Multi-band Dual Polarized Variations of Modified Circular Microstrip Antennas

Abstract

Multi-band microstrip antennas have been commonly realized by using techniques of stub or slot. In these designs, knowledge about correct positioning of stub or slot and their effects on patch resonant modes in terms of their frequency and impedance variation is needed. In this paper, with reference to a variation of slot cut circular microstrip antenna, a detailed study that provides an insight into functioning of multi-band dual polarized antenna is presented. The slots degenerate patch first two resonant modes into dual orthogonal modes to give multiple frequency response with dual polarization. The resonant length formulations at modified degenerated circular patch modes are presented. The frequencies calculated using them match closely with the simulated frequencies. For gain enhancement, air suspended design of slot cut antenna is presented which gives broadside gain of 1.5 to 6 dBi across multiple frequencies. Thus, the present work explains the functioning of multi-band antenna in terms of patch modes and will serve as a tutorial for analyzing similar multi-band dual polarized configurations.

Keywords:

• Circular microstrip antenna
• Circular slot
• Dual polarization
• Multi-band microstrip antenna
• Rectangular slot
• Resonant length formulation

Additional information

Notes on contributors

Amit A. Deshmukh

Amit A Deshmukh obtained BE (Electronics) from VIT, Pune University in 1997. He obtained MTech in 2000 and PhD in 2004 from Department of Electrical Engineering, IIT Bombay. His thesis work during masters and doctoral was on compact broadband and dual band microstrip antennas. Currently, he is working as a professor and the Head of the Department of Electronics and Telecommunication Engineering at D J Sanghvi College of Engineering, Vile – Parle (W), Mumbai, India. He has more than 17 years of experience (Teaching, Industry, and Research). Corresponding author. Email: [email protected], [email protected]

Priyanka Verma

Priyanka Verma obtained BE in electronics and communication engineering from the SNDT University, Mumbai and ME in electronics and communication engineering from D J Sanghvi College of Engineering, the University of Mumbai. Her master's project was on the design of multiband microstrip antennas. She has one year of teaching experience as an assistant professor in the University of Mumbai. Email: [email protected]