CMOS多通道接收機(jī)通道間耦合問題及關(guān)鍵模塊研究
發(fā)布時(shí)間：2018-08-26 15:13
【摘要】：隨著無線技術(shù)的發(fā)展，各種新技術(shù)層出不窮，近年來多通道技術(shù)的應(yīng)用極大地提高了無線系統(tǒng)的性能。典型的多通道系統(tǒng)包括有源相控陣系統(tǒng)、MIMO（多輸入多輸出）系統(tǒng)、陣列成像系統(tǒng)等，相對傳統(tǒng)的單通道系統(tǒng)性能得到很大的提升；但是采用傳統(tǒng)分立器件搭建的多通道系統(tǒng)也存在成本高、體積大、功耗高和通道間一致性差等缺點(diǎn)。利用高集成度的硅工藝設(shè)計(jì)多通道芯片是多通道系統(tǒng)發(fā)展的必然趨勢，然而多個(gè)通道集成在同一個(gè)襯底，會加劇通道間的耦合，影響了多通道系統(tǒng)的性能。本論文主要研究多通道芯片中通道間的耦合和各模塊的設(shè)計(jì)，所以對多通道系統(tǒng)的發(fā)展具有重要意義。本論文的主要工作包括： 一、以焦平面被動成像系統(tǒng)為例，研究通道間耦合對陣列成像系統(tǒng)的影響，這是本文的一個(gè)創(chuàng)新點(diǎn)。在傳統(tǒng)理論的基礎(chǔ)上，建立了被動陣列成像的模型，從理論上推導(dǎo)并證明了通道間耦合對被動陣列成像的影響。 二、分析了幾種主要的耦合方式和影響通道間耦合的主要因素，，根據(jù)分析的結(jié)果針對鄰近電感對LNA（低噪聲放大器）間耦合的影響建立了模型，并推導(dǎo)出理論結(jié)果，這是本文的一個(gè)創(chuàng)新點(diǎn)。為了驗(yàn)證理論的正確性，本文采用集成電路仿真軟件cadence+電磁場仿真軟件sonnet協(xié)同仿真的方法與理論結(jié)果做對比。最后，在理論結(jié)果的指導(dǎo)下利用0.18μm RF CMOS工藝設(shè)計(jì)制作了四通道接收機(jī)，并對比了實(shí)測結(jié)果與理論結(jié)果。 三、以理論分析為指導(dǎo)，提出了2GHz四通道接收芯片的結(jié)構(gòu)；接著在研究LNA的噪聲、輸入匹配和增益的基礎(chǔ)上，提出了LNA的設(shè)計(jì)流程，并給出了仿真和測試結(jié)果；然后研究了MIXER（混頻器）的拓?fù)浣Y(jié)構(gòu)和設(shè)計(jì)流程，給出了仿真和測試結(jié)果；最后給出了2GHz四通道接收芯片的仿真和測試結(jié)果。 四、針對參考雜散和鎖定時(shí)間的矛盾，在傳統(tǒng)帶寬切換的基礎(chǔ)上提出了一種低雜散、快鎖定的混合型PLL（鎖相環(huán)）頻率綜合器�；旌闲蚉LL在瞬態(tài)為傳統(tǒng)單路徑、大環(huán)路帶寬PLL，在穩(wěn)態(tài)為雙路徑、小環(huán)路帶寬PLL，這是本文的一個(gè)創(chuàng)新點(diǎn)。最后為了驗(yàn)證理論的正確性，采用0.18μm RF CMOS工藝實(shí)現(xiàn)了混合型PLL頻率綜合器，并給出了PLL的測試結(jié)果。
[Abstract]:With the development of wireless technology, a variety of new technologies emerge in endlessly. In recent years, the application of multi-channel technology has greatly improved the performance of wireless systems. Typical multi-channel systems include active phased array systems (MIMO), array imaging systems, and so on. Compared with traditional single-channel systems, the performance of multi-channel systems has been greatly improved. However, the multi-channel system with traditional discrete devices also has the disadvantages of high cost, large volume, high power consumption and poor consistency between channels. It is an inevitable trend for multi-channel systems to design multi-channel chips using highly integrated silicon technology. However, if multiple channels are integrated on the same substrate, the coupling between channels will be aggravated and the performance of multi-channel systems will be affected. This paper mainly studies the coupling between channels and the design of each module in multi-channel chip, so it is of great significance to the development of multi-channel system. The main work of this thesis is as follows: first, the influence of coupling between channels on array imaging system is studied, which is an innovative point of this paper, taking focal plane passive imaging system as an example. Based on the traditional theory, the model of passive array imaging is established, and the influence of coupling between channels on passive array imaging is deduced and proved theoretically. Secondly, several main coupling modes and main factors affecting the coupling between channels are analyzed. According to the analysis results, the influence of adjacent inductors on the coupling between LNA (low noise Amplifier) is modeled, and the theoretical results are derived. This is an innovation of this paper. In order to verify the correctness of the theory, the integrated circuit simulation software cadence electromagnetic field simulation software sonnet collaborative simulation method is used to compare with the theoretical results. Finally, under the guidance of theoretical results, a four-channel receiver is designed and fabricated by using 0.18 渭 m RF CMOS process, and the measured results are compared with the theoretical results. Thirdly, under the guidance of theoretical analysis, the structure of 2GHz four-channel receiving chip is put forward, and the design flow of LNA is put forward on the basis of studying the noise, input matching and gain of LNA, and the simulation and test results are given. Then, the topology and design flow of MIXER are studied, and the simulation and test results are given. Finally, the simulation and test results of 2GHz four-channel receiver are given. 4. In view of the contradiction between reference spurious and locking time, a low spurious and fast locking hybrid PLL frequency synthesizer is proposed based on the traditional bandwidth switching. The hybrid PLL is a traditional single path in transient, the large loop bandwidth PLL, is a double path in steady state, and the small loop bandwidth PLL, is an innovation point in this paper. Finally, in order to verify the correctness of the theory, the hybrid PLL frequency synthesizer is realized by using 0.18 渭 m RF CMOS process, and the test results of PLL are given.
