2025-04-08Characteristics of low-noise amplifiers

Low - noise amplifiers (LNAs) are critical components in many electronic systems, especially in applications where weak signals need to be amplified with minimal added noise...

2025-04-07The purpose of coaxial switch

Coaxial switches are widely used in various fields due to their unique characteristics. Here are some of their main applications...

2025-04-07Characteristics of coaxial switch

Coaxial switches possess several notable characteristics that make them essential in various electronic applications...

2025-04-03Characteristics of pin diode switch

PIN diode switches possess several remarkable characteristics that make them widely used in various electronic applications...

2025-04-03How does a pin diode switch work

The PIN diode switch is a crucial component in many electronic systems, especially in RF and microwave applications. Its working principle is based on the unique characteristics of the PIN diode under different biasing conditions...

2022-11-19Optical Module Automated Testing System

Currently, domestic enterprises mainly use advanced testing equipment from home and abroad during the parameter testing process of optical communication products. Most of these testing instruments operate independently. Manual adjustment of knobs and buttons on the instrument control panels and visual inspection of waveforms or data on the instruments are common practices. This not only makes the testing process complex and error - prone but also leads to extremely low testing efficiency. Therefore, improving efficiency, reducing costs, and automating the optical communication module testing process have become crucial for enhancing the market competitiveness of optoelectronic enterprises. It is understood that other optical module manufacturers use virtual instrument technology to achieve the automated testing of various performance parameters of optical modules. This approach requires a large number of expensive instruments, which are connected to a PC via VISA - compliant interfaces. A common example is the use of testing equipment from Agilent, such as its digital...

2022-11-19Technical Application of Radar Cross - Section Testing Chamber

With the widespread application of electromagnetic stealth technology in military equipment (especially aircraft), the research on the importance of the electromagnetic scattering characteristics of radar targets has become increasingly prominent. There is an urgent need for a means to detect the electromagnetic scattering characteristics of targets, which can be used for the quantitative and qualitative analysis of the electromagnetic stealth performance and stealth effects of targets. The measurement of Radar Cross - Section (RCS) is an important method for studying the electromagnetic scattering characteristics of targets. As an advanced technology in the field of spaceflight tracking and control, the measurement of radar target characteristics is widely used in the design process of new - type radars. By measuring the RCS at important attitude angle positions, the shape and size of the target can be determined. High - precision measurement radars generally obtain target information by measuring the motion characteristics, radar reflection characteristics, and Doppler characteristics of the target. Its...

2022-11-19Solutions to the Interference of 5G Base Stations on Satellite Communication

5G Anti - interference Satellite Communication Filter 1.Background Introduction With the announcement of 5G frequency bands in China: China Telecom obtained 100 MHz of 5G test frequency resources in the 3400 - 3500 MHz band; China Mobile obtained 5G test frequency resources in the 2515 - 2675 MHz and 4800 - 4900 MHz bands. Among them, the 2515 - 2575 MHz, 2635 - 2675 MHz, and 4800 - 4900 MHz bands are new bands, while the 2575 - 2635 MHz band is China Mobile's existing TD - LTE (4G) band; China Unicom obtained 100 MHz of 5G test frequency resources in the 3500 - 3600 MHz band. Since 2019, China and other countries...

2022-11-19The Arrival of the 5G Era: More Than Just "Speed"

The evolution of communication technology has been extremely rapid. From 1G in the 1980s to 4G, which became popular around 2010, and now to the booming 5G, five generations of changes have occurred in just three to four decades. We have witnessed many milestones. The transformation and innovation in the mobile industry often drive disruptive innovations in social life. The three major features of 5G networks are extremely high speed, huge capacity, and extremely low latency. Many people have surely looked forward to the arrival of the 5G era, envisioning its dream - like massive changes. Quietly, communication technology has gone through several generations of development. 1G marked the beginning of personal mobile communication in the 1980s, using analog signals. The legendary "big