Printed Monopole Antenna Using Inductive Stub and Defected Ground Structure
K. Kumar, Department of Electronics and Communication Engineering, College, Puducherry, India.
Manuscript received on March 06, 2015. | Revised Manuscript received on March 18, 2015. | Manuscript published on April 30, 2015. | PP: 28-31 | Volume-4 Issue-4, April 2015. | Retrieval Number: D3828044415/2013©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: A new type of triple band antenna is proposed for wireless applications. The proposed structure printed on FR4 substrate with εr = 4.3, h = 1.6 mm and tan δ = 0.008. The size of the radiating element is 11.2 x 6.0 mm2 . Both the triple band antenna and the feeding microstrip line are printed on the same substrate, leading to a fully planar structure. The Defected Ground Structure is employed to enhance the bandwidth. The measured -10 dB return loss impedance bandwidth for the first band is about 4.0 – 4.5 GHz (11.76%) with a resonance mode excited at 4.2 GHz, for the second band is about 5.2 – 5.8 GHz (10.90%) with a resonance mode excited at 5.9 GHz and for the third band is about 6.2 – 7 GHz (12.12%) with a resonance mode excited at 6.5 GHz. The performances of the antenna with optimized parameters are characterized in terms of reflection coefficient, gain, and radiation pattern.
Keywords: Monopole antenna, Bandwidth, Radiation pattern, Return loss.