In this article, a 7×7 reconfigurable reflectarray operating at X- band is proposed and experimentally verified. The consists of linearly polarized, dual-resonance, tunable unit cells fabricated on single layer. Reconfigurability achieved by loading each dual-resonance cell with four varactors; the two resonances provide phase range greater than 360°. design utilized in analyzed using full-wave Floquet simulations. A biasing network supporting individual array element designed, allowing...

Tunable reflectarray unit cells operating at K <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">a</sub> <sup xmlns:xlink="http://www.w3.org/1999/xlink">-</sup> and X-bands are presented in this paper using barium strontium titanate (BST) technology. A patch antenna is capacitively loaded with a narrow gap the middle thin-film BST layer deposited under patch. By tuning dc-bias voltage across gap, dielectric properties of changed then an integrated...

A 5 × 9 beamsteering reflectarray operating at K <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">a</sub> -band is presented in this paper. Continuous achieved through the use of barium strontium titanate (BST) technology. BST monolithically integrated into each unit cell using clean room fabrication techniques. With application dc bias voltage, an tunable capacitor realized. The design utilized analyzed and multiple biasing schemes are assessed....

A single-layer dual-resonance tunable reflectarray unit cell supporting a single linear polarization and operating at X-band is presented in this paper. The composed of cross element ring element, both capacitively loaded with varactors, enabling reconfigurability. An equivalent circuit developed verified to demonstrate the dual-resonant operational theory aid design cell. used underlying physics antennas provides systematic procedure. proposed evaluated using full-wave simulations...

In this paper, a dual resonant, electronically-reconfigurable, phase-agile reflectarray element is presented. The operates at X band and supports two linear polarizations. Reconfigurability enabled through the symmetric placement of varactors across gaps in both resonant elements. use structure creates phase range excess 450 degrees with an average loss 2.7 dB.

In this paper, a tunable multi-resonant element designed by coupling ring to microstrip patch antenna is presented. By loading the with variable Barium Strontium Titanate (BST) capacitor, tunability realized. To showcase its enhanced performance, compared single resonant elements, reference and are also simulated. The ring-loaded shown have significantly higher phase range bandwidth elements. presented unit cell finds applications where ranges compact form-factor desired for reflectarray design.

In this report, the ongoing research at University of Central Florida on realization tunable and flexible electronics using Barium Strontium Titante (BST) is discussed. Using novel design fabrication technologies, a reconfigurable reflectarray based BST-integrated capacitively-loaded patch elements operating K <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">a</sub> band shown. addition, our current BST-based ring-loaded phase shifters are By...

In this paper, a K <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">a</sub> -band tunable dual resonance reflectarray element, its design methodology, limitations, and tradeoffs are presented. Tunability is achieved by loading the antenna element with Barium Strontium Titanate (BST) thin film. The effects of limited frequency tuning, coupling conditions, inherent loss investigated using full-wave simulations. A unit cell demonstrating an overall...

In this paper, a V-band tunable reflectarray unit cell using an interdigital gap loading structure is presented. Tunability achieved by the antenna element with Barium Strontium Titanate (BST) thin film along IDC gap. The effects from substrate thickness and patch width on reflection properties are investigated full-wave simulations. A design demonstrating overall phase range of 216.3° maximum loss 6.7dB at 59.28 GHz realized. presented benefits monolithic integration BST allows for high...

In this paper, the loss optimization of a reconfigurable dual-resonance reflectarray array element is presented. First an equivalent circuit developed which models electrical performance element. The major sources in are then discussed before used to evaluate external coupling's effect on and phase range minimize element's while maintaining greater than 360°. Finally, optimized