Advanced Phased-Array Transceiver Technologies for 5G Communications

Advanced phased-array transceivers lie at the heart of 5G wireless systems, enabling dynamic beam steering, high spectral efficiency and robust multi-user connectivity at millimetre-wave frequencies. By integrating arrays of antenna elements with phase-shifting networks, low-noise amplifiers and mixers on a single chip or module, these systems achieve rapid electronic beam steering without mechanical parts. Key innovations include built-in calibration loops to correct phase and amplitude mismatches across large arrays, multi-band front-ends covering the entire 5G New Radio FR2 spectrum (24–71 GHz), and hybrid analogue–digital beamforming architectures that trade off between cost, power consumption and array size. Dual-polarised beamforming and harmonic-selection techniques further enhance capacity and interference tolerance in dense urban deployments. Such transceivers deliver high effective isotropic radiated power (EIRP), tight error vector magnitude (EVM) specifications for high-order modulation and noise figures suited to wideband operation. Collectively, these technologies underpin 5G base stations, fixed wireless access terminals and emerging satellite backhaul links, driving global deployment of ultra-high-throughput, low-latency networks.

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One significant development is a 39 GHz 64-element phased-array transceiver chipset implemented in 65 nm CMOS. The design features on-chip phase-to-digital conversion and high-resolution phase detection, achieving phase and amplitude calibration errors below 0.1° rms and 0.01 dB rms respectively. The module supports 256-QAM OFDMA at 400 MHz bandwidth with a measured EIRP of 53 dBm and per-chain power consumption of 1.5 W in transmit mode.

Another approach introduces a 28 GHz dual-polarised beamformer utilising a neutralised bi-directional architecture to share circuitry between transmit and receive paths. Implemented in standard CMOS, each element achieves a noise figure of 4.2 dB and saturated output power of 15.1 dBm, while 32-element sub-arrays deliver up to 45.6 dBm EIRP and support 15 Gb/s single-carrier links with 256-QAM modulation.

More recently, a multi-band phased-array receiver covering 24–71 GHz employs a novel harmonic-selection mixer to isolate desired bands and a configurable transformer-based LNA for broad bandwidth with low power. Fabricated in 65 nm CMOS, the receiver maintains noise figures below 3.5 dB across key 5G FR2 sub-bands, offers over 36 dB inter-band blocker rejection and supports 400 MHz OFDMA channels up to 256-QAM with sub-30 dB EVM.

Advanced Phased-Array Transceiver Technologies for 5G Communications publication trend

The graph below shows the total number of articles in advanced phased-array transceiver technologies for 5g communications across all publications each year (not limited to Nature Index journals).

Technical terms

Phased-array transceiver: A radio front-end that combines multiple antenna elements with programmable phase shifts to form steered beams.

Beamforming: The process of adjusting the relative phases and amplitudes of signals across an antenna array to direct radiation in desired directions.

Phase calibration: A control mechanism that measures and corrects phase and amplitude mismatches among array elements to preserve beam integrity.

Effective isotropic radiated power (EIRP): The equivalent power a transmitter would need to emit isotropically to achieve the same signal strength in the beam direction.

Noise figure (NF): A measure of the degradation in signal-to-noise ratio introduced by a component or system.

Multiple-input multiple-output (MIMO): A communication technique using multiple transmit and receive antennas to improve capacity and resilience.

References

1. A 39-GHz 64-Element Phased-Array Transceiver With Built-In Phase and Amplitude Calibrations for Large-Array 5G NR in 65-nm CMOS. IEEE Journal of Solid-State Circuits (2020).
2. A 28-GHz CMOS Phased-Array Beamformer Utilizing Neutralized Bi-Directional Technique Supporting Dual-Polarized MIMO for 5G NR. IEEE Journal of Solid-State Circuits (2020).
3. A Power-Efficient CMOS Multi-Band Phased-Array Receiver Covering 24–71-GHz Utilizing Harmonic-Selection Technique With 36-dB Inter-Band Blocker Tolerance for 5G NR. IEEE Journal of Solid-State Circuits (2022).