U-Slot Loaded Broadband Rectangular Microstrip Antenna
Rajesh Kumar Verma1, P. K. Singhal2
1Rajesh Kumar Verma, Deptt. of Electronics & Comm. Engg, I.E.T. Bundelkhand University, Jhansi (UP), India.
2Prof. P. K. Singhal, Deptt. of  Electronics & Comm. Engg, M.I.T.S. Gwalior (MP), India.
Manuscript received on March 20, 2013. | Revised Manuscript received on April 11, 2013. | Manuscript published on April 30, 2013. | PP: 538-540 | Volume-2, Issue-4, April 2013. | Retrieval Number: D1528042413/2013©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: To enhance the bandwidth, a new design of rectangular microstrip antenna is presented. The proposed geometry consists of an E – shaped ground plane structure, a truncated radiating patch layer and a U- slot loaded patch layer. The radiating patch layer and U slot loaded patch layer are separated using a thick air substrate (10 mm) to enhance the bandwidth. The two major impedance BWs determined are 40 % at centre frequency 3815 MHz and 29 % at centre frequency 5995 M Hz. The microstrip antenna is fed by a coaxial probe. The proposed geometry provides a band of 1530 MHz (3.05 GHz to 4.58 GHz) and of 1750 MHz (5.12 GHz to 6.87 GHz) that is suitable for certain frequencies of S band as well as of C band applications. Also, the proposed geometry provides a peak directivity 6.59 d Bi, gain 4.78 d Bi, axial ratio 42.46 dB, aperture efficiency 85.7 %, radiation efficiency 89 % for a band (3.05 GHz to 4.58 GHz) whereas for a band of (5.12 GHz to 6.87 GHz) the proposed geometry provides a peak directivity 6.22 d Bi, gain 4.32 d Bi, axial ratio 70.9 dB, aperture efficiency 68.8 %, radiation efficiency 70 %. All the simulations are carried out using Zeland IE3D simulation software for a dielectric substrate with dielectric constant 4.4 and loss tangent 0.02.
Keywords: Broadband, RMSA, Truncated.