本論文包含三項研究主題，第一部份為應用於室內人數偵測之60GHz槽孔陣列天線，其中為了以最少的雷達數量涵蓋最大的偵測空間，乃需要一款頻寬4GHz且寬波束的60GHz毫米波天線，並搭配德州儀器(TI)公司的60GHz 3T4R雷達模組，以作為3D空間的物體偵測之用。由於室內人數偵測之雷達應用大多採用貼片天線的型式，若要包含四周 的偵測範圍一般需要使用4個雷達模組，並且若雷達模組天線極化方向相同，模組與模組間的電磁干擾會較大，因此本研究提出一款寬波束且極化方向與貼片天線正交的天線設計，期能減少所需雷達模組個數以及降低相互干擾。
第二部分為Ka頻段衛星通訊圓極化陣列天線設計，為了滿足收發機高頻寬與小型化之需求，衛星通訊系統所使用頻段，由傳統的微波頻帶不斷朝著毫米波頻帶演進。操作在Ka頻段的衛星通訊具備相當優勢，除了可獲得足夠帶寬，也能解決既有頻帶壅塞問題。此外，以相同的天線尺寸來考量，其天線的增益也相較Ku頻段天線增益來得高，並且將能建置較輕巧之衛星及地面站。此外，當地面站天線追蹤對準衛星時，為避免兩端收發天線間極化偏移的影響，本研究乃設計圓極化陣列天線。
第三部分為電波傳播通道的分析，其中不管是在雷達偵測或衛星通訊，隨著傳輸頻率的提高，我們所面臨的通道衰減也隨之增加，並且在不同頻段，大氣中主要影響衰減的因素也不盡相同。本研究將針對Ka頻段與60GHz ISM頻段，來探討主要影響衰減的因素與分析衰減量，以在鏈路預算評估上能更貼近真實情況。

This thesis contains three research topics. The first part is a 60GHz slot antenna array used in indoor people detections. To cover the largest detection area with the least number of the radars, an array antenna with a 4GHz bandwidth and wider beam is requested. The 60GHz millimeter wave antenna applied with TI IWR6843 chip, which contains a three-transmitter and four-receiver architecture, can support object detections in three dimensions. Usually, indoor people detection applications use patch antenna arrays, which need four radar modules to include a 360° coverage. Besides, with the same antenna polarization of the modules, mutual interferences among the modules will increase. Therefore, in this study, an antenna array design with a wider beam and orthogonal polarization to the patch antenna array is proposed.
The second part is the circularly polarized antenna array design of the Ka-band satellite communications. In order to meet the wide bandwidth and miniaturization requirements of the transceiver, the frequency band of the antenna for the satellite communication system has been progressed from the traditional microwave to millimeter wave bands. Satellite communications operating in the Ka band have considerable advantages, such as solving the problem of the congestions in the existing frequency bands and obtaining a sufficient bandwidth. In addition, with the same antenna size, the gain of the antenna array is higher than that in the Ku band. Also, due to the higher operating frequency band, it is possible to build lighter and smaller satellites and ground terminals. Besides, to avoid the polarization mismatch between the transmitting and receiving antennas during the ground terminals tracking the satellites, a circularly polarized antenna array is designed in this thesis.
The third part is the analysis of the propagation channel. For the radar detections and satellite communications, the propagation frequencies become higher so that channel attenuation will increase. Also, in different frequency bands, main factors that affect the attenuation in the atmosphere are varied. Thus, this part will analyze the main factors that affect the attenuation and estimate the propagation losses for the Ka and 60GHz ISM bands, so that more accurate predictions for propagation attenuation may be obtained in evaluating link budgets.

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