مروری بر آنتن های ریزنواری چاپی درکاربرد عینک های هوشمند

مهندسی مخابرات جنوب

دوره 13، شماره 49، مهر 1402، صفحه 81-104   

نوع مقاله: مقاله مروری

شناسه دیجیتال (DOI): 10.30495/jce.2023.1973526.1178

نویسنده

مهدی جلالی^*

*استادیارگروه برق، دانشکده فنی مهندسی، واحد نقده، دانشگاه آزاد اسلامی، نقده، ایران مرکز تحقیقات مایکروویو و آنتن، واحد ارومیه،

چکیده

این مقاله به مرور برخی از آنتن­های ریزنواری چاپی مورد استفاده در عینک­های هوشمند می­پردازد که می‌توانند فرکانس­های  700-960 مگاهرتز و 7/2-7/1 گیگاهرتز و نیز وای­فای نسل پنجم (85/5- 18/5 گیگاهرتز) و وای­فای نسل ششم توسعه داده شده (125/7- 925/5 گیگاهرتز) را پوشش دهند تا در عینک‌های متصل بی‌سیم استفاده شوند. از آن­جایی که آنتن‌های دستگاه‌های عینک هوشمند که در استاندارد ارتباطات سلولی نسل­های پنجم و ششم و ارتباطات داخلی بی‌سیم وای­فای نسل ششم کار می‌کنند، موضوع جدیدی است، ابتدا مطالعه کلی برای پهنای باند آنتن در محل­های قرارگیری مختلف انجام می‌شود. این آنتن­ها به صورت عنصرهای متقابل (تزویجی) طراحی می­شوند و اکثرا بر روی زیرلایه FR4 و یا پلی­کربنات قرار می­گیرند. سپس به آنتن­های چند ورودی-چند خروجی مورد استفاده در این عینک­ها موجود در مراجع پرداخته می­شود و بهره، راندمان و مطالعات آهنگ جذب ویژه به همراه حالت­های مختلف انجام می­شود. برای به دست آوردن انطباق خوب با موارد استفاده عملی، سر انسان همیشه در شبیه­سازی­ها در نظر گرفته می­شود. در نهایت، مزایا و معایب آنتن­های مورد استفاده در این عینک­ها در مراجع مختلف با هم مقایسه می­شود.

کلیدواژه‌ها

آنتن‌ عینک هوشمند؛ سیستم‌های چند ورودی-چند خروجی؛ نرخ جذب ویژه؛ تزویج

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