Application of Defected Ground Structure to Suppress Out-of-Band Harmonics for WLAN Microstrip Antenna

An application of defected ground structure (DGS) to reduce out-of-band harmonics has been presented. A compact, proximity feed fractal slotted microstrip antenna for wireless local area network (WLAN) applications has been designed. The proposed 3rd iteration reduces antenna size by as compared to rectangular conventional antenna and by introducing H shape DGS, the size of an antenna is further reduced by . The DGS introduces stop band characteristics and suppresses higher harmonics, which are out of the band generated by 1st, 2nd, and 3rd iterations. H shape DGS is etched below the 50 Ω feed line and transmission coefficient parameters are obtained by CST Microwave Studio software. The values of equivalent and model have been extracted using a trial version of the diplexer filter design software. The stop band characteristic of the equivalent model also has been simulated by the Advance Digital System software, which gives almost the same response as compared to the simulation of CST Microwave Studio V. 12. The proposed antenna operates from 2.4 GHz to 2.49 GHz, which covers WLAN band and has a gain of 4.46 dB at 2.45 GHz resonance frequency.

[1]  Jwo-Shiun Sun,et al.  Harmonic suppression by photonic bandgap on CPW‐fed loop‐slot antenna , 2004 .

[2]  Junfa Mao,et al.  Harmonic suppression with photonic bandgap and defected ground structure for a microstrip patch antenna , 2005, IEEE Microwave and Wireless Components Letters.

[3]  Design and characterization of an efficient multi-layered circularly polarized microstrip antenna , 2015, International Journal of Microwave and Wireless Technologies.

[4]  Atefeh Kordzadeh,et al.  A NEW REDUCED SIZE MICROSTRIP PATCH ANTENNA WITH FRACTAL SHAPED DEFECTS , 2009 .

[5]  W. Marsden.  I and J , 2012 .

[6]  D. Guha,et al.  Concentric Ring-Shaped Defected Ground Structures for Microstrip Applications , 2006, IEEE Antennas and Wireless Propagation Letters.

[7]  R. Chair,et al.  Miniature wide-band half U-slot and half E-shaped patch antennas , 2005, IEEE Transactions on Antennas and Propagation.

[8]  Cyrus Shafai,et al.  Filter-Antenna Module Using Substrate Integrated Waveguide Cavities , 2011, IEEE Antennas and Wireless Propagation Letters.

[9]  W. Y. Sam,et al.  Design of integrated rectangular SIW filter and microstrip patch antenna , 2012, 2012 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE).

[10]  Jong-Sik Lim,et al.  Application of defected ground structure in reducing the size of amplifiers , 2002 .

[11]  Ashwini Kumar Arya,et al.  Defected Ground Structure in the perspective of Microstrip Antennas: A Review , 2010 .

[12]  Jun-Fa Mao,et al.  Harmonic suppression with photonic bandgap and defected ground structure for a microstrip patch antenna , 2005 .

[13]  Constantine A. Balanis,et al.  Antenna Theory: Analysis and Design , 1982 .

[14]  Yasushi Horii,et al.  Harmonic control by photonic bandgap on microstrip patch antenna , 1999 .

[15]  Quan Xue,et al.  Circularly Polarized Shorted Patch Antenna on High Permittivity Substrate With Wideband , 2012, IEEE Transactions on Antennas and Propagation.

[16]  Magdy F. Iskander,et al.  Multiband and miniaturized inset feed microstrip patch antenna using multiple spiral-shaped defect ground structure (DGS) , 2009, 2009 IEEE Antennas and Propagation Society International Symposium.

[17]  A. Omar,et al.  An improvement of defected ground structure lowpass/bandpass filters using H-slot resonators and coupling matrix method , 2011 .

[18]  Susanta Kumar Parui,et al.  Modeling of Modified Split-Ring Type Defected Ground Structure and Its Application as Bandstop Filter , 2009 .

[19]  S. Sanyal,et al.  A novel defected ground structure for planar circuits , 2006, IEEE Microwave and Wireless Components Letters.

[20]  D. Guha,et al.  Improved Cross-Polarization Characteristics of Circular Microstrip Antenna Employing Arc-Shaped Defected Ground Structure (DGS) , 2009, IEEE Antennas and Wireless Propagation Letters.

[21]  Wen Tao Li,et al.  Novel Planar UWB Monopole Antenna With Triple Band-Notched Characteristics , 2009, IEEE Antennas and Wireless Propagation Letters.

[22]  M. R. Lohokare,et al.  Bandwidth Enhancement and Size Reduction of Microstrip Patch Antenna by Magnetoinductive Waveguide Loading , 2011, Wirel. Eng. Technol..