TELEMETRİ İLETİŞİMİ İÇİN KARBON FİBER KOMPOZİTE GÖMÜLÜ FSS BANT GEÇİREN FİLTRE

Emin Ünal; Sena Türker; İlknur Keskin; Olcay Altıntaş

doi:10.17780/ksujes.1796330

TR EN

TELEMETRİ İLETİŞİMİ İÇİN KARBON FİBER KOMPOZİTE GÖMÜLÜ FSS BANT GEÇİREN FİLTRE

Öz

Günümüzde hava araçları teknolojisi giderek ilerlemekte ve buna paralel olarak kullanım alanları da artmaktadır. Hava araçlarının gövde yapısında karbon fiber malzeme, yüksek dayanıklılığı ve hafifliği nedeniyle yaygın olarak tercih edilmektedir. Ancak, bu malzeme aşırı kayıplıdır. Karbon fiber gövdeli hava araçlarında, 868-900 MHz frekans bandında haberleşmeyi sağlayabilmek için karbon fiber gövde üzerine belirli boyutlarda dikdörtgen yarıklar açılarak, merkez frekansı 900 MHz olan, bant geçiren filtre özelliği gösteren FSS tasarlanmıştır. Tasarım FIT tabanlı bir simülasyon programı ile gerçekleştirilmiş, boyutlar optimize edilmiş, karbon fiber levhanın üretimi gerçekleştirilmiş ve üzerine optimize edilen boyutlarda yarıklar açılmıştır. Üretilen numunelerin ölçümleri PNA-L Vektör Ağ Analizörü kullanılarak gerçekleştirilmiştir. Yarık açılmadan 900 MHz’de, bant durduran filtre gibi davranan karbon fiber yapı, yarıklar açıldıktan sonra 900 MHz’de bant geçiren filtre özelliği göstermeye başlamıştır. Yarıksız karbon fiber levha için 900 MHz'de maksimum -6,57 dB olan IL değeri, yarıklar açıldıktan sonra -1,66 ‘ya düşmüştür. Ayrıca, yarıksız karbon fiber levha için 900 MHz'de maksimum -4,66 dB olan RL değeri, yarıklar açıldıktan sonra -23,84 olarak elde edilmiştir. Ayrıca, Önerilen bant geçiren filtre, 820 ile 1100 MHz (kesirli bant genişliğinin %31,11'i) arasında değişen -3 dB'lik bir iletim bandı sergiledi.

Anahtar Kelimeler

BANDPASS FILTER BASED ON FSS EMBEDDED IN CARBON FIBER COMPOSITE FOR TELEMETRY COMMUNICATION

Abstract

The rapid advancement of aerospace technology has increased the use of lightweight and durable materials in aircraft structures. Carbon fiber composites are widely preferred due to their high strength-to-weight ratio, although their inherently lossy nature limits their electromagnetic performance. To ensure reliable telemetry communication in the 868–900 MHz frequency band, a frequency selective surface (FSS)–based bandpass filter was designed by etching rectangular slots onto a carbon fiber composite plate. The design, centered at 900 MHz, was optimized using a finite integration technique (FIT)–based simulation tool. A prototype carbon fiber plate was fabricated, and the optimized slots were machined onto it. Measurements were performed using a PNA-L Vector Network Analyzer.Before slotting, the carbon fiber plate exhibited bandstop filter characteristics at 900 MHz. After slotting, it demonstrated bandpass behavior with a maximum insertion loss of –1.66 dB and a return loss of –23.84 dB, compared to –6.57 dB and –4.66 dB for the unslotted plate, respectively. The proposed filter provided a –3 dB transmission bandwidth from 820 MHz to 1100 MHz, corresponding to a 31.11% fractional bandwidth.

Keywords

References

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Details

Primary Language

Turkish

Subjects

Engineering Electromagnetics

Journal Section

Research Article

Authors

Emin Ünal
0000-0002-4088-8353
Türkiye

Sena Türker
0009-0003-7801-2618
Türkiye

İlknur Keskin
0009-0009-4321-3510
Türkiye

Olcay Altıntaş ^*
0000-0003-3237-4392
Türkiye

Publication Date

March 3, 2026

Submission Date

October 3, 2025

Acceptance Date

January 12, 2026

Published in Issue

Year 2026 Volume: 29 Number: 1

DOI

https://doi.org/10.17780/ksujes.1796330

IZ

https://izlik.org/JA66UR65NC

Cite

RIS / Bibtex

APA

Ünal, E., Türker, S., Keskin, İ., & Altıntaş, O. (2026). TELEMETRİ İLETİŞİMİ İÇİN KARBON FİBER KOMPOZİTE GÖMÜLÜ FSS BANT GEÇİREN FİLTRE. Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi, 29(1), 218-228. https://doi.org/10.17780/ksujes.1796330