EKLEMELİ İMALAT YÖNTEMİYLE ÜRETİLEN REFLEKTÖR DESTEKLİ SUB-6 GHZ BOW-TIE ANTEN

Abstract

Bu çalışma, alt sub-6 GHz frekans spektrumunun alt kısmında çalışan, kazancı artırılmış bow-tie anten tasarımını sunmaktadır. Bu frekans aralığı, geniş bant kablosuz haberleşme ve algılama uygulamaları açısından önemlidir. Önerilen anten, bir dielektrik altlık üzerinde her iki tarafta simetrik olarak yerleştirilmiş, iç içe geçmiş eşkenar üçgensel elemanlardan oluşan çapraz bir geometriye sahiptir. Bu yapı, karmaşık empedans eşleme ağlarına ihtiyaç duymadan birden fazla etkin akım yolu oluşturarak geniş bir empedans bant genişliği elde edilmesini sağlamaktadır. Anten, ergiterek yığma modeli (FDM) tabanlı 3B yazıcı kullanılarak PREPERM ABS800 filament ile üretilmiştir. Gerçeklenen kazancı artırmak amacıyla, iletken bir katman içeren dielektrik destekli bir reflektör, ışıyıcı yapının altına entegre edilmiş ve dört adet dielektrik destek ayağı ile mekanik olarak sabitlenmiştir. Deneysel ölçümler, antenin 1.2-3.1 GHz arasında çalıştığını ve 1.9 GHz’lik mutlak bant genişliği sunduğunu göstermektedir. Sonuçlar reflektörün eklenmesiyle kazancın yaklaşık 2.6–3.7 dBi seviyelerinden 4.5–5.7 dBi aralığına yükseldiğini ortaya koymaktadır. Elde edilen sonuçlar, önerilen tasarımın üretimi kolay, geniş bantlı ve tutarlı kazanç artışı sunan bir anten çözümü olduğunu göstermektedir.

Keywords

• Bow-tie anten
• Sub-6 GHz
• Genişbant
• Eklemeli imalat
• Anten kazancı

ADDITIVELY MANUFACTURED REFLECTOR-BACKED SUB-6 GHZ BOW-TIE ANTENNA

Abstract

This study presents a gain enhanced bow-tie antenna operating in the lower portion of the sub-6 GHz frequency spectrum, which is of interest for broadband wireless and sensing applications. The proposed antenna is based on a crossed geometry formed by nested equilateral triangular elements symmetrically arranged on both sides of a dielectric substrate, enabling multiple effective current paths and wide impedance bandwidth without the need for complex matching networks. The antenna is fabricated using fused deposition modeling (FDM) technology with PREPERM ABS800 filament. To enhance the realized gain, a dielectric-backed reflector incorporating a conductive layer is integrated beneath the radiating structure and mechanically supported by four dielectric posts. Experimental measurements show that the proposed antenna covers a measured bandwidth from 1.2 GHz to 3.1 GHz, resulting in an absolute bandwidth of 1.9 GHz. The results further indicate that the inclusion of the reflector provides a clear realized gain enhancement across the operating band, increasing the gain from approximately 2.6–3.7 dBi to about 4.5–5.7 dBi. These results confirm that the proposed design offers a fabrication friendly, and broadband antenna solution with consistent gain enhancement, making it suitable for lower sub-6 GHz wireless and sensing systems.

Keywords

• Bow-tie antenna
• Sub-6 GHz
• Wideband
• Additive manufacturing
• Antenna Gain

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