會議論文
| 學年 | 112 |
|---|---|
| 學期 | 2 |
| 發表日期 | 2024-04-19 |
| 作品名稱 | Design of Internet of Things Sensor Tag Reader Front-End for Simultaneous Wireless Power Supply and Communication Capability |
| 作品名稱（其他語言） | |
| 著者 | Yu-Jen Chi; Pei-Ching Kao; Ching-Lieh Li; Thomson Lin |
| 作品所屬單位 | |
| 出版者 | |
| 會議名稱 | 2024 IEEE 4th International Conference on Electronic Communications, Internet of Things and Big Data (ICEIB) |
| 會議地點 | Taipei, Taiwan |
| 摘要 | The simultaneous transmission and reception technology plays a crucial role in sensor tag technologies similar to radio-frequency identification (RFID), which have simultaneous wireless information and power transfer (SWIPT). This technology allows for the simultaneous transmission and reception of information on the same frequency, or the simultaneous power supply and reception of messages. On the reader side, the transmitter and receiver must have high isolation to avoid self-interference caused by the transmitter. Sufficient sensitivity is required for a long reading distance. Using a circulator as a duplexer, In-Band Full-Duplex operates. Although the circulator transmits and receives signals simultaneously, it has insufficient isolation. In addition, reflections caused by imperfect antenna matching also interfere with the receiver. Since the reflection signal of the antenna and the leakage signal of the circulator are at a similar power level, we designed an impedance adjustment circuit to adjust the amplitude and phase of the reflection signal at the antenna end to counteract the self-interference signal of the circulator for self-interference elimination. Unlike the traditional pi-type impedance adjustment circuit with three variables, the proposed impedance adjustment circuit has two variables to adjust the impedance of the antenna in the range of voltage standing wave ratio (VSWR) of less than 3. A micro controller is used to automatically find the best result. The experimental results showed that the isolation at 2.45 GHz was 74 dB with which IoT sensor tag readers had power supply and communication in 5 m. |
| 關鍵字 | |
| 語言 | en |
| 收錄於 | |
| 會議性質 | 國際 |
| 校內研討會地點 | 無 |
| 研討會時間 | 20240419~20240421 |
| 通訊作者 | |
| 國別 | TWN |
| 公開徵稿 | |
| 出版型式 | |
| 出處 | |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/127127 ) |