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Bandwidth Enhancement of Square Microstrip Antennas Using Dual Feed Line Techniques

Syah Alam1, Indra Surjati1, and Teguh Firmansyah2
1. Department of Electrical Engineering, Universitas Trisakti, DKI Jakarta, Indonesia
2. Department of Electrical Engineering, Universitas Sultan Ageng Tirtayasa, Banten, Indonesia

Abstract—This study proposes a new design of wide bandwidth microstrip antennas using dual feed line techniques. To obtain the optimal impedance bandwidth (IBW) and Axial Ratio Bandwidth (ARBW), several iterations were performed by controlling the dimensions and length of the dual feed line. From the simulation results, the proposed antenna obtained IBW of 0.4GHz or 17% and ARBW of 0.38GHz or 15% at an operating frequency of 2.5 GHz. The gain of the proposed antenna was 5.73dB with a directional radiation pattern. The dual feedline technique successfully improved IBW up to 254.16% compared with the single feed technique. This study would be useful especially for bandwidth optimization of microstrip antennas.
 
Index Terms—Square patch, dual-feed line, circular polarization, bandwidth

Cite: Syah Alam, Indra Surjati, and Teguh Firmansyah, "Bandwidth Enhancement of Square Microstrip Antennas Using Dual Feed Line Techniques," International Journal of Electrical and Electronic Engineering & Telecommunications