218 lines
3.5 KiB
Markdown
218 lines
3.5 KiB
Markdown
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---
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title: 60M带宽模块资料分析
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updated: 2022-05-30 02:08:05Z
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created: 2022-05-07 06:27:54Z
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---
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60M带宽模块资料分析
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5k资料费
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一个一中频，4700MHz，二中频140MHz
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预选滤波器、一中频滤波器皆为定制
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一二混频器相同型号，且有超手册指标使用现象
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# 中频带宽
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20MHz/40MHz带宽可用102.4M的采样时钟，带通采样
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60/80MHz带宽需要更高采样时钟
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几种带宽与中频的对应关系如下：
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4700 80MHz 定制
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1209.5 83MHz TA1106A
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70MHz 20MHz TB0186A 现役
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76.8 40MHz 暂无 手册
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140 27MHz 暂无 BB60C
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140 60MHz 856020 曾
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140 40MHz TFS-140AU RSA306B
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150 50MHz TB1004A 暂无
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153.6 80MHz TB1090A 暂无
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150 80MHz TB1047A 暂无
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AD9684/500MSPS
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决定因素之一是成品SAW的型号
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带宽切换用PIN管或AS179-92LF，<250MHz时隔离度>40dB，有国产替代K112
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一中频离射频越远越好，越高的中频需要越宽带的混频器
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# 预选滤波器
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预选滤波器的重叠带宽≥输出中频带宽
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预选滤波器有8路，切换使用PE42420（K251）15/3.6
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预选滤波器组分段情况（扩展到80MHz）
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30 90 ->4700
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90 200 ->4700
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200 450 ->4700
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450 700 ->4700
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700 1000 ->4700
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1000 1400 ->4700
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1400 2000 ->4700
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2000 3000 ->4700
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3000 5200 ->1210
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5200 6000 ->1210
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混频器杂散判断方法
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# 放大器、低噪放
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放大器选择增益平坦的，ADL5541，平坦的增益可以提升模块的增益度指标，降低补偿难度
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宽带的低噪放较少，TSS-53LNB+可工作于0.5-5GHz，可旁路，（TQP3M9037可工作于0.5-6GHz，不可旁路，有国产替代LXK6037，9RMB）
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或可适配预选滤波器的分段进行选型设计
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可调衰减器使用PE43711（SS115）28/7.5
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202106
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6GHz内可选国产TC2106
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# 混频器
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3GHz方案混频器用HMC557ALC4 ，220
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替代方案HMC219B ，60
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MMCI方案IMX-0614， 175
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# 本振源
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PLL最高频率需要到4700+3000=7700MHz，LMX2572只到6GHz，倍频的话就绕弯了，故暂定LMX2594，可到15GHz 250/只
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以此方案为基础的话，混频部分可以独立，因为只有此部分是＞3GHz甚至到8GHz的高频信号
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实测0.8厚、双层FR4（CPWG，0.82/0.19）到8GHz差损约-2dBm/30mm，属于可用状态
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另获悉36*26mm双层RO4350B，8块，250；37*47mm，4层混压，10块，1000 --->表示还是好贵
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# 驱动放大
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- VMMK-2503 60 ，但体积太小 不宜焊接
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- IPA-0520E， 裸片，对标HMC451 136
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- HMC788A 45，10m-10GHz，但偏置需要**锥形电感**，难搞
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- PMA3-83LN+ 60，500m-8GHz
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- [MAAM-011100](../../射频/放大器/VGA.md#MAAM-011100) 65，VGA，400-20GHz，无须电感，但增益小，需要负电-0.5V偏置
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2021.05
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国产TC2106，指标可，到6GHz
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# 处理器
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LMX2574写速率可达75MHz/75Mbits，读速率50MHz，HMC835读写50MHz，
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为提升时间，建议控制端写能力至少达到50MHz；不常回读
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## CPLD版本
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建议主时钟尽量快以提升运算速度，SPI写时速度降为70MHz
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## MCU版本
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STM32F407主频168MHz，IO翻转84MHz，210DMIPS；只有SPI1速度可达42Mbits，SPI2和SPI3只有21Mbits；有DAC口可驱动参考和可调滤波器
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STM32F411主频100MHz，IO翻转100MHz，125DMIPS；有SPI1、SPI4、SPI5可达50Mbits，SPI2、SPI3只有25Mbits；无DAC
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方案一，使用411，全部使用硬件SPI，但数据处理速度可能低；方案二，使用407，对外接口用SPI1，控PLL使用IO口软件模拟
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暂定方案二
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