NC State Researchers Demonstrate Laser-Powered Antenna

A team used laser-induced plasma to transmit radio signals, offering a potential alternative to conventional metal antennas.

Updated on Oct. 20, 2026 in Materials Science

A glowing blue plasma filament suspended between two metal housings in a dimly lit laboratory, representing advanced radio frequency research. — North Carolina State University researchers successfully transmitted radio signals using laser-induced plasma filaments, a breakthrough that could replace traditional metal hardware. AI Illustration. Upload story photo >

Live Poll

Should federal research funding prioritize developing experimental communication technologies like plasma antennas?

Researchers at North Carolina State University have successfully demonstrated a plasma antenna that uses laser-induced filaments to transmit radio signals. This experimental setup creates a conductive channel in the air, allowing for signal transmission without a traditional metal radiating element.

Why it matters

This innovation aims to replace conventional metal hardware with reconfigurable plasma, potentially transforming how satellites and aircraft manage communication. By using light to form the antenna itself, engineers can design more flexible and adaptable signal transmission systems.

The study utilized a laser with a 100 femtosecond pulse duration at a 1 kilohertz repetition rate to generate a plasma filament measuring 20 centimetres long and 0.1 millimetres in diameter. This filament effectively carried a 30 MHz radio signal.

The players

North Carolina State University

This is a public research university located in Raleigh that serves as the site for the development and testing of the plasma antenna technology.

The details

The system operates by ionizing air into a plasma filament, which then functions as an electrical conductor. A capacitively coupled feed transfers energy to the filament without physical contact, successfully beaming signals to a receiver positioned five centimetres away.

The research findings were published on October 20, 2026.

The Big Picture

This discovery marks a shift in the field of radio frequency engineering, potentially moving beyond the limitations of rigid, fixed metal hardware. It challenges the existing reliance on static antenna structures and opens new theoretical research paths into gas-based signal emitters.

While the technology is currently in a laboratory stage, its successful development could eventually lead to lighter, more durable communication components for consumer aircraft and space technology. This could result in improved signal reliability for global data transmission networks.

The takeaway

This experiment proves that air can be turned into a functional radio component using high-speed laser pulses. Future applications will focus on making these systems energy-efficient enough for widespread integration into modern aerospace vehicles.