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
国产丝袜在线精品丝袜| 在线观看亚洲av每日更新| 在办公室被c到呻吟的动态图| 大学生被内谢粉嫩无套| 久久精品国产99久久久| 天堂网在线最新版www中文网| 国产特黄级aaaaa片免| 久久www免费人成一看片| 大地资源网高清在线播放| 亚洲av无一区二区三区久久| 妺妺窝人体色www看人体| 成人a级视频在线播放| 人人妻人人爽人人澡欧美一区| 少妇av一区二区三区无码| 人禽杂交18禁网站免费| 久久97精品久久久久久久不卡| 99久久精品免费看国产| 边做饭边被躁bd苍井空图片| 无码日韩精品一区二区免费暖暖| av无码免费一区二区三区| 日本肥老妇色xxxxx日本老妇| 西西4444www大胆无码| 亚洲熟女综合色一区二区三区| 高清一区二区三区日本久| 国产精品无码无在线观看| 竹菊影视欧美日韩一区二区三区四区五区 | 最近最新中文字幕| 亚洲av日韩av天堂一区二区三区| 亚洲av中文无码乱人伦在线咪咕 | 又色又爽又黄的视频软件app| 精品久久久久久无码免费| 又湿又紧又大又爽a视频国产| 亚洲精品中文字幕乱码三区| 天天爽夜夜爽人人爽| 无码国产激情在线观看| 亚洲中文字幕无码中字| 欧美日韩国产码高清综合人成| 久久精品中文无码资源站| 国产猛烈高潮尖叫视频免费| 免费观看交性大片| 亚洲中文字幕久久久一区|