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A half-width mictrostrip leaky-wave antenna (HWMLWA) fabricated using a Polyjet 3D printer is presented. The dielectric region of the antenna is 3D (3-dimensional) printed and it is followed by a sputter deposited copper (Cu) layer and electroplating of a thick layer. This layer is patterned using a demascene-like process. The antenna structure consists of a long strip of line which is shorted to...
Magnetoelectric materials exhibit altered permeability with the application of a static electric field. As such magnetoelectric materials have the potential to affect the radiation properties of antennas loaded with such a material. In this paper, we explore the radiation properties of patch antennas loaded with slabs of magnetoelectric hexaferrite materials. It is shown that changes in permeability,...
Leaky-wave antennas provide advantages including high directivity, their relative broadband nature and their ability to scan the principle beam with frequency that may be useful for various applications. They can also be designed with different guiding structures. Half-width leaky-wave microstrip antennas have been studied extensively because of the simplicity of feeding them and the ease of fabricating...
A multilayered metamaterial-inspired antenna with a pixel grid loading structure is introduced. The antenna consists of two patterned metal layers separated by a thin dielectric film. The first layer contains a folded monopole antenna surrounded by a metal pixel-based loading structure, whereas the second layer consists of a photoconductive pixel grid utilized to tune the antenna. Appropriate pixel...
Radiation by a microstrip patch antenna is well understood. Although typically such antennas are fed in a manner to achieve linear polarization, circular polarization is also of interest. Of more recent interest is the use of engineered composite materials (e.g. metamaterials) to control radiation. In some cases, inherently anisotropic materials have been characterized using isotropic inversion methods...
The anisotropic behavior of engineered materials is not often taken into account in the design of antennas, usually because the material properties are not well characterized. In this paper, a step is taken toward the measurement of the anisotropic properties of materials by developing specific methodologies for the characterization of biaxially anisotropic and gyromagnetic materials. These techniques...
Maintaining a narrow beamwidth is difficult for a linear phased array antenna comprised of wide beamwidth antenna elements with peak gain direction normal to the axis of the array as the beam is steered close to end-fire. Rather, use of near end-fire antennas, either singly or arrayed, offer the potential for achieving reasonably narrow beamwidth even as the beam is steered near endfire. For applications...
A half-width microstrip leaky-wave antenna (HMLWA) having electronic beam steering capabilities is presented. Electronic beam scanning is demonstrated in X-, Ku- and Ka-bands through detailed design analysis and measurements. Two physical design approaches are studied; one requiring multi-layer processing and another requiring only a single layer metallization. In this paper, only the single layer...
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