W頻段基板整合波導機械式開關器研究設計

Abstract

本論文以基板整合波導去設計一個操作在W頻段的機械式開關器。使用基板為介電常數2.2的Rogers RT-Duroid 5880®，採用10 mil 厚度的板材，先決定出所要操作的中心頻率90GHz，帶入基本矩形波導的公式決定出基板整合波導的尺寸，以此為基準設計出SPST並觀察其特性，因應實際製程的修正改進，提出四種基板整合波導開關結構，而四種的設計皆由機械式的外部按壓，來呈現開關器的開與關兩種模態，按壓工具的接觸面必須為導電材質，再將相同概念用於實作SPDT的設計，而此基板整合波導開關器都為H-平面電路，藉由新設計的矩形波導到基板整合波導轉換器進行量測。由基板整合波導直接轉至矩形波導以方便使用網路分析儀做量測的工作，而輸入輸出的金屬波導為標準W-band的WR-10波導，經過完善的組裝機殼與基板整合波導可得出正確的量測結果。

In this thesis, W-band mechanical switches are proposed using the substrate integrated waveguide (SIW). The substrate integrated waveguiude is manufactured on a Rogers RT-Duroid 5880® low loss substrate with a dielectric constant of 2.2, and a thickness of 10mil. The first step to design the proposed single-pole-double-throw (SPDT) switch is to design a SIW single-pole-single-throw (SPST) switch with a center frequency of 90GHz. Then decide the size of the SIW by the formula of rectangular waveguide. Four different kind of SPST SIW switch structures are designed based on these rules. The on and off of the SPST switch is mechanically controlled by a piece of conducting material to lift or contact the specified area of the switch. Based on the design of SPST SIW switch, the same concept is applied to design the SPDT SIW switch. All the circuits are H-plane SIW circuits that they could be easily measured by a network analyzer with the W-band (WR-10) waveguide extenders through the newly developed SIW to rectangular waveguide transitions.