#5G equipment room insulation

[giazhou1]

As a major energy consumer of the 5G network, 5G base stations reduce their energy consumption, carbon emissions, equipment heat generation, equipment temperature, equipment noise, operating costs, etc., which are of great value to the development and application of 5G networks. Analyze the main problems faced by 5G base stations, and discuss the energy saving and heat dissipation and cooling technical solutions of 5G base station systems from the perspective of improving and improving the power quality of 5G base stations and the needs to reduce energy consumption, carbon emissions, temperature, noise, and costs.

[xtruss]

Asian Century Began in May 2020

Region has emerged as an economic zone as closely integrated as the European Union

By David Goldman | June 22, 2020 | Anti-Empire.Com | Asia Times | Russia Insider

Economic historians may date the start of the Asian century to May 2020, when most Asian economies bounced back to full employment while the West languished in coronavirus lockdown.

Asia has emerged as an economic zone as closely integrated as the European Union, increasingly insulated from economic shocks from the United States or Europe.

Google’s daily data on workplace mobility uses smartphone location to determine the number of people going to work – by far the most accurate and up-to-date available reading on economic activity. As of May 13, Taiwan, South Korea and Vietnam were back to normal levels. Japan and Germany had climbed back to 20% below normal. The US, France and the UK remain paralyzed. Google can’t take readings in China, but the available evidence indicates that China is on the same track as Taiwan, South Korea and Vietnam.

Asian economic recovery is consistent with success in controlling the Covid-19 pandemic. China, Japan, Taiwan, South Korea, Hong Kong and Singapore have Covid-19 death rates a tenth of Germany’s and a hundredth of the rate in the US, UK, France or Spain. [My guess is due to wider T-cell cross-immunity from prior coronaviruses.] As I reported May 21, the US is struggling to re-open its economy despite a much higher rate of new infections than the Asian countries or Germany. That entails substantial risk. Two Ford Motor plants in the US that had re-opened May 17 shut yesterday after employees tested positive for Covid-19, for example.

Asia’s short-term surge followed its success in disease prevention. [Its greater exposure to recent coronaviruses before Covid-19.] But the long-term driver of Asian growth is China’s emergence as a tech superpower. This week’s session of the People’s Congress in Beijing is expected to pass a $1.4 trillion of new government investments in 5G broadband, factory automation, self-driving cars, artificial intelligence and related fields.

Asia now acts as a cohesive economic bloc. Sixty percent of Asian countries’ trade is within Asia, the same proportion as the European Union. The Google mobility numbers confirm what we learned earlier this month from China’s April trade data. Intra-Asian trade surged year-over-year, while trade with the United States stagnated.

The surge in Chinese trade with Southeast Asia, South Korea and Taiwan shows the extent of Asian economic integration. China’s exports to Asia have grown much faster than its trade with the US, which stagnated after 2014.

China���s stock market meanwhile is this year’s top performer, down only 2% year-to-date on the MSCI Index in US dollar terms while all other major exchanges are deep in negative numbers. The strength of China’s stock market is noteworthy given the escalation of economic warfare with the US, including a US ban on third-party exports of computer chips made with US intellectual property to blacklisted Chinese companies, and the threat to de-list Chinese companies on US stock exchange.

Healthcare technology companies, though, led the Chinese stock market, with Alibaba Health Information more than doubling year to date. China’s ambition to lead the world in artificial intelligence and big data analysis in the health sector got a boost from the Covid-19 pandemic, to the consternation of US officials.

Last week the US Commerce Department imposed controls on sales of semiconductors to Chinese firms on Washington’s “entity list,” if they are produced anywhere in the world with US technology. China’s telecommunications giant Huawei, the world leader in 5G broadband, designs its own chips and contracts their fabrication to Taiwan Semiconductor Manufacturing Corporation, the world’s top chip foundry. TSMC uses American chip-making equipment and will fall under the ban. Industry analysts are waiting to see how strictly the US will enforce these rules, which have a 120-day grace period.

As I wrote on May 18, this represents a bet-the-farm gamble on the part of the Trump Administration, which has failed to dissuade most of its allies from doing business with Huawei, which Washington labels a threat to US national security. A handful of US companies and Holland’s ASML now dominate the market for semiconductor fabrication equipment that can produce state-of-the-art chips. If the US prevents foundries around the world from selling to Huawei, the Chinese firm will have no source of high-end semiconductors. Huawei reportedly has a large inventory of chips; China’s semiconductor imports doubled between late 2017 and late 2018, suggesting that China has stockpiled chips as a precaution. The US ban if fully implemented would damage the Chinese firm.

But that is the last card that Washington has to play. Semiconductor manufacturing equipment is America’s last control point among critical technologies. In US corporate boardrooms and engineers’ Internet chat rooms, the question is not whether, but when China will reverse engineer American or Dutch machines and produce its own.

China may not be able to buy high-end computer chips, but it can hire all the chip engineers it wants anywhere in the world. Taiwan now dominates chip fabrication, and a tenth of Taiwan’s chip engineers are now working at double pay on the Chinese mainland, according to media reports.

