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In this paper, the low-profile radiation-pattern controllable antenna is presented. The diskloaded monopole antenna (DLMA) with four slits is designed for low-profile radiation element. And, planar CRLH-PE composited of the mushroom structures is designed. It is cleared that the DLMA and the CRLH-PE with the height of 0.03λ at 750 MHz can couple each other. The radiation patterns can be controlled...
A simplified method for measuring the specific absorption rate (SAR) is required in order to limit the spatial-average SAR for mobile devices in Japan. In this paper, a simplified SAR measurement method involving the use of a flat-plane lightweight phantom composed of a radio wave absorber is proposed. The utility of the lightweight phantom and the feasibility of using the proposed measurement method...
The pattern-controllable novel small antenna with CRLH-PE has been proposed. The distance between the radiator and the parasitic element of the proposed antenna is 1/20 of wave length. The directivity in arbitrary direction is obtained by resonation of an appropriate PTLH-PE in the usable frequency band of the dipole antenna. The minimization of the radiator is future study.
In this study, a composite right-/left-handed transmission line (CRLH TL) is used as a parasitic element. It is shown that a right-handed (RH) dipole antenna with the CRLH parasitic element has band rejection characteristics. Moreover, transmission characteristics and electric field distribution confirm that mutual coupling between the two dipole antennas can be reduced by using CRLH parasitic elements...
A stub-loaded folded dipole antenna is proposed for digital terrestrial TV reception. The antenna has a pair of lines as stubs inside a folded dipole. The prototype antenna printed on polyethylene terephthalate (PET) film has dimensions of 20 by 240mm with a line width of 1 mm. The antenna exhibits a relatively flat gain characteristic from 0.6 to 1.9 dBi with a stable figure-of-eight radiation pattern...
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