| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a two-wave shared sleeve antenna which can provide an excellent electrical characteristic even though the sleeve antenna is excellent in productivity with relatively simple structure. <P>SOLUTION: The two-wave shared sleeve antenna is provided with a feeding line 32 formed of a coaxial semi-rigid cable, a choke 33 for leakage current prevention which is connected to an external conductor of the feeding line 32 and has a length corresponding to the wavelength of a first target frequency, a sleeve 35 for a second target frequency attached coaxially to the head position of the feeding line 32 with prescribed spacing from the choke 33 and connected to the external conductor of the feeding line 32, and a radiation element part 36 which is connected to the center conductor of the feeding line 32 at the head position and forms two types of resonance patterns 36b and 36c for the first and second target frequencies on a substrate 36a. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
