Multiplexer
US12375186B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2022 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Dec 7, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/72
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A multiplexer includes a common terminal, first and second transmit filters, and a first receive filter connected to the common terminal and each including resonators, a relationship Tx1c<Rx1c<Tx2c is satisfied, where Tx1c, Tx2c, and Rx1c denote center frequencies of pass bands Tx1, Tx2, and Tx3 of the first and second transmit filters and the first receive filter, respectively, a resonator closest to the common terminal in the first receive filter is a series arm resonator, and a pitch ratio denoted by pS1 (Rx1)/p(Tx2) is more than about 1 and less than or equal to about 1.035, where p(Tx2) denotes an electrode finger pitch of an IDT electrode in a resonator closest to the common terminal in the second transmit filter and pS1 (Rx1) denotes an electrode finger pitch of an IDT electrode of the series arm resonator closest to the common terminal in the first receive filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.