This paper describes the generation of directive beams at two different frequencies with same circular metasurface (MTS) antenna based on a surface wave (SW) excitation. Two methods are presented to achieve desired bi-chromatic beam operation. The first one consists in mathematically superimposing MTS modulations, each matched SW wavelength frequency. In second method, period modulation matches...

Language and emotion are two related systems in use, in that one system (emotions) impacts the performance of the other (language). Both of them share their functionality in communication. Since the nature of foreign language classrooms is ideally interactional, emotional intelligence (EI) gains importance. The aim of this study was to find out whether one's total emotional quotient and its com...

Mobile terminals are often used indoor with the base station outdoors. At the mobile terminal the major part of the signal energy comes through openings in the building such as windows. Typically, only one of the sides in a room has windows, and seldom does a room have windows on all sides. Hence, the dominating signal can be expected to arrive at the mobile terminal from a narrow range of angl...

Abstract: This paper describes the development and the realization of an adaptive antenna based on a reconfigurable parasitic structure. The geometry of the proposed antenna is circular, and it is composed by an active omni-directional radiator, surrounded by a number of parasitic elements that can be optically activated and configured as a director or as a reflector. The optical switches are a...

In this article, we propose a hybrid electromechanical scanning lens antenna array architecture suitable for the steering of highly directive beams at submillimeter wavelengths with field-of-views (FoV) ±25°. The concept relies on combining electronic phase shifting sparse mechanical translation array. use sparse-phased significantly simplifies RF front-end (number active components, routing, t...

Antennas are an indispensable element in wireless networks. For long-distance communication, antenna gains need to be very strong (highly directive) because the signal from loses a lot of strength as it travels over long distances. This is true military with missile, radar, and satellite systems, etc. Antenna arrays commonly employed focus electromagnetic waves certain direction that cannot ach...