Title:
FRONT-END CIRCUIT, FRONT-END MODULE, COMMUNICATION DEVICE, AND MULTIPLEXER
Document Type and Number:
WIPO Patent Application WO/2019/176538
Kind Code:
A1
Abstract:
A broadband filter that allows passage of both a received frequency band of a first communication frequency band and a received frequency band of a second communication frequency band adjacent to or overlapping with the received frequency band of the first communication frequency band; a transmission filter that allows passage of a transmission frequency band of the first communication frequency band or a transmission frequency band of the second communication frequency band; and switches (SW1, SW2, SW3) that can make at least two filters of a plurality of filters including the broadband filter and the transmission filter simultaneously conductive are provided. The switches (SW1, SW2, SW3) make the broadband filter and the transmission filter simultaneously conductive in a case when carrier aggregation is performed between the received frequency band of the fist communication frequency band and the received frequency band of the second communication frequency band. This prevents signal attenuation due to leakage of signals of two received frequency bands in adjacent frequency bands in the case of performing the carrier aggregation in which signals of a plurality of communication frequencies are simultaneously communicated.
Inventors:
NAGAMORI HIROYUKI (JP)
KANEDA AKIO (JP)
MURANAKA HIROSHI (JP)
TSUKAMOTO HIDEKI (JP)
ITO DAISUKE (JP)
SAKANO KIWAMU (JP)
MIYAZAKI DAISUKE (JP)
KANEDA AKIO (JP)
MURANAKA HIROSHI (JP)
TSUKAMOTO HIDEKI (JP)
ITO DAISUKE (JP)
SAKANO KIWAMU (JP)
MIYAZAKI DAISUKE (JP)
Application Number:
PCT/JP2019/007498
Publication Date:
September 19, 2019
Filing Date:
February 27, 2019
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H04B1/00; H04B1/18; H04B1/52
Domestic Patent References:
| WO2017199649A1 | 2017-11-23 | |||
| WO2017138539A1 | 2017-08-17 | |||
| WO2013041146A1 | 2013-03-28 |
Foreign References:
| JP2000261345A | 2000-09-22 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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