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的低通滤波器。
各位看下这些奇怪的三极管~国产的
布布卡
13年11个月前
回复于
电子技术
内容:电子管做
射频
功放很简单 我正在做一个200w的(如果有钱买更好的管子 可以到2kw)
KC761能谱仪日常进度(含设计变更公告)专用帖
阡陌徘徊
2年1个月前
回复于
核技术与核仪器
内容:那个噪声都看不下去了,任何地方都会有干扰进去,用的都是
射频
铝盒那种铣削的盒子,现在打算里面加一层坡莫合金罩子。
求助:简易的大功率射频发射器的制作
3.1415926
13年0个月前
回复于
电子技术
内容:有没有算过,
射频
输出10w,电源大概用?
【KS-5C】第一部分 扫频信号源 介绍以及实现
造化为工
4年7个月前
回复于
极客DIY
电子技术
内容:只看了看
射频
建议把mixer和balun靠近PLL,让差分走线尽量短。
【V】KC901V-6.8GHz射频多用表内测版发货已完成
量子隧道
7年8个月前
回复于
会员海报
内容:还包含透射端口的反射波经过DUT的S12返回给
射频
输出端口的)。
[重来] 5.8GHz 测距雷达
GiroPetrenko
4年9个月前
回复于
无线电
内容:(因为HMC431很贵啊)3:
射频
部分,未作太大更改。
距离可达50cm的无线输电
NoxTyrannus
12年11个月前
回复于
电子技术
内容:单端激励谐振……无误,美国人的效率85%不知道他的是多少……提示,合理利用
射频
技术及调制相关电路知识……
wifi有这么大的发射功率吗 竟被灼伤
北落师门
8年11个月前
回复于
电子技术
内容:如果是大功率
射频
的确会对皮肤有灼烧感,wifi估计频率接近微波炉的工作频率,加热水的效率非常高。
RF功率的测量和控制-英文资料
mass_lynnxy
16年3个月前
发表于
电子技术
内容:这一信号随后会被混合成一个中频(IF),并会在被最后混合成最终
射频
(RF)之前过滤。
玩pll被电后遗症求助
usafn6132
9年2个月前
回复于
高电压技术
内容:引用 改装pcp:玩
射频
的也厉害,靠近谐震线圈的手指都好像被火烧。
距离可达50cm的无线输电
好酷
12年11个月前
回复于
电子技术
内容:效率取决于天线是否斜振+波瓣是否够尖锐+旁瓣是否少+波瓣指向方向是否够精确和
射频
IC卡供电没啥区别。
[图纸技术] 发现一个超小单管特斯拉线圈的驱动电路!
北落师门
9年3个月前
回复于
高电压技术
内容:貌似不太找得到这么高压的
射频
管
手机能不能去除发射接受单元只留下闹钟功能?
nmjnsjj
16年6个月前
回复于
电子技术
内容:我想还是拆掉
射频
电路比较可行。
请教一下关于GPRS模块天线匹配的问题
yaozhiyu
4年5个月前
发表于
无线电
内容:本人
射频
电路没什么经验,现在工作中的一个项目用到GPRS的模块,外接天线,画板的时候没考虑那么多,天线的SMA座直接贴着模块的RF输出引脚引出,距离很短,就没放匹配电路,不知这样会不会有问题。
DIY了一台养眼的SDR接收机
ehco
11年11个月前
发表于
无线电
内容:音频输出:2x10W数字功放+立体声扬声器无线电配置:SDR
射频
芯片:E4000LNA:0.1M-2G +20dBATT:0-30dB软件配置:SDR#HDSDR
wifi有这么大的发射功率吗 竟被灼伤
1211
8年7个月前
回复于
电子技术
内容:家用路由器的
射频
功率任何情况下也不会灼伤皮肤。
求教:如何制作产生电场器件
闲着会生病的
9年4个月前
回复于
电子技术
内容:取决于
射频
功放输出连接什么设备。
受论坛smith影响做sdrplay,我也自己画了一版完整版的sdrplay 1,公开原理图和PCB图
actionchen
4年10个月前
回复于
无线电
内容:因为
射频
部分就够折腾好久了的,而且人家用的4层板,业余自己搞舍得打4层板吗?
新坑:基于AD9361的手持监测侦察接收机
RodTech
7年3个月前
回复于
无线电
内容:引用 虎哥:最近同学们在制作
射频
板PCB,目前元件已经摆放好了,估计下周有希望发给厂里。
如何设计一款适合大范围中继联网的轻量级数字通信协议
虎哥
3年5个月前
回复于
无线电
内容:这个系统最多只能占用4对/8个25kHz信道,双向总共200kHz
射频
带宽。,但若存在长链,就得留下若干个等待时隙,于是传输时间就非常短,
射频
带宽很可能就不够用,灵敏度也会大打折扣。
老美TSP对KC901V进行了测评
量子隧道
3年4个月前
回复于
仪器仪表
内容:位于
射频
板左上方两个SMA连接器之间。,3,S11模式下,
射频
功率进入电桥前会过一个貌似威尔金森功分器的分叉。
出新锐10w二氧化碳射频激光
苦丁茶
8年2个月前
回复于
跳蚤市场
内容:引用 tc_learner:这个其实是
射频
电能驱动的二氧化碳激光,波长一样是10.6um左右的中红外吧是,和玻璃管一样的波长,24v供电方便一些
受论坛smith影响做sdrplay,我也自己画了一版完整版的sdrplay 1,公开原理图和PCB图
actionchen
4年9个月前
回复于
无线电
内容:kiwiSDR因为他是短波段30M直采,所以
射频
前面给个低通滤波就完事。
最近在家里找到一个东西酷似火箭喷嘴拿出来和大家讨论讨论这个东西怎么样?
S.D.P
12年4个月前
回复于
喷气推进
内容:F头的
射频
线头,一般是75欧姆的闭路电视线用。。。。
[绿色化学][文献]高效率电弧法固氮的探索实验
肖特基的救赎
2个月7天前
回复于
化工矿冶
内容:另外,不明白为什么都要执着于
射频
等离子体之类的高端设备,虽然zvs简陋可控性低但是其鲁棒性和低匝比要求使其很符合业余小规模生产的情境;关于装置寿命其实也不用过于纠结,此类小规模生产基本每天都要做维护,只要简化装置降低成本就不是什么问题
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