A programmable multi-port antenna and transceiver architecture for dynamic beamforming, interference suppression, and broadband MIMO communication

Background

Millimeter-wave (mmWave) communications have emerged as a cornerstone for next-generation wireless networks, including 5G and beyond, due to their ability to support extremely high data rates and dense spatial multiplexing. The deployment of large-scale multiple-input multiple-output (MIMO) antenna arrays at mmWave frequencies enables advanced beamforming, spatial diversity, and interference mitigation, which are essential for meeting the demands of high-capacity, low-latency wireless connectivity. However, the wide frequency range required for mmWave operation—often spanning tens of gigahertz—poses significant challenges for antenna and transceiver design. As wireless systems seek to operate over broader spectral bands and in increasingly complex electromagnetic environments, there is a growing need for antenna architectures that can deliver frequency agility, robust beam steering, and effective interference suppression, all within compact and energy-efficient hardware.

Current approaches to mmWave MIMO arrays typically rely on uniform linear arrays (ULAs) composed of identical, periodically spaced antenna elements with fixed, narrowband radiation patterns. While this configuration is effective at a single frequency, it becomes problematic for wideband operation. As frequency increases, the fixed element spacing can approach or exceed the wavelength, leading to the emergence of grating lobes and elevated side lobes that degrade array performance, reduce beamforming flexibility, and limit the scan range. Attempts to mitigate these issues—such as using aperiodic arrays, sparse configurations, or tightly coupled elements—often introduce additional complexity, cost, or performance trade-offs, such as increased mutual coupling or reduced aperture efficiency. Moreover, conventional hardware lacks the ability to dynamically adapt element patterns or suppress interference at the antenna level, limiting the array’s capability to operate efficiently in heterogeneous and interference-prone environments.

Technology

This technology is a sub-wavelength multi-port antenna architecture integrated with programmable transceiver elements, designed for advanced millimeter-wave (mmWave) communications. Each antenna element is equipped with multiple independently controllable ports, allowing dynamic adjustment of amplitude, phase, and impedance at each port. This enables real-time shaping of the antenna’s radiation pattern, including the creation of main lobes and notches, which can be steered or suppressed as needed. The system operates efficiently across a wide frequency range (37–73 GHz), overcoming traditional limitations such as grating lobes and restricted beamforming flexibility. The architecture is co-designed with a 65-nm CMOS transceiver front-end, featuring multi-stage amplifiers, broadband matching networks, and digital controls for precise pattern synthesis. This integration supports advanced functionalities like wide-angle beam steering, multi-beam generation, spatial multiplexing, and partial polarization diversity, all within a compact and energy-efficient platform.

What differentiates this solution is its element-level programmability, which fundamentally redefines how antenna arrays can operate across wide bandwidths. Unlike conventional arrays with fixed, single-port elements and static patterns, this architecture allows each element to independently tailor its radiation characteristics, enabling broadband grating lobe suppression and enhanced scan range without sacrificing aperture area or introducing excessive complexity. The ability to direct notches toward interferers at the antenna level provides powerful spatial filtering before traditional beamforming, significantly improving interference rejection and signal-to-interference ratios. Furthermore, the system’s compatibility with standard CMOS processes ensures scalability and integration with existing silicon-based technologies, making it uniquely positioned to meet the demands of next-generation mmWave wireless networks that require compact, adaptive, and high-performance antenna solutions.

Benefits

• Wideband operation across 37–73 GHz with suppressed side lobes and grating lobes, enabling efficient frequency-agile mmWave communication.
• Element-level programmability of antenna radiation patterns for dynamic beam steering, scan range enhancement (±110°), and notch formation toward interferers.
• Antenna-level interference suppression improving signal-to-interference ratio by up to 10 dB, reducing linearity and power demands on transceiver stages.
• Generation of multiple independent beams and partial polarization diversity from a single antenna element, supporting spatial multiplexing and robust link quality.
• Integrated multi-port antenna and 65-nm CMOS transceiver co-design enabling compact, energy-efficient, and scalable MIMO arrays.
• High data rate support demonstrated up to 12 Gb/s with advanced modulation schemes (e.g., 64-QAM) over wide frequency bands.
• Advanced multi-port dual-polarized receiver architecture with dynamic pattern reconfiguration and antenna-level spatial filtering for enhanced interference rejection.

Applications

• 5G/6G mmWave base stations
• High-speed wireless backhaul links
• Interference-resistant IoT networks
• Automotive radar and sensing
• Satellite broadband communications

Additional info

A sub-wavelength multi-port antenna architecture integrated with 65-nm CMOS transceivers enables element-level programmable radiation patterns. By adjusting port amplitude, phase, and impedance, it dynamically shapes lobes and notches, suppressing grating/side lobes (37–73 GHz), enhancing beam steering, providing antenna-level interference rejection, and supporting spatial multiplexing and polarization diversity.