Metamaterial assisted hybrid response from frequency selective surface roll off and leaky wave resonator integrated antenna for underground applications
In emerging era of wireless technologies such as cognitive radio, wireless sensor networks etc., designing effective low frequency antennas < 1000 MHz and specifically < 700 remains a significant challenge due to its poor (often negative) gain and severely limited bandwidth (≈ 1%), despite exhibiting fair radiation profile. Therefore, challenges to design antennas suitable for above said applications have been taken up in the present investigation. Unlike, other metamaterial antenna, here, a unique approach is adopted by exploring frequency selective surface (FSS) filtering characteristics by employing simultaneous transmissive and reflective feature to achieve hybrid resonance. Additionally, an integrated leaky wave Fabry Perot type resonator is employed to produce additional distinct resonance. The proposed antenna yields resonances (˂700 MHz) with appreciable bandwidths and positive gains at 462.4 MHz (2.5%), 579 MHz (5.9%) and 663.5 MHz (1.9%) with 1.22, 3.5 and 4 dBi, as is confirmed by both the simulations and measurements.
The design of a dual-port antenna with decreased RCS and circular polarization is presented in this study. A cylindrical silicon dielectric resonator is excited via an asymmetrical plus-shaped aperture-coupling device to produce circularly polarized radiation (3.45-3.85 THz). An EBG metasurface integrated on the unders...
Dinesh Kumar Prabhakar, Lov Kumar, S. Sinha et al.· Applied Optics· 0 citations
In this letter, a single-layer shared-aperture Vivaldi-leaky-wave embedded antenna (V-LWEA) for coverage enhancement is presented. To mitigate the open-stopband effect and increase leakage rate in high-band (HB), periodic elliptical-slot unit cells are introduced, which facilitate single-port excitation without bulky a...
Yu-Chen Ma, Wei Zheng, Jun-Hong Wang et al.· IEEE Antennas and Wireless P...· 0 citations
A Compact millimetre-wave multiple-input multiple-output (MIMO) antenna is presented for next-generation 5G wireless communication. The antenna is designed on a Rogers RT/Duroid 5870 substrate having a thickness of 0.79 mm with a relative permittivity of about 2.33 and a low dielectric loss of nearly 0.0012 to obtain h...
This paper presents a comprehensive review of antennas based on substrate-integrated waveguide (SIW) technology employing dielectric resonator antennas (DRAs) for emerging fifth-generation and beyond wireless communication systems. The review systematically examines the operating principles, design methodologies, feedi...
Nida Nasir, M. H. Jamaluddin, Abinash Gaya et al.· Engineering Research Express· 0 citations
Background. Sub-terahertz communication systems demand compact, wideband, and highly efficient antennas to support high-data-rate transmission and sensing applications. Achieving such performance within a limited footprint remains a significant design challenge. Aim. This work aims to design a compact sub-THz antenna w...
Kulzum Begum, Amandeep Bharti, Sanoj Mahato et al.· Physics of Wave Processes an...· 0 citations
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