| US 7,623,005 B2 | ||
| Filter combiner | ||
| Rune Johansson, Upplands Vasby (Sweden); and Daniel Källberg, Bromma (Sweden) | ||
| Assigned to Telefonaktiebolaget L M Ericsson (Publ), Stockholm (Sweden) | ||
| Appl. No. 11/914,016 PCT Filed May 04, 2006, PCT No. PCT/SE2006/050099 § 371(c)(1), (2), (4) Date Dec. 28, 2007, PCT Pub. No. WO2006/121402, PCT Pub. Date Nov. 16, 2006. |
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| Claims priority of application No. 0501065 (SE), filed on May 11, 2005. | ||
| Prior Publication US 2008/0174385 A1, Jul. 24, 2008 | ||
| Int. Cl. H01P 5/12 (2006.01); H03H 7/46 (2006.01); H01P 1/213 (2006.01) | ||
| U.S. Cl. 333—110 [333/117; 333/126] | 13 Claims |
| 1. A filter combiner, for mobile communications applications, adapted to be connected directly or via other components to
an antenna, comprising:
a first directional coupler, connected to at least one first filter and at least one second filter, and adapted to be connected
to an antenna branch, and to a first signal branch via at least one third filter;
a second directional coupler, connected to the at least one first filter and the at least one second filter, and adapted to
be connected to a second signal branch
wherein each of the filters is one of a band pass filter type or a band reject filter type;
wherein the at least one first filter and the at least one second filter are of the same type whereas the at least one third
filter is of the other type; and,
wherein the at least one first, second and third filters are all tuned to a band between substantially the same frequencies.
|