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Metasurfaces are thin (2D) metamaterials designed for manipulating the dispersion properties of surface-waves (SWs) or the reflection properties of incident plane-waves. Thanks to the sub-wavelength sizes of the patches used in the implementation step, these surfaces can be described by a surface impedance boundary condition (IBC). In this paper, we investigate a “Method of Moments” (MoM) based analysis...
A kind of polarization-dependent High Impedance Surface is designed in this paper. We put it under the printed dipole antenna as a reflecting plane. It makes linearly polarized printed dipole antenna radiate circularly polarized waves. We get an axial ratio of 0.73dB at 4.67 GHz, which is a good circularly polarization effect. At the same time, this antenna has a high gain and low profile. Moreover,...
The properties of the High Impedance Surfaces are used to design a ground plane for an antenna source to obtain a desired radiation pattern. Surface impedance modulation and microwave holography techniques are used to vary the surface impedance of the ground plane in a systematic pattern to achieve the desired radiation pattern for the antenna system. The ground planes are designed separately for...
A novel microstrip antenna configuration is proposed for the adjustment of its resonance frequency, where grounded metallic strips (as a groove filled with soldering tin or a line of metalized vias) are placed along the rectangular patch edges. The adjustment of the operating frequency may be performed by the gap spacings between the patch and strips. The proposed patch antenna configuration leads...
Microstrip Antennas (MSAs) consist of a metallic radiating patch on one side of thin dielectric substrate and other side is ground plane. Most important advantages of MSAs are low profile, light weight and compatibility with integrated circuit technology. MSAs are used in mobile communication, satellite communication, radar, direct broadcasting, global positioning systems and remote sensing. The major...
In this paper, the design of a compact planar bandpass filter above a defected ground plane is presented. The filter is designed as a combination of microstrip resonators and exploits the properties of a planar electromagnetic bandgap (EBG) structure patterned unto the ground plane of the printed circuit board material to provide a very wide stopband of up to 5 times the fundamental frequency. The...
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