Capacitive Coupled Frequency Independent Dielectric Resonator Antenna Array for X-Band Applications

Abstract

A capacitive coupled Dielectric Resonator Antenna (DRA) array based on log periodic technique is investigated experimentally for X-band applications. The Frequency Independent DRA array consists of seven rectangular Dielectric Resonators (DRs). The DRA array has been excited by a series fed microstrip line. Since the resonators are directly coupled to the feed line, it results in more compact and lower loss DRA array. The proposed DRA array has been designed and realized. The measured results are in good agreement with the simulations. The designed array is operating over the frequency range 6.2–12.2 GHz for 2:1 VSWR with the fractional bandwidth 65.2%. The array provides a peak gain of 9.09 dBi with the broadside radiation pattern over the widespread operating band. The proposed design is useful for X-band applications.

KEYWORDS:

• Bandwidth
• Capacitive coupled
• Dielectric resonator antenna
• Frequency independent
• Microstrip line
• X-band

Additional information

Notes on contributors

Runa Kumari

Runa Kumari received the BE and M tech degrees from Biju Patnaik University of Technology, Odisha, India in the year 2003 and 2008, respectively and PhD degree from National Institute of Technology, Rourkela, India in the year 2014. She is presently working as an assistant professor at the Department of Electrical and Electronics Engineering, Birla Institute of Technology & Science, Pilani, Hyderabad campus. Her current research interest includes log periodic antenna, dielectric resonator antenna, planar antenna, reconfigurable planar antennas and metamaterial. Dr Kumari is a member of IEEE. Corresponding author. Email: [email protected]

Santanu Kumar Behera

Santanu Kumar Behera received the BSc (Engg) degree from VSSUT Burla, Sambalpur in the year 1990, ME and PhD (Engg) degrees from Jadavpur University in the year 2001 and 2008, respectively. He is presently working as an associate professor at the Department of Electronics and Communication Engineering, National Institute of Technology Rourkela, India. His current research interest includes bio-electromagnetics, planar antennas, dielectric resonator antennas, and reconfigurable planar antennas. Dr Behera is a Fellow of IETE (India), Fellow of the Institution of Engineers (India), and a senior member of the IEEE. He worked as a visiting faculty at Department of Telecommunications & ICT, Asian Institute of Technology Bangkok, Thailand in August 2017 semester. Email: [email protected]