Title:
HIGH FREQUENCY CIRCUIT, HIGH FREQUENCY FRONTEND CIRCUIT, AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/100259
Kind Code:
A1
Abstract:
The present invention suppresses variations of impedance, seen from an antenna terminal, for the communication bands of a plurality of filters. In a high frequency circuit (1), a first switch (4) is connected to an antenna terminal (2). A second switch (5) is connected to the first switch (4) and further connected to the antenna terminal (2) via the first switch (4). First filters (6) each are connected to the first switch (4) without intervention of the second switch (5) and pass a high frequency signal of a first communication band therethrough. Second filters (7) each are connected to the first switch (4) via the second switch (5) and pass a high frequency signal of a second communication band higher than the first communication band therethrough. The high frequency circuit (1) further comprises an inductor (8). The inductor (8) is not series connected to the first filters (6) and is series connected to the first switch (4) and to the second switch (5) between the first switch (4) and the second switch (5).
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Inventors:
TANI MASAKAZU
Application Number:
PCT/JP2020/029779
Publication Date:
May 27, 2021
Filing Date:
August 04, 2020
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H7/38; H04B1/00; H04B1/40
Domestic Patent References:
| WO2019054176A1 | 2019-03-21 | |||
| WO2019004152A1 | 2019-01-03 | |||
| WO2018212048A1 | 2018-11-22 |
Foreign References:
| JP2018026795A | 2018-02-15 | |||
| JP2019068205A | 2019-04-25 |
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (JP)
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