Integrated filter balun
AssigneeAgilent Technologies, Inc.
InventorMichael L. Frank
Life of this patent
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Abstract
A component that includes a first structure that is integrated with a second structure. The first structure is a lumped balanced to unbalanced circuit (balun) and the second structure is a resonator-based filter. The function of the balun is to move a signal from a differential form to a single ended form or from a single ended form to a differential form. The component has an area that is comparable to the area needed to implement the balun alone. However, the component now provides a filter function. Preferably, the substrate of the first structure also acts as a substrate for the second structure.
Claims17
A component comprising:
- a) a filter that includes a single ended input and a single ended output;
- b) a balanced to unbalanced circuit (balun) that includes a single ended port directly coupled to the single ended output of the filter and a differential port;
- wherein the balun is integrated with the filter.
A component comprising:
- a) a filter that includes a differential input and a differential output;
- b) a balanced to unbalanced circuit (balun) that includes a single ended port and a differential port;
- wherein the balun is integrated with the filter.
A component comprising:
- a) a first terminal for receiving a single-ended input;
- b) a second terminal and a third terminal for providing a differential output;
- c) a first structure that includes a first electrode coupled to the first terminal and a second electrode;
- and
- d) a second structure that includes a first electrode coupled to the second electrode of the first structure and a second electrode that is coupled to the second terminal and a third electrode that is coupled to the third terminal;
- wherein the second structure is integrated with the first structure;
- wherein the first structure is a balanced to unbalanced circuit (balun) and the second structure is a filter.
Dependencies are inferred from the claim text.