Diplexer for dual-band Wi-Fi applications
AssigneeRichWave Technology Corp.
InventorChin-Lung Yang
Life of this patent
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Abstract
A diplexer includes a first filter circuit, and a second filter circuit. The first filter circuit is coupled to a first port for providing a first signal path for a first radio frequency (RF) signal. The second filter circuit is coupled to the first port for providing a second signal path for a second RF signal. The first filter circuit includes a first tunable resonant circuit for tuning a first transmission zero corresponding to a first frequency multiplication of the first RF signal. The second filter circuit includes a second tunable resonant circuit for tuning a first transmission zero corresponding to a first frequency multiplication of the second RF signal. The first frequency multiplication of the first RF signal corresponding to the first filter circuit is a fourth harmonic of the first RF signal.
Claims20
A diplexer comprising:
- a first port;
- a first filter circuit coupled to the first port, and configured to provide a first signal path for a first radio frequency (RF) signal, the first filter circuit comprising:
- a first tunable resonant circuit configured to tune a first transmission zero corresponding to a first frequency multiplication of the first RF signal;
- a second port coupled to the first filter circuit;
- a second filter circuit coupled to the first port, and configured to provide a second signal path for a second RF signal, the second filter circuit comprising:
- a second tunable resonant circuit configured to tune a first transmission zero corresponding to a first frequency multiplication of the second RF signal;
- and
- a third port coupled to the second filter circuit;
- wherein the first frequency multiplication of the first RF signal corresponding to the first filter circuit is a fourth harmonic of the first RF signal.
Dependencies are inferred from the claim text.