In this paper, an investigation is carried out on the effect of diagonal slit introduced on the rectangular patch antenna to obtain dual-band operation by simulating on High-Frequency Structure Simulator. Initially, a rectangular patch by microstrip line feeding technique is designed with the help of standard equations at the resonant frequency of 2.4 GHz. Later on, a slit of width 80 μm is introduced diagonally, with an inclination of 45° along the length of the patch and simulations has been carried out for different slit locations by varying along the width of the patch to study the effect of the slit on the antenna characteristics. The simulation result shows that the simple rectangular microstrip patch antenna resonates at a single frequency of 2.43 GHz with a return loss of −22.61 dB. With the introduction of the slit, the antenna shows a dual-band behavior with resonating frequencies lower than the simple rectangular patch antenna. The best dual-band performance is obtained with a return loss of −15.93 dB and −21.53 dB resonating at 1.88 GHz and 2.17 GHz, respectively.
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The authors are thankful to the Head of the Department of Electronics and Communication Technology Gauhati University for providing valuable suggestions and laboratory infrastructure during the work. One of the authors Dr. Pranjal Borah is also thankful to UGC, Govt. of India for providing financial support for the work under UGC D. S. Kothari Post Doctoral Fellowship (Grant No. F.4-2/2006(BSR)/EN/15-16/0036).
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Sarmah, T., Borah, P., Bezboruah, T. (2019). Design of a Dual-Band Rectangular Microstrip Patch Antenna with Diagonal Slit for Its Use in L- and S-Band Communications. In: Bera, R., Sarkar, S., Singh, O., Saikia, H. (eds) Advances in Communication, Devices and Networking. Lecture Notes in Electrical Engineering, vol 537. Springer, Singapore. https://doi.org/10.1007/978-981-13-3450-4_18
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