In the past, China has established its high-tech autonomy much faster than most observers expected. Its number two telecommunications equipment firm ZTE nearly shut down in April 2018 after Washington embargoed sales of the Qualcomm chips that power its smartphones. By December 2018, Huawei was producing its own Kirin chipset, with more power than the Qualcomm product. China still uses American software to design chips, and depends on Taiwanese foundries using US equipment. If China reaches self-sufficiency in chip production quickly, the last stronghold of US tech dominance will fall.

Source: Asia Times

[xiaoquebanxiaoqueban]

Analysis of the characteristics of Nokia N1 wireless signal technology

Design highlights

Nokia N1 adopts dual antenna design MIMO (double receiving and double transmitting)

the signals received and received by the two antennas at the same time are twice as much as those received and received by the previous antenna. For example, for example, two lane and single lane expressway, it is obvious that the traffic efficiency and the number of vehicles passing through the two lanes are higher. The Nokia N1 tablet computer has two antennas built into the upper and lower ends of the body. 5g wifi antenna Considering the use habits of the tablet computer, the upper and lower antennas will not be "dead grip", which can effectively reduce the possibility of consumers covering the antenna and affecting the wireless signal.

Nokia N1 adopts dual antenna design MIMO

Hardware highlights:

in addition, in hardware configuration, Nokia N1 adopts high-quality high-speed chip WiFi 2x2 802.11ac (Broadcom bcm4354)

1: in order to achieve MIMO design, high-quality high-speed WiFi 2x2 chip must be selected to truly achieve high-speed transmission.

2： IEEE WiFi protocol has 802.11 a / B / g / N / AC. the chip specification WiFi AC represents the highest transmission rate of 5g band (theoretical value 433mbps). The theoretical value of 433 * 2, which is about 867 Mbps, can be achieved if two antennas are used for double Slim Omni Antenna supplier receiving and double transmitting.

Check whether the home router is out of date

some netizens have reported that the WiFi in their home sometimes goes off and on. Imagine if you buy it at homeIf a 60 inch TV doesn't have high-definition movies, it can still only watch small screen TV programs. Nokia has a dual antenna and AC protocol, but is the bandwidth at home large enough? Does the router also have a dual antenna and support AC? 802.11 protocol single antenna multi antenna router model a B NAC Netgear wndr4300 1750m (comparison of frequency bands supported by some routers on the market)

Nokia will automatically search for the fastest connection environment from 5g / 2.4G band around users to bring the best experience to consumers. And the well-known mobile devices will also be connected with the original ones.

Some consumers on the network reflect that they can't connect to WiFi, sometimes drop the line after connecting, and the network speed is very slow. At this time, please be sure to check from your home router, including: the Internet bandwidth applied for opening is too small, the service life of router, router configuration, router heat dissipation, and whether there is strong magnetic or thermal equipment interference around the router（ Microwave oven, hair dryer, electromagneticBecause these seemingly minor problems will lead to various "discomfort" of WiFi Internet access during the use of tablet computers. In particular, it is recommended to purchase and use brand routers produced by large factories.

Experts' comments: the game between the internal design of the flat panel and the defense

the decline of receiving sensitivity affects the wireless signal transmission, such as the stability and quality of WiFi connection. It is not only affected by the shielding interference of the environment, but also by the product workmanship, material and internal design. Therefore, carefully designed products in the circuit, component selection layout, will try to minimize the interference generated by each part in operation.

Noise can also lead to the decrease of wireless receiver sensitivity

therefore, the term "decline of sensitivity (desense)" is becoming more and more important. The tablet computer is mainly composed of system platform (such as CPU, battery), connector (USB, HDMI for transmission), other function modules (such as touch screen, camera lens module) and wireless chipset (such as Wi Fi, Bluetooth, GPS). If the signals sent by these components themselves interfere with each other due to poor design, resulting in noise and can not be controlled under a certain limit, the receiving sensitivity will be reduced.

Nokia's wifi antenna is directly connected to the metal hole of the speaker

As you can imagine, if you are in a noisy room during a video conference, if you do not have sound insulation treatment, the other party can only hear a lot of noise unless you raise the volume. You can't identify the speaker's voice, and of course, you can't interpret what the other party wants to say.

In order to prevent the noise interference in the system, many factors should be considered in the design. The most obvious is to remove the plastic skin of the internal data line transmitted by the antenna, and use conductive cloth to directly connect with the shell. In the article "the world's first dismantling of Nokia N1", we can see that Nokia's wireless antenna is directly connected with the metal hole of the speaker, in order to obtain better wireless reception effect.

pad.zol.com . CN true Zhongguancun Online

report Online 3162 ] design highlights Nokia N1 adopts dual antenna design MIMO (double receiving and double transmitting). The signals received and received by two antennas at the same time are twice as much as those received and received by the previous antenna. For example, take two lanes and single lanes on highways. Obviously, the traffic efficiency and the number of vehicles passing through the two lanes are higher. The Nokia N1 tablet computer has two antennas built into the upper and lower ends of the body, taking into account