Analysis of aperture-coupled microstrip antennas with a superstrate using space domain closed form Green's functions is presented. Integral equations are derived from applying the boundary conditions on the radiating patch, across the aperture, and on the microstrip feedline. The computation of space domain green's functions is performed using the closed-form. The solution of the integral equat...

Analysis of aperture-coupled microstrip antennas with a superstrate using space domain closed form Greens functions is presented. Integral equations are derived from applying the boundary conditions on the radiating patch, across the aperture, and on the microstrip feedline. The computation of space domain greens functions is performed using the closed-form. The solution of the integral equatio...

In this paper, novel applications of metamaterials composite structure in antenna engineering has been considered. Compared with the conventional materials, metamaterials exhibits some specific features which are not found in conventional materials. Some unique applications of these composite structures as an antenna substrate, superstrate, feed networks, phased array antennas, ground planes, a...

A novel electromagnetic-based method is presented for monitoring elemental sulfur deposition within a natural gas-carrying pipeline. The deposited behaves as superstrate layer above sensing microstrip patch antenna that optimally placed on the inner wall of gas Increasing thickness by alters resonance behavior, which can be monitored externally using vector network analyzer. effect uneven or bu...

A beam-steering antenna based on non-uniform metasurface superstrate and artificial magnetic conductor (AMC), operating at 3.5 GHz, is proposed. The can steer the beam along ? = ?18° 18° with 0° in absence of almost zero scan loss. proposed structure consists a top layer made 20 × grid electrically-small square-shaped metallic pixels while bottom part AMC 5 pixels. radiating element, CPW-fed mo...

Transmission and reflection characteristics of inductive-mesh frequency-selective surfaces were measured in the 4-12-microm range. Specific issues investigated include the effect of interelement spacing on the location and width of the resonance and the influence of superstrate and substrate refractive indices on the spectral response of the structure.

analysis of aperture-coupled microstrip antennas with a superstrate using space domain closed form greens functions is presented. integral equations are derived from applying the boundary conditions on the radiating patch, across the aperture, and on the microstrip feedline. the computation of space domain greens functions is performed using the closed-form. the solution of the integral equatio...

Negative-index metamaterials (NIMs) at near infrared wavelengths (~2 mum) are fabricated with circular, elliptical and rectangular holes penetrating through metal/dielectric/metal films. All three NIM structures exhibit similar figures of merit; however, the transmission is higher for the NIM with rectangular holes as a result of an improved impedance match with the substrate-superstrate (air-g...