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Related Concept Videos

Semiconductors01:22

Semiconductors

There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...

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Related Experiment Video

Updated: Jul 3, 2026

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
05:57

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

STARE: a semiconductor-integrated transmit-array architecture for 6G beamforming.

Jinhyun Kim1, Byeongjin Kim1, Minkyu Park1

  • 1Department of Electrical and Computer Engineering (ECE) and Institute of New Media and Communications (INMC), Seoul National University, Seoul, Republic of Korea.

Nature Communications
|July 1, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces STARE, the first semiconductor-foundry-manufacturable reconfigurable intelligent surface (RIS). This scalable, low-power technology enables efficient beam steering for future wireless systems.

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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
15:25

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Related Experiment Videos

Last Updated: Jul 3, 2026

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
05:57

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
15:25

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

Published on: February 4, 2018

Area of Science:

  • Electrical Engineering
  • Materials Science
  • Wireless Communications

Background:

  • Reconfigurable intelligent surfaces (RIS) are crucial for 6G wireless networks.
  • Existing RIS technologies face limitations in speed, signal loss, and manufacturing cost.

Purpose of the Study:

  • To develop the first RIS system manufactured using a standard semiconductor process.
  • To address limitations of current RIS implementations for improved 6G performance.

Main Methods:

  • Developed the STARE (Semiconductor Transmit Array with Reconfigurable Elements) architecture.
  • Integrated custom Selective Overlap Diodes (SODs) into high-resistivity silicon.
  • Utilized a vialess unit cell with magnetic coupling to eliminate through-silicon vias.

Main Results:

  • Achieved tunable ON resistance and OFF capacitance with low power consumption.
  • Demonstrated 180° phase control and beam steering from -45° to +45° at 15.5 GHz.
  • Verified semiconductor-foundry manufacturability of the RIS system.

Conclusions:

  • STARE represents the first semiconductor-foundry-manufacturable RIS, bridging device fabrication and system beamforming.
  • Offers a scalable, energy-efficient, and cost-effective solution for future wireless systems.
  • Enables practical implementation of RIS technology in 6G and beyond.