无码人妻久久一区二区三区app,久久无码字幕中文久久无码,亚洲人色婷婷成人网站在线观看,亚洲欧美乱综合图片区小说区

Hello! Welcome to the website of Dongguan Youchen Electronic Technology Co., Ltd.

Youchen Technology

Chip Capacitor/Electrolytic Capacitor/Ceramic Capacitor Supplier
18929295505
admin@dgyouchen.com
Current Page: Home > News > Industry news
News

On the working properties and types of antennas

2019-07-23

           antennaAntenna is a type of converter that transforms guided waves propagating on a transmission line into waves propagating in an unbounded medium (usually free space)electromagnetic wave Or make the opposite transformation. stayradio The component in a device used to transmit or receive electromagnetic waves. Radio communicationbroadcast Engineering systems such as television, radar, navigation, electronic countermeasures, remote sensing, radio astronomy, etc. that use electromagnetic waves to transmit information rely on antennas for operation. In addition, when using electromagnetic waves to transmit energy, non signal energyradiation An antenna is also required. Generally, antennas havereversible The same antenna can be used as both a transmitting antenna and a receiving antenna. The basic characteristic parameters for transmitting or receiving the same antenna are the same.

1. PressNature of WorkIt can be divided into transmitting antenna and receiving antenna.

2. PresspurposeIt can be divided into communication antenna, broadcast antenna, Television antenna, radar antenna, etc.

3. According to directionality, it can be divided into omnidirectional antennas and directional antennas.

4. PressWorking wavelengthIt can be divided into ultra long wave antennas, long wave antennas, medium wave antennas, short wave antennas, ultra short wave antennas, microwave antennas, etc.

5. PressStructural form and working principleIt can be divided into line antennas and surface antennas, etc. The characteristic parameters describing the antenna include pattern, directivity coefficient, gain, input impedance, radiation efficiency, polarization, and bandwidth

6. PressdimensionIt can be divided into two types: one-dimensional antenna and two-dimensional antenna

One dimensional antenna: composed of many wires, which are either straight lines used on mobile phones or some clever shapes, like the old rabbit ears used on televisions before the emergence of cables. Monopole and two-stage antennas are the two most basic one-dimensional antennas.

2D antenna: There are various variations, including sheet shape (a square metal), array shape (a bundle of organized 2D patterns), as well as horn shape and disc shape.

7. Antenna according toUsage occasionThe differences can be divided into three categories: handheld antenna, car antenna, and base antenna.

Handheld radio antenna: refers to the antenna used by individuals for handheld walkie talkies, commonly divided into two categories: rubber antenna and rod antenna.

Car antenna: refers to the communication antenna originally designed and installed on vehicles, with the most common and common application being the suction cup antenna. There are also shortened, quarter wavelength, central sensing, five eighth wavelength, and dual half wavelength antennas in the structure of car mounted antennas.

Base station antenna: plays a crucial role in the entire communication system, especially as a communication hub for communication stations. The commonly used base station antennas include fiberglass high gain antennas, four ring array antennas (eight ring array antennas), and directional antennas.
Dongguan Youchen Electronic Technology Co., Ltd
Tel: 0769-85328400 8533526885336465
Fax: 0769-85308615
Email: admin@dgyouchen.com
Website: nndzy.com
Address: Floor 3, No. 7 Xinfeng Road, Shangsha Fourth Industrial Zone, Chang'an Town, Dongguan City, Guangdong Province

Previous Page:Memory module=memory module

Next Page:Why are RF filters becoming increasingly important?
Youchen Technology
Dongguan Youchen Electronic Technology Co., Ltd
Tel: 0769-85328400 8533526885336465
Fax: 0769-85308615
Email: admin@dgyouchen.com
Website: nndzy.com
Address: Floor 3, No. 7 Xinfeng Road, Shangsha Fourth Industrial Zone, Chang'an Town, Dongguan City, Guangdong Province
Yue ICP Bei No. 13008404
All rights reserved:Dongguan Youchen Electronic Technology Co., Ltd
In-line aluminum electrolytic capacitor manufacturer, SMT aluminum electrolytic capacitor manufacturer, direct sales, brand selection, model selection, price
Follow us:

Do you need our help? Welcome to leave your email!
18929295505  
2324774509
admin@dgyouchen.com
漂亮人妻洗澡被公强 日日躁| 欧美熟妇xxxxx欧美老妇不卡| 99精品人妻少妇一区二区| 久久国产精品-国产精品| 樱花影院电视剧免费| 小13箩利洗澡无码免费视频| 人妻免费久久久久久久了| 免费不卡在线观看av| 国产免费丝袜调教视频| 无码av中文一区二区三区桃花岛 | 在线播放无码高潮的视频| 久久丫精品久久丫| 麻豆精品国产精华液好用吗| 美女把尿囗扒开让男人添| 丁香美女社区| 小雪好紧好滑好湿好爽视频| 激情人妻另类人妻伦| 精品国产18久久久久久| 国产日产欧产美韩系列麻豆| 成人午夜特黄aaaaa片男男| 欧美性受xxxx白人性爽| 亚洲日韩精品一区二区三区| 狠狠色噜噜狠狠狠狠97首创麻豆| av无码久久久久不卡蜜桃| ā片在线观看免费观看| 无套内射无矿码免费看黄| 色欲色香天天天综合网www| 亚洲av无码片在线观看| 精品无码久久久久久久久水蜜桃| 国模雨珍浓密毛大尺度150p | 久久精品无码中文字幕| 国模精品一区二区三区| 无线乱码一二三区免费看| 免费观看交性大片| 插我一区二区在线观看| 少妇精品久久久一区二区三区| 国产亚洲成av人片在线观黄桃 | a级国产乱理伦片在线观看| 色一情一乱一伦一区二区三区 | 挺进邻居丰满少妇的身体| 放荡的美妇在线播放|