A wideband omnidirectional planar filtenna for 5 GHz WLAN application

Abstract

This paper presents a wideband planar filtenna based on the filter synthesis technique. The proposed filtenna consists of a third order hairpin line resonator filter coupled with an elliptical antenna. One arm of the last resonator of hairpin line resonator along with the extended feed arm of an antenna constitute an admittance inverter, which provides better integration between filter and antenna. The measured results show that the proposed filtenna exhibits a filtering response with impedance bandwidth of 26.5% (4.19–5.47 GHz), flat passband gain, good selectivity at band edges and omnidirectional radiation pattern well suited for WLAN application.

KEYWORDS:

• Planar filtenna
• synthesis technique
• hairpin line resonator
• elliptical antenna
• admittance inverter

Disclosure statement

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

Additional information

Notes on contributors

Pravesh Pal

Mr Pravesh Pal was born in Korba, Chhattisgarh, India in 1986. He received B.E. degree in Electronics and Telecommunication Engineering from CSVTU, Bhilai, India, in 2009, and MTech in Electronics & Communication Engineering from BIT Mesra, Ranchi, Jharkhand, India in 2012 and pursuing PhD in Electronics & Communication Engineering from National Institute of Technology, Jamshedpur, India. His current research interest includes microwave and millimeter wave antenna, filtering circuits and power dividers.

Rashmi Sinha

Dr Rashmi Sinha was born in Ranchi, Jharkhand, India in 1972. She received the BSc (Engineering) degree in Electrical Engineering and MSc (Engineering) degree in Power Electronics in the year 1995 and 2003, respectively, from National Institute of Technology, Jamshedpur, India. She received her PhD from National Institute of Technology, Jamshedpur. She joined National Institute of Technology, Jamshedpur as Lecturer in 1997. Presently, she is an Associate Professor in the same institute. Her area of interest includes antenna design, array synthesis, microwave, metamaterial, and soft computing. Dr Sinha has published 2 books, 4 book chapter, 10 paper in international conference and 13 research articles in Journal of repute. She has more than 22 years of teaching experience.

Santosh Kumar Mahto

Dr Santosh Kumar Mahto was born in Patna, India in 1985. He received the BTech degree in Electronics & Communication Engineering from National Institute of Science & Technology, Berhampur, India, in 2010, and the ME in wireless communication from BIT Mesra, Ranchi, India in 2012 and PhD in Microwave Engineering from National Institute of Technology, Jamshedpur, India in 2017. In 2017, he joined Department of Electronics & Communication Engineering, Indian Institute of Information Technology, Ranchi, as a faculty. His current research interest includes microwave and millimeter wave antenna, array synthesis, soft computing, and electromagnetic wave absorbers. Dr Mahto received International Travel Support grant from DST Govt. of India and MHRD Govt. of India scholarship receiving during his MTech & PhD programs. Dr Mahto has published 2 books, 4 book chapter, 10 paper in international conference, and 14 research articles in Journal of repute. He has more than 3 years of teaching experience.