| 摘要 |
<p>The present invention provides a filter for achieving a small, low cost filter means for high-power applications. This is achieved by providing a filter comprising a first and a second signal port (101, 102) arranged to pass signals of said first frequency band and at least a first ground plane means. Said filter further comprises an elongated conductor (111) coextending substantially in parallel with said ground plane means providing a first signal path for said frequency band between said first and second ports, at least a first conductive segment (107) having first radio frequency characteristics and being connected to said signal path at a first interconnection point and where said first characteristics and the position of said first interconnection point being selected such that radio frequencies outside said first frequency band are effectively attenuated in said first signal path. Said filter is characterized in that said elongated conductor and said conductive segment are formed partly by a planar dielectric material, having a relative dielectric constant substantially greater than one, provided with a conductive pattern, and partly by a self supporting conductor, said first interconnection point and said ground plane means being separated by a dielectric in the form of a gas.</p> |
