For the first time, a tunable reflected phase reflectarray is demonstrated in the thermal infrared. This is done using thermochromic VO(2) square-patch elements in a reflectarray metamaterial configuration. A sixty degree change in reflected phase is measured using a Twyman-Green interferometer, and FTIR measurements show that the resonance reflection minima shifts from 9.2 to 11.2 mum as the s...

In this paper, a class of Bow-tie unit cell on FR4 substrate is designed and investigated to be used in implementing single-layer broadband Reflectarray Antenna (RA). the analyzing step, two different parameters (length angle) grounded Cross Bow-Tie (CBT) are varied obtain phase diagrams. Various degrees freedom CBT structure very helpful designing RA. antenna design procedure, an efficient syn...

This work presents a review of the generalized intersection approach (GIA) for electromagnetic array antenna beam-shaping synthesis. After briefly describing mechanics classical IA, we show extensions to IA that make GIA more powerful algorithm. In short, these improvements consist in working with squared field magnitude improve convergence properties algorithm, and use general minimization alg...

The demand for multi-band high-power antennas, which have been rarely reported, becomes urgent in microwave field. To meet the demand, a C/X dual-band circularly polarized patch reflectarray antenna is proposed this paper. Two main technologies are adopted to make realize feature. Firstly, elliptical with no abrupt structure be reflecting element mitigate electric field concentration. Secondly,...

An independently controllable dual-beam reflectarray antenna is presented using a broadband dual-polarized single-layer 1 bit unit cell. The cell provides two-state phase compensation for two orthogonally linearly polarized waves. 180° reflective difference between the states achieved by tuning magnetic resonance of State 0 and electrical 1. With its resonances close to each other, has ± 20° ov...

This paper presents the design and implementation of a reconfigurable reflectarray element design using commercially available RF MEMS switches. This reconfigurablity allows for dynamic control of individual radiating elements by electronically manipulating the switch configuration. The reflectarray element chosen here consists of a microstrip patch on the top surface with a slot in the ground ...

An equivalent circuit approach is adopted in this paper to analyze a novel varactor loaded phasing line, specifically designed to improve the frequency agility features of reconfigurable aperture-coupled reflectarray cell, through the use of a couple of microstrip radial stubs. The proposed analysis method is fruitfully implemented to perform a fast and preliminary investigation on the improvem...

We theoretically demonstrate the generation and detection of broadband multi-channel Orbital Angular Momentum(OAM) by a micrometer-scale meta-reflectarray. The meta-reflectarray composed of patterned silicon bars on a silver ground plane can be designed to realize phase modulation and work as chip-level OAM devices. Compared to traditional methods of OAM generation and detection, our approach s...

This communication aims to address the recent surge of interest in reconfigurable intelligent surfaces (RISs) among both academic and industrial communities, which has largely neglected historical developments two other underpinning technologies, i.e., liquid crystal on silicon (LCOS) reflectarray antenna (LCRA). Specifically, this focuses state art LC-RIS, highlighting unique features newly ra...