN; Harmonised Standard for access to radio spectrum,” European Telecommunications Standards Institute, Tech. Rep., 2024

    2024

  46. [46]

    Characterizing the linearity of magnonic devices for radio-frequency applications,

    R. Erdelyi, A. P. L. Maucha, P. Pirroet al., “Characterizing the linearity of magnonic devices for radio-frequency applications,” 2026. [Online]. Available: https://arxiv.org/abs/2603.27470

    work page arXiv 2026

  47. [47]

    Thumm, W

    M. Thumm, W. Wiesbeck, and S. Kern,Hochfrequenzmesstechnik Ver- fahren und Messsysteme, 2nd ed. Wiesbaden: Vieweg+Teubner Verlag, 1998. 8 APPENDIXA ANALYTICALMODELS ANDCALCULATIONS A. Analytical Dispersion Relation and Group Velocity We used the SW dispersion relation developed by Kalinikos and Slavin [20] to calculate ω= » (ω0 +ω Mλexk2)(ω0 +ω Mλexk2 +ω ...

    1998