Compact Multi-slotted Printed Antenna for Ultra-Wideband Applications in Medical Telemetry

Abstract

In this study, the two designs of the compact microstrip patch antennas, exhibiting ultra wideband characteristics are presented. The design offers an overall bandwidth of 4.7 and 5.2 GHz with a return loss of −35dB and −40 dB, respectively. The presented designs of the antennas are targeted for applications in medical telemetry. Geometrical optimizations for the slotted rectangular patch antenna loaded with notches are carried out to enhance the bandwidth over the ultra wideband. Unlike the conventional way, the microstrip patch antenna is optimized by considering an infinite substrate. The effect of finite substrate on the bandwidth of the microstrip patch is investigated leading to better results in terms of simplicity, compact size, and bandwidth. Also, it is perceived that the partial ground plane, which is incorporated, improves the antenna’s bandwidth drastically and also the reflection coefficient. The prototype of the two presented designs is formulated by creating notches with three slots naming it to be MPA1, and the other one without slots and with only notches naming it to be MPA2 for observing the relative effect of slots and the partial ground plane on the bandwidth. A very close agreement is confirmed between the simulated and the experimental values of the reflection coefficient and the bandwidth. The maximum percentage bandwidth of 85% is attained in the case of MPA2, while a maximum gain of 2.39 dBi is achieved for MPA1, which offers flexibility to manufacturers for use.

KEYWORDS:

• Bandwidth
• Reflection coefficient
• Truncated antenna
• Ultra wideband

DISCLOSURE STATEMENT

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

Additional information

Notes on contributors

Ranjan Mishra

Ranjan Mishra is working as an senior associate professor in the Department of Electrical and Electronics Engineering, in UPES, Dehradun, India. He received his PhD in microstrip antenna design from University of Petroleum and Energy Studies, Dehradun in the year 2016. He is the author of 30 Scopus indexed refereed and 8 SCIE journal papers. Email: [email protected]

Piyush Kuchhal

Piyush Kuchhal is working as a professor in the Department of Physics, UPES, Dehradun, India. He is the author of more than 65 research articles and 6 book chapters. He completed PhD from IIT Roorkee and is an active member of various professional societies. Email: [email protected]

Ankush Kapoor

Ankush Kapoor completed his PhD degree from UPES Dehradun, India. He has around 10 years of academic experience. He is working in Himachal Pradesh Government and currently posted at JNGEC, Sundernagar Distt. Mandi. He has authored 25 SCIE/SCOPUS indexed articles and is working in the field of Antennas and Microwaves. Corresponding author. Email: [email protected]