【學(xué)位授予單位】：北京理工大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TN851
本文編號：2205268
[Abstract]:With the development of wireless technology, a variety of new technologies emerge in endlessly. In recent years, the application of multi-channel technology has greatly improved the performance of wireless systems. Typical multi-channel systems include active phased array systems (MIMO), array imaging systems, and so on. Compared with traditional single-channel systems, the performance of multi-channel systems has been greatly improved. However, the multi-channel system with traditional discrete devices also has the disadvantages of high cost, large volume, high power consumption and poor consistency between channels. It is an inevitable trend for multi-channel systems to design multi-channel chips using highly integrated silicon technology. However, if multiple channels are integrated on the same substrate, the coupling between channels will be aggravated and the performance of multi-channel systems will be affected. This paper mainly studies the coupling between channels and the design of each module in multi-channel chip, so it is of great significance to the development of multi-channel system. The main work of this thesis is as follows: first, the influence of coupling between channels on array imaging system is studied, which is an innovative point of this paper, taking focal plane passive imaging system as an example. Based on the traditional theory, the model of passive array imaging is established, and the influence of coupling between channels on passive array imaging is deduced and proved theoretically. Secondly, several main coupling modes and main factors affecting the coupling between channels are analyzed. According to the analysis results, the influence of adjacent inductors on the coupling between LNA (low noise Amplifier) is modeled, and the theoretical results are derived. This is an innovation of this paper. In order to verify the correctness of the theory, the integrated circuit simulation software cadence electromagnetic field simulation software sonnet collaborative simulation method is used to compare with the theoretical results. Finally, under the guidance of theoretical results, a four-channel receiver is designed and fabricated by using 0.18 渭 m RF CMOS process, and the measured results are compared with the theoretical results. Thirdly, under the guidance of theoretical analysis, the structure of 2GHz four-channel receiving chip is put forward, and the design flow of LNA is put forward on the basis of studying the noise, input matching and gain of LNA, and the simulation and test results are given. Then, the topology and design flow of MIXER are studied, and the simulation and test results are given. Finally, the simulation and test results of 2GHz four-channel receiver are given. 4. In view of the contradiction between reference spurious and locking time, a low spurious and fast locking hybrid PLL frequency synthesizer is proposed based on the traditional bandwidth switching. The hybrid PLL is a traditional single path in transient, the large loop bandwidth PLL, is a double path in steady state, and the small loop bandwidth PLL, is an innovation point in this paper. Finally, in order to verify the correctness of the theory, the hybrid PLL frequency synthesizer is realized by using 0.18 渭 m RF CMOS process, and the test results of PLL are given.
【學(xué)位授予單位】：北京理工大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TN851
【參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 黃進(jìn)芳;劉榮宜;賴文政;石鈞緯;許劍銘;;Chip design of a 5.8-GHz fractional-N frequency synthesizer with a tunable G_m-C loop filter[J];Chinese Physics B;2012年08期
本文編號：2205268
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