How relevant are passive antennas in the age of massive MIMO?

Over the three decades I have been involved in the base station antenna industry, I have seen many trends emerge and, in some cases, fade away. Some readers may remember log-periodic antennas, circularly polarized antennas, or even antennas with adjustable azimuth beamwidths.

Few innovations, however, have had as much impact on network design as massive MIMO (mMIMO). With its ability to create focused beams and dynamically allocate resources across the served sector, mMIMO has fundamentally changed how operators think about network performance.

It also raises an important question:

Is there still a place for passive antennas in today's mobile networks?

The answer is yes.

But just as mMIMO technology has evolved to improve network performance, passive antennas have evolved as well. Today's most advanced passive antennas are no longer designed simply around antenna specifications such as gain and beamwidth. Instead, they are increasingly engineered around the metrics that matter most to operators: network capacity, coverage, signal quality and user experience.

Why network performance matters more than antenna specifications

Historically, antenna selection has often focused on traditional specifications such as gain, azimuth beamwidth and port count.

Today, mobile network operators face a different set of challenges. Mobile traffic continues to grow, while site acquisition, permitting, tower loading and deployment costs make network expansion increasingly complex and expensive.

As a result, operators are looking for ways to extract more performance from existing infrastructure before investing in costly upgrades.

This shift means success is increasingly measured through network-level KPIs such as:

• SINR
• Throughput
• Spectral efficiency
• Coverage performance
• Overall network capacity

 

The question is no longer simply, "What antenna has the highest gain?" but rather, "Which antenna helps me deliver the best network performance?" That shift in thinking is exactly what drove the development of PerforMax®.

At ANDREW, PerforMax® is one example of how continued innovation in passive antenna design is helping operators address these new network challenges.

Rather than evaluating success through antenna specifications alone, the design process examines how antenna patterns influence real-world network performance.

In particular there are two primary ways in which the design process has evolved.

First, it incorporates ANDREW's SEED® (Sustainable Energy Efficient Design) technology, which reduces insertion loss within the antenna feed network and improves overall radiation efficiency. This allows more of the transmitted energy to be effectively delivered where it matters most: across the network.

Second, PerforMax is designed using advanced 3D pattern optimization techniques and network-level modelling tools. Rather than focusing solely on antenna specifications, the design process evaluates how antenna patterns influence real-world network performance.

In other words, PerforMax was designed to improve cellular network capacity, wireless network coverage and overall network performance, rather than simply optimize antenna-level specifications.

Delivering measurable network gains

By combining SEED® technology with advanced pattern optimization, PerforMax helps operators improve key network performance indicators, delivering benefits such as:

• Up to 20% network capacity improvement
• Up to 20% coverage extension
• Up to 1.2 dB SINR improvement
• Higher spectral efficiency
• Better overall user experience

 

Most importantly, these gains can often be achieved while maximizing the value of existing infrastructure.

In an environment where every site upgrade requires significant investment, the ability to unlock additional capacity and coverage from existing cell sites can help operators delay costly network expansion while continuing to meet growing traffic demands.

Looking ahead

Massive MIMO will continue to play a critical role in modern networks, but that does not diminish the importance of passive antennas.

In fact, as operators seek cost-effective ways to improve network performance, the most advanced passive antennas are becoming more valuable than ever.

The future belongs not to antennas optimized solely for antenna specifications, but to antennas engineered around real network outcomes.

That is the philosophy behind PerforMax®: helping operators unlock more capacity, broader coverage and greater value from every cell site.

If you would like to learn more about ANDREW PerforMax® antennas, feel free to reach out to me or your local ANDREW representative.