5G Active Antenna Unit (AAU) Upgrades: Industrial Growth Path Driven by Massive MIMO and Millimeter-Wave Communications

According to YHResearch, the global 5G Active Antenna Unit (AAU) market reached approximately RMB 28.92 billion in 2025. Driven by the continued expansion of 5G networks, accelerating industrial digitalization, and the rapid commercialization of high-frequency communication technologies, the market is projected to reach RMB 55.74 billion by 2032, registering a compound annual growth rate (CAGR) of 9.4% during 2026–2032. As a core component of the 5G Radio Access Network (RAN), the AAU is evolving from basic telecommunications hardware into a critical infrastructure node that supports high-capacity networks and intelligent connectivity.

1. Architectural Evolution: AAUs Reshaping 5G Base Station Design

From the perspective of communications system evolution, conventional 4G base stations adopted a separated architecture consisting of a Baseband Unit (BBU), Remote Radio Unit (RRU), and antenna, resulting in high feeder losses and larger installation footprints. In contrast, 5G AAUs integrate antenna arrays and radio frequency (RF) transceivers into a single unit, enabling compact deployment while incorporating Massive MIMO and beamforming technologies to significantly improve spectral efficiency and network coverage.

According to communication equipment operation statistics released by China's Ministry of Industry and Information Technology (MIIT) in 2025, the average capacity of a single 5G base station in major cities has increased by more than four times compared with the 4G era. The high level of AAU integration and multi-channel architecture has been one of the key technological drivers behind this improvement. Current mainstream products support 32T32R, 64T64R, and 128T128R configurations and are steadily expanding toward millimeter-wave frequency bands.

2. Key Growth Drivers: Expanding Demand Across Multiple Network Scenarios

The growth of the AAU market is primarily driven by three major factors.

First, the continued expansion of global 5G infrastructure is fueling demand. In the Asia-Pacific region, particularly in China, South Korea, and India, the density of 5G base stations continues to increase, making Massive MIMO AAUs the mainstream deployment choice.

Second, the rapid adoption of industrial Internet applications and intelligent manufacturing has significantly increased demand for enterprise private 5G networks. For example, after deploying a private 5G network based on AAUs, an automotive parts manufacturer in Eastern China reduced production line data transmission latency by approximately 35% while improving equipment collaboration efficiency by nearly 30%.

Third, the rapid growth of applications such as AR/VR, ultra-high-definition video, vehicle-to-everything (V2X) communications, and edge computing is creating stronger demand for low-latency and high-bandwidth networks, further accelerating the transition toward higher-capacity and more reliable AAU solutions.

3. Competitive Landscape: Global Industry Leaders Driving Technology Development

The global AAU market remains highly concentrated, with leading telecommunications equipment vendors dominating technological innovation and product development.

Huawei Technologies Co., Ltd., ZTE Corporation, Nokia Corporation, and Ericsson continue to strengthen their technological leadership in Massive MIMO AAUs by providing system-level solutions that enhance overall network performance.

Meanwhile, Samsung Electronics and NEC Corporation are accelerating the development of millimeter-wave and high-frequency AAU products. Chinese manufacturers such as Comba Telecom Systems Holdings Limited and CICT Mobile Communication Technology Co., Ltd. have established differentiated competitive advantages in mid- and low-frequency products through cost-effective solutions.

4. Industry Challenges: Technical Complexity and Supply Chain Constraints

Despite its strong growth prospects, the AAU industry continues to face several major challenges.

First, high-frequency RF design, multi-channel coordination, and thermal management integration require advanced engineering capabilities, placing extremely high demands on manufacturers' research and development resources.

Second, periodic shortages of key components—including semiconductors, RF chips, and filters—continue to affect production capacity and delivery schedules.

In addition, differences in spectrum allocation, certification requirements, and electromagnetic compatibility (EMC) standards across countries have increased the cost and complexity of global deployments.

Furthermore, fluctuations in telecom operators' capital expenditures (CAPEX), coupled with intense price competition, continue to put pressure on industry profitability.

5. Expanding Applications: From Public Networks to Private 5G Networks

From the downstream demand perspective, AAU applications are expanding beyond conventional public mobile networks into a wide range of industrial scenarios.

For urban macro base stations and indoor coverage networks, 32T32R and 64T64R configurations have become the mainstream choice to support high-density user traffic.

In industrial automation and smart manufacturing, the rapid deployment of private 5G networks is driving demand for AAUs with ultra-high reliability and ultra-low latency. At the same time, millimeter-wave technology is gradually being deployed in high-traffic environments such as stadiums and transportation hubs.

Moreover, the integration of Open RAN (Open Radio Access Network) and network slicing technologies is enabling modular and flexible AAU deployment, allowing AAUs to evolve from standalone communications equipment into system-level network infrastructure.

6. Future Outlook: Continuous Evolution Toward Higher Frequencies and Greater Intelligence

Overall, the AAU industry is transitioning from a growth model driven primarily by network expansion to one powered by both technological innovation and diversified application scenarios.

Future development will focus on high-frequency millimeter-wave communications, ultra-large antenna arrays, and low-power system designs.

As research into 6G technologies accelerates, AAUs are expected to evolve toward even higher frequency bands, greater integration, and intelligent self-optimization capabilities. Combined with AI-powered network optimization algorithms, future AAUs will enable dynamic beam management and energy-efficiency optimization, positioning them as one of the most critical infrastructure components for next-generation mobile communication networks.