Search Results - "Chaharmir, Reza"

Design of a Multilayer X-/Ka-Band Frequency-Selective Surface-Backed Reflectarray for Satellite Applications by Chaharmir, Mohammad Reza, Shaker, Jafar

“…A dual-band X-/Military Ka-band (MKa-band) single-aperture reflectarray structure that transmits and receives at both MKaand X-bands is introduced in this…”
Get full text

A Wideband Transmitarray Using Dual-Resonant Double Square Rings by Ryan, Colan G M, Chaharmir, Mohammad Reza, Shaker, J, Bray, Joey R, Antar, Yahia M M, Ittipiboon, A

“…A four-layer transmitarray operating at 30 GHz is designed using a dual-resonant double square ring as the unit cell element. The two resonances of the double…”
Get full text

Design of Broadband, Single Layer Dual-Band Large Reflectarray Using Multi Open Loop Elements by Chaharmir, M R, Shaker, J, Gagnon, N, Lee, D

“…A novel method is introduced to design a single layer, dual-band large printed reflectarray with open loop elements of variable size for both bands. The…”
Get full text

Line Defect-Layered EBG Waveguides in Dielectric Substrates by Hettak, Khelifa, Roy, Langis, Shaker, Jafar, Ouassal, Hassna, Chaharmir, Reza

“…A dielectric-based multilayer structure composed of U-shaped rings (ML-UR) is used to develop a class of novel electromagnetic band gap (EBG) slab waveguide…”
Get full text

Feed Image Lobes in Offset-Fed Reflectarrays: Diagnosis and Solution by Almajali, E'qab, McNamara, Derek A., Shaker, Jafar, Chaharmir, Mohammad Reza

“…The actual source of the "feed image lobe" in fixed-beam single-layer offset-fed reflectarrays composed of variable-size patch or dipole elements is diagnosed…”
Get full text

Derivation and Validation of the Basic Design Equations for Symmetric Sub-Reflectarrays by Almajali, E., McNamara, D., Shaker, J., Chaharmir, M. R.

“…The basic design equations for symmetrical sub-reflectarrays are derived. These provide the required phase-distribution on the sub-reflectarray surface. Both…”
Get full text

Novel photonically-controlled reflectarray antenna by Chaharmir, M.R., Shaker, J., Cuhaci, M., Sebak, A.-R.

“…A novel method for generating a reconfigurable reflectarray based on the creation of photoinduced plasma inside the semiconductor substrate of a reflectarray…”
Get full text

Scatterer Surface Design for Wave Scattering Application by Samadi, Fereshteh, Akbari, Mohammad, Chaharmir, Mohammad Reza, Sebak, Abdelrazik

“…In this paper, radio wave scattering is considered and an optimal scatterer surface is realized. For this purpose, an ultrawideband and high-efficiency…”
Get full text

Investigation of FSS-Backed Reflectarray Using Different Classes of Cell Elements by Shaker, J., Chaharmir, R., Legay, H.

“…A variety of cell elements are presented in this paper for the construction of frequency selective surface (FSS) backed reflectarrays. Among the cell elements…”
Get full text

Broadband Transmitarray Antenna Design Using Polarization-Insensitive Frequency Selective Surfaces by Niroo Jazi, M., Chaharmir, Mohammad Reza, Shaker, Jafar, Sebak, Abdel R.

“…Applications of frequency selective surfaces (FSSs) for transmitarray antennas (TAs) are investigated. Two broadband polarization-insensitive FSS elements are…”
Get full text

Flexible Ink-Minimized Screen-Printed Frequency Selective Surfaces With Increased Optical Transparency for 5G Electromagnetic Interference Mitigation by King, Daniel J., Hettak, Khelifa, Chaharmir, Mohammad Reza, Gupta, Shulabh

“…A thin, flexible, and transparent polyethylene terephthalate (PET) based screen-printed band-stop frequency selective surface (FSS) with ink minimization is…”
Get full text

Realization of Large Dielectric Resonator Antenna ESPAR by Movahedinia, Reza, Chaharmir, Mohammad Reza, Sebak, Abdel R., Nikkhah, Mohammad Ranjbar, Kishk, Ahmed A.

“…A large array of dielectric resonator antenna (DRA) is designed in X-band based on electrically steerable parasitic array radiator (ESPAR) concept. This large…”
Get full text

X -Band Circularly Polarized Electronically Steerable Parasitic Array Radiator of DRA by Movahedinia, Reza, Sebak, Abdel-Razik, Chaharmir, Mohammad Reza, Ranjbar Nikkhah, Mohammad, Kishk, Ahmed A.

“…In this paper, an <inline-formula> <tex-math notation="LaTeX">X </tex-math></inline-formula>-band electronically steerable parasitic array radiator (ESPAR) of…”
Get full text

Phase-Only Synthesis Methods for General Beam-forming Reflective Metasurfaces by King, Daniel, Hettak, Khelifa, Chaharmir, Reza, Ethier, Jonathan, Gupta, Shulabh

“…Two methods for synthesizing the phase profile of a reflective metasurface are presented based on Woodward-Lawson (WL) method and amplitude-to-phase mapping…”
Get full text

Ink Minimized Meshed Frequency Selective Surfaces with Increased Optical Transparency for 5G by King, Daniel, Hettak, Khelifa, Chaharmir, Reza, Ethier, Jonathan, Gupta, Shulabh

“…This study examines the conductive ink minimization of 5G engineered electromagnetic surfaces (EESs) made from meshed conductors. The paper demonstrates that…”
Get full text

Reflectarray Design With Similarity-Shaped Fragmented Sub-Wavelength Elements by Ethier, Jonathan L. T., McNamara, Derek A., Chaharmir, Mohammad Reza, Shaker, Jafar

“…A new technique for synthesizing reflectarray antennas is presented. It utilizes fragmented elements in a manner that allows the elements of the reflectarray…”
Get full text

Monolithic-Integrated MEMS-Tunable Reflective Cell for Ku-Band Mobile Satellite Two-Way Connectivity by Moghadas, Hamid, Daneshmand, Mojgan, Mousavi, Pedram, Chaharmir, Mohammad Reza, Shaker, Jafar

“…This paper presents the design and measurement of a single-layer micro-electromechanical system (MEMS)-tunable reflective unit cell with orthogonally polarized…”
Get full text

Level of detail of the physical environment and its impact on propagation prediction for a 60-GHz fixed radio link by Amaya, Cesar, LeClair, Marcel, Picard, Vincent, Chaharmir, Reza, Li, Ming, Perras, Simon

“…3D models that capture the characteristics of a physical environment in downtown Ottawa with three different levels of detail (LOD) have been developed. This…”
Get full text

Electromagnetic Engineered Surface Gratings at 5G Bands Using Printed Electronics by Ethier, Jonathan, Chaharmir, Reza, Shaker, Jafar, Hettak, Khelifa

“…Electromagnetic engineered surfaces (EES) are a recently introduced concept with the implementation goal of controlling the electromagnetic scattering in…”
Get full text

Grating Lobe Control in Dual-Feed Single-Beam Reflectarrays and Power Combiners by Almajali, E'qab, McNamara, Derek A., Shaker, Jafar, Chaharmir, M. Reza

“…The reason for the presence of unwanted sidelobes in multifeed single-beam reflectarrays and power combiners is shown to be a grating lobe phenomenon due to…”
Get full text