Investigation of the DGS-CDRA Design with the Aperture Coupling Technique for Wide Band Application
In this paper, a design of wideband antenna by tuning the aperture slot parameters and using two dielectric pellets is investigated and discussed. The performance of the resonant frequencies, impedance bandwidth and radiation pattern of the DGS-CDRA (Defe
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Abstract In this paper, a design of wideband antenna by tuning the aperture slot parameters and using two dielectric pellets is investigated and discussed. The performance of the resonant frequencies, impedance bandwidth and radiation pattern of the DGS-CDRA (Defected Ground Structure Cylindrical Dielectric Resonator Antenna) are analyzed. The design achieved a wideband impedance bandwidth of 4.0 GHz (50.74 %) by using two slots aperture and thick substrate. Two dielectric pellets with the same type and size are coupled to a microstrip line through two rectangular slots. The slots positions are tuned along (below) microstrip line to a position where impedance bandwidth from both dielectric pellets are merged and form a wide impedance bandwidth. Subsequently, performance of the antenna is being analyzed based on the simulation results of return loss and radiation pattern. The design is fabricated and the measurement results of impedance bandwidth are compared with the simulation results. Keywords Wide band
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DGS-CDRA
S.M. Che Abdullah (✉) ⋅ N.M. Nor (✉) ⋅ M.A. Zakariya ⋅ S.M. Ali Electrical and Electronics Engineering Department, Universiti Teknologi PETRONAS, Tronoh, Malaysia e-mail: [email protected] N.M. Nor e-mail: [email protected] M.A. Zakariya e-mail: [email protected] S.M. Ali e-mail: [email protected] H. Daud Fundamental and Applied Science Department, Universiti Teknologi PETRONAS, Tronoh, Malaysia e-mail: [email protected] © Springer Science+Business Media Singapore 2017 H. Ibrahim et al. (eds.), 9th International Conference on Robotic, Vision, Signal Processing and Power Applications, Lecture Notes in Electrical Engineering 398, DOI 10.1007/978-981-10-1721-6_61
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1 Introduction The design of DRA provides a large degree of freedom and makes them complicated since a lot of variable interplay with each other [1]. It is possible to design the DRA to operate at any rational input impedance and also eliminating the need of matching circuit by having a good understanding on its physic studies. Many complex design of DRA can be exploited [2–5]. The techniques for tuning the impedance bandwidth of the DRA can be categorized into three approaches: multiples resonance, aperture coupled and hybrid resonator. In this paper, aperture coupled technique is implemented and discussed. The approach of aperture coupled technique reported that method exhibits with the impedance bandwidth of 10–24 % [5–7]. In this technique, the active devices are integrated on dielectric substrate on the same side of the feed network and enabling the use of DR antenna with monolithic microwave integrated circuits (MMIC’s). Furthermore, the aperture-coupled technique together with hemispherical shape of DRA and a parasitic patch providing wide range of frequency tuning characteristics and bandwidth enhancement features [8]. The wide band applications are also achievable with the array configuration [9, 10]. It is reported that the design of seven elements r
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