Abstract: Certain aspects of the present disclosure generally relate to an electronic device having an inductive element made up of a plurality of metal layers including a metal shielding layer with one or more electrically floating metal pieces. One example electronic device has a plurality of metal layers that generally includes a bottom metal layer, one or more middle metal layers disposed above the bottom metal layer, wherein at least one of the middle layers comprises a coil, and a top metal layer disposed above the one or more middle metal layers. At least one of the bottom metal layer or the top metal layer comprises a shield layer. At least a first portion of a first region of the shield layer overlying or underlying the coil comprises one or more metal pieces that are electrically floating and are disconnected from the shield layer.

Abstract: A quadplexer providing improved insertion loss and pass band steepness is provided. The quadplexer comprises a first filter structure with a first filter element, a second filter structure with a second filter element and an inductive element that is electrically connected in series between common ports of the filter structures and input ports of the filter elements.

Abstract: A quadplexer providing improved insertion loss and pass band steepness is provided. The quadplexer comprises a first filter structure with a first filter element, a second filter structure with a second filter element and an inductive element that is electrically connected in series between common ports of the filter structures and input ports of the filter elements.

Abstract: A filter circuit providing improved attenuation, a filter having improved attenuation and a duplexer with improved isolation are provided. The filter circuit has a first and a second coupling conductor segment which couple an input port to a ground port or the filter's output port. The filter circuit can be realized in the filter. The duplexer can comprise the filter, especially as its transmission filter.

Abstract: A filter circuit providing improved attenuation, a filter having improved attenuation and a duplexer with improved isolation are provided. The filter circuit has a first and a second coupling conductor segment which couple an input port to a ground port or the filter's output port. The filter circuit can be realized in the filter. The duplexer can comprise the filter, especially as its transmission filter.