Design of Frequency and Polarization Agile Patch Antenna for Wireless Communications

Abstract

In this paper, a compact frequency and polarization agile patch antenna is presented. The antenna comprises a square patch with truncated corners along with a triangular slot etched at the center of the patch. Pin diodes are used to bridge the gap between the truncated corners and center triangular region with a radiating square patch. By appropriately biasing the pin diodes the antenna achieves frequency and polarization diversity. The antenna achieves five distinct states with three linear polarization (LP) states operating at three different frequencies and two circular polarization (LHCP/RHCP) states operating at the same frequency. The antenna gives a −10 dB impedance bandwidth of 95 MHz (1.825–1.92 GHz) in the GSM band for LP state 1, 115 MHz (2.365–2.48 GHz) in the ISM band for LP state 2, 145 MHz (2.08–2.225 GHz) in UMTS band for LP state 3, 100 MHz (2.1–2.2 GHz) UMTS band for CP state 4 and 5. The antenna attains a measured peak gain of ∼4.8 dBi at LP states and ∼4.54 dBi at CP states in its operating band.

KEYWORDS:

• Multi-frequency antennas
• Patch antenna
• Radiation Patterns
• Reconfigurable antennas

Additional information

Notes on contributors

A. Priya

Anumuthu Priya completed her BTech degree with distinction in electronics & communication engineering (ECE) from Periyar University, Tamilnadu in 2002 and ME in communication systems with distinction from Anna University, India in 2010. She is pursuing her PhD in Dept of ECE, B S Abdur Rahman University, Tamilnadu. She is presently working as an assistant professor in ECE Dept, B S Abdur Rahman Crescent Institute of Science and Technology, Tamilnadu, India. She has over 14 years of teaching experience. Her research interests include antenna theory, reconfigurable antennas, radar systems,microwave and RF circuits, ultra-wideband (UWB) antennas.

S. Kaja Mohideen

S Kaja Mohideen received his bachelor of engineering degree in electronics and communication engineering from Thiagarajar College of Engineering, Madurai, in the year 1988. He did his masters inME applied electronics atCoimbatore Institute of Technology, Coimbatore, in the year 1991. He received his PhD degree from AnnaUniversity, Chennai in 2008 for his research in the area of VLSI design. He has over 27 years of teaching experience in B S Abdur Rahman Crescent Institute of Science and Technology. His area of interest includes VLSI, microcontroller-based system designs, antenna design, digital system design and image processing. He is having 30 publications in international journals and more than 25 publications in national/ international conferences to his credit. Email: [email protected]