| 摘要 |
A J-pole type antenna (10) with radiating elements (14 and 16) comprising a substantially rectilinear antenna element (14), a coupled counterpoise conductor (16), an rf feed (12) and dielectric resonators (18 and 20) is disclosed. The invention enables passive tuning without mechanical parts and movements thereof to change frequency. The dielectric resonators are strategically placed on the antenna element and the coupled counterpoise conductor to affect frequency changes and to yield multiband antennas preferably in the VHF and above bands. The invention also discloses a structure (22 and 25) advantageously tailored to mount and support the components of the J-pole. |
