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This paper continues the discussion of the design of an antenna with collinear electric- and magnetic-dipole moments out of phase by approximately π/2 (90°). Using a high-Q approximation, a switched oscillator is matched to the antenna for radiating an oscillatory pulse.
The geometry analyzed in this paper consists of a metallic prolate spheroid coated with confocal spheroidal layers of lossless materials whose refractive indexes are either equal (isorefractive) or opposite in sign (anti-isorefractive) to the refractive index of the medium surrounding the structure. The primary source is an electric dipole located on the axis of symmetry and axially oriented. The...
In this paper, we propose a phased array antenna which consists of crossed dipole antenna with a reflector as an element antenna. The element antenna is designed by optimizing its parameters. The main and cross polarization characteristics of the right and left side beam scanning of the fabricated 19-element array antenna is measured. Next, the experimental results of the beam scanning characteristics...
This paper presents fundamental investigation of the validity of the homogeneous tissue-equivalent phantom which is simulated human tissue structures simply and is used in general experiment for evaluations of interaction between the human body and the antenna characteristics. In this paper, the dependence of antenna characteristics on structure of analytical model was investigated. Therefore the...
This paper describes various miniaturization techniques of multiband antennas for portable transceivers. The considered techniques include folding, meandering and wrapping of the primary radiator. In addition, utilization of ground slots to widen the existing or generate new bands is described. These techniques are illustrated through design examples. Finally, a wideband antenna created by wrapping...
A new invention of wine closure is introduced. By means of this closure, a UHF RFID application for a bottle packaged wine product detection is realized. The application is realized by designing a tag based on a meander line dipole antenna, according to the shape of the new wine closure, so that the tag can be inserted into the closure with good radiation performance. Moreover, this is the first RFID...
A base station antenna for WCDMA band (1.920-2.170 GHz) application utilizing an electromagnetic gradient surface (EGS) is proposed. The EGS is applied as a reflector of 4×2 dipole array to tilt the beam with electrically without phase shifters on low-profile structure. Therefore the beam can be tilted with lower complexity, smaller size, and cheaper cost compared to conventional mechanical or electrical...
A novel wideband polarization diversity antenna that is capable of exciting two orthogonal conical radiation patterns is presented. The antenna consists of four magneto-electric dipoles arranged in a ring configuration above a ground plane and a vertical electric monopole at the center of the ground plane. A matching network is used to combine the signals from the four magneto-electric dipoles to...
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