Patent ID: 6225959
Filing Date: 2001-05-01
Classification: H01Q

Abstract:
A dual frequency cavity backed slot antenna comprising:(a) a plurality of stacked layers including a layer having a substrate with a surface, said surface including thereon:(i) a continuous slot;(ii) first electrically conductive metallization disposed internal of said slot and extending to said slot;(iii) second electrically conductive metallization disposed external to said slot and extending to said slot, said first and second electrically conductive metallization defining said slot; and(iv) at least one pair of axially aligned frequency adjusting means, said pair of frequency adjusting means comprising:(a) a first tab or indentation forming a part of said first electrically conductive metallization; and(b) a second tab or indentation forming a part of said second metallization and axially aligned with said first tab or indentations;(c) at least part of at least one of said first or second tab or indentation including a separate trimmable electrically conductive layer secured to its associated metallization.