Patent ID: 6518855
Filing Date: 2003-02-11
Classification: H03K,H04B

Abstract:
A microwave circuit configuration, comprising:a plurality of semiconductor switching elements each having a drain, a source, and a gate, said semiconductor switching elements being switchable complementarily with respect to one another and being configured to switch between at least two antennas, at least two transmitters, and at least two receivers, wherein the transmitters and the receivers operate on mutually different frequency bands; at least two of said semiconductor switching elements being galvanically decoupled from one another, wherein one of said at least two semiconductor switching elements is driven by alteration of the drain and source potentials, and another of said at least two semiconductor switching elements is driven by alteration of a gate potential; a first terminal, a second terminal, a terminal for a first transmission frequency band, a terminal for a second transmission frequency band, a terminal for a first reception frequency band, a terminal for a second frequency band, a terminal for a first antenna, and a terminal for a second antenna; a first switch connected to said first terminal, said first switch changing over between said terminal for the first transmission frequency band and said terminal for the second transmission frequency band; a second switch connected to said first terminal, said second switch changing over between said terminal for the first antenna and said terminal for the second antenna; a third switch connected to said second terminal, said third switch changing over between said terminal for the second antenna and said terminal for the first antenna, wherein said second switch and said third switch are each connected to different antennas; and a fourth switch connected to said second terminal, said fourth switch changing over between said terminal for the first reception frequency band and said terminal for the second frequency band; wherein the circuit has three circuit states, including: a first circuit state in which said first switch is connected to said terminal for the first transmission frequency band, said second switch is connected to said terminal for the first antenna, said third switch is connected to said terminal for the second antenna, and said fourth switch is connected to said terminal for the second reception band; a second circuit state in which said first switch is connected to said terminal for the second transmission frequency band, said fourth switch is connected to said terminal for the first reception frequency band, said second switch is connected to said terminal for the first antenna, and said third switch is connected to said terminal for the second antenna; and a third circuit state in which said first switch is connected to said terminal for the second transmission frequency band, said fourth switch is connected to said terminal for the first reception frequency band, said second switch is connected to said terminal for the second antenna, and said third switch is connected to said terminal for the first antenna.