NEC Develops Compact Millimeter Wave Antenna for Past 5G, 6G Networks

NEC Company has efficiently developed and demonstrated a radio-over-fiber system (RoF) with a 1-bit fiber transmission methodology. By utilising this methodology, high-frequency analog indicators could be transmitted utilizing a reasonable electrical-to-optical converter for general-purpose digital communications, thereby enabling the realisation of a compact distributed antenna unit (DA) at low value, NEC stated on Monday.

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In consequence, a secure millimeter-wave communication surroundings could be inexpensively achieved in high-rise buildings, underground malls, factories, railways, indoor services, and different obstacle-laden environments.

In line with NEC, Excessive-speed wi-fi communications leveraging millimeter-wave know-how are anticipated to be a key know-how for past 5G/6G. Specifically, since roughly 80 p.c of cell communication visitors happens indoors, millimeter-wave is being thought of as an indoor resolution.

NEC’s 1-Bit RoF System

NEC defined that on account of propagation loss and excessive linearity within the millimeter-wave frequency band, it’s essential to take care of line of sight between base stations and terminals to make sure ample high quality of service (QoS). Whereas dense set up of distributed antenna models for direct transmission and reception of knowledge with terminals and avoiding obstacles is understood to be efficient in resolving these points, the scale, energy consumption, and price of putting in the required variety of DA have confirmed to be main points. To beat these points, it has developed a radio-over-fiber system (RoF) and a associated transmission methodology, NEC stated.

The newly developed 1-bit RoF system simplifies the transmission of high-frequency analog indicators by changing them into 1-bit pulse indicators for fiber optic transport. This strategy considerably reduces each energy consumption and deployment prices in comparison with conventional RoF techniques. In contrast to digital RoF techniques requiring complicated digital sign processing (DSP) and digital-to-analog conversion (DAC) gear, and analog RoF techniques needing pricey high-linearity converters, NEC’s methodology employs reasonably priced, general-purpose electrical-to-optical converters, the official launch stated.

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Technical Achievements

Key technical achievements embody the event of a excessive Sign-to-Noise and Distortion Ratio (SNDR) 1-bit modulator for environment friendly sign conversion. NEC additionally carried out superior vector decomposition and digital copy methods to take care of sign integrity in each downlink and uplink transmissions.

NEC stated it has validated the system’s efficiency within the 40 GHz band, confirming compliance with cell communication requirements by means of prototype distributed antenna models (DAUs). These compact DAUs are designed for high-density set up, enhancing line-of-sight communication capabilities in varied complicated environments.