طراحي بهينه پيوننده خط شاخهاي با تطبيق امپدانس
الموضوعات :
همایون عریضی
1
(دانشگاه علم و صنعت ایران)
جمال حامدفر
2
(شركت ليرلن خودرو)
الکلمات المفتاحية: پيوننده جهتيپيوننده خط شاخهايتطبيق امپدانسبهينهسازيمدارات ميكروويوطراحي به كمك كامپيوتر,
ملخص المقالة :
در اين مقاله يك روش عددي براي طراحي بهينه پيوننده خط شاخهاي براي تقسيم توان اختياري بين دهانههاي خروجي در يك باند فركانسي همراه با تطبيق امپدانس منبع به امپدانس بار ارائه ميشود. ابتدا، دامنه امواج منعكسه و منتقله در چهار دهانه پيوننده بر حسب ضرايب انعكاس و انتقال نوشته شده كه بر حسب پارامترهاي پراكندگي و در نهايت بر حسب ماتريس انتقال در تحليل زوج و فرد بيان ميشود. بالاخره پس از محاسبه توان خروجي در چهار دهانه، تابع خطائي براي نسبت توانها در خروجيهاي پيوننده در باند فركانسي مطلوب ميسازيم. در اين روش مدلهاي پاشندگي براي خطوط ميكرواستريپ نيز منظور ميشود. كمينهسازي تابع خطا، ابعاد پيوننده مانند پهناي نوار ميكرواستريپ و طول خطوط و شاخههايش را به دست ميدهد. پاسخ فركانسي حاصل از برنامههاي كامپيوتري نشان ميدهد كه روش پيشنهادي براي طراحي بهينه پيوننده خط شاخهاي موثر و كارآمد ميباشد.
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