As a kind of radio wave, the 工她millimeter wave in the past w為吧as inconspicuous in the past. Com嗎又pared with its lower frequency靜水 microwave, the transmission dist用兵ance is farther, and it has great a多微chievements in the field從城 of communication. There are mill機文imeter waves in the middle that化麗 no one cares about.

However, at some poin冷妹t, mmWave suddenly b秒子ecame the focus of ever員大yone's attention.

The popular fried chi務技cken on the tuyere

If you want to talk 物微about what the air ou海離tlets are in today's era,制話 I believe everyone will blurt ou師機t terms such as 5G, autonomous高遠 driving, artificial 到路intelligence, etc. What is n嗎拍ot well-known to the public is報看 that these outlets use a technology技廠 called "millimeter wave".

From this, it can be seen that this &厭信quot;wave" called millimeter wave 我訊is a tuyere in the tuyere, and i農爸t is difficult to think whethe草吧r it is popular or not.

Millimeter waves gene的短rally refer to electromagnetic wa房南ves with a wavelength of 1-坐懂10 mm. Millimeter waves have extrem媽飛ely high bandwidth, an水民d the total available ban靜問dwidth is as high as 開了135GHz, which is five t路秒imes the bandwidth of tradi朋生tional microwave bands.就照 force;

Secondly, the beam of the milli器的meter wave is very narrow, 靜業which can more accurately distinguish t爸笑he target and restore the detai電鐘ls of the target;

Compared with lasers, millimeter謝又 waves have lower climate requiremen音相ts. Compared with microwav文得es, millimeter wave compone站刀nts are smaller in size, a水聽nd millimeter wave devices 影小are easier to miniaturize.

However, millimeter waves also have商場 the disadvantages of sever微船e attenuation and high requirements f用見or device precision. It i的中s these two shortcomings that have音信 restricted the development of millim謝書eter waves in the past.

Millimeter wave, the請化 second half of the 5G話章 equipment competition

The global 5G network frequenc算飛y band is divided into Sub-6GHz a空在nd millimeter wave, and my 那務country has put the 5G millimeter wave 機風network construction on the agenda w但文hen the 5G Sub-6GHz n技爸etwork construction 數事is basically mature.

Some people may have do拍雨ubts, since both Sub離訊-6GHz and millimeter wave can realize 月文5G, and Sub-6GHz is matu司年re, why is it necessary to b輛討uild millimeter wave?

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In fact, millimeter wave and Sub-6GH近西z can form a complementary relationsh笑笑ip. The frequency band of 5木舊G millimeter wave is 24GHz-86GHz, w樹鐘hich is about 16 times會河 that of Sub-6GHz frequency 很煙band, so the transmission s老理peed and content will be much西綠 faster; also because 很頻of the high frequency band, 5什內G The propagation range of mmWave哥黃 is also much smaller than相計 that of Sub-6GHz.

Therefore, 5G millimeter wave is suit草為able for use in the same area, at 慢城the same time, and a large 空著number of users such a林離s stations, airports黃如, and stadiums, while Sub-6GHz is suit上月able for use in long-dista去技nce and open places.

Whoever is the first to compl海到ete the 5G millimeter 雪月wave construction will be able水分 to provide users with faster著睡 and more stable Internet services, 小友and will win the second half of the 5制亮G competition.

Autonomous driving, millimeter wave ra員科dar shows its talents

People have predicted that the Interne時公t will be followed by the東司 Internet of Things era, 刀玩and millimeter-wave radar is也那 the "ears" and &quo放日t;eyes" of the Internet of Thi跳長ngs era. It has rich application p她照rospects in many fields such a火懂s border defense, agricu兒民lture, and medical c喝理are. Among them, the most popular 近動is the application in the field of un吧光manned driving.

The millimeter wave radar, like ord計自inary radar, sends out radio wa老歌ves, then receives the echoes, and me黃畫asures the position data of the這就 target according to the time diffe亮弟rence between sending and r算兒eceiving.

Millimeter waves can help the car從員 accurately perceive分鄉 the surrounding enviro黃黃nment, and quickly identify t靜近he distance, angle, speed and other 靜上data of the surrounding objec少花ts and the car, so as to ensure th你河e safe driving of the car.

And because millimeter 拿西waves are less affected by ba熱草d weather such as ra低通in, snow, and haze, millimeter中藍 waves can operate ar你會ound the clock and have high stab鄉是ility, making them the best 月新choice for IoT devices s長廠uch as autonomous drivin爸森g.

Wireless screen projection, t姐亮he most perceptible scene a金東t present

Perhaps the changes in the 5G b分事and are difficult to perceive, and 笑火autonomous driving is too far away. 現有Currently, it is still living in務路 a sci-fi movie, and wireless projecti風黑on is an application and techn如鐘ology that is closer to us.

The recently emerging millimeter唱錢 wave wireless screen pro物區jector effectively solves the p唱商roblem of video and audio air-dr北家opping.

The traditional Wi-Fi sc會又reen projection and LAN screen proje懂林ction have high latency,山事 unclear picture quality, and intermitt不書ent signals, which are only "usabl票呢e", and the millimet還也er wave wireless screen數愛 projection device can r放雪eplace HDMI to a certain exten銀師t. The data cable meets the requ喝器irements of smooth office use.

Taking Greenlink's吃鐵 "Nebula Watcher"下黃; as an example, it adopts 60GHz mill街都imeter wave transmission, the rate 文土reaches 3.96Gbps, and the transmission 能船speed reaches 480MB/s, w白月hich is equivalent to the transmi就南ssion speed of USB3.0 and HDMI 1.0.

Thanks to the advantages o場坐f strong anti-interference ability of吃算 millimeter wave, it can also tran些科smit 4K@30Hz pictures stably in l從山arge conferences and confined places日會, and the flexibility 文輛of use is enhanced after getting rid 南司of the shackles of cables.

Although it is not widely used yet場東, as the public's requirement快低s for picture quality are g綠著etting higher and higher, and the u有司sage scenarios are becoming mor樹他e random and complex, mill關裡imeter-wave wireless screen projectors匠雪 will also have a wider space fo事麗r use.

From: Blockchain Talk