High-frequency circuit, high-frequency front-end circuit, and communication device

• Main Author: TANI MASAKAZU
• Format: Patent
• Language: Chinese; English
• Published: 17.06.2022
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS; TRANSMISSION

The invention relates to a high-frequency circuit which suppresses impedance deviation in a communication frequency band of a plurality of filters observed from an antenna terminal. In a high-frequency circuit (1), a first switch (4) is connected to an antenna terminal (2). The second switch (3) is connected to the antenna terminal (2) via the first switch (4). The first filter (6) is an elastic wave filter connected to the first switch (4) via the second switch (3), and passes a high-frequency signal in the first communication band. The second filter (7) is an elastic wave filter that is connected to the first switch (4) without passing through the second switch (3), and passes through a high-frequency signal in a second communication band higher than the first communication band. The high-frequency circuit (1) is further provided with a capacitor (8). A capacitor (8) is connected in series with the first switch (4) and the second switch (3) between the first switch (4) and the second switch (3). 本发明涉及一种高频电路