Filter apparatus is provided including a filter body in which one or more resonating means (10) are formed. A support member (6) is provided for location over at least a part of one face of the said filter body. At least one transmission line (14) is provided for transmitting one or more radio frequency signals ther...

Apparatus is provided for allowing radio frequency selectivity for use in a wireless communication system for the passage of one or more receiving and/or transmission frequency signals therethrough. The apparatus includes at least a first set of first and second 90 degree phase shift coupling means and at least one ...

Combiner filter apparatus is provided for use in a wireless communication system. The apparatus includes first filtering means and at least second filtering means. An end of the first filtering means is multiplexed to an end of the at least second filtering means to allow connection of the apparatus to a common ante...