Results 41 to 50 of about 6,614,970 (338)

Conductor having two frequency-selective surfaces [PDF]

, 2011
An antenna having two frequency-selective surfaces is disclosed. The antenna includes a first frequency-selective surface (FSS) having multiple holes to form a mesh, a second FSS having a multiple holes to form a mesh, and a perfect electric conductor ...
Ragan, Lawrence H.
core   +1 more source

Bandwidth Control of Loop Type Frequency Selective Surfaces Using Dual Elements in Various Arrangements

, 2021
Frequency selective surfaces (FSSs) have applications across multiple disciplines due to their unique electromagnetic properties. This paper investigates the use of both rounded square loops, and simple loop type dual elements arranged in unique patterns,
Thiel, David V, O'Keefe, Steven G, Littman, Nickolas, Galehdar, Amir, Espinosa, Hugo G, Hugo G Espinosa, Amir Galehdar, Steven G O’Keefe, David V Thiel, Nickolas Littman   +9 more
core   +1 more source

Resonant frequencies of open and closed loop frequency selective surface arrays [PDF]

, 2000
The effects on the transmission responses of loop element frequency selective surface arrays of breaking the conductor at suitable locations are described for simple squares and for highly convoluted geometries based on Peano curves, This simple ...
Parker, Edward A., Chuprin, Andrei D., Batchelor, John C.   +2 more
core   +1 more source

Parameter Optimization of Frequency Selective Surfaces Made of Composite Materials

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2021
Debye model is used for approximating the frequency dependent complex effective permittivity of the composite structures in filter and shielding applications at microwave frequencies.
Abdullah Oğuz Kızılçay
doaj   +1 more source

Single-Layer Bandpass Active Frequency Selective Surface [PDF]

, 2008
A single-layer, bandpass, active FSS is presented. It shows good angle of incidence stability for TE incidence, at the operating frequency of 2.45 GHz. It is based on circular loop aperture with each unit cell having four PIN diodes.
Kenneth L. Ford, Chinthana Panagamuwa (1258632), Ford, Kenneth L., Weily, Andrew R., Ghaffer I. Kiani (7204973), Karu P. Esselle (7204976), John C. Batchelor (7206521), Ghaffer I. Kiani, Panagamuwa, C., Karu P. Esselle, John C. Batchelor, Esselle, Karu P., Ghaffer, I Kiani., Kenneth L. Ford (7204979), Batchelor, John C., Andrew R. Weily, C. Panagamuwa, Andrew R. Weily (7204982)   +17 more
core   +1 more source

Modelling and measurement of Frequency Selective Surfaces

, 2008
Frequency selective surfaces, FSS's, are used to make filters in the far infrared and submillimetre region, which can have low-pass, high-pass and band selection properties.
Weaver, S., Pisano, Giampaolo, Ade, Peter A. R., Tucker, Carole   +3 more
core   +5 more sources

Millimeter Wave Radar Object Detection Through Frequency Selective Surfaces [PDF]

, 2019
Millimeter wave (mmWave) radar systems are a leading technology in autonomous vehicle object sensing. The radar’s ability to detect surrounding objects is critical to its performance.
Trevithick, Jacob D
core   +1 more source

Finite frequency selective surface modelling

The 8th European Conference on Antennas and Propagation (EuCAP 2014), 2014
In this paper we describe the development of an electromagnetic modelling technique to investigate edge illumination effects on finite size FSS performance. The work extends the commonly used unit cell approach and models the FSS as a linear array with Gaussian beam excitation.
Dickie, Raymond, Cahill, Robert, Fusco, Vincent; id_orcid 0000-0002-4041-4027   +2 more
openaire   +3 more sources

Tuning Patch-Form FSS [PDF]

, 2010
The application of a novel biasing technique to tune frequency selective surfaces (FSS) made of patch elements is described. The methodology follows a recently developed technique where the biasing circuit of an active FSS is etched at the rear of a ...
Parker, Edward A., Robertson, J.-B., Sanz-Izquierdo, Benito, Batchelor, John C., B. Sanz-Izquierdo, E.A. Parker, J.-B. Robertson, J.C. Batchelor   +7 more
core   +1 more source

Thin Microwave Absorber Based on Laser-Induced Graphene Frequency Selective Surfaces

IEEE Journal of Radio Frequency Identification
This study presents a pioneering approach to fabricating single-layer Frequency Selective Surfaces (FSS) using Laser-Induced Graphene (LIG). The FSS structure proposed consists of periodic resistive patterns of LIG synthesized through a one-step laser ...
Yann Houeix, Francisco J. Romero, F. G. Ruiz, D. Morales, Noel Rodríguez, Darine Kaddour   +5 more
semanticscholar   +1 more source