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站,起初我们以为是天文台 蟒蛇洞 这是可以接到甘冽的清泉 山顶壮阔的景象,虽然只有300.8m
DIY【民科牌】X波段射频信号源
该用户不需要名字
4年2个月前
回复于
无线电
内容:接收的信号直接送入混频器,和功分器里面的信号混合然后整出个多普勒
雷达
,直接观测混频结果的低频就行了。
测试大能量脉冲电容
虎哥
5年10个月前
回复于
高电压技术
内容:如果没算错的话,假如这些电容在1us之内把能量全部释放出去,功率也只有数十兆瓦,这大概是一台古代大功率
雷达
的脉冲功率。,但似乎
雷达
并不能很容易的烧坏几百米之外的电器,即使它的天线还有数十dB增益。,我就提着频谱仪被一台脉冲功率100kW的
雷达
照过,大概距离几十米,啥都没烧坏,但后来军方的人说,没烧坏只能算幸运,他们就烧坏过。
激光灭蚊器的设想
空中米格
15年4个月前
发表于
强激光
内容:就像
雷达
跟踪飞机,然后用高射炮击落飞机,这套装置不用计算炮弹提前量,就是小型化有点困难啊。
[原创]边干边写之——用STC51控制TFT(有图有视频)。。。
kknd
12年0个月前
回复于
电子技术
内容:正好写个
雷达
玩玩。。。
谷歌Lunar X 奖第一个将机器人送上月球表面的团队将获得2亿美元大额奖金
1007643735
10年5个月前
回复于
喷气推进
内容:数据传输可以借助官方的大型
雷达
站
大家来看看这个二极管,2DV27B
samhrc
12年4个月前
回复于
电子技术
内容:
雷达
接收机的混频二极管,螺纹是拧在波导管里的。
真的没有办法了.求助判断妖怪管.
虎哥
11年8个月前
回复于
电子技术
内容:一个带控制器的民用
雷达
,还是需要比较高的可靠性。
【KS-5C】第一部分 扫频信号源 介绍以及实现
GiroPetrenko
4年8个月前
回复于
极客DIY
电子技术
内容:这个波形完美符合了在FMCW
雷达
用所需的应用,无需扫频中途的校准线性度也非常好。
有没有近场定位、测距的好方法?
caterpilar
10年4个月前
回复于
电子技术
内容:香皂火箭q 发表于 2014-9-5 18:54 无线电模块 一个发射一个接受 接收时的
雷达
两面装铝箔,聚集信号 是的,俺在学
用货轮给军舰护航如何?
西北蝎子
13年4个月前
发表于
极客DIY
内容: 法国“飞鱼”导弹在1982年英阿马岛之战中,阿根廷的两架“超级军旗式”飞机在躲过了英国“谢菲尔德号”驱逐舰的
雷达
观测,在距离目标45公里时投下了2枚AM—39“飞鱼”导弹。,“飞鱼”导弹严格按照运载飞机的指挥飞行,在距离目标大约10公里的时候,自动由15米高度降到0.5~3米掠海面飞行,并开始由导弹自身的
雷达
装置导航而接近目标,一举击沉了被称之为“皇家的骄傲”的英国现代化驱逐舰
1983年的老书:小火箭人工降雨
我说要有光
8年4个月前
回复于
喷气推进
内容:如果使用现代气象
雷达
测量云层高度,并设定对应引爆时间,应该能起到更大效果
星火计划 (用了一个寒假发射的探空气球)
富二代创始人
9年9个月前
回复于
航空技术
内容:铝箔能反射
雷达
信号?
请问汽车的自动驾驶现在到什么地步了
烈山晚荣
15年8个月前
回复于
极客DIY
内容:要是完全根据地图自动驾驶会发生交通事故的车载
雷达
?
随身自行车道的改进?
boldness123
15年1个月前
回复于
极客DIY
内容:我不认为激光比LED便宜 同时LED寿命也更长 照明效果更好用激光判断车前路况就像用
雷达
探测车前路况一样多余
野外露营的防身红外雷达,谁能造出来?
fishender
9年8个月前
回复于
极客DIY
内容:
雷达
能在几公里外发现行人,玩意对方是土匪或者恐怖分子呢?
弱弱问下,自制飞行器限高多少米
power_rdx
15年0个月前
回复于
喷气推进
内容:看你的飞行器会不会被
雷达
探测到了。
无缝钢管,求发动机长度及打孔方法..
lovehongkong
15年3个月前
回复于
喷气推进
内容:[s:249] 其实我比较害怕会不会被
雷达
发现...
[转帖]科学家们成功发明“隐形斗篷”
全能杀手
17年11个月前
回复于
极客DIY
内容:物质波
雷达
。
回 8楼(l2930) 的帖子
古人
12年8个月前
回复于
极客DIY
内容:打算搞一台研究研究看看什么原理,貌似是一种准精度3D成像
雷达
,但不知道是如何降低成本到这么便宜的。
不锈钢丝网能否作为反射面
全能杀手
17年8个月前
回复于
电子技术
内容:汗 只是说下 我做
雷达
干什么 ~~~ 不过磁控管是个好东西 微波炉太贵 我这有磁控管卖的 70元 不过在微波没学好之前还是不能碰
回 6楼(布布卡) 的帖子
badboy-fly
11年5个月前
回复于
电子技术
内容:我的想法是不是这样啊……我是想以那个火箭弹为基础将电脑监控移到手机上……然后去掉发射台用来做
雷达
监控周围移动的物体……
一种隐形飞机的构想
宅人
11年10个月前
回复于
极客DIY
内容:等到科技发展到可以制造出你那玩意儿时,类似于
雷达
的探测器早就能探测到相当小的东东了。。。。。
开大坑:UHF FMCW 二维搜索雷达
miles
5年2个月前
回复于
无线电
内容:(你要做预警
雷达
我不反对)用433频点估计中频基本接近直流了,最次也得选个2.4GHz,频率越高分辨率越高,当然探测距离会缩水
使用ADI的RF DAC制作高端无线军用干扰机
虎哥
3年10个月前
回复于
无线电
内容:楼主的帖子暗示自己是给军方搞
雷达
干扰的,应该不缺这点钱吧,买PXIE5831比较合适。
这个是僵尸卫星的短波信号吗
虎哥
6年6个月前
回复于
无线电
内容:最可能是电离层测试站的测试信号,也不排除某种超远程警戒
雷达
之类。
今日开坑功能最变态的测速器
迪纳米斯
7年10个月前
回复于
电磁炮
内容:莫非是多普勒
雷达
?
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