16 citations · 45 across the 15 of their papers we have counts for
16 papers
A Wideband Holographic Array with Azimuth and Elevation Beam Steering for 5G/6G Applications
Hazhir Mohammadi, Amir Saman Nooramin, Homayoon Oraizi
This paper presents the design and fabrication of leaky-wave holograms with anisotropic properties, enabling circular polarization for single-beam radiation in desired directions.…
Wideband High Gain Metasurface-Based 4T4R MIMO antenna with Highly Isolated Ports for Sub-6 GHz 5G Applications
Mahdi Salehi, Homayoon Oraizi
This study presents the design of four wideband, high gain, highly efficient metasurface-based 4T4R MIMO (Multiple-Input Multiple-Output) antennas with hi…
Deep Learning Framework for the Design of Orbital Angular Momentum Generators Enabled by Leaky-wave Holograms
Naser Omrani, Fardin Ghorbani, Sina Beyraghi +2
In this paper, we present a novel approach for the design of leaky-wave holographic antennas that generates OAM-carrying electromagnetic waves by combining Flat Optics (FO) and mac…
Adiabatic Floquet-Wave Solutions of Temporally Modulated Anisotropic Leaky-Wave Holograms
Amrollah Amini, Homayoon Oraizi, Mostafa Movahediqomi +1
In this paper, the aperture field estimation technique and generalized adiabatic Floquet-wave expansion method is developed for two-dimensional temporally modulated anisotropic hol…
Temporally Modulated One-Dimensional Leaky-Wave Holograms
Amrollah Amini, Homayoon Oraizi
Spatio-temporally modulated impedance surfaces can be good candidates for generation of radiating waves with arbitrary eigenstates by breaking momentum and energy conservations. He…
Control of Orbital Angular Momentum Regimen by Modulated Metasurface Leaky-Wave Antennas
Amrollah Amini, Homayoon Oraizi
In this paper, we present the design procedure of modulated metasurface leaky-wave antennas (MMLWAs) to generate coaxial superposition of vortex beams with several orbital angular…
A deep learning approach for inverse design of the metasurface for dual-polarized waves
Fardin Ghorbani, Javad Shabanpour, Sina Beyraghi +3
Compared to the conventional metasurface design, machine learning-based methods have recently created an inspiring platform for an inverse realization of the metasurfaces. Here, we…
Holographic Transmitarray Antenna with linear Polarization in X band
Mahdi Salehi, Homayoon Oraizi
In this paper, we present the design and demonstration of transmitarray antennas (TAs) based on the holographic technique for the first time. According to the holographic theory, t…
Deep neural network-based automatic metasurface design with a wide frequency range
Fardin Ghorbani, Sina Beyraghi, Javad Shabanpour +3
Beyond the scope of conventional metasurface which necessitates plenty of computational resources and time, an inverse design approach using machine learning algorithms promises an…
Implementation of conformal digital metasurfaces for THz polarimetric sensing
Javad Shabanpour, Sina Beyraghi, Fardin Ghorbani +1
Monitoring and controlling the state of polarization of electromagnetic waves is of significant interest for various basic and practical applications such as linear position sensin…
Adiabatic Floquet-Wave Expansion for the Analysis of Leaky-Wave Holograms Generating Polarized Vortex Beams
Amrollah Amini, Homayoon Oraizi
This paper presents the combination of aperture field estimation (AFE) technique and adiabatic Floquet-wave (AFW) expansion method for the analysis of leaky-wave holograms capable…
Broadband Tunable Terahertz Polarization Converter based on Graphene-shaped Metasurfaces
Behnaz Bakhtiari, Homayoon Oraizi, Ali Abdolali
In this paper, a broadband tunable polarization converter based on graphene metasurfaces is proposed. This polarization converter works in the terahertz (THz) frequency region, usi…
Wide-scanning Circularly Polarized Reflector-based Modulated Metasurface Antenna Enabled by a Broadband Polarizer
Ali Mohammad Hakimi, Ali Keivaan, Homayoon Oraizi +1
A circularly polarized leaky-wave antenna capable of frequency scanning is proposed in this paper. The main objective is to achieve high gain and polarization purity without the ne…
Reconfigurable honeycomb metamaterial absorber having incident angular stability
Javad Shabanpour, Sina Beyraghi, Homayoon Oraizi
Ultrawide-angle electromagnetic wave absorbers with excellent mechanical properties are required in many diverse applications such as sensing, and stealth technologies. Here, a nov…
Some useful approximations for calculation of directivities of multibeam power patterns of large planar arrays
Javad Shabanpour, Homayoon Oraizi
In this paper, by adopting the superposition of terms with unequal coefficients, some useful closed-form formulas for the class of large planar arrays are presented for predicting…
Collimating cylindrical Surface Leaky Waves for Highly Improved Radiation Characteristics of Holograms
Mohammad Moein Moeini, Homayoon Oraizi, Amrollah Amini
High resolution microwave leaky wave holograms excited by center-fed cylindrical surface wave launcher show a null at object wave direction which is an undesired effect for electro…