• <tr id="ooooo"></tr>
        • 久久久WWW成人免费精品,性史性农村dvd毛片,国产激爽爽爽大片在线观看 ,免费精品国产自产拍在线观看图片,亚洲视频中文字幕,欧美激情一区二区久久久,亚洲欧美丝袜精品久久中文字幕 ,免费高清特级毛片A片
          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: www.bjjinhe.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: www.bjjinhe.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!
          Subscription
          18929295505  
          2324774509
          admin@dgyouchen.com
          主站蜘蛛池模板: 国产亚洲国产精品二区| 久久久久久亚洲AV无码专区高潮| 日韩中文字幕不卡网站| 2020久久国产综合精品swag| 欧美日韩高清在线| 99久久人人爽亚洲精品美女 | 韩国免费A级毛片久久| 久久久国产精品人人片| 思思久久精品一本到99热| 亚洲人成网站18禁止大| 青青草成人在线视频免费观看| 一区二区不卡国产精品| 中文字幕有码在线观看| 手机在线观看h中文字幕| 蜜芽国产成人精品区| 国产青草亚洲香蕉精品久久 | 91中文字幕在线观看| 特黄一级| 欧美中文字幕无线码视频 | 一本精品99久久精品77| 欧美不卡视频一区二区三区| 欧美熟妇a片在线a片视频| 亚洲日本乱码在线观看| 扒开双腿猛进入喷水高潮叫声| 亚洲 综合 校园 欧美 制服| 偷窥村妇洗澡毛毛多| 国产欧美精品亚洲桃花岛| 亚洲视频在线播放免费视频| 中文国产成人精品久久APP| 成人免费午间影院在线观看| 麻豆激情在线免费观看视频| 日韩一卡2卡3卡4卡新区亚洲| 韩国中文字幕轮理天堂| 国产高清精品在线91| 精选国产av精选一区二区三区| 中文字幕久无码免费久久| 国产久热免费观看视频| 护士张开腿被奷日出白浆| 韩国三级在线 中文字幕 无码| 国产无码精品在线播放| 日韩欧美国产亚洲中文|