MULTIPLEXER DEVICE WITH FIRST AND SECOND FILTERING DEVICES CONNECTED TO COMMON PORT

摘要

A multiplexer device includes at least one filtering device having at least one first band pass filter, connected to a common port via at least one series inductance, respectively, and only one or non-overlapping passbands, and at least one second filtering device, each of which includes at least one second band pass filter with a total of at least two second band pass filters are connected to the common port and having non-overlapping passbands, respectively. Combined series inductance transformed input impedance of the at least one first filtering device is inductive, when viewed from the common port, in the passbands of the at least two second band pass filters. Combined input impedance of the at least one second filtering device is substantially capacitive, when viewed from the common port, in a passband of the at least one first band pass filter in the at least one first filtering device.

主权项

1. A multiplexer device, comprising:
at least one first filtering device, each of the at least one first filtering device comprising at least one first band pass filter, connected to a common port via at least one series inductance, respectively, the at least one first band pass filter having only one or non-overlapping passbands; and at least one second filtering device, each of the at least one second filtering device comprising at least one second band pass filter such that a total of at least two second band pass filters are connected to the common port, the at least two second band pass filters having non-overlapping passbands, respectively, wherein combined series inductance transformed input impedance of the at least one first filtering device is inductive, when viewed from the common port, in the passbands of the at least two second band pass filters connected to the common port, and wherein combined input impedance of the at least one second filtering device is substantially capacitive, when viewed from the common port, in a passband of the at least one first band pass filter in the at least one first filtering device, each second band pass filter being configured to provide a corresponding capacitive load at the common port in the passbands of the other second band pass filters of the at least two second band pass filters.