Compact Rack Shaped MIMO Dielectric Resonator Antenna with Improved Axial Ratio for UWB Applications
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Compact Rack Shaped MIMO Dielectric Resonator Antenna with Improved Axial Ratio for UWB Applications Sachin Kumar Yadav1 · Amanpreet Kaur1 · Rajesh Khanna1
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In this paper, a rack shaped two radiator element multiple input multiple output (MIMO) dielectric resonator antenna (DRA) is reported with improved axial ratio (AR) characteristics for ultra-wideband applications. The proposed MIMO antenna structure is implemented with the help of two rectangular shaped radiator elements which are further changed into rack shaped dielectric resonator (DR) that support three modes H EM111, HEM121, and HEM212, at 7.3, 9.3, 10.74 GHz respectively. The approach of rack shaped DRA has improved the transmission coefficient for the UWB range. Inverted T-shaped metallic strip apart from giving elliptically polarized (EP) characteristics also helps in controlling both the axial ratio bandwidth and impedance bandwidth (101.87%). The simulated and measured outcomes validated that the proposed antenna can be utilized for 3.54– 10.89 GHz ultra-wideband (UWB) frequency range. The MIMO diversity parameters are implemented as ECC ≤ 0.0059, DG ≥ 9.93 dB, TARC (0, 30, 60, 90, 120, 150, and 180) degrees, GD (0.96 to − 2.1 ns) and CCL (≤ 0.4 except of 8.8–9.6 GHz). All the obtained MIMO antenna parameters are within the acceptable limit and also provides high data rate applications in C and X bands. Keywords Rack shaped dielectric resonator · Rectangular dielectric resonator · Multiple input multiple output (MIMO) · Transformer type fed · Ultra-wideband (UWB)
1 Introduction Ultra-wideband (UWB) range, which were restored when the Federal Communications Commission characterized (FCC) the 3.1–10.6 GHz unlicensed band, have pulled in enormous consideration in wireless sensor systems, just as in the biomedical and * Sachin Kumar Yadav [email protected] Amanpreet Kaur [email protected] Rajesh Khanna [email protected] 1
Electronics and Communication Engineering Department, Thapar Institute of Engineering and Technology (Deemed to be University), Patiala, India
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medicinal services wireless system due to their low power spectral density, basic equipment design, high information transmission rates, minimal effort, high accuracy extending ability and low power utilization [1]. As far as UWB antenna configuration, there are a few difficulties to be tackled to accomplish minimized receiving wire estimate, high radiation effectiveness, and consistent addition while limiting electromagnetic obstructions from adjacent narrowband systems. In past few decades, Dielectric resonator antenna (DRA) has fronted for UWB applications as a result of many striking characteristics like low conductor losses, high radiation efficiency, a high degree of design flexibility, and easy to excitation [2, 3]. Small size is chosen for dielectric resonator (DR), high permittivity material selected because dimension of DR is inve
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