Analysis of Slot Cut Broadband and Dual-band Rectangular Microstrip Antennas

Abstract

The broadband and dual-band rectangular microstrip antenna is realized by cutting pair of toothbrush-shaped or step slots along the non-radiating edges of the patch. The toothbrush-shaped slot is said to introduce TM_d0 mode in between the TM₁₀ and TM₂₀ modes of the rectangular patch and realizes broadband response. In step slot cut configuration, the slot introduces a mode near the TM₁₀ mode resonance frequency of the patch and realizes dual frequencies. In this paper, a detail analysis to study the effect of slots on the broadband and dual-band response in these rectangular microstrip antennas (RMSAs) is presented. It was observed that the slot does not introduce any mode but modifies the resonance frequency of higher order orthogonal mode and realizes broadband and dual-band response. The slot alters the direction of surface currents at higher order mode and gives similar radiation pattern characteristics over the broader bandwidth and at the dual frequencies. In broadband RMSA, a formulation of resonant length at modified TM₀₂ mode is proposed. The frequency calculated using the same closely agrees with the simulated result.

Keywords:

• Broadband microstrip antenna
• Dual-band microstrip antenna
• Rectangular microstrip antenna
• Step slot
• Toothbrush-shaped slot

Additional information

Notes on contributors

Amit A. Deshmukh

Amit A. Deshmukh obtained B.E. in Electronics from V.I.T. Pune University in 1997. He obtained M.Tech. degree in 2000 and Ph. D. in 2004 from Department of Electrical Engineering, I. I. T. Bombay. His thesis work during masters and doctoral was on microstrip antennas. Currently he is working as Professor and Head of EXTC Department at D. J. Sanghvi College of Engineering, Mumbai. He has published more than 100 research papers in various International and National Journals and Conferences. E-mail: [email protected]

A. A. Kadam

A. A. Kadam received B.E (Electronics and Telecommunication) from V.C.E.T, University of Mumbai in 2003. He obtained M.E. (Electronics and Telecommunication) from V.E.S.I.T, University of Mumbai in 2009. Currently he is working as Assistant Professor in EXTC Department of D. J. Sanghvi College of Engineering, Mumbai E-mail: [email protected]

K. P. Ray

K. P. Ray received M. Tech. in microwave electronics from University of Delhi, South Campus, Delhi, India, in 1985. He joined SAMEER in Mumbai, India, in the same year and has been working on the design of different types of antenna elements and arrays, the high-power generation of RF and microwaves, and other microwave components and systems. He received a Ph.D. from the electrical engineering department of IIT in Bombay, India, in 1999; his thesis was in the field of MSAs. He has been a visiting faculty member at IIT in Bombay, and has been deputed to GTRI in Atlanta, Georgia, under the UNDP program. He has published more than 150 research papers in journals and conference proceedings. E-mail: [email protected]