https://orcid.org/0000-0002-2391-8856
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Abstract
Radiation from a Terahertz Photomixing Antenna (PMA) involves multi-physical phenomena. We introduce a simple analytical model that combines the multi-physical phenomena in the PMA using a conventional 2-ray model. We observe reasonably close agreement between the antenna output obtained from the proposed model and the available measured results. We extend our analytical framework to incorporate the presence of an additional signal source on one of the laser beams, intended towards producing modulation in the PMA output signal. We analytically investigate the active region current density and radiated fields of the PMA. We also present a brief discussion on the efficiency of the PMA and the different factors that impact the efficiency. The output power depends on some key parameters which can be utilized to make PMAs suitable for sensing as well as wireless communication applications.
ACKNOWLEDGEMENTS
Author 1 is grateful to Board of Research Innovation and Standards (BoRIS), IETE New Delhi for providing financial support (via Letter Ref.: IETE/J-282-17/BoRIS/2017-18) during the period of the above research work.
Disclosure statement
No potential conflict of interest was reported by the authors.
Additional information
Notes on contributors
Mrinmoy Bharadwaj
Mrinmoy Bharadwaj was born in Jorhat district, Assam, India. He has completed his BE degree from RTM Nagpur University, Maharashtra, India, in electronics and telecommunication engineering in 2010 and MTech degree in electronics design and technology from Tezpur University, Assam, India, in 2012. He received IETE PhD Research Fellowship 2017–2018 during the period from 10 December 2017 to 10 September 2018. Presently, he is pursuing degree of Doctor of Philosophy in the field of terahertz antennas and applications at Indian Institute of Technology Guwahati, Assam, India. His research interests include optoelectronic and THz antennas, graphene based antennas, EM Waves and wireless communications. Corresponding author. Email: [email protected]
Jitendra Prajapati
Jitendra Prajapati was born in Fatehpur, Uttar Pradesh, India. He has completed his Bachelor of Technology degree in electronics and communication engineering from UPTU, Lucknow. in 2010. From May 2011 to November 2012, he worked as a project fellow in Microwave Tube division at CSIR-CEERI, Pilani, on the development of plasma cathode electron gun (PCE-Gun). He received his PhD in the field of photoconductive antennas at the Department of Electronics and Electrical Engineering, Indian Institute of Technology Guwahati, Assam, India. in October 2018. He has served as an assistant professor with the Department of Electronics and Communication Engineering, National Institute of Technology Sikkim. Currently, he is serving as an assistant professor with the Department of Electrical Engineering, Shiv Nadar University, Greater Noida, UP, India. His research interests include photoconductive antennas, optoelectronics sources for THz radiation, THz sources Email: [email protected]
Ratnajit Bhattacharjee
Ratnajit Bhattacharjee received his BE in electronics and telecommunication engineering (First Class Hons) from Gauhati University (Institute: REC (at present NIT) Silchar), MTech (E and ECE Department, Microwave Engineering specialization) from IIT Kharagpur and PhD (Engineering) from Jadavpur University, Kolkata. Presently, he is a professor in the Department of Electronics and Electrical Engineering, IIT Guwahati. Prior to joining IIT Guwahati in 2002, he was a faculty member in REC (NIT) Silchar. His research interest includes wireless communication, wireless networks, microstrip antennas, microwave engineering and electromagnetics. Twelve research students have completed their PhD under his supervision and at present several students are working under his guidance. He has co-authored about 140 research papers in journals, international and national conferences. He has served as General Chair for fifth edition of IEEE Applied Electromagnetic Conference, AEMC 2015, and 22nd National Conference on Communications, NCC 2016, Chairman for the NPSC 2014 and Convener for IESC 2017. He has delivered invited talks in several conferences, workshops and symposia. He has also served as TPC member for several conferences. He has developed a web course on Electromagnetic Theory under the NPTEL project of MHRD, India, and also involved with the on-going mission project on Virtual Labs as coordinator of EE discipline laboratories and Institute coordinator for IIT Guwahati. He was a co-investigator for the contracted research from NICT Japan in the area of next-generation wireless networks and PI for a project from ISRO, India, in the area of development of matched feed for offset reflector antennas. Currently, he is chief coordinator for a Ministry of Electronics and Information Technology (MeitY) India sponsored project for setting up of an Electronics & ICT academy at IIT Guwahati. He is a member of IEEE and life member of Indian Society of Technical Education. Email: [email protected]
