Bandwidth Optimization of an Ultra Wide Band Vivaldi Antenna Design with Its Feed Alignment

Abstract

Ultra wide band applications such as medical imaging, surveillance or indoor localization require different bandwidths. The different bandwidth requirements often present a challenge in terms of antenna design. In this paper, a wideband Vivaldi antenna which is suitable for UWB systems is presented. The antenna is designed and optimized using a 3D electromagnetic simulation tool. Then, a parametric study is carried out that investigates the effect of microstrip feed on the antennas bandwidth. It is demonstrated that the bandwidth of the antenna can be manipulated by changing the total length and the positioning of the microstrip feed without the need for changing any other antenna parameter

Keywords

• Vivaldi
• Ultra wideband
• Microstrip feed

Ultra Geniş Bant Vivaldi Anten Tasarımında Besleme Hattının Hizalanması ile Bant Genişliği Optimizasyonu

Öz

Tıbbi görüntüleme, gözetleme veya iç mekan lokalizasyonu gibi ultra geniş bant uygulamaları farklı bant genişlikleri gerektirir. Farklı bant genişliği gereksinimleri genellikle anten tasarımı açısından zorluk teşkil etmektedir. Bu çalışmada ultra geniş bant sistemlerine uygun geniş bantlı bir Vivaldi anten sunulmaktadır. Anten, 3 boyutlu bir elektromanyetik simülasyon aracı kullanılarak tasarlanmış ve optimize edilmiştir. Daha sonra mikroşerit beslemenin anten bant genişliği üzerindeki etkisinin araştırıldığı parametrik bir çalışma yapılmıştır. Antenin bant genişliğinin, başka herhangi bir anten parametresini değiştirmeye gerek kalmadan, mikroşerit beslemenin toplam uzunluğu ve konumu değiştirilerek değiştirilebileceği gösterilmiştir.

Anahtar Kelimeler

• Vivaldi
• Ultra geniş bant
• Mikroşerit besleme

Kaynakça

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