Compact Zigzag-Shaped-Slit Microstrip Antenna With Circular Defected Ground Structure for Wireless Applications

Author

Reddy, B. R. Sanjeeva ; Vakula, D.

Author_Institution

Nat. Inst. of Technol., Warangal, India

Volume

14

fYear

2015

fDate

2015

Firstpage

678

Lastpage

681

Abstract

In this letter, a compact zigzag-shaped-slit rectangular microstrip patch antenna with circular defected ground structure (DGS) is designed for wireless applications. The probe-fed antenna consisting of a zigzag-shaped slit, dual T-shaped slits on either sides of a rectangular patch, and circular dumbbell-shaped defected ground plane is optimized. The antenna was able to generate three separate resonances to cover both the 2.45/5.28-GHz WLAN bands and the 3.5-GHz WiMAX bands while maintaining a small overall size of 40 ×28 ×3.175 mm³. The return-loss impedance bandwidth values are enhanced significantly for three resonant frequencies. The designed antenna is characterized with better radiation patterns and potentially stable gain around 4-6 dBi over the working bands. Good agreement was obtained between measurements and simulations.

Keywords

WiMax; antenna radiation patterns; defected ground structures; microstrip antennas; microwave antennas; wireless LAN; WLAN bands; WiMAX bands; circular defected ground structure; compact zigzag-shaped-slit patch antenna; defected ground plane; dual T-shaped slits; frequency 2.45 GHz; frequency 3.5 GHz; frequency 5.28 GHz; probe-fed antenna; radiation patterns; rectangular microstrip patch antenna; return-loss impedance bandwidth value; size 28 mm; size 3.175 mm; size 40 mm; wireless application; Antenna measurements; Bandwidth; Microstrip; Microstrip antennas; Patch antennas; Resonant frequency; Defected ground structure; impedance bandwidth; radiation pattern; zigzag slit;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2014.2376984

Filename

6975039