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14年11个月前
回复于
极客DIY
内容:那么你是否了解在屋里喷满
雷达
的时候人还能不能呆在里面?
JRC海事雷达调制组件
UECMITSUI
3年2个月前
回复于
无线电
内容:海事
雷达
频率一般都是9440MHz,这台也不例外。
自制可玩四旋翼设想,有没人有兴趣?
1211
10年0个月前
回复于
航空技术
内容:悬停可以借鉴这个原理,用超声波
雷达
和红外共同重建周围环境参数。
求大神帮忙,发一个火箭定位器的电路
csaaa
8年11个月前
回复于
电子技术
内容:前者是gps性质的,后者是
雷达
。
消音喇叭
marix
12年11个月前
回复于
极客DIY
内容:你们有没有想过用同样的原理实现
雷达
隐身?
关于雷达隐形的想法
五毒散
14年4个月前
回复于
极客DIY
内容:所谓的主动消音技术,消的似乎是接收端的音吧,它并不能消除发射端所接收的回波的.如果这种技术用在
雷达
隐形方面的话,,,,,情形类似于捂着耳朵偷铃铛,,,,,
长征二号丙一箭八星发射成功,搭载七颗中国民营航天企业甚小卫星
太空来电
6年1个月前
发表于
航天技术
内容:星河一号(Scorpio-1),由成都国星宇航科技有限公司出资,长沙天仪空间科技研究院有限公司(以下简称“天仪研究院”)研制和交付,用于对地光学和
雷达
遥感。,“星河一号”是计划中的“星时代”星座的第一颗遥感业务卫星,该星座计划包含192颗卫星,分布在24个轨道面,包括光学遥感卫星与合成孔径
雷达
(SAR)卫星,实现5m、1m、0.5m级的地面成像覆盖,预期实现分钟级的刷新速率
各位看下这些奇怪的三极管~国产的
samhrc
13年11个月前
回复于
电子技术
内容:这是
雷达
用的,频率不会加热,而且功率也小。
转载,47GHz EME 进展,OK2KKW
RodTech
3年10个月前
回复于
无线电
内容:这个要求已经是接近低频一些的射电
雷达
的要求了。
火箭箭体套件策划中,大家来投个票吧!
rb-sama
4年8个月前
回复于
喷气推进
内容:或者弄个小型多普勒
雷达
和高指向性天线做近炸,用固定翼模型做标靶,小气瓶炸开色粉沾染到固定翼模型飞机上为判定目标,发展成一项运动。
拆飞机了,来高手。
S.D.P
12年5个月前
回复于
喷气推进
内容:没有线传飞控,没有大功率的
雷达
,除了通讯可能还是分立元件的以外,没有太多元件可拆。。。。。
战斗机的隐身技术
wangyuewo56
17年1个月前
回复于
极客DIY
内容:反常吸收指
雷达
电磁波与离子体集体相互作用,在等离子体中形成等离子体波动,从而导致
雷达
电磁波的吸收或部分吸收,达到对
雷达
隐身效果。,与常规被动隐身反
雷达
技术不同。,当外界
雷达
波的频率高于目标等离子的本底频率时,高频
雷达
的波信号进入等离子体,会通过波与带电粒子的相互作用,把波的能量转移到等离子体的带电离子上,从而减少反射回
雷达
站的电磁波信号。,此外,而其最致命的缺点也向其他主动
雷达
隐身技术一样,等离子体自身也向外界辐射大量的电磁波(尤其是本底频率),极容易被敌方采用无缘被动
雷达
所探测,如捷克的“维拉”、美国的“寂静哨兵”反主动隐身
雷达
或者利用,正是因为如此,那种奢望将等离子体覆盖整个机身表面而实现全面主动隐身的想法还不太现实,只能应用在某些局部的
雷达
强反射区(B-2就是将封闭式等离子隐身技术用在机翼前缘、翼尖等
雷达
强回波处,目的是对付远程长波
雷达
探测
DIY【民科牌】X波段射频信号源
GiroPetrenko
4年2个月前
发表于
无线电
内容:测试使用了一个类似HB100的X波段多普勒
雷达
模块,发射接收频率在10GHz左右。,这是经过调整,该
雷达
模块输出的中频信号。
[重来] 5.8GHz 测距雷达
miles
4年9个月前
回复于
无线电
内容:先老老实实抄一个 XXXXXXXXXXXXXXXXXXXXXX/~s53mv/vnr/XXXXXXXXXml 高度表然后你再考虑做FMCW
雷达
2.4GHz频率有点低,换5.8G会好一点,现成的高增益天线一大把
短距毫米波雷达测试成功
虎哥
9年9个月前
回复于
无线电
内容:连续波也可以做
雷达
的,可以调频嘛。
使用航拍套件谨防干扰重要业务导致严重后果
S.D.P
9年1个月前
回复于
无线电
内容:引用 warmonkey:最重要的ADS/B二次
雷达
在1030和1090M,调幅,曼彻斯特编码其次是语音通信118~135.95M,调幅,语音盲降需要108~118M导航台,干扰可能导致导航错误,相对来说最容易中招
这个是僵尸卫星的短波信号吗
永恒之桔
6年6个月前
回复于
无线电
内容:有人说这是天波
雷达
。
出各种模块 元件 开发板...
BG9IPE
4年5个月前
回复于
跳蚤市场
内容:id=45658875877&_u=d2a03ti5e31 ILI9341焊接款带触摸 全新未拆封有两片 不带触摸自己做成模块的有一个 SPI接口 未拆封屏9元一片 拆封模块7元一个激光
雷达
的型号是
将衣服与MP3集成在一起!
orichalcum
15年6个月前
回复于
极客DIY
内容:我曾经想过,搞一个比较复杂的电路,可以探测一定距离内物体的运动,然后用声音告知收听者……探测器用长距离的倒车
雷达
,安装在腰带后面就可以。
【原创】内外兼杀的杀毒软件
玄明
16年0个月前
回复于
极客DIY
内容:病毒感应
雷达
?
FM7F电子管1.2KW短波功放试制
Eetingcandy
2年3个月前
回复于
极客DIY
内容:这个应该不可以做开关管,可以试试以前
雷达
用的闸流管。
自杀式海面打击艇
小强
10年11个月前
回复于
极客DIY
内容:幻痛的心 发表于 2014-2-7 15:32 新版飞豹,性能接近苏-30,
雷达
不开机的情况下,预警机引导发射反舰导弹,鬼子的88舰队只有挨揍的份儿,鬼 ...说下那个某国是哪国吧……我智商不够用了
回 5楼(dctyu) 的帖子
3.1415926
13年11个月前
回复于
电子技术
内容:先不谈接收,磁控管的电压都在KV以上,这样电压的高性能开关器(具有陡峭上升/下降沿,高端商用
雷达
调制器)可不是一般的贵,而且不能调频率,不能QAM调制!
[原创]挑战技术极限——微型制导火箭DIY
普通用户
15年5个月前
回复于
喷气推进
内容:探测和伺服分开做,以后也许会有
雷达
,这也是说不定的事。
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