| 摘要 |
PROBLEM TO BE SOLVED: To arrange a rib 3 in the tube of a boom, fix the root portion side of the rib 3 to a tube wall 4, make the tip side 3b of the rib 3 a free end and fix an antenna element to the boom by bending the tip side 3b of the rib 3 to the antenna element with a relatively weak force. SOLUTION: A hollow tube-like antenna element is penetrated through a hollow boom, recessed portions are formed on both sides of the peripheral surface of a part placed in the boom tube of the antenna element, respectively, ribs 3 are provided on the both sides of the antenna element in the tube of the boom, root sides of each rib 3 are fixed to the tube wall 4 of the boom, respectively, the free end sides of each rib 3 are abutted on the recessed portions formed on the both sides of the tube wall 4 of the antenna element, and the antenna element is fixed to the boom in the state that the antenna element is held from the both sides thereof. COPYRIGHT: (C)2004,JPO&NCIPI
|
