寬頻微型化六埠網路接收機;Wideband and Compact-Size Six-Port Receiver

NCUIR > College of Electrical Engineering & Computer Science > Graduate Institute of Electrical Engineering > Electronic Thesis & Dissertation > Item 987654321/73025

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/73025

Title:	寬頻微型化六埠網路接收機;Wideband and Compact-Size Six-Port Receiver
Authors:	黃冠淳;Huang, Guan-Chun
Contributors:	電機工程學系
Keywords:	寬頻;微型化;Wideband;Compact-Size
Date:	2017-01-19
Issue Date:	2017-05-05 17:39:19 (UTC+8)
Publisher:	國立中央大學
Abstract:	本論文以微型化寬頻六埠網路接收機為主題，發展由微型化六埠網路、寬頻功率偵測器與類比減法器組成之六埠網路接收機前端電路。為同時達到寬頻與微型化的效果，首先於積體被動元件(IPD)製程中實現以橋式T 線圈作為基本組件的微型化寬頻六埠網路，以輸入埠反射損耗大於10dB 定義頻寬，通帶為 1.28GHz~2.81GHz，比例頻寬FBW 為78.5%，電路面積僅為7.780mm×7.938mm，中心頻率1.95GHz 下之電氣尺寸為0.051λ0×0.052λ0。接續以蕭基二極體(Shottcky diode)實現中心頻率為1.95GHz ，以輸入反射損耗大於10dB 定義頻寬為 1.06GHz~2.4GHz 的寬頻功率偵測器，並探討改善其靈敏度與轉換效率的設計方式，再將兩功率偵測器的輸出訊號以類比減法器相減產生解調之I/Q 訊號。本研究提出兩種減法器設計，以配合不同靈敏度或位元傳輸率之設計考量。最後將減法器、功率偵測器與寬頻微型化六埠網路晶片，整合於印刷電路板，實現兩種微型化六埠網路接收機之前端電路，若以10dB 反射損耗定義頻寬，則RF 埠頻寬為1.4GHz~2.55GHz，比例頻寬FBW=58.97%；LO 埠頻寬為1.35GHz~2.75GHz，比例頻寬FBW=71.79%，接收機之電路面積為27.71mm×45.72mm，電氣尺寸在中心頻率1.95GHz 下約為0.18λ0×0.3λ0。本研究測試接收機三種數位調變：QPSK、 16-QAM、64-QAM 下之效能，其可操作頻寬約為1.6GHz~2.4GHz， LO 輸入功率為0dBm 時，設計Ⅰ在傳輸率1Msps 下，64-QAM 解調靈敏度約為-35dBm，最高能操作之速度為5Msps 內；設計Ⅱ在傳輸率5Msps 下， 64-QAM 解調靈敏度約為-15dBm，最高能操作之速度可達20Msps。本研究提出之設計保留六埠網路架構簡單與寬頻之優點，並利用橋式T 線圈架構達成微型化的設計目標，且能應用於多種數位調變，未來可進一步整合低雜訊放大器及基頻電路，實現軟體無線電接收機，並導入次世代手持於線通訊裝置。;This goal of this work is the development of wideband six-port receiver with compact size. This receiver is composed of six-port network, power detectors and analog substractors. In order to achieve widewidth band and compact size simultaneously, bridged-T coil-based six-port network realized by the integrated passive device (IPD) process is proposed. The measured 10-dB return loss bandwidth is from 1.28GHz to 2.81GHz and the corresponding fractional bandwidth is 78.5%. Furthermore, this compact six-port network exhibits a circuit size of only 7.78 mm×7.94 mm, which corresponds to an electrical size of 0.051λ0×0.052λ0 at f0 = 1.95GHz. Next, shottcky diodes are used to implement wideband power detectors with a center frequency f0=1.95GHz and 10-dB return loss bandwidth from 1.06GHz to 2.4GHz. Parameter studies to improve the sensitivity and conversion efficiency has also been done. Then, analog subtractors are used to obtain the difference between two power detector’s outputs to give the demodulated I/Q signal. This work also presents two subtractor designs for high sensitivity or high bit rate considerations. Lastly, four power detectors, two analog subtractors, and the six-port network IPD chip are integrated in a PCB to realize the six-port receiver front-end. The measured 10-dB return loss bandwidth for the RF port is from 1.4GHz~2.55GHz (FBW = 58.97%) and that for the LO port is from 1.35GHz~2.75GHz (FBW = 71.79%). The circuit size of the proposed receiver front end is about 27.71mm×45.72mm, which corresponds to an electrical size of 0.18λ0×0.3λ0 at f0=1.95GHz. The receiver is tested under three kinds of modulation scheme, i.e., QPSK, 16-QAM and 64-QAM. The proposed six-port receiver frond end can cover the frequency band from 1.6GHz to 2.4GHz. For the designⅠ, under a data rate of 1Msps and a LO power of 0 dBm, the measured RF port sensitivity for 64-QAM modulation is -35dBm, and the maximal data rate is 5Msps. III For the designⅡ under a data rate of 5Msps and a LO power of 0 dBm, the RF port sensitivity for 64-QAM modulation is -15dBm but a maximal data rate of 20Msps can be achieved. The proposed receiver front end design maintains the advantages of low circuit complexity and high bandwidth of the conventional six-port receiver, while the circuit size is significantly reduced by using bridged-T coils. The proposed receiver can accommodate multiple modulation schemes. It can be further integrated with a low noise amplifier, a synthesizer, and baseband circuits to implement a software defined radio receiver for handheld wireless communication devices.
Appears in Collections:	[Graduate Institute of Electrical Engineering] Electronic Thesis & Dissertation

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