Patent ID: 6975181

Claim:
A duplexer filter of resonator loaded cavities for transmitting and receiving signals to and from a device comprising: a first electrical connector for transmitting and receiving signals; a second electrical connector for passing a signal from the device to said first electrical connector; a third electrical connector for passing a signal to the device from said first electrical connector; a first filter of at least three resonator loaded cavities coupled between said first and second electrical connectors to allow exchange of a desired frequency between said first and second electrical connectors, wherein each of said cavities is loaded with a resonator; and a second filter of at least three resonator loaded cavities coupled between said first and third electrical connectors to allow exchange of a desired frequency between said first and third electrical connectors, wherein each of said cavities is loaded with a resonator; wherein said first filter is stacked in relation to said second filter, as opposed to being positioned side-by-side each other; wherein side-by-side positioning of said cavities is relative to the sides of the resonators, and wherein stacking of said cavities is relative to tops and bottoms of said cavities; wherein each of said first and second filter each include at least four resonator loaded cavities coupled side by side in at least a two-by-two matrix.