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Samsung patents power amplifier design for 5G devices

Samsung has filed a patent for a Doherty power amplifier, a circuit used to boost signal strength in wireless devices. The design uses two amplifiers and a four-port coupler to manage how electrical signals are sent, adjusting the load impedance depending on whether the second amplifier is active.

Why it mattersThis is a routine hardware improvement aimed at making 5G communication more efficient by optimizing how power is used in the transmitter.

In the filing’s own words

The disclosure relates to a pre-5 th -Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4 th -Generation (4G) communication system such as Long-Term Evolution (LTE). A Doherty power amplifier of a wireless communication system is provided. The Doherty power amplifier includes a first power amplifier, a second power amplifier, a first transmission line, a 4-port coupler, and a load impedance, and the 4-port coupler includes a first port, a second port, a third port, and a fourth port, the first power amplifier is coupled with the 4-port coupler through the first port, the second power amplifier is coupled with the 4-port coupler through the fourth port, the load impedance is coupled with the 4-port coupler through the third port, the first transmission line is disposed between the first power amplifier and the first port of the 4-port coupler, and the second port is an output end of the power amplifier.

What exactly they claim (claim 1)

1. A power amplifier comprising: a first power amplifier; a second power amplifier; a first transmission line; a load impedance for an impedance for the first power amplifier; and a coupler electrically connected with the first power amplifier via the first transmission line, and electrically connected with the second power amplifier and the load impedance, wherein, in case that the second power amplifier does not operate, the impedance has a first value determined based on a modulation ratio of the impedance, and wherein, in case that the second power amplifier operates, the impedance has a second value different from the first value.

Facts

Company
Samsung (Samsung Electronics Co., Ltd.)
Official title
POWER AMPLIFIER USING COUPLER AND ELECTRONIC DEVICE INCLUDING THE SAME
Publication number
US20260291443A1
Application number
19686022
Filed
May 22, 2026
Published
Sep 24, 2026
Inventors
8
Claims
20

Classified under

H03F 1/0288 Electricity & electronicsH03F 1/565 Electricity & electronicsH03F 3/24 Electricity & electronicsH03F 3/602 Electricity & electronicsH03F 3/211 Electricity & electronicsH03F 2200/198 Electricity & electronics
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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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.