Implementation of Vertex-Fed Multiband Antenna for Wireless Applications with Frequency Band Reconfigurability Character
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Implementation of Vertex‑Fed Multiband Antenna for Wireless Applications with Frequency Band Reconfigurability Characteristics Ritesh Kumar Saraswat1 · Mithilesh Kumar2
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In this paper authors present the design and analysis of split ring resonator based multiband antenna for wireless applications with frequency-band reconfigurable features. The proposed design has octagonal shape SRR structure fed at vertex as radiating section and rectangular shape switchable slotted ground part. The antenna has dimensions of 44 × 39 × 1.6 mm3 and fabricated on FR4 substrate. The proposed structure exhibit hexa operating resonance characteristics at 3.3, 5.0, 5.8, 6.6, 9.9 and 15.9 GHz to cover the wireless standards at lower WiMAX, upper WLAN, super extended C-band, middle X band and lower KU band respectively. Antenna achieve the frequency band reconfigurability characteristics by inserting PIN diode in slotted ground (reclined L-shaped) as triple/hexa resonant bands during OFF/ON switching state of PIN diode. An acceptable gain, stable and consistent radiation patterns with low cross polarization and good impedance matching are obtained at targeted frequency bands of proposed design. Keywords Multiband antenna · Reconfiguration · Slotted ground · Split ring resonator (SSR) · Vertex fed · Wireless standards
1 Introduction Recently, the research is significantly focused in development of multiband antenna with miniaturization and reconfigurability characteristics. Various antenna designs have been proposed addressing the wireless standards WLAN/WiMAX [1–4]. By incorporating the metamaterial element with multiband antenna achieving the improved radiation characteristics, appropriate gain, good impedance matching and miniaturization feature [5–9]. In literature many methods are mentioned such as metamaterial implementation [10–13], creating slots [11, 14], dielectric * Ritesh Kumar Saraswat [email protected] Mithilesh Kumar [email protected] 1
M.L.V. Govt. Textile and Engineering College, Bhilwara, Rajasthan, India
2
Rajasthan Technical University, Kota, Rajasthan, India
13
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R. K. Saraswat, M. Kumar
resonators [15], defective ground [12, 16–18] etc., to obtain the multiband nature within single design for wireless applications. Several antenna structures with slotted patch and ground formation have been established for different wireless standards (GPS/WLAN/WiMAX) [14, 16–19]. In [10], a metamaterial inspired multiband antenna is proposed for triple band operation for wireless standards. In [11–13], by execution of fractal approach and SRR geometry in antenna design attained the multiple resonant bands to cover the various wireless applications. In [15], a two element, Rectangular Dielectric Resonator antenna (RDRA) is implemented for multiband characteristics to cover the multiple wireless applications. In [2, 20], CPW feed triple band slot antennas are designed by inserting the S shaped radiator (attached wi
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