What is 5G Diplexer : Top Manufacturer Companies

A 5G diplexer is a passive RF component that combines or separates signals operating in different frequency bands while sharing a common transmission path. It is widely used in 5G base stations, antennas, distributed antenna systems (DAS) and wireless communication networks to improve spectrum utilization, reduce interference and optimize overall network performance. Diplexers play a crucial role in enabling seamless frequency management and signal routing. The popular manufacturers of diplexers for 5G applications include Qorvo, Murata, L-com etc.

Introduction

The term 5G refers to the fifth generation of wireless technologies. The standard supports frequencies in three categories: Sub-1 GHz, 1 to 6 GHz, and above 6 GHz bands in the mmWave range. The diplexer used for 5G bands is known as a 5G diplexer.

Figure 1 depicts the use of diplexers in a 5G mobile phone between the antenna array and the PA/LNA. As shown, it couples the PA (Power Amplifier) with the transmit part of the antenna array element and the LNA (Low Noise Amplifier) with the receive part of the antenna array element. This is a 5G beamforming module used in 5G FDD mode. Both LNA and PA operate on different frequencies.

In 5G TDD mode, SPDT switches and filters are used in place of diplexers due to operation at a single frequency and different time instants.

The other applications of RF diplexers are shown in Figure 2. As shown, it can be used along with a dual-band radio as well as a dual-band antenna. In a dual-band radio, it separates a received dual-frequency signal into two separate signals with unique frequencies, such as 2.4 GHz and 4.9/5 GHz. These separated RF signals are transmitted using two antennas as shown. In a dual-band antenna, it combines the two different frequencies to be transmitted from two radios. The combined signal is relayed using a dual-band antenna.

5G Diplexer Manufacturers & Vendors

The following table lists manufacturers or vendors of 5G diplexers.

Manufacturers	Description
National Astronomical Observatory of Japan, Tokyo	Researchers have developed a waveguide diplexer which works from 275 GHz to 500 GHz frequency range. It uses two different hybrid couplers in order to combine/divide two LO signals.
Murata Manufacturing Co., Ltd.	It offers dual-band diplexers which can be used for 2450 +/- 50MHz and 5425 +/- 525 MHz frequency bands. It is used for sub 6GHz 5G applications. Visit Website: https://www.murata.com/
L-com, Inc.	Model number DP245-NF diplexer supports dual bands. It is designed to separate 2.4 GHz and 5 GHz received from a single radio output. The separated 2.4GHz and 5GHz signals are fed to two separate antennas.
Qorvo, Inc	It offers RF diplexers for lower 5G bands with its advanced BAW/SAW filter technologies.
AVX Corporation	The company offers 0805 MLO™ series of diplexers used for various wireless standards.

Conclusion

5G diplexers enable efficient frequency band management in modern wireless infrastructure, with leading manufacturers providing high performance solutions for telecom networks, base stations, small cells and advanced RF communication systems. By choosing reliable manufacturers, industries can enhance their 5G deployments with robust and efficient diplexer solutions.