Yavaş dalgalı mikroşerit yapılarla iki ve dört yollu Wilkinson güç bölücü tasarımı

Öz

Bu çalışmada, geleneksel Wilkinson güç bölücüsü iletim hatları menderes yapılar ile modifiye edilerek, ardışık olarak iki ve üç kez bağlanmış iki yollu ve iki kez ardışık bağlanmış dört yollu mikroşerit güç bölücü devreleri sunulmaktadır. Tasarımlarda bağıl dielektrik sabiti 10.2 ve yüksekliği 1.27 mm olan RT/Duroid alt tabaka kullanılmış; elektromanyetik simülasyon programı ile frekans cevapları optimize edilmiştir. Güç bölücülerde her bir bağlantı noktasına 100 ohm direnç yerleştirilmiş ve bu sayede izolasyon ile bant genişliğinin artırılması sağlanmıştır. İki kez ardışık bağlanmış iki yollu yapıda 0.17-1.36 GHz bandında ortalama geri dönüş kaybı-14.45 dB, iletim kaybı-3.40 dB ve izolasyon değeri -13.25 dB olarak hesaplanmıştır. Ayrıca, 2.24-2.97 GHz frekans bandında geri dönüş kaybı -15.45 dB, iletim kaybı -3.50 dB ve izolasyon değeri -15.93 dB olarak ölçülmüştür. Üç kez ardışık bağlanmış yapıda ise 0.11-1.05 GHz arasında ortalama geri dönüş kaybı-14.73 dB, iletim kaybı -3.38 dB ve izolasyon değeri -12.20 dB; 1.36-2.10 GHz arasında ortalama geri dönüş kaybı -15.21 dB, iletim kaybı -3.54 dB ve izolasyon değeri -15.34 dB; 2.59-3.14 GHz arasında ise ortalama geri dönüş kaybı -17.52 dB, iletim kaybı -3.65 dB ve izolasyon değeri -14.03 dB olarak ölçülmüştür. Dört yollu, iki kez ardışık bağlanmış yapıda ise 0.47-1.17 GHz aralığında ortalama geri dönüş kaybı -20.65 dB, iletim kaybı -6.17 dB ve izolasyon değeri -16.74 dB olarak ölçülmüştür. Tasarlanan devreler imal edilmiş ve simülasyon sonuçlarının ölçüm sonuçlarıyla uyumlu olduğu gözlenmiştir.

Anahtar Kelimeler

• Wilkinson güç bölücü
• kaskat bağlı
• iki yollu güç bölücü
• dört yollu güç bölücü
• menderes yapı

Two-and four-way Wilkinson power divider design with slow-wave microstrip structures

Abstract

In this study, conventional Wilkinson power dividers have been modified with meandered transmission line structures, resulting in two-port power dividers with either two or three serial connections and four-port power dividers with two serial connections. A substrate with a relative permittivity of 10.2 and a height of 1.27 mm, RT/Duroid, was used for the designs, and frequency responses were optimized using an electromagnetic simulation program. To enhance isolation and bandwidth, 100-ohm resistors were placed at each connection point in the power dividers. In the two-port configuration with two serial connections, the average return loss was -14.45 dB, insertion loss was -3.40 dB, and isolation was -13.25 dB over the 0.17-1.36 GHz band. Additionally, in the 2.24-2.97 GHz frequency band, the return loss was -15.45 dB, insertion loss was -3.50 dB, and isolation was -15.93 dB. In the three-port configuration with three serial connections, the average return loss was -14.73 dB, insertion loss was -3.38 dB, and isolation was -12.20 dB over the 0.11-1.05 GHz range; -15.21 dB return loss, -3.54 dB insertion loss, and -15.34 dB isolation over the 1.36-2.10 GHz range; and -17.52 dB return loss, -3.65 dB insertion loss, and -14.03 dB isolation over the 2.59-3.14 GHz range. In the four-port configuration with two serial connections, the average return loss was -20.65 dB, insertion loss was -6.17 dB, and isolation was -16.74 dB in the 0.47-1.17 GHz range. The designed circuits were fabricated, and it was observed that the simulation results were consistent with the measurement results.

Keywords

• Wilkinson power divider
• cascade connected power divider
• two-way power divider
• meandered structure

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