{"title":"模式可重构金属表圈智能手表GPS天线增强定位性能","authors":"Hui Li, Wenrui Zheng, Yonghua Kong, Guo-Lin Liu","doi":"10.1002/mop.70197","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>Steering the radiation pattern to the desired direction is highly anticipated for smartwatch GPS antenna in user scenarios, as it prevents energy from being wasted in unnecessary directions. In this paper, a dual-pattern reconfigurable metal-bezel smartwatch GPS antenna is proposed, which is capable of concentrating radiation energy according to different wearing preferences. The smartwatch consists of a metal bezel and a ground plane. An <i>L-</i>shaped branch is introduced, enabling current coupling into the clearance. With only two switches, opposite localized current paths can be achieved within the clearance, contributing to different radiation patterns. As a result, the antennas' peak gains of −0.70 dBi and −0.84 dBi are achieved at 1.575 GHz, respectively, which are suitable for left-wrist and right-wrist wearing scenarios. Antenna prototypes were fabricated, with the measured results agreeing well with the simulated ones. The <i>L</i>-shaped branch can be realized by laser direct structuring (LDS). The simple and practical implementation offers a feasible solution for enhancing the performance of smartwatch GPS antenna.</p>\n </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 4","pages":""},"PeriodicalIF":1.0000,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Pattern-Reconfigurable Metal-Bezel Smartwatch GPS Antenna for Enhanced Positioning Performance\",\"authors\":\"Hui Li, Wenrui Zheng, Yonghua Kong, Guo-Lin Liu\",\"doi\":\"10.1002/mop.70197\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n <p>Steering the radiation pattern to the desired direction is highly anticipated for smartwatch GPS antenna in user scenarios, as it prevents energy from being wasted in unnecessary directions. In this paper, a dual-pattern reconfigurable metal-bezel smartwatch GPS antenna is proposed, which is capable of concentrating radiation energy according to different wearing preferences. The smartwatch consists of a metal bezel and a ground plane. An <i>L-</i>shaped branch is introduced, enabling current coupling into the clearance. With only two switches, opposite localized current paths can be achieved within the clearance, contributing to different radiation patterns. As a result, the antennas' peak gains of −0.70 dBi and −0.84 dBi are achieved at 1.575 GHz, respectively, which are suitable for left-wrist and right-wrist wearing scenarios. Antenna prototypes were fabricated, with the measured results agreeing well with the simulated ones. The <i>L</i>-shaped branch can be realized by laser direct structuring (LDS). The simple and practical implementation offers a feasible solution for enhancing the performance of smartwatch GPS antenna.</p>\\n </div>\",\"PeriodicalId\":18562,\"journal\":{\"name\":\"Microwave and Optical Technology Letters\",\"volume\":\"67 4\",\"pages\":\"\"},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2025-04-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Microwave and Optical Technology Letters\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/mop.70197\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microwave and Optical Technology Letters","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/mop.70197","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
Pattern-Reconfigurable Metal-Bezel Smartwatch GPS Antenna for Enhanced Positioning Performance
Steering the radiation pattern to the desired direction is highly anticipated for smartwatch GPS antenna in user scenarios, as it prevents energy from being wasted in unnecessary directions. In this paper, a dual-pattern reconfigurable metal-bezel smartwatch GPS antenna is proposed, which is capable of concentrating radiation energy according to different wearing preferences. The smartwatch consists of a metal bezel and a ground plane. An L-shaped branch is introduced, enabling current coupling into the clearance. With only two switches, opposite localized current paths can be achieved within the clearance, contributing to different radiation patterns. As a result, the antennas' peak gains of −0.70 dBi and −0.84 dBi are achieved at 1.575 GHz, respectively, which are suitable for left-wrist and right-wrist wearing scenarios. Antenna prototypes were fabricated, with the measured results agreeing well with the simulated ones. The L-shaped branch can be realized by laser direct structuring (LDS). The simple and practical implementation offers a feasible solution for enhancing the performance of smartwatch GPS antenna.
期刊介绍：
Microwave and Optical Technology Letters provides quick publication (3 to 6 month turnaround) of the most recent findings and achievements in high frequency technology, from RF to optical spectrum. The journal publishes original short papers and letters on theoretical, applied, and system results in the following areas.
- RF, Microwave, and Millimeter Waves
- Antennas and Propagation
- Submillimeter-Wave and Infrared Technology
- Optical Engineering
All papers are subject to peer review before publication
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