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標題: | 應用於天文接收機之差動低雜訊放大器與應用於5G通訊之提升線性度混頻器設計 Design of Differential LNA for Radio Astronomy Receiver and Mixer with Improved Linearity for 5G Communication |
作者: | Zhi-Yin Jiang 姜智尹 |
指導教授: | 王暉 |
關鍵字: | 平方公里陣列,高速電子遷移率電晶體,低雜訊放大器,寬頻,天文接收機,混頻器,次諧波,線性化技術, Square Kilometre Array (SKA),pHEMT,Low Noise Amplifier,Broadband,Astronomy Receiver,Mixer,Sub-harmonic,Linearization Technique, |
出版年 : | 2019 |
學位: | 碩士 |
摘要: | 低雜訊放大器在無線電接收機系統中扮演重要角色。在射頻天文應用中,需要高靈敏度的接收器。對於平方公里陣列,射頻望遠鏡的工作頻率範圍很寬。SKA1中頻覆蓋0.35-14 GHz的頻率範圍,需要寬帶高增益低雜訊放大器。這個頻帶被分成幾個子頻帶,其中SKA1中頻band-5覆蓋4.6到13.8 GHz的頻率範圍。
隨著第五代行動通訊的發展,毫米波的研究與應用已經成為現在的趨勢。然而,對於頻寬及更高的傳輸速率需求與日俱增,現今無線通訊頻率主要在6 GHz以下已經相當飽和,因此往更高頻率設計為重要的技術發展。其中,28 及39 GHz為第五代行動通訊主要潛在發展頻段。在無線通訊系統中,發射機的設計相當重要及關鍵,本篇論文著重於發射機混頻器的設計與研究。 本篇論文主要分成兩個部分: 第一部分為接收器前端電路之低雜訊放大器相關研究。低雜訊放大器在射頻接收前端系統為一重要元件;它將從天線端接收之微弱的射頻訊號放大並導入較少的雜訊。藉由準確地選擇電路架構,此低雜訊放大器在4.6到13.8 GHz系統規格之頻帶內提供足夠增益(35 ± 3 dB)及雜訊指數(1 ± 0.2 dB)。然而,目前尚沒有發布針對在SKA1中頻band-5中的差動輸入-單端輸出的低雜訊放大器。這個低雜訊放大器也完全整合了差動輸入-單端輸出的架構。因此,它適用於下一代前端射電天文接收器系統。 第二部分提出了一個以65nm CMOS 製程設計的Q-band次諧波升頻混頻器,其中設計頻段為未來5G可行通訊頻段 (39GHz)。此次諧波混頻器在39 GHz射頻頻率、100 MHz基頻頻率以及5 dBm的本地振盪源之下,能夠提供-2.5 dB之增益、-11.7 dBm的輸出1 dB功率壓縮點以及高於50 dB的兩倍LO到RF頻率之隔離度。此混頻器利用衍生疊加的架構,在升頻混頻器中可以提供較好的線性度。本混頻器在經過線性化改善之後,可以提升4 dB 之三階輸出截止點(OIP3)。 Low noise amplifiers play an important role in radio receiver systems. In radio astronomy application, high sensitivity receivers are required. For Square Kilometre Array (SKA), the radio telescope has a wide operating frequency range. The SKA-mid array covering the frequency range of 0.35-14 GHz and requires a broadband high gain LNA. This band is divided into several sub-bands, where SKA-mid band-5 covers the frequency range of 4.6 to 13.8 GHz. With the development of the fifth-generation mobile communication (5G), the research and application of millimeter wave is the current trend. However, the demand for bandwidth and higher transmission rates is increasing day by day. Recent wireless communication frequencies are quite saturated below 6 GHz, so designing to higher frequencies is an important technological development. Among them, 28 and 39 GHz are the main potential development bands for the fifth-generation mobile communication. In wireless communication systems, the design of the transmitter is quite important and critical. This paper focuses on the design and research of transmitter mixers. This paper is divided into two parts: The first part is the research of low noise amplifier related to the receiver front-end circuit. The low noise amplifier is an important component in the radio receiving front-end system; it amplifies the weak radio signal received from the antenna and introduces less noise. By accurately selecting the circuit architecture, this low noise amplifier provides peak gain (35 ± 3 dB) and noise figure (1 ± 0.2 dB) in the 4.6 to 13.8 GHz system specification band. However, there is no published differential input to single-ended output low noise amplifier operating in the SKA1-mid band-5. Currently, this low noise amplifier also fully integrates the differential input to single-ended output architecture; hence, it is suitable for next-generation front-end radio astronomical receiver system. The second part presents a Q-band sub-harmonic up-converter fabricated in a 65nm CMOS process, where the design band is the future 5G feasible communication band (39GHz). The sub-harmonic mixer provides -2.5 dB gain, -11.7 dBm output 1-dB power compression (OP1dB) at 39 GHz radio frequency (RF) frequency, 100 MHz intermediate frequency (IF) frequency with 5 dBm of local oscillator (LO) power and higher than 50 dB 2LO-to-RF isolation. This mixer utilizes a derivative superposition structure to provide better linearity in up-conversion mixer. With the linearization technique, the linearized mixer shows 4-dB OIP3 improvement. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/74740 |
DOI: | 10.6342/NTU201904425 |
全文授權: | 有償授權 |
顯示於系所單位: | 電信工程學研究所 |
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