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substrate-integrated-waveguide-technologies
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Dirac leaky wave antenna for millimetre-wave applications
, Article IET Microwaves, Antennas and Propagation ; Volume 14, Issue 9 , 2020 , Pages 874-883 ; Memarian, M ; Eleftheriades, G. V ; Sharif University of Technology
Institution of Engineering and Technology
2020
Abstract
Dirac dispersion cones enable remarkable wave phenomena in electronics as well as electromagnetic systems. In this work, the authors experimentally demonstrate for the first time the Dirac leaky wave antennas (DLWAs) at millimetre-wave (mm-wave) frequencies. The demonstrated DLWAs are implemented in the substrate integrated waveguide technology, delivering unprecedented features at high frequencies such as radiation at, and continuous beam scanning through broadside, with ease of fabrication, making these designs well suited for mm-wave applications such as emerging fifth generation and Internet of Things, radar and imaging. It is shown that a planar Dirac photonic crystal can be realised...
Analytical study of open-stopband suppression in leaky-wave antennas
, Article IEEE Antennas and Wireless Propagation Letters ; Volume 19, Issue 2 , 2020 , Pages 363-367 ; Memarian, M ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2020
Abstract
In the majority of leaky-wave antennas (LWAs), the lack of broadside radiation is due to the existence of an open-stopband (OSB) at broadside. In this letter, we present a study on the OSB suppression in LWAs. In particular, we start from a simple unit cell comprising a planar waveguide having alternating open and short sidewalls. The analytical and simulated band structures testify consistently that OSB suppression can indeed be realized by proper design, analytically studied using mode-matching, and further supported by full-wave simulations. An LWA is then implemented using the substrate integrated waveguide (SIW) technology, which provides interesting features such as a high directive...