This video shows the 2D light show using RF-triggered smart LED sensors & UAVs which have integrated an UHF RFID reader and a Zigbee for remote control. 

A near-field switched loop antenna array with a circular defected ground structure for precise positioning systems is presented. By switching the loop array, the positions of the densely placed small-sized radio frequency identification tags can be identified. The characteristics of the proposed array are verified by the comparisons to the simulated results and experimental measurements.

[System Specification]

Frequency band: 840~950MHz

Antenna size: 80…

 Proposed module integrated wireless power transfer antenna with a metal plate inside the loop improves transmission efficiency by reducing the change of mutual inductance caused by the change of distance between two antennas. The antenna was designed and implemented on a 1 mm FR-4 substrate.

[System specification]

Operating Frequency : 6.78 MHz

Transmission Coefficient : -0.72 dB (Max. at 50 mm), -6.34 dB (Min. at 1 mm)

Physical Size : 110 ×…

 To detect multiple identifications (IDs) for cm-level high-precision positioning item-level tagging (ILT) systems in near-field ultra-high frequency RFID applications, an electric-field-coupled multiple ID sensor is presented. The proposed ID sensor consists of four circular electric coupling parts, an impedance-matching network, and an SP4T switch for position control. By switching the electric-field coupled sensing parts, cm-level position detection of densely aggregated RFID tags for…

 A near-field ultrahigh-frequency radio frequency identification (RFID) system, which has cm-level 2-D positioning precision, is proposed. The system consists of a grid-shaped microstrip traveling wave antenna (TWA) and four-port switched differential feeding networks. To selectively form tag-read sections, opposite directional currents (ODCs) are used. 

[System Specification]

 For improving transfusion safety, a smart blood bag management system using a load-integrated U-shaped nearfield antenna (LUNA) array is proposed. The system consists of four LUNAs for ID sensing with blood information and a switching circuit for the sensing of blood bag localization. The proposed system can be used to prevent the mishandling of blood transfusions and to manage blood bags remotely and effectively.

[System Specification] 

Freq. band…

 We propose a highly efficient wireless power transfer system with automatic impedance tuning control for practical applications with variable operating distances. Under misalignment between the transmitting and receiving antenna or any operating distance, the proposed distance-adaptive WPT system achieves an improved PTE of maximum 160% by minimizing the reflection coefficient in the transmitting system. It can be useful in wireless charging without the response of the portable receivin…

 For wireless item management using a smart UAV, the proposed system consists of UHF RFID reader and antenna, ZigBee for wireless communications, and an UAV. We can detect and manage the items remotely and effectively. This movie shows the proposed smart UAV prototype and  describes the item sensing, and monitoring.

[System Specification]

Item sensing distance : up to 10 m
Wireless communications distance : up to hundreds of meters

&n…