A Metamaterial Inspired ZOR Antenna Using IDC and Spiral Inductor with Partial Ground Plane for WLAN Application

In this article, an open-ended metamaterial antenna structure is designed for WLAN application. The antenna comprises of an interdigital capacitor (IDC) and spiral inductor with a partial ground plane. The IDC (shunt element) act as a varying parameter to control the zeroth-order resonance (ZOR) frequency, whereas spiral inductor (series element) is used to form a first negative order resonance frequency at 2.29 GHz. The ZOR mode has been excited at 4.53 GHz by employing complimentary right/left handed transmission line model in the structure and the first positive order resonance (FPOR) frequency is obtained at 4.9 GHz. A rectangular shaped stub has been used to act as a virtual ground for IDC. The proposed antenna design has total foot-print size of 0.29λ0 × 0.27λ0 × 0.024λ0. The fractional bandwidth of 20.41% (4.36–5.35 GHz) is achieved due to the merging of ZOR and FPOR mode respectively. In addition, it also exhibits a measured peak gain of 2.12 dB and 2 dB with a radiation efficiency of 77.76% and 87.62% at ZOR and FPOR frequencies respectively. A prototype of the proposed antenna structure has been fabricated and simulation results are experimentally rectified. A good agreement between simulation and measured results are obtained.

[1]  He-Xiu Xu,et al.  MULTIFREQUENCY MONOPOLE ANTENNAS BY LOADING METAMATERIAL TRANSMISSION LINES WITH DUAL-SHUNT BRANCH CIRCUIT , 2013 .

[2]  Bing-Zhong Wang,et al.  A Broadband and Electrically Small Planar Monopole Employing Metamaterial Transmission Line , 2015, IEEE Antennas and Wireless Propagation Letters.

[3]  Pei-Ling Chi,et al.  Compact and Bandwidth-Enhanced Zeroth-Order Resonant Antenna , 2015, IEEE Antennas and Wireless Propagation Letters.

[4]  Mehdi Veysi,et al.  Ungrounded composite right-/left-handed metamaterials: design, synthesis and applications , 2012 .

[5]  Tatsuo Itoh,et al.  Electromagnetic metamaterials : transmission line theory and microwave applications : the engineering approach , 2005 .

[6]  Dilip Kumar Choudhary,et al.  CPW fed miniaturized dual‐band short‐ended metamaterial antenna using modified split‐ring resonator for wireless application , 2017 .

[7]  He-Xiu Xu,et al.  Compact Fractal Left-Handed Structures for Improved Cross-Polarization Radiation Pattern , 2014, IEEE Transactions on Antennas and Propagation.

[8]  He-Xiu Xu,et al.  A metamaterial antenna with frequency-scanning omnidirectional radiation patterns , 2012 .

[9]  A. R. Attari,et al.  A Compact and Broadband Metamaterial-Inspired Antenna , 2013, IEEE Antennas and Wireless Propagation Letters.

[10]  Shyh-Jong Chung,et al.  Compact Multiband Antenna for Handsets With a Conducting Edge , 2015, IEEE Transactions on Antennas and Propagation.

[11]  Shao-Fang Zhang,et al.  Compact multiband monopole antenna for WLAN/WiMAX applications , 2014 .

[12]  He-Xiu Xu,et al.  Analysis and Design of Two-Dimensional Resonant-Type Composite Right/Left-Handed Transmission Lines With Compact Gain-Enhanced Resonant Antennas , 2013, IEEE Transactions on Antennas and Propagation.

[13]  T. Itoh,et al.  Transmission line approach of left-handed (LH) materials and microstrip implementation of an artificial LH transmission line , 2004, IEEE Transactions on Antennas and Propagation.

[14]  Bomson Lee,et al.  Metamaterial-based compact zeroth-order resonant antenna , 2009 .

[15]  Raghvendra Kumar Chaudhary,et al.  A Compact Zeroth-Order Resonating Wideband Antenna With Dual-Band Characteristics , 2015, IEEE Antennas and Wireless Propagation Letters.

[16]  Quan-Yuan Feng,et al.  Epsilon Negative Zeroth- and First-Order Resonant Antennas With Extended Bandwidth and High Efficiency , 2013, IEEE Transactions on Antennas and Propagation.

[17]  He-Xiu Xu,et al.  A MINIATURIZED TRIPLE-BAND METAMATERIAL ANTENNA WITH RADIATION PATTERN SELECTIVITY AND POLARIZATION DIVERSITY , 2013 .

[18]  Jeong Keun Ji,et al.  Bandwidth Enhancement of Metamaterial Antennas Based on Composite Right/Left-Handed Transmission Line , 2010, IEEE Antennas and Wireless Propagation Letters.

[19]  Raghvendra Kumar Chaudhary,et al.  A Compact Dual-Mode Metamaterial-Inspired Antenna Using Rectangular Type CSRR , 2015 .

[20]  A. Sanada,et al.  A planar zeroth-order resonator antenna using a left-handed transmission line , 2004, 34th European Microwave Conference, 2004..

[21]  Jiang Zhu,et al.  A Compact Transmission-Line Metamaterial Antenna With Extended Bandwidth , 2009, IEEE Antennas and Wireless Propagation Letters.

[22]  M. Popovic,et al.  Spectral Difference Between Microwave Radar and Microwave-Induced Thermoacoustic Signals , 2009, IEEE Antennas and Wireless Propagation Letters.

[23]  Li Yang,et al.  A Multi-Broadband Planar Antenna for GSM/ UMTS/LTE and WLAN/WiMAX Handsets , 2014, IEEE Transactions on Antennas and Propagation.

[24]  T. I. Yuk,et al.  A compact monopole antenna for WLAN applications , 2014 .

[25]  Q. Feng,et al.  Bandwidth Enhancement of CPW-Fed Antenna Based on Epsilon Negative Zeroth- and First-Order Resonators , 2013, IEEE Antennas and Wireless Propagation Letters.

[26]  R. Chaudhary,et al.  A Compact Coplanar Waveguide (CPW)-Fed Zeroth-Order Resonant Filter for Bandpass Applications , 2017 .

[27]  G. D. Alley.  Interdigital Capacitors and Their Application to Lumped-Element Microwave Integrated Circuits , 1970 .