In this study, a co-planar waveguide (CPW) fed open split ring resonator (OSRR) antenna with defected ground structure (DGS) is proposed to achieve harmonics suppression. The proposed antenna consists of OSRR structure and two modified F-shaped DGS (MFDGS), which is responsible for miniaturization and wide-band stop characteristics respectively. From the results of measured reflection coefficient, we observe that the proposed antenna structure is able to suppress higher frequencies between 3 GHz and 8 GHz. Particularly in the second frequency, suppression is attained up to 19 dB. Further analysis shows, the peak gain and radiation pattern of proposed structure is suppressed up to 20 and 30 dB respectively at second harmonic frequency. © 2016 Wiley Periodicals, Inc.

Rajkumar Rajasekaran

Department of Analytics

School of Computer Science and Engineering

Vellore Campus

Usha Kiran Kommuri

Electronics

School of Electronics Engineering

Chennai Campus

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

&nbsp;

&nbsp;

VIT University

Microwave and Optical Technology Letters

In this paper, a triangular complementary split ring resonator (TCSRR) based compact metamaterial antenna for multiband operation is presented. TCSRR is used to achieve a compact antenna structure. The proposed antenna consists of a trapezoidal radiating patch with partial ground plane and loaded TCSRR. The trapezoidal radiating patch is responsible for lower and higher frequencies, wherein the two inner resonance frequencies are obtained by loading TCSRR structure. The negative permittivity characteristics of the TCSRR structure are demonstrated through waveguide setup method. The proposed antenna with compact size of 25 × 25 × 1.6 mm3 is developed and tested. The measured and simulated results are good in agreement with each other and it covers 2.4/5.2 GHz (WLAN), 2.5 GHz (WiMAX), 7.4 GHz (X-band downlink) and 8.2 GHz (ITU band) simultaneously. The proposed antenna design has good radiation pattern for both E-plane and H-plane in all the desired frequencies. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.

Wireless Personal Communications

A Triangular Complementary Split Ring Resonator Based Compact Metamaterial Antenna for Multiband Operation

IEEE Transactions on Antennas and Propagation

On the Fundamental Resonance of Slot Loop Antenna Inductively Fed by a Coplanar Waveguide

Controlling higher order modes up to third harmonic of the fundamental operating frequency in a microstrip line-fed patch antenna has been successfully demonstrated. Harmonic rejection in the antenna has been achieved at its feed level using highly compact design of defected ground structure (DGS). Rejection characteristics have been improved adding an open stub to the feed line. All possible higher order modes occurring in between the fundamental and the 3rd harmonic have been identified. Relative suppression of radiated fields with and without DGS-control has been quantitatively measured and effective control of harmonics has been experimentally ensured. The area occupied by the proposed DGS has been compared with earlier designs and over 40-90% reduction in size has been documented. © 2013 IEEE.

Control of higher harmonics and their radiations in microstrip antennas using compact defected ground structures

IEEE Antennas and Wireless Propagation Letters

A Novel Harmonic Suppressed Coplanar Waveguide (CPW)-Fed Slot Antenna

Electronics Letters

Compact CPW-fed ground defected H-shaped slot antenna with harmonic suppression and stable radiation characteristics

IEEE Microwave and Wireless Components Letters

Open Complementary Split Ring Resonators (OCSRRs) and Their Application to Wideband CPW Band Pass Filters

Study of harmonic suppression using defected ground structure for OSRR antenna

Journal	Data powered by TypesetMicrowave and Optical Technology Letters
Publisher	Data powered by TypesetWiley
ISSN	0895-2477
Open Access	0