high impedance surface
A Varactor-Tunable High Impedance Surface for Active Metamaterial Absorber
... Abstract—One varactor-tunable High Impedance Surface (HIS) is proposed and used in design of an active metamaterial absorber. The proposed HIS structure is based on mushroom-type HIS, in which ...
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A Tunable High Impedance Surface and its Application to Dual-Band Microstrip Antenna
... Abstract—This paper presents a simple method of tuning the AMC band of a high-impedance surface. The tunability is obtained with only two varactor diodes and a simple bias-network. The proposed ...
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Simultaneous Switching Noise Mitigation Capability with Low Parasitic Effect Using Aperiodic High-Impedance Surface Structure
... aperiodic high-impedance surface structure is proposed to improve low frequency parasitic effect of the HIS structure to suppress the SSN in high-speed ...
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Directional Dual-Band Slot Antenna with Dual-Bandgap High-Impedance-Surface Reflector
... The novel compact EBG structure providing a dual-bandgap function is reported. In comparison with the conventional square patch high- impedance-surface, the proposed EBG structure is more compact. ...
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Optimum High Impedance Surface Configuration for Mutual Coupling Reduction in Small Antenna Arrays
... layered High Impedance Surface structure will be used inspired from [14], although further improvements in terms of size and cost can be achieved ...
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Co axial Feed Rectangular Patch Antenna over High Impedance Surface
... HIS( High Impedance Surface) as reflecting ground plane insisted of optically planar ground ...the surface waves, next it will reflects the waves in ...
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Dual-Band Low Profile Directional Antenna with High Impedance Surface Reflector
... dual-band high impedance surface (HIS) electromagnetic band-gap (EBG) structure is designed as a reflector for a dual-band coplanar waveguide (CPW)-fed planar monopole ...
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Radar Cross Section Reduction Property of High Impedance Surface on a Lossy Dielectric
... Abstract—A detailed study on the performance of a high impedance surface on lossy dielectric is presented in this paper. It is observed that the structure, which is an array of square loops on a ...
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Controlling the Frequency of Simultaneous Switching Noise Suppression by Using Embedded Dielectric Resonators in High-Impedance Surface Structure
... for high-impedance surface (HIS) embedded dielectric resonator (DR) structures to efficiently control bandwidth of suppression simultaneous switching noise (SSN) in high speed digital printed ...
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Compact High impedance surface antenna for IEEE S band communication
... Wireless communication is one of the widely used fields for research. In wireless communication, micro strip antenna is the promising candidate for its small size, light weight and easy fabrication process. The authors ...
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Optimization of characteristics of Dipole antenna with high impedance surface at 2.4 GHz
... A high-impedance surface, shown in cross section in Figure 1, consists of an array of metal protrusions on a flat metal sheet. They are arranged in a two-dimensional lattice, and are usually formed ...
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Evaluating the Electromagnetic Surface Wave of High Impedance Structures by Monopole Antenna and Application for Patch Antennas at Q Band
... the surface of HIS are observed graphically at different frequencies within and outside the resonance (corresponding to ...the high impedance surface ...of surface wave suppression is ...
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High impedance earth fault modelling
... The positive outcome of the Once Cycle Difference Filter calculations in section 7.3.2 warrants further investigation with the Schweitzer Engineering Laboratories SEL-451 relay. The created waveforms indicate that ...
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Simulating transient scattering from obstacles with frequency dependent surface impedance
... using surface impedance and the frequency domain ...of surface properties is crucial in obtaining realistic simulations, and the obstacles and boundaries typically encountered in real-world scenarios ...
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High Impedance Surfaces Based Antennas for High Data Rate Communications at 40 GHz
... The high-impedance electromagnetic surface studied here is the mushroom-like structure shown in Figure 1(a). The unit cell is composed of a metallic patch connected to the ground plane with a ...
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High-Sensitivity Vegetation High-Impedance Fault Detection Based on Signal's High-Frequency Contents
... It may be important to mention that the proposed method does not affirm to have higher accuracy than previously existing approaches. The key novelty of this work is related to its specificity regarding fault type ...
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Acoustics in a two deck viscothermal boundary layer over an impedance surface
... For the parameters used here, flow over an acoustic liner is unstable, as shown in figs. 7b and 9 for the full LNSE. The asymptotics derived here correctly reproduce this stability behaviour away from the critical layer. ...
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A model for human skin impedance during surface functional neuromuscular stimulation
... The system proposed here to model the skin bulk dc impedance is shown in Fig. 4. It consists of the parallel ar- rangement of a constant linear capacitor, , with a nonlinear time-dependent resistor , which is in ...
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Impedance model for a high-temperature ceramic humidity sensor
... by impedance spectroscopy, which is a powerful tool to characterize elec- trochemical systems and therefore a promising method to gain many different, humidity-dependent signals from one physical ...sensor ...
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Electrochemical Impedance Spectroscopy Investigation of a Polyurethane Coating on Bridge 16Mnq Steel Surface
... phase angle of 45° in the capacitive-resistive transition region could be determined experimentally by calculating the delaminated area in the initial stages of delamination as displayed in impedance spectra. For ...
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