| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the problem, wherein space required for laying feeders becomes narrow and mutual feeders are laid closer and couplings among the feeders become larger, because generally a method for rotating radiation elements is used, when polarized waves are required to be rotated in an array reference direction, even though the feeders are required to be laid on the lower sides of conductors, among slot openings in the feeders for suppressing radiation from the feeders, in a triplate-type planar antenna. <P>SOLUTION: In the triplate-type planar antenna, the slot openings are arranged so as to be directly over the radiation elements, when an antenna circuit board 3, forming the radiation elements and feeders, is mounted on a first dielectric 2a; a slot board 4, with the slot openings aiming at radio radiations, is mounted on a second dielectric 2b; and the antenna circuit board 3 is superimposed on the lower part of the second dielectric. In the triplate-type planar antenna, a polarized-wave grid board forming a polarized-wave grid inclined by an angleθin the reference direction of the array of the radiation elements and the slot openings is installed on a third dielectric, and the third dielectric is arranged at the upper part of the slot board. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
