As a kind of radio wave, 制鄉the millimeter wave in the past was in議筆conspicuous in the past. Compared wit動人h its lower frequency microwave, the t訊懂ransmission distance is farther, a志個nd it has great achievements慢拿 in the field of communication. Th妹匠ere are millimeter waves in the mi森什ddle that no one cares about.頻人

However, at some poin制下t, mmWave suddenly became the focus通道 of everyone's attention.

The popular fried chicken o筆資n the tuyere

If you want to talk 自空about what the air outlets are in toda工一y's era, I belie船話ve everyone will blu湖見rt out terms such as 5G, a錯和utonomous driving, artificial in刀慢telligence, etc. What is not wel多拍l-known to the public is that the輛兒se outlets use a technology called &些訊quot;millimeter wave".

From this, it can be seen that this &qu但近ot;wave" called millimeter wave日空 is a tuyere in the tuyere, a河錯nd it is difficult to think whethe兵為r it is popular or not.

Millimeter waves generally ref河時er to electromagnetic wave生但s with a wavelength of 1-10 mm. Milli媽為meter waves have extremely high bandwi電數dth, and the total avai內水lable bandwidth is as high as個議 135GHz, which is five times th報音e bandwidth of traditional microwave ba服日nds. force;

Secondly, the beam of the畫器 millimeter wave is 化信very narrow, which can more acc身年urately distinguish the target and res草校tore the details of the targe票聽t;

Compared with lasers, mill話暗imeter waves have lower climate req腦線uirements. Compared wi厭通th microwaves, millime老什ter wave components are s我裡maller in size, and millimeter wave de草器vices are easier to mi校區niaturize.

However, millimeter waves also黑討 have the disadvantages of severe atten黑亮uation and high requirement為討s for device precision. It is the他間se two shortcomings that have restr為分icted the development of millime請知ter waves in the past.

Millimeter wave, the seco很冷nd half of the 5G equipment com些雨petition

The global 5G network freq子舞uency band is divide數遠d into Sub-6GHz and millimeter wave, 風訊and my country has put th呢美e 5G millimeter wave network 裡個construction on the 多大agenda when the 5G Su可農b-6GHz network constructio音水n is basically matur這開e.

Some people may have doubts, since b兵要oth Sub-6GHz and milli懂秒meter wave can realize 5是子G, and Sub-6GHz is mature事現, why is it necessary to build mill吧又imeter wave?

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In fact, millimeter wave and Sub-6GHz理暗 can form a complementary rel畫好ationship. The frequency band of 銀腦5G millimeter wave is 24GHz-86GHz, 子到which is about 16 times that of Sub-6G志土Hz frequency band, so the tra喝暗nsmission speed and con用師tent will be much faster; also be筆視cause of the high frequency 愛冷band, 5G The propagation range 都房of mmWave is also much smalle現離r than that of Sub-6GHz友男.

Therefore, 5G millimeter wave is又現 suitable for use in the same爸生 area, at the same time, and a larg相拍e number of users such鄉在 as stations, airports, and stadium紙暗s, while Sub-6GHz is suitable for use 器歌in long-distance and ope藍近n places.

Whoever is the first to complete t雪音he 5G millimeter wave con匠跳struction will be able to provide us司河ers with faster and more stable Intern歌多et services, and will 道報win the second half of the 5G co身她mpetition.

Autonomous driving, mi吧得llimeter wave radar shows i呢員ts talents

People have predicted that th算也e Internet will be followed地道 by the Internet of Things era, and mil冷商limeter-wave radar is是花 the "ears" and "ey農如es" of the Intern什外et of Things era. It has 從唱rich application prosp窗高ects in many fields such as 從身border defense, agriculture, a在放nd medical care. Among them, the mo金新st popular is the application in the 費那field of unmanned drivi書著ng.

The millimeter wave radar, like ordi門拿nary radar, sends out radio waves, the跳件n receives the echoes, and meas國喝ures the position data of the target 秒有according to the time d行多ifference between sending a少是nd receiving.

Millimeter waves can help the car accur民腦ately perceive the surrounding裡為 environment, and quickly identify慢兒 the distance, angle, speed and 大草other data of the su下商rrounding objects and區來 the car, so as to ensure the safe driv木喝ing of the car.

And because millimeter waves are國習 less affected by bad weat計農her such as rain, sn著器ow, and haze, millimet房時er waves can operate 上時around the clock and窗見 have high stability, making th議關em the best choice for對道 IoT devices such as autonomo得服us driving.

Wireless screen projection, 公少the most perceptible scene at presen務就t

Perhaps the changes in the 5G band土微 are difficult to perceive, and我妹 autonomous driving is too far away線高. Currently, it is sti見議ll living in a sci-f畫如i movie, and wireless projection 數答is an application and technology亮明 that is closer to us.

The recently emerging mill兒服imeter wave wireless screen proje大近ctor effectively solves the probl很報em of video and audio 農拿air-dropping.

The traditional Wi-Fi screen proje匠員ction and LAN screen proje來暗ction have high latency, unclear pictu志還re quality, and intermittent signals還服, which are only "usab做又le", and the mil吃科limeter wave wireless少服 screen projection device can replace 頻購HDMI to a certain extent. The d看議ata cable meets the requirement長煙s of smooth office use.

Taking Greenlink's "Nebu木長la Watcher" as an example, i作務t adopts 60GHz millimeter wave 子理transmission, the rate reaches 3地冷.96Gbps, and the tra紙東nsmission speed reaches 480MB/靜輛s, which is equivalent to the tra志民nsmission speed of USB3.0 a用讀nd HDMI 1.0.

Thanks to the advantages說光 of strong anti-interference ability of電是 millimeter wave, it can also transmit 藍玩4K@30Hz pictures stab體睡ly in large conferences an遠飛d confined places, and the 來拿flexibility of use is enhanced afte錯市r getting rid of the shackle很紅s of cables.

Although it is not widely use愛商d yet, as the public&#中通39;s requirements for pictu習東re quality are getting higher and h村服igher, and the usage話文 scenarios are becoming more random an白好d complex, millimeter-wave wireless scr亮笑een projectors will also 你店have a wider space for use.

From: Blockchain Talk