A shaped cylindrical dielectric resonator antenna (CDRA) has been investigated for the first time with a view to improving its radiation characteristics. The CDRA is fed by a microstrip line. The shaping is done by introducing a central hole protruded through the bottom of the DRA. This helps in mode filtering and thus by reducing cross-polarized fields without causing any deterioration in the principal plane radiations. Isolation between co-to-cross-polarized fields increases from 26 dB (for conventional geometry) to 42 dB (for proposed configuration) using a commercially available material with ε<inf>r</inf> = 10. © 2014 IEEE.

DEBATOSH GUHA

Radio Physics and Electronics

H R GAJERA

C KUMAR

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Strip-fed shaped dielectric resonator antenna for improved radiation characteristics through mode filtering

IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)

An investigation into the modal fields of a cylindrical dielectric resonator antenna (CDRA) under different forms of metallic perturbations has been presented. It is shown that, properly designed 'perturbation' may help as mode-filter and in reality to control unwanted radiations from a practical antenna. CDRA with metallic perturbation shows broadside radiation with about 6 dBi peak gain and low cross-polarized fields. Promise for achieving over 40 dB isolation between co to cross-polarized fields has been documented. © 2013 IEEE.

Dielectric resonator antenna with metallic perturbation: Investigation into modal fields and new radiation properties

A defected ground structure (DGS) is proposed to reduce the cross-polarized (XP) radiation of a microstrip patch antenna. The proposed DGS pattern is simple and easy to etch on a commercial microstrip substrate. This will only reduce the XP radiation field without affecting the dominant mode input impedance and co-polarized radiation patterns of a conventional antenna. The new concept has been examined and verified experimentally for a particular DGS pattern employing a circular patch as the radiator. Both simulation and experimental results are presented. © 2005 IEEE.

Journal	Data powered by TypesetIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
Publisher	Data powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
ISSN	1522-3965
Open Access	No