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约找到 1041 条结果,耗时 0.228 秒
求助:简易的大功率射频发射器的制作
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15年1个月前
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电子技术
内容:FM无线话筒(合法发射功率不超过3毫瓦)当中算功率较大的跟暴力型没得比,2222是小功率管引用第12楼WZB616于2009-12-17 19:39发表的 :大家再看看这个电路,在鬼佬的网站上找的一个
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17年3个月前
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电路、软件的算法等等往往是技术难点。,音频分析部分的镀金线路板图片帖完了,为了不影响测量精度,没有拆卸最关键的
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13年3个月前
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数字频率合成信号发生器DIY:垂直导航雷达DIY:无调谐零中频微波单边带和等幅报收发机DIY:
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ry7740kptv
7年6个月前
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内容:另外转单端后方便用
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15年0个月前
回复于
强激光
内容:将输入直流经晶振变为40MHz,6W
射频
。
再论栅极谐振驱动的理论依据和应用范围
月下孤狼
7年4个月前
回复于
高电压技术
内容://///////////////////////////////////////////////////////////////////////////////////// 要想驱动管子(不管是
射频
管还是像,////////////////////////////////////////////////////////////////////////////////////////// 谐振是必须的,
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功率放大器的各个级之间的匹配大多是窄带的,然而
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行业内的人根本不会提到谐振驱动这个词,因为谐振驱动在高频领域已经是默认的东西了。。。,///////////////////////////////////////////////////////////////////////////////////总结一句,要看谐振驱动技术,去看看
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功率放大器的书籍
招聘电子硬件研发工程师(远程弹性工作)
沉默_羔羊
3年8个月前
回复于
会员海报
内容:开关电源只做过小功率反激(100W以内)
射频
很早以前做过功放的调试工作,只能说是有一些了解HIFI一直都是爱好,从集成模拟/D类到分立晶体管/电子管都有DIY过、C语言基本会写,目前公司几款产品子模块程序是我独自完成的
扫盲帖:网络分析与网络分析仪
虎哥
11年8个月前
发表于
仪器仪表
内容:
射频
通信领域常说的“网络分析”,就是这种以端口为界,描绘
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电路性能的工作。,事实上人们发明了一整套使用S参数的办法,能够极大的简化
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电路设计。,例如检验天线、电缆、分路器等
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器件。,网络分析和网络分析仪是设计、调试、改进
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电路的最基本,同时也应该是最常用的手段和工具。,掌握网络分析技术之后,
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通信电路的设计制作将更加富有趣味。
关于刷卡机的小改进
玄明
11年0个月前
发表于
极客DIY
内容:
射频
卡(RFID)刷卡是现代生活中一种很常见的操作,例如门禁、食堂、公交、停车等,但刷卡机的位置常常让刷卡操作不是很方便。
PCB上射频线转弯和嘉立创PCB高频性能的实测(增加过孔测试图)
量子隧道
7年8个月前
回复于
电子技术
内容:话说VNA就是测
射频
的,为啥要那么照顾低频呢?
[转帖]详拆美军单兵通信设备-摩托罗拉SABER对讲机
硝化咸鱼
12年9个月前
发表于
无线电
内容:因为对讲机所处的高度很低由于地面物体遮挡和天线增益小等原因,所以两台对讲机之间的直接通讯距离就非常有限,这个时候就需要在高处设置中继站,中继站的功能是,在高处接收对讲机发射的信号并且同时转发,但是中继站的接收频率和发
射频
率不能在相同的频率上,,否则会引起自激,所以中继站的接收频率和发
射频
率是不同的,也就是有一个上行频率和一个下行频率,这样对讲机要跟中继站通信就需要在中继站的下行发
射频
率上接收信号,在中继的上行接收频率上发射信号,倒频的功能就是交换接收和发
射频
率,,这样当两台对讲机距离中继距离较远无法打开中继且两台机器相距较近可直接通信的时候,可以有一台翻转收发频率,在原来的接收频率上发射在发
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率上接收,这样就可以脱离中继做到两台机器直接通信了。
KC9603系列实验用中功率放大器
kcma
1年11个月前
专栏文章
科创仪表
内容:KC9603A覆盖1MHz~1GHz的放大器,最大
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功率0.5W。
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11个月前
