Results 21 to 30 of about 10,662,693 (288)
Sensors, 2020 This article presents the effect of fiber Bragg gratings side lobes on interrogation systems consisting of sensor and matched filters. The conducted research shows that high-value side lobe structures applied as sensors and/or filters are characterized ...
Krzysztof Skorupski +3 more
doaj +1 more source
IWO-based Synthesis of Log-Periodic Dipole Array [PDF]
The Invasive Weed Optimization (IWO) is an effective evolutionary and recently developed method. Due to its better performance in comparison to other well-known optimization methods, IWO has been chosen to solve many complex non-linear problems in ...
Lazaridis, Pavlos
core +3 more sources
Low-crosstalk silicon-photonics arrayed waveguide gratings integrated with micro-ring filter
Frontiers in Physics, 2022 A low-crosstalk compact arrayed waveguide grating integrated with a tunable micro-ring resonator is demonstrated on silicon-on-insulator platform, The side-lobe of the silicon nanowire AWG, introduced by fabrication errors, can be effectively suppressed ...
Shiping Liu +6 more
doaj +1 more source
Preoperative amygdala fMRI in temporal lobe epilepsy [PDF]
, 2009 Purpose: Anterior temporal lobe resections (ATLR) benefit 70% of patients with refractory mesial temporal lobe epilepsy (TLE), but may be complicated by emotional disturbances.
Silvia B. Bonelli +13 more
core +1 more source
Design and Development of Frequency Agile Reflectarray Antenna
Journal of High-Frequency Communication Technologies, 2023 This paper presents the design of a frequency reconfigurable reflectarray with concentric circular rings. The PIN diode connected between a phase delay line and the ring produces reconfigured resonances at 16 GHz and 10.4 GHz.
Kavitha Narayanasamy +3 more
doaj +1 more source
IET Microwaves, Antennas & Propagation, 2022 In this paper, two H‐plane horn antennae are designed using groove and ridge gap waveguide (GGW and RGW) techniques. In the proposed structures, the gap waveguide is partially filled with a dielectric to control the amplitude and phase distribution ...
Mohammad Mohammadpour +2 more
doaj +1 more source
Sensors, 2022 This article presents a novel optimization algorithm for large array thinning. The algorithm is based on Discrete Particle Swarm Optimization (DPSO) integrated with some different search strategies.
Wanhan Cai +4 more
doaj +1 more source
Sensors, 2022 This paper presents the application of CORPS (coherently radiating periodic structures) for feeding CRA (concentric rings array) with a reduced number of phase shifters.
Brian Sanchez +4 more
doaj +1 more source
Optimal Wideband LPDA Design for Efficient Multimedia Content Delivery over Emerging Mobile Computing Systems [PDF]
, 2015 An optimal synthesis of a wideband Log-Periodic Dipole Array (LPDA) is introduced in the present study. The LPDA optimization is performed under several requirements concerning the standing wave ratio, the forward gain, the gain flatness, the front-to ...
Lazaridis, Pavlos I. +8 more
core +1 more source
Impact of a purina fractal array geometry on beamforming performance and complexity [PDF]
, 2013 This paper investigates the possible benefits of using a Purina fractal array for beamforming, since this particular fractal has recently been suggested as the flight formation for a fractionated space craft.
Weiss, Stephan +6 more
core +4 more sources