Mobile phone crystal 3.2*2.5mm 3225 26M (26.000MHZ)
Single chip microcomputer STM32L151CCU6
Probe domestic high frequency needle JKT-50L high frequency needle with 3 probes
As home routers evolve, they are becoming more powerful and capable of handling multiple frequency bands. Currently, over half of existing Wi-Fi routers support dual-band operation. In the future, we may see three-band, four-band, or even five-band routers, offering better performance and reduced interference. In 2007 and 2009, it became clear that the 2.4 GHz band had limited bandwidth—less than 100 MHz—which made it difficult to increase data rates significantly. This led to the development of the IEEE 802.11ac standard, introduced around 2012. It primarily used the 5 GHz band, which provided more available spectrum and allowed for higher speeds. The 5 GHz band offers hundreds of MHz of spectrum resources, making it ideal for high-speed data transmission. Additionally, regulatory bodies like the US FCC have been opening up new portions of the 5 GHz spectrum, encouraging other countries to follow suit. As a result, the global availability of 5 GHz has improved, and the Wi-Fi Alliance began focusing on this band from 2012 onward. By 2015, over half of new Wi-Fi products supported 5 GHz, marking the rise of dual-band devices. In 2013, the Wi-Fi Alliance also took over the WiGig Alliance, which was working on the IEEE 802.11ad standard operating at 60 GHz. This new band is also a global ISM band, but due to its high frequency, it has limited range and can't penetrate walls easily. However, it excels in short-range, high-speed data transfer, such as streaming HD video. With the addition of 60 GHz, Wi-Fi officially became a tri-band technology. Another important development came with the IEEE 802.11ah standard, which operates at 915 MHz (sub-1 GHz). This standard, known as Wi-Fi HaLow, is designed for low-power, long-range IoT applications. It was officially named in January 2016 and offers low-rate, high-coverage communication. Although it's still in early stages, it shows Wi-Fi’s potential to expand into new markets. Adding 915 MHz makes Wi-Fi a quad-band system, but this frequency isn’t globally standardized. Different countries use it differently, and the available bandwidth varies. Despite this, the trend continues: Wi-Fi keeps expanding into new spectrum bands. However, there are challenges. LTE networks are increasingly using the 5 GHz band, leading to potential interference between Wi-Fi and LTE. In 2015, this caused tension between the two camps, with debates over fairness and coexistence mechanisms. While LTE proposed solutions, Wi-Fi advocates felt their rights were being compromised. Under the leadership of the US FCC, Wi-Fi found another opportunity with the 3.5 GHz band. Part of this band is now allocated for unlicensed use, giving Wi-Fi a chance to grow alongside LTE, which uses the licensed portion. In summary, Wi-Fi has expanded to include 915 MHz, 2.4 GHz, 3.5 GHz, 5 GHz, and 60 GHz. Future standards like 802.11ax (for 2.4 GHz and 5 GHz) and 802.11ay (for 60 GHz) will continue to push performance forward. The 915 MHz band is still developing, and 3.5 GHz may be included in future updates. The Wi-Fi Alliance has been slow in certifying new technologies. For example, WiGig certification was delayed until 2016, and Wi-Fi HaLow was expected to launch in 2018. New standards typically take about four to five years to roll out. The 802.11ax draft, for instance, was expected in 2016 but might be pushed to 2017. Beyond just expanding frequency bands, Wi-Fi is also looking for new applications. High-definition video streaming, IoT, and indoor positioning are all areas of interest. In 2015, the Wi-Fi Alliance introduced Wi-Fi Aware, a feature similar to Bluetooth, enabling location-based services and device discovery. Looking ahead, home routers will become more advanced, supporting multiple frequency bands. These devices will handle everything from mobile internet access to video streaming and IoT connectivity. However, multi-band support may come at a cost—newer models like Google’s OnHub, launched in 2015, already cost $200, far above the typical $50-$100 range. Multi-band capabilities could become a key selling point, but they might also lead to higher prices.
Tablet PC
Tablet pc have many distinctive features. The first is portability. They are thin, light, and easy to carry. They can be easily put into a backpack or handbag. The screen display is excellent, usually with high-definition resolution and bright colors, providing a clear and realistic visual experience. The operation is simple and intuitive. You can complete various operations by touching the screen, which is sensitive and convenient. The performance is constantly improving, which can meet the needs of multitasking and running various applications. The battery life is relatively good, and it can be used for several hours on a single charge, which meets daily use. And it has a variety of interfaces, such as USB and headphone jacks, which are convenient for connecting external devices. In addition, the appearance design of tablets is fashionable and beautiful, and there are many styles and colors to choose from.
Android Tablet PC: stylish appearance and powerful functions. It is thin and portable, with smooth lines, easy to carry at any time. Made of high-quality materials, it is sturdy and durable. Excellent performance, powerful processor with sufficient memory, multi-tasking is easy. The high-definition display has vivid colors and the touch is accurate and sensitive. A rich Android application resource is a major advantage. Office software improves work efficiency, learning applications help knowledge acquisition, and entertainment applications make leisure time more exciting. It can read, watch movies, and play games to meet various needs.
Rugged Tablet PC are designed to cope with a variety of harsh environments and have a wide range of application scenarios. In the industrial field, it is a powerful assistant for engineers and technicians. Whether in a noisy workshop or outdoors in extreme temperatures, it can operate stably to perform equipment testing, data collection and other tasks. In logistics transportation, couriers can rely on their durability and portability to efficiently scan cargo barcodes and update logistics information in real time. When the public security enforces the law, the reinforced tablet can quickly query and enter information, without fear of bumps and bad weather, to ensure the smooth progress of law enforcement. In the military field, it adapts to complex terrain and harsh conditions, and provides strong support for combat command and information processing. In short, with its ruggedness and high performance, the reinforced tablet plays an important role in many special scenarios.
L-type Tablet: innovative design, expanding diverse applications.
The L-type tablet brings a new user experience with its unique shape, and its application scenarios are rich and diverse.
In the medical field, when doctors perform surgery, the L-type tablet can be fixed in a specific position, which is convenient for viewing medical records and surgical materials without holding it, improving surgical efficiency and safety. In educational scenarios, students can stand it on the desktop, watch teaching videos, and take notes at the same time to achieve efficient learning. For designers, the unique angle of the L-type tablet can better display design drawings and effects, and facilitate communication and modification with the team. In the retail industry, the L-type tablet can be used as a display terminal to attract customers with a unique form, and display product information and promotional activities. In short, the L-type tablet has unique value in many fields with its innovative design.
Smart Tablet PC: a smart choice, integrated into multiple scenarios. Smart tablets are widely used in many fields due to their powerful functions and convenience. In the field of education, they have become an important tool for online teaching. Students can access rich learning resources through smart tablets, interact with teachers and classmates, breaking the limitations of time and space. In the office, smart tablets are convenient for remote meetings, document annotations and presentations, and improve team collaboration efficiency. When entertaining at home, smart tablets allow you to enjoy high-definition movies and play exciting games, bringing you a pleasant leisure time. In terms of commercial display, it can vividly display product information and service content to attract customer attention. In short, smart tablets have shown excellent value in learning, work and entertainment scenarios.
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