In this letter, a compact ultrawide stop-band frequency selective surface (FSS) with polarization-insensitive and higher level of angular stability property is presented. It consists of a very simple modified square-ring unit cell that exhibits excellent wideband rejection over the entire ultrawideband (UWB) 2.72-13 GHz range. For TE incident wave, the &lt;-20 dB bandwidth is 67.41% (5.01-10.1 GHz), which is 18.38% more compared to the simple square-ring-type FSS. This structure with the smallest unit cell dimension (0.066λ0 × 0.066λ0 × 0.013λ0) compared to the earlier reported UWB FSSs is printed on a single-layer single-sided FR4 substrate. The design is flexible enough to tune the desired resonant frequency and the operating band by changing the length and width of the resonators. The design concept has been validated through proper measurement. This FSS can be used as a good reflector to enhance the gain of UWB antennas. © 2002-2011 IEEE.

KAUSHIK MANDAL

Radio Physics and Electronics

G S PAUL

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

Polarization-Insensitive and Angularly Stable Compact Ultrawide Stop-Band Frequency Selective Surface

IEEE Antennas and Wireless Propagation Letters

Here, an ultra-wide stop-band single-layer frequency-selective surface (FSS) with high-incidence angle independence has been proposed to enhance the gain of an ultra-wideband (UWB) monopole antenna. The unit cell (0.2 lambda x 0.2 lambda) of the proposed FSS consists of four asymmetric rectangular patches with circular slots embedded in it. This concept of four slotted patches is conceived to achieve ultra-wide stop-band characteristic over 4.7-14.9 GHz. An equivalent lumped circuit model for the FSS is proposed to provide insight into the working nature of the FSS. A UWB monopole antenna is also designed and integrated with the proposed FSS. Ultra-wide stop-band single-layer FSS converts the omnidirectional pattern of the monopole antenna into a unidirectional one and thereby registers a significant increase in its gain by 4.5 dBi. The design concept has been discussed and experimentally verified using simulated and measured results.

Fulltext

IET Microwaves, Antennas and Propagation

Modelling of ultra-wide stop-band frequency-selective surface to enhance the gain of a UWB antenna

Microwave and Optical Technology Letters

Gain augmentation of a CPW fed printed miniature UWB antenna using frequency selective surface

Journal of Microwaves, Optoelectronics and Electromagnetic Applications

Polarization Insensitive Compact Wide Stop-band Frequency Selective Surface

IET Microwaves, Antennas & Propagation

Novel angular-independent higher order band-stop frequency selective surface for X-band applications

International Journal of Microwave and Wireless Technologies

Polarization-independent single-layer ultra-wideband frequency-selective surface

Polarization-insensitive and angularly stable compact ultrawide stop-band frequency selective surface

Journal	Data powered by TypesetIEEE Antennas and Wireless Propagation Letters
Publisher	Data powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
ISSN	1536-1225
Open Access	No