发表于
无线电
内容:page=1 贴,深受启发,也想做一个,无奈smith同学用的KiCAD,也省了好多输入
射频
开关,想自己加上去,我又不会kicad,只会AD,我拿sdrplay 发布的公开原理图也画了一版AD版的完整图纸
受论坛smith影响做sdrplay,我也自己画了一版完整版的sdrplay RSP1A,公开原理图和PCB_GERBER
fei666888
3年10个月前
发表于
无线电
动手实践: 实验报导
内容:page=1 贴,深受启发,也想做一个,无奈smith同学用的KiCAD,也省了好多输入
射频
开关,想自己加上去,我又不会kicad,我拿手上的sdrplay RSP1A 拆了尝了尝 逆向了一下原理图也顺手画了
一种 自激振荡差分全桥D类 音频功率放大器
量子隧道
9年10个月前
发表于
电子技术
内容:C,D类一般是非线性放大,一般用于
射频
电路。
我的特斯拉线圈[貌似发错版了]
welcome1976
13年11个月前
回复于
高电压技术
内容:看电路电感元件应该不会上500KHZ以上,频率低穿透性不会很高,用低频频率计应该可以在5-10米非线性状态下测出发
射频
率,电路高压放电能在空气中电离子程蓝色放电粒子,说明放电过程色温在10000K,低频高色谱接近人眼将近不能看见的状态
讨论如何去DIY一套无线电测向系统(315M进行中)无线电爱好者请现身指导
jrcsh
13年7个月前
回复于
无线电
内容:要想效果好就直接用混频模块,
射频
切换器等。
探讨一下如何测量天线的阻抗
cddhb88
13年0个月前
回复于
电子技术
内容:因为是检波二极管得到的
射频
电压和相位值。
传说中的破马5291A低热可伸缩香蕉头测试线
RodTech
10年3个月前
回复于
仪器仪表
内容:然而,不要把这个东西看做音响发烧电缆/不必要品牌货,或许很少人能真正用到它的性能,但是在许多不如
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微波等那么有名的专业测试领域,这种线是生活必需品。
关于组建个人电子技术实验室装备的一些探讨
德律风根
14年5个月前
回复于
电子技术
内容:示波器的话,建议要两台,数字的做单片机用,模拟的做电源啊
射频
啊之类的用。
出 绿激光器,IGBT,光纤微波转换器
adj1202
9年2个月前
发表于
跳蚤市场
内容:微波转光纤信号转换器 具体参数不详 研究所里出来的东西, 有人要吗 内部有一块特种材质的PCB,很亮,里面元件数量不多 一个尾纤激光器,尾纤激光器的另一端被云母片封闭了焊接在板子上的,看不到是什么
射频
频率范围
高性能遥控器、火箭点火控制器KC107发售帖
科创供销
5年4个月前
发表于
喷气推进
会员海报
内容:实测遥控距离:
射频
发射功率可设定为:微、小、中、高。
[重来] 5.8GHz 测距雷达
GiroPetrenko
4年9个月前
回复于
无线电
内容:我认为“在做东西的过程中学习了解
射频
器件和系统的特性”是可行的。
一个变态的无线电爱好者要看这些书 zt
立棍
12年7个月前
回复于
无线电
内容:《宽带匹配网络的理论与设计 (增订本)》13.8兆《无线电波传播》1059页《无线通信常用数据手册(修订本)[1].part1》680页《现代电信交换》396页《dds9851频率合成器》《大功率宽带
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脉冲功率放大器设计,》《57704uh三菱
射频
功放模块》《67741h三菱
射频
功放模块》《67741l三菱
射频
功放模块》《96834_MITSUBISHI_QM30HC-2H(三菱模块)》《ct60AM三极管》《IRFBC40,管参数》《M68702L东芝
射频
功放模块》《MRF317
射频
功放管参数》《MRF392
射频
功放管参数》《MRF464
射频
功放管参数》《S-AU27东芝
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功放模块》《S-AU57东芝
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功放模块》《TA7805,》《
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收发转换用MI402-开关二极管》《
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收发转换用开关管比较1》《
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收发转换用开关管比较2》《实用晶体管电路设计》327页《世界电子管电路手册》776页《世界电子管手册(上册)》498页《世界电子管手册,》《HL-37V
射频
功放电路图(晶体管)》《HL-82V
射频
功放电路图(晶体管)》《IC集成电路应用手册_10185782》327页《mc145163频率合成器应用资料》《NE602使用资料》《TS440S
拆解 835VQM离子阱质谱仪
Arutoria
15天3时前
发表于
拆机鉴赏
仪器仪表
内容:我们在过渡板上施加一个小的RF信号,并在一定的频率范围内扫描,当到达某一种离子的喷射阈值时,该种离子被选择性激发和喷射并离开离子阱 离子的喷
射频
率严格地正比于质荷比平方根的倒数,因此有fₑ=K/sqrt,(M/q);所以我们在某一固定频率范围内施加
射频
信号可以将对应范围质量数的离子分别喷射出阱,从而实现一定范围内的质量扫描。
关于TC442X芯片在高频小特斯拉线圈上的应用探索
rb-sama
8年8个月前
回复于
高电压技术
内容:NPN型的直接到地,而PNP型的需要一个退耦电容把
射频
地短接。
请教监测用接收机设计思路。
闲着会生病的
9年3个月前
回复于
无线电
内容:反正我是一般先问一下R&S或安捷伦有没有解决方案,自由度高一点可以试试NI的
射频
板卡。
使用USRP监测USB 3.0对于2.4GHz ISM频段的干扰
justinpiggy
7年9个月前
发表于
仪器仪表
内容:我推测是由于这个转接器屏蔽性能不好,导致泄漏的
射频
信号干扰WiFi。
场管最大开关频率计算
pankewen
14年8个月前
回复于
电子技术
内容:只要有合适的
射频
匹配和阻抗变换,能在计算匹配时把这些电容巧妙地计算在内,并尽量降低电路阻抗以与大电容匹配,也能获得很大的功率增益。
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