A Novel Narrow Band-pass Frequency Selective Surface Design for Radome Applications

Öz

This paper proposes a narrow-bandpass frequency-selective surface (FSS) design for S-band radomes that transmits RF signals between 2.7 and 2.9 GHz frequencies while exhibiting fully reflective characteristics for all other frequencies. The FSS radome protects the sensitive internal components from external RF noise and jamming attempts, improving system robustness and electromagnetic compatibility. The FSS radome reflects the signal out of the band, allowing the radar cross-section to be reduced by shaping. Despite the availability of numerous band-stop and wide-band designs in the existing literature, it is observed that there is a limited number of narrow-band band-pass designs. The intended use of the FSS for radomes has necessitated a narrow pass-band and a stable frequency response for wide oblique incidence angles. A novel band-pass FSS structure is proposed in this work by incorporating complementary resonant elements and an inductive grid. Stable frequency behavior is achieved through a significant reduction in unit cell dimensions. A comparative analysis indicates that the presented structure effectively meets its design goals and offers notable advantages over conventional slot-only FSS configurations.

Anahtar Kelimeler

• Frequency selective surface
• FSS
• periodic structures
• radome

Destekleyen Kurum

No funding or supporting institution is associated with this study.

Etik Beyan

This article is based on the undergraduate thesis titled 'A Narrow Band-Pass Frequency Selective Surface Design,' conducted in 2024 at the Faculty of Electrical and Electronics Engineering, Istanbul Technical University.

Radom Uygulamaları için Yeni Bir Dar Bant Geçiren Frekans Seçici Yüzey Tasarımı

Öz

Bu çalışma, S-band radom uygulamaları için 2.7–2.9 GHz frekans aralığında RF sinyallerini ileten ve diğer tüm frekanslarda tamamen yansıtıcı özellik sergileyen dar bant geçiren bir frekans-seçici yüzey (FSY) tasarımı önermektedir. FSY radom, hassas iç bileşenleri harici RF gürültüsüne ve karıştırma girişimlerine karşı koruyarak sistemin dayanıklılığını ve elektromanyetik uyumluluğunu artırır. Aynı zamanda, bant dışı sinyalleri yansıtarak elektromanyetik şekillendirme yoluyla radar kesit alanının (RCS) azaltılmasına olanak tanımaktadır. Mevcut literatürde çok sayıda bant-durdurucu ve geniş bant tasarımı bulunmasına rağmen, dar bant geçiren yapıların sınırlı sayıda olduğu gözlemlenmiştir. Radom uygulamaları için öngörülen kullanım, dar bir geçiş bandı ve geniş eğik geliş açıları altında kararlı bir frekans tepkisi gerektirmektedir. Bu çalışmada, tamamlayıcı rezonans elemanları ve endüktif bir ızgara içeren özgün bir bant geçiren FSS yapısı önerilmektedir. Birim hücre boyutlarının önemli ölçüde küçültülmesi sayesinde frekans tepkisi kararlılığı sağlanmıştır. Yapılan karşılaştırmalı analizler, sunulan yapının tasarım hedeflerini etkin biçimde karşıladığını ve geleneksel yalnızca yarık tabanlı FSS yapılarına kıyasla dikkate değer avantajlar sunduğunu ortaya koymaktadır.

Anahtar Kelimeler

• Frekans seçici yüzey
• FSY
• periyodik yapılar
• radome

Destekleyen Kurum

Destekleyen kurum bulunmamaktadır.

Etik Beyan

Bu makale, 2024 yılında İstanbul Teknik Üniversitesi Elektrik ve Elektronik Fakültesi’nde yürütülen “Dar Bant Geçiren Frekans Seçici Yüzey Tasarımı” başlıklı lisans tezine dayanmaktadır.

Kaynakça

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