UWB Dual-Band Notched Conical Dielectric Resonator Antenna with Improved Gain

ABSTRACT

A dual-band notched ultra wideband (UWB) conical dielectric resonator antenna (DRA) is proposed. A circular patch with cross slot on the substrate and slotted partial ground plane is realized to achieve wide impedance bandwidth. Further, the inverted conical dielectric resonator is placed on the cross slot to achieve high gain as well as more wide impedance bandwidth from 1.7 GHz to 13.5 GHz. The entire band is useful with two filtered bands at 3.3 GHz and 5.5 GHz by the creation of notches. The Wi-MAX band (3.3–3.75 GHz) is filtered with spiral defected microstrip structure on the microstrip feed and the wireless local area network (WLAN) band (5.2–5.6 GHz) is filtered with etching rectangular split ring resonator on the circular patch. The far-field gain with the circular patch is considerably increased by the conical DRA loading, which is around 6 dBi except at the notched bands and the simulated radiated efficiency was varying from 75% to 93%. The proposed antenna size is 60 × 60 × 10 mm³. The antenna is simulated and optimized for the dimensions on the FEM-based ANSYS HFSS platform. The simulated results agree well with the measurement result.

KEYWORDS:

• Band notched
• Conical DRA
• UWB antenna

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

Upali Aparajita Dash

Upali Aparajita Dash was born in Odisha, India in 1980. She received her B.tech and M.Tech in Electronics and Telecommunication Engineering from BijuPattanaik Technical University and KIIT Deemed to be University, Bhubaneswar, Odisha, India in the year 2003 and 2010, respectively. Currently she is pursuing her PhD degree at the School of Electronics Engineering, KIIT Deemed to be University, Bhubaneswar, India. Her current research interests include design of dielectric resonator antenna for multiband analysis, notch creation, wideband circular polarization, enhancement of gain using. Email: [email protected]

Sudhakar Sahu

Sudhakar Sahu is presently working as Professor, School of Electronics Engineering, KIIT Deemed to be University, Bhubaneswar, Odisha, India. He received the ME degree in Electronics & Telecommunication Engineering from Indian Institute of Engineering Science & Technology (IIEST) Shibpur, West Bengal, and PhD (Engineering) degree in Electronics & Telecommunication Engineering from Jadavpur University, Kolkata. He is the author and co-author of 60 articles in International Journals & Conference Proceedings. He has supervised four doctoral theses. He has successfully completed two Government of India-funded projects: one is AICTE, New Delhi and another BRNS-DAE, Mumbai. His research interests and activities include Dielectric Resonator-based MIMO Antenna for Cognitive Radios, UWB Antenna, Microstrip Filters, Metamaterial/Metasurface-based microwave components and application of Soft Computing Techniques in Engineering. He is a Senior Member of IEEE AP/MTT Society, Fellow of IE (India), Member of IET (UK) and Life Member of ISTE (New Delhi).