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A new simple compact ultra-wideband dielectric resonator antenna with enhanced bandwidth and improved radiation pattern

Published online by Cambridge University Press:  26 January 2015

Seyyed Hadi Seyyedhatami  and
Ramazan Ali Sadeghzadeh
Seyyed Hadi Seyyedhatami*
Affiliation:
Department of Electrical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
Ramazan Ali Sadeghzadeh
Affiliation:
Faculty of Electrical and Computer Engineering, K. N. Toosi University of Technology, Tehran, Iran
*
Corresponding author: S. H. Seyyedhatami Email: [email protected]
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Abstract

A new simple compact ultra-wideband (UWB) dielectric resonator antenna is presented. The antenna consists of a modified stepped microstrip-fed monopole printed antenna loaded with a rectangular dielectric resonator, truncated ground plane, and a parasitic strip underneath the dielectric resonator (DR). Using an optimized truncated ground plane and a combination of stepped feed line with DR an ultra-wide impedance bandwidth of 153% for (∣S11∣ ≤ −10 dB), covering the frequency range of (3.7–28 GHz) is achieved. The added parasitic strip can improve the radiation pattern, especially at high frequencies. The proposed antenna covers almost the entire UWB (3.1–10.6 GHz), Ku (12.4–18 GHz), and K (18–26.6 GHz) frequency bands. Also this antenna has an omnidirectional and stable radiation pattern over the whole operating frequency range and a compact size of (15 × 20 × 5.8 mm3) that make it suitable for wideband wireless system applications. This structure is light weight and can be easily fabricated. A prototype is built and measured. The simulated and measured results are in good agreement.

Keywords

Dielectric resonator antennaUltra-wideband antennaRectangular dielectric resonator
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Issue 2 , March 2016 , pp. 335 - 340
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2015 

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References

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