5G Antenna Solution for Tunnel Scenarios
4.1 New leaky cable
High-speed rail and subway tunnels are small and closed, with severe multipath reflection. Traditional 13/8 leaky cables do not support fre...
Entering the era of network convergence, the era of traditional telecom operators dominating the communications industry will be gone forever, and 3G operations are no exception. The Economist asked...
[color=#000][font=Helvetica, Arial, sans-serif]R87/G14 has powerful performance and rich on-chip resources. Using it as the main control of the reversing system can save a lot of extra chips, save spa...
0; clk_bit<='0'; begin process(clk_in,reset) begin if(reset='1') then clk_cnt<="0000"; clk_bit<='0'; elsif rising_edge(clk_in) then if (clk_cnt=4) then clk_cnt<="0000"; clk_bit<=not clk_bit; else clk_...
Question: I added the header file using the "scan all file dependencies" method, and the "include" of the current project already shows the "board.h" header file. However, when I "build all", it shows...
Abstract: The structure and working principle of the monolithic switching power supply chip TOPSwitch are introduced, a complete application circuit example of an ultra-wide input isolated regulated s...
Electric motors and internal combustion engines of the same power have similar torque levels. High power requires high torque, and torque determines a vehicle's acceleration speed, commonly known a...[Details]
In recent years, with the application of the IEC61850 standard and the development and deployment of optoelectronic transformers, the concept of digital substations has been put into practical use ...[Details]
As time goes by, people are increasingly concerned about their own and their families' health. However, existing monitoring devices for individual vital signs have struggled to gain market share du...[Details]
According to foreign media reports, researchers at the University of Surrey have developed an artificial intelligence system that can accurately locate the location of equipment in densely populate...[Details]
Core point: The automotive industry chain and the humanoid robot industry have collaborative advantages in hardware, software, and scenarios. Upstream and downstream companies in the automotive ind...[Details]
Pure electric vehicles, structurally speaking, have components such as a power battery. In addition to the power battery, a small battery also powers some low-voltage electrical components and even...[Details]
With the advent of the electric car era, the number of pure electric vehicles has increased significantly, but many car owners do not know how to properly maintain pure electric vehicles. In additi...[Details]
Through AI connection technology supported by Qualcomm X85 5G modem and RF and Qualcomm FastConnect 7900 mobile connection system, seamless switching can be achieved between cellular net...[Details]
1. Fault phenomenon and cause analysis
1. During the operation of the equipment, the expansion sleeve is subjected to a large torque, and the mating surfaces of the shaft and the sleeve move...[Details]
The MCX E series is the most reliability- and safety-focused series in NXP's extensive MCX product portfolio.
With the launch of this series, NXP has further enriched its 5V-compatible MCU pr...[Details]
The difference between a series inverter and a parallel inverter is that they use different oscillation circuits. A series inverter connects L, R, and C in series, while a parallel inverter connect...[Details]
In the field of communications power supplies, AC/DC rectifier power supplies are called primary power supplies or basic power supplies, while DC/DC converters are called secondary power supplies. ...[Details]
In the period after the switching power supply achieved the "20 kHz" revolution in the 1970s, although improvements and enhancements were made in circuit technology, the development level of the se...[Details]
With the advancement of science and technology and the promotion of green, energy-saving, and circular development, the demand for precise control and accurate measurement is increasing. In the pow...[Details]
HTTP is the abbreviation of Hypertext Transfer Protocol. It is an application protocol based on TCP/IP communication protocol used to transmit HTML and image files. It is an application-level objec...[Details]
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