Dielectric antenna and material for the same

#This invention relates to a dielectric antenna, and particularly to improvement of a dielectric block provided in the dielectric antenna in terms of a material.

#In recent years, mobile phones have been increasingly reduced in size and weight and accordingly, reduction in size and weight has also been required for antennas mounted on mobile phones. In the mobile phone, a dielectric antenna, the body part of which is formed with a dielectric block, is usually used, and for keeping up with the reduction in size and weight described above, a dielectric material used for the dielectric block is desired to have a high dielectric constant and a low specific gravity.

#On the other hand, antenna built-in mobile phones are mainstream from the viewpoint of designability of mobile phones. The antenna built-in type also contributes to downsizing of mobile phones. Consequently, a dielectric antenna is required which has such excellent processability that the shape of its dielectric block can be flexibly changed so that the dielectric antenna can be placed in a narrow space such as a gap between a main frame of a mobile phone and a wiring board within the main frame.

#FIG. 1 is a perspective view showing an external appearance of a dielectric antenna 1 according to one embodiment of this invention.

#First, the structure of a dielectric antenna 1 according to one embodiment of this invention will be described with reference to FIG. 1.

#The dielectric antenna 1 includes a dielectric block 2 in the shape of, for example, a rectangular parallelepiped, which forms a body part thereof.

#A radiation electrode 3 is provided on a dielectric block 2. The radiation electrode 3 has a main part 4 extending on a main surface of the dielectric block 2, and first and second draw parts 5 and 6 drawn from the main part 4 and extending on a side surface of the dielectric block 2.