Kinghelm Electronics (www.kinghelm.net) has been deeply involved in RF and microwave technology, continuously developing and producing new antenna connectors to enhance product performance and expand market share. At the same time, the company is striving to improve the professional skills and knowledge of its employees to provide high-quality products and technical services to customers. Recently, they invited Mr. Zhang Wujun, a communication electronics and information technology expert from Shenzhen, to the company headquarters to conduct RF and microwave technology training for the sales team, aiming to enhance the team's professional knowledge base. As the technical consultant for Kinghelm Electronics, Mr. Zhang Wujun possesses profound professional knowledge and practical experience in the field of communication electronics, having participated in and led the design and development of numerous major communication projects. According to Mr. Sang Shiqiang, Kinghelm Electronics and SlkorMicro Semicon (www.slkoric.com) have established a strong team of technical consultants, all of whom are professors and experts from Tsinghua University, Peking University, University of Electronic Science and Technology of China, and Northwestern Polytechnical University, with deep theoretical foundations and extensive practical experience. They have effectively combined and translated their expertise with Kinghelm Electronics' robust knowledge engineering system.

Mr Zhang Wujun, During Training

Mr. Zhang , originally from Liling, Hunan, is an expert in "communication electronics and information technology." He currently serves as the General Manager of Shenzhen Keyu Tai Co., Ltd. He holds a master's degree and graduated from both the University of Electronic Science and Technology of China and Northwestern Polytechnical University. Mr. Zhang has worked at various institutions, including the 20th Research Institute of the Ministry of Electronics Industry (Xi'an Navigation Technology Research Institute), CNAC, SEG Group, and a military-industrial unit and KETONG Electronics. He has been involved in or led numerous significant projects, including the research and development, equipment installation, and naval training for navigation equipment in the Antarctic expedition fleet, software design for distributed control systems of air-to-air missiles, wireless system design for the first phase of the Shenzhen Metro project, and internal monitoring and television subsystems for large surface ships.

Zhang Wujun (second from right) and Wang Tao, Tsinghua University and other advisors

Mr. Zhang's work achievements have been honored with the Second Prize for Scientific Research Achievements by the Ministry of Electronics Industry. He has also served for many years as the Chief Technical Advisor for the magazine "International Intelligent Building" and has received numerous awards for outstanding papers from the Shenzhen Electronics Society. Currently, he is one of the professor-level technical advisors at Kinghelm Electronics, where his professional knowledge has been effectively integrated into the company's robust knowledge engineering system. Kinghelm Electronics (www.kinghelm.net) is a national high-tech enterprise and a member of the "GNSS & LBS Association of China", "China Information Industry Trade Association." For over a decade, Kinghelm has been engaged in the design, manufacturing, sales, and technical service of wireless signal transceivers, electronic signal connectors, and interconnection system products. Its technical team consists of graduates from Tsinghua University and the University of Electronic Science and Technology of China, attracting outstanding overseas returnees and focusing deeply on the field of microwave RF technology. It has also established a professional research institution in collaboration with universities. Kinghelm has obtained multiple invention patents and has achieved ISO9001 certification as well as RoHS and REACH certification.

RF Circuit Diagram of Training Courseware

During the training, Mr. Zhang first introduced the classification and basic principles of filters. He pointed out that filters can be categorized into low-pass filters, high-pass filters, bandpass filters, and notch filters based on their frequency responses. The working principle of these filters mainly relies on combinations of components such as inductors, capacitors, and resistors to achieve signal selection and filtering. Mr. Zhang went on to explain in detail the characteristics and application scenarios of different types of filters. He emphasized that low-pass filters are primarily used to suppress high-frequency noise, while high-pass filters are employed to suppress low-frequency noise. Bandpass filters allow signals within a specific frequency range to pass through, whereas notch filters are capable of suppressing signals at specific frequencies.

Filter Symbols for Training Courseware

After explaining the basic principles and classification of filters, Mr. Zhang also shared some practical application cases. He mentioned that filters have extensive applications in fields such as mobile communication, satellite communication, and cable television. For example, in mobile communication, filters can be used to filter and select signals in different frequency bands, thereby improving communication quality and stability.

"Kinghelm connects Beidou," started by launching antenna products, including Beidou GPS dual-mode antennas, Bluetooth, WiFi, Zigbee, NB-IoT, LORA, UWB, and Beidou [敏感词] antenna series, as well as supporting RF adapter cables. Now, the product range has expanded to various connectors for boards and wires, board sockets, plugs, and signal switches, as well as automotive and motorcycle wire harnesses, specialty wires for industrial, medical, and scientific research uses, and custom-made non-standard products, forming three main product lines. Kinghelm's brother company, SlkorMicro Semicon (www.slkormicro.com), sells semiconductor products around the world, serving over 10,000 customers, with its products consisting of diodes and transistors, power devices, and power management chips. In recent years, Slkor has also launched new products such as Hall sensors, ADCs, and BMS, collaborating with Kinghelm Electronics to provide supporting services for electronic products companies.

Kinghelm SWA Device Series

The company attaches great importance to training, which is also a necessary path for enterprise development. Only by continuously improving employees' professional knowledge and skills can we better serve customers and meet market demand. In the future, Kinghelm Electronics (www.kinghelm.net) will continue to carry out more professional training to enhance employees' professional skills and knowledge level, promoting the company's sustained development.