Front-End Circuit for Simultaneous Transmission and Reception Operation

A front end circuit is disclosed. In an embodiment, the circuit includes a first antenna connection and first to third signal paths, each of which include a tunable filter and each of which is connected to the first antenna connection. The circuit further includes at least one phase shifter arranged...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Ellä Juha, Schmidhammer Edgar
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS RESONATORS TRANSMISSION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	A front end circuit is disclosed. In an embodiment, the circuit includes a first antenna connection and first to third signal paths, each of which include a tunable filter and each of which is connected to the first antenna connection. The circuit further includes at least one phase shifter arranged in at least one of the signal paths between a respective filter and the first antenna connection and a control circuit configured to tune frequency bands of the filters, wherein the filters are operable in a FDD operating mode or a TDD operating mode, and wherein the front-end circuit is simultaneous operable in at least one transmission band and at least one reception band using all three filters and the associated signal paths.