Modal analysis of a half-mode substrate integrated waveguide-fed slot-coupled dual-band patch antenna

Abstract

This manuscript presents comprehensive modal analysis of a compact, half-mode SIW-fed slot-coupled dual-band antenna. The Characteristic Mode Analysis (CMA) is investigated in detail and presented for the first time to analyze the radiation behavior and frequency domain characteristics of the proposed structure. The number of dominant operative modes supported by the antenna is decided based on the number eigen factors, its corresponding values, and the characteristic angles. The antenna operates at 33 and 38.14 GHz with a return loss of 20.5 and 19.5 dB, a gain of 7.9 and 6.7 dBi, and an efficiency of 90% and 88%, respectively. Measured results are in close resemblance with the CMA, considering the difference between the conventional cavity modes and the characteristic modes of the proposed planar cavity configuration. The methodology can be extended to characterize any arbitrary shape radiating geometry.

KEYWORDS:

• Half mode substrate integrated waveguide (HMSIW)
• slot antenna
• Mm-wave
• Characteristic Mode Analysis (CMA)

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Rakesh Kumar Chandan

Rakesh Kumar Chandan was born in Bihar, India, in 1988. He received a BE degree in Electronics and Communication Engineering from Bhabha Engineering Research Institute, Bhopal, India, in 2010 and an MTech degree in Digital Communication from RGTU, Bhopal, India, in 2014. Currently, as a research scholar, he is pursuing a PhD from Birla Institute of Technology, Mesra, India, in the field of Antennas & Wave Propagation. His current research focuses on microwave-millimeter-wave components, 5G antennas, and antenna array design.

Srikanta Pal

Srikanta Pal was born on December 2, 1967, in West Bengal, India. He received the BTech degree in ECE from the NIT Warangal, India in 1990, ME degree in microwave engineering from Jadavpur University, Kolkata, India in 1992, and the DPhil degree in engineering science from Oxford University, UK, in 2003. He was an executive engineer and later on a senior engineer with the Research and Development Antenna, Microwave Test, and Measurements Laboratory, Bharat Electronics Limited (1992-2000). He was a research assistant with the Department of Engineering Science, Oxford University (2001-2003). He is currently working as a professor in ECE department at BIT, Mesra, Ranchi, India. His current interests include microwave-millimeter-wave components using advanced materials and technologies.