Symmetry-breaking manipulation in the design of multifunctional tunable frequency selective surface

Mir, Farzad; Matekovits, Ladislau; Sabata, Aldo De

doi:10.1016/j.aeue.2021.154003

Cited by 6 publications

(6 citation statements)

References 19 publications

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“…The behavior of the PIN diode corresponds to a small R (ON-state) when the CN is connected to high voltage, which denotes an almost short-circuit. On the other hand, when low power is provided to the structure, the PIN diodes behave like capacitors (OFF-state) [11]. The diodes realize either a short or a capacitive load, which changes the resonant frequency, so that the structure becomes switchable in function of the voltage drop at the generator terminals.…”

Section: Design Of Unit Cellsmentioning

confidence: 99%

“…Two different design structures have been proposed in refs. [11,19]. The first one, which has been designed in a circular shape, has a fundamentally symmetric structure, while the second one, represented by an elliptical structure, has been designed to fulfill requirements such as polarization filtering, polarization conversion, and full notch, which literally needed different symmetries.…”

Section: Design Of Unit Cellsmentioning

confidence: 99%

“…The primary drawback of typical FSS structures is their dependence on the angle of incidence of electromagnetic waves for their reflection and transmission properties. As solutions to this problem and in order to design tunable/switchable FSSs, engineers are increasingly incorporating lumped elements into designs, using two main variants: by means of varactor diodes or PIN diodes [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, a DC bias network (Control network-CN) must be utilized in designs with active components. Microstrip lines implanted in the substrate can be thought of as feeding lines for biasing the nonlinear elements rather than biasing them directly inside the structure through several wires [11,12]. The topic of designing tunable/switchable FSSs devices, including FSSs, is one of the most challenging in many fields of science, as demonstrated by the large number of research groups wordwide working on it [9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Design and Experimental Validation of a Switchable Frequency Selective Surface with Incorporated Control Network

Silaghi

Mir

Sabata

et al. 2023

Sensors

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Tunable/switchable devices are more and more required in modern communication systems. However, the realization of the tuning requires the presence of active devices, which in turn must be biased. The current paper comes up with a solution for designing and experimentally validating such a switchable Frequency Selective Surface. Two different metallic structures are simulated and measured, having incorporated the same topology control network (CN). In this scenario, the main innovation of this paper is the presence of the feeding part, namely the control network. In this work, the main FSS structure is flanked by three parallel CN microstrip lines and several via holes that allow biasing the active elements, namely PIN diodes. The switchability of the proposed structure is achieved through PIN diodes, whose bias determines the values of the elements in the equivalent circuit. At different biases, the response of the FSS changes accordingly. From all possible values of the bias, the extreme cases when the diodes act as (almost) short- and open-circuits are considered in the submitted manuscript for the sake of brevity. These cases are modeled by the main and cut-slot structures, respectively. The proposed structures have been evaluated using electromagnetic simulation and implemented on an FR4 substrate having a thickness of 1.58 mm. With the periodicity of the square-shaped unit cell of 18 mm edge length, different filtering bands are obtained below 12 GHz. Another novelty that has received very little consideration in the existing literature is the use of a finite array of unit cells instead of an infinite one. And finally, tests in an anechoic chamber have proved that there is a good agreement between practical and simulation results and also demonstrated the proper performance of the devices for wide angular incidence for both TE and TM polarizations.

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Section: Design Of Unit Cellsmentioning

confidence: 99%

Section: Design Of Unit Cellsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design and Experimental Validation of a Switchable Frequency Selective Surface with Incorporated Control Network

Silaghi

Mir

Sabata

et al. 2023

Sensors

Self Cite

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“…These features help without human interaction positions of antennas for better communications improve. Also, robots are becoming more and more popular for measuring methods due to their high rate of accuracy [13].…”

Section: Introductionmentioning

confidence: 99%

Implementation of 5-axis Robot Arm for Automatic Processes

Bayir

Kouhalvandi

Mir

2022

Acta Marisiensis. Seria Technologica

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This project devotes to implement the 5-axis movable robot arm leads to provide an automated process for capturing the utensils. The main target is to perform material separation manually and via android program using a 5-axis movable robot arm. In this generated environment, there is information about the electrical circuits, mechanical structures and software of a robot arm that can be used in automation systems. Practically, an experimental study is developed to move the robot arm by adjusting the angular values it receives by remote connection and positioning the motors. 3D printer filaments, which are light in weight, and gear sets of the servo motor are used in order not to burden the servo motors in the mechanical parts of the robot.

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Making UWB Antennas Unidirectional: Phase Coherence with an Ultra-Wide Band Frequency Selective Surface Reflector

Thalakotuna,

Esselle,

Matekovits

et al. 2024

The Advancing World of Applied Electromagnetics

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Symmetry-breaking manipulation in the design of multifunctional tunable frequency selective surface

Cited by 6 publications

References 19 publications

Design and Experimental Validation of a Switchable Frequency Selective Surface with Incorporated Control Network

Design and Experimental Validation of a Switchable Frequency Selective Surface with Incorporated Control Network

Implementation of 5-axis Robot Arm for Automatic Processes

Making UWB Antennas Unidirectional: Phase Coherence with an Ultra-Wide Band Frequency Selective Surface Reflector

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