寬頻平衡式微波壓控振盪器之研製

The Study and Implementation of Wide-Band Balanced Microwave VCO

王鐘民(Zhong-Ming Wang)

指導教授 ： 王鐘民

元智大學/工程學院/電機工程學系/碩士(2000年)

摘要

壓控振盪器係無線通訊系統之關鍵組件，它經常被使用在無線收發機中作為可精確調控頻道頻率之本地振盪源。本論文將以950MHz-2150MHz 衛星頻段用機上盒系統之諧調器為主要設計目標，發展寬頻(1430MHz-2630MHz)、低相位雜訊、低成本、小尺寸之單端式及平衡式微波壓控振盪器。基於整個通訊工業之發展趨勢及商業需求，完成多晶片模組（Multi-Chip-Module）積體化製程技術來研製1430MHz-2630MHz頻段小型微波壓控振盪器。此一製程技術包括：單層PC板混成積體化製程技術、陶瓷板厚膜積體化製程技術及單晶微波積體電路製程技術。以MMIC來研製VCO雖然其相位雜訊較大，但有些系統之規格是可以容忍較大之相位雜訊，例如短距離無線通訊系統或是衛星頻段用機上盒降頻器之本地振盪源。實際製作的寬頻單端式微波壓控振盪器其實體大小約為10mmx10mm，經量測後顯示：輸出功率都能維持在4.5dBm以上、相位雜訊為-100dBc/Hz @100KHz offset。寬頻平衡式微波壓控振盪器是包含兩組寬頻單端式微波壓控振盪器相連接而成，其具有二端輸出功率相等且相位差180度之特性，通常都運用在平衡式混頻器之本地振盪源。其實體大小約為18mmx10mm，經量測後顯示：輸出功率都能維持在4dBm以上、相位雜訊至少有-98dBc/Hz @100KHz offset。

關鍵字

壓控振盪器 ； 單晶微波積體電路 ； 多晶片模組

並列摘要

VCO is the key component of wireless communication system, which is usually used for precise channel tuning of local oscillator of transmitter or receiver. The design target of our research is to develop a wide-band (1430MHz-2630MHz), low phase noise, low cost, compact size, single-end and balanced microwave VCOs for 950MHz - 2150MHz DBS set-top box Tuner. Therefore in this work we will study and implement 1430MHz - 2630MHz miniature microwave VCOs by multi-chip-module integration technology. This technology includes the processes of single layer PC board hybrid integration circuit; ceramic thick film integrated circuit and monolithic microwave integrated circuit. Though the phase noise of MMIC VCO is higher than MIC VCO, some systems, such as short-range wireless communication and DBS set-top box tuner, are still tolerable with MMIC. In the implementation of wide-band single-end microwave VCO, the measured results indicate: The size is 10mmx10mm, output power of all kinds of VCO are at least 4.5dBm and phase noise are below -100dBc/Hz offset at 100kHz. The implementation of wide-band balanced microwave VCO consist of two wide-band single-end microwave VCO, their respective output signals have equal amplitude and are 180°out of phase. The size is 18mmx10mm, output power of all kinds of VCO are at least 4dBm and phase noise are below -98dBc/Hz offset at 100kHz.

並列關鍵字

VCO ； MMIC ； multi-chip-module

參考文獻

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