National Institute of Information and Communications Technology, Incorporated

Kamya Yekeh Yazdandoost

Ryuji Kohno

The wideband L-loop antenna is presented in this invention. It has excellent performance for lower band of UWB system and has the attractive features of small size, inexpensive, and easy to design. The antenna composed of a single metallic layer is printed on the top of a substrate and a coupled tapered transmission line is printed on the top of the same substrate. A L shape portion is formed by widening partially or wholly the width of a part of antenna elements in comparison with the other part.

Ultra wideband loop antenna

A slot antenna includes an insulation substrate, a metal layer provided on the insulation substrate, a slot formed in the metal layer, and a feeding part connected to the metal layer. The slot is symmetric with respect to a centerline. When an x-y coordinate system is defined on the metal layer so that the y-axis is the symmetric line, the origin is the center of the slot antenna, and the x-axis through the origin is perpendicular to the y-axis, the width of the slot in the direction of the y-axis increasing in proportion to the absolute value of the x-axis.

Ultra wideband bow-tie slot antenna

A printed antenna includes a dielectric substrate having a pair of printed antenna elements to form a dipole antenna. On an antenna plane, an xy axis system is defined so that an origin is defined at a center of location of the antenna elements, and an x axis is set in a direction that the antenna elements are arranged, a y axis is set in the direction perpendicular to the x axis, and a size of the antenna elements in the direction of the y axis become gradually larger according to the x axis changing in an outer direction. Each of the antenna elements has an impedance matching part at a feeding side of the antenna elements. The printed antenna can be used in an ultra wide-band frequency, and is small profile, is light weight and low in cost.

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Tokyo, Japan

Kamya Yekeh Yazdandoost