Samsung patents filter that splits radio signals using sound waves
Samsung has filed a patent for a diplexer, a component that splits radio frequency signals into different frequency bands. The design uses acoustic resonators, which vibrate to filter specific frequencies, combined with standard electronic filters to separate lower and higher signal bands.
In the filing’s own words
A diplexer is provided. The diplexer includes a first terminal configured to be connected with an external radio frequency (RF) signal path of the diplexer, a second terminal electrically connected with the first terminal via an internal first RF signal path of the diplexer, a third terminal electrically connected with the first terminal via an internal second RF signal path, a first filter circuit configured to form at least a portion of the first RF signal path and pass signals in a first frequency band lower than a first specified frequency, and a second filter circuit configured to form at least a portion of the second RF signal path and pass signals in a second frequency band higher than a second specified frequency, wherein the first filter circuit includes a first acoustic resonator configured not to pass a third frequency band, and a first inductor and capacitor (LC) filter connected in series with the first acoustic resonator and configured to pass a frequency band lower than the first specified frequency, wherein the second filter circuit includes a second acoustic resonator configured not to pass a fourth frequency band, and a second LC filter connected in series with the second acoustic resonator and configured to pass a frequency band higher than the second specified frequency, and wherein the first specified frequency is a frequency lower than the second specified frequency.
What exactly they claim (claim 1)
1. A diplexer, comprising: a first terminal configured to be connected with an external radio frequency (RF) signal path of the diplexer; a second terminal electrically connected with the first terminal via an internal first RF signal path of the diplexer; a third terminal electrically connected with the first terminal via an internal second RF signal path; a first filter circuit configured to form at least a portion of the first RF signal path and pass signals of a first frequency band lower than a first specified frequency; and a second filter circuit configured to form at least a portion of the second RF signal path and pass signals of a second frequency band higher than a second specified frequency, wherein the first filter circuit includes: a first acoustic resonator configured not to pass a third frequency band, and a first inductor and capacitor (LC) filter connected in series with the first acoustic resonator and configured to pass a frequency band lower than the first specified frequency, wherein the second filter circuit includes: a second acoustic resonator configured not to pass a fourth frequency band, and a second LC filter connected in series with the second acoustic resonator and configured to pass a frequency band higher than the second specified frequency, and wherein the first specified frequency is a frequency lower than the second specified frequency.
Facts
- Company
- Samsung (Samsung Electronics Co., Ltd.)
- Official title
- DIPLEXER AND ELECTRONIC DEVICE INCLUDING SAME
- Publication number
- US20260322409A1
- Application number
- 19685859
- Filed
- May 22, 2026
- Published
- Oct 15, 2026
- Inventors
- 6
- Claims
- 20
Classified under
H04B 1/0057 Electricity & electronicsH03H 9/02 Electricity & electronicsH04B 1/40 Electricity & electronicsMore from Samsung in Chips & hardware
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.