Planar Sub-THz Bandpass Filter Based on a Cross-Arrow Slot FSS for Radar and Secure Communication Applications

Authors

  • Anitha George School of Engineering, Cochin University of Science and Technology, Kerala
  • Abdulla P School of Engineering, Cochin University of Science and Technology, Kerala
  • Nabeel A.M. School of Engineering, Cochin University of Science and Technology, Kerala
  • Pranav P.R. School of Engineering, Cochin University of Science and Technology, Kerala

DOI:

https://doi.org/10.61779/jasetm.v4i1.2

Keywords:

Cross Arrow slot, Frequency Selective Surface, Sub Terahertz

Abstract

A cross-arrow slot frequency selective surface (FSS) is proposed for sub-terahertz (sub-THz) bandpass filtering, of-fering enhanced spectral performance over conventional cross-shaped designs. Full-wave simulations in CST Studio Suite demonstrate a sharp transmission peak (S21) of −0.3 dB at 0.175 THz, with a −10 dB bandwidth of 25 GHz and a quality factor (Q) of 6.5. The design achieves excellent impedance matching, as indicated by a reflection coefficient (S11) of −37 dB. The arrow-shaped slot extensions promote strong current confine-ment, resulting in high spectral selectivity and low insertion loss. Parametric tuning enables resonance shifting across the 0.15 THz – 0.25 THz range, covering a wide portion of the sub-THz spectrum. All simulations were done in the CST microwave suite, and the results were validated in HFSS software. The proposed filter is also suitable for military sub-THz systems, including secure high-data-rate communication links, radar front-ends, and spectrum-selective sensing applications.

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Published

16-07-2026

How to Cite

George, A., P, A., A.M., N., & P.R., P. (2026). Planar Sub-THz Bandpass Filter Based on a Cross-Arrow Slot FSS for Radar and Secure Communication Applications. Journal of Applied Science, Engineering, Technology and Management, 4(1), 09–12. https://doi.org/10.61779/jasetm.v4i1.2

Issue

Vol. 4 No. 1 (2026): Journal of Applied Science, Engineering, Technology and Management

Section

Articles

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Copyright (c) 2026 Anitha George, Abdulla P, Nabeel A.M., Pranav P.R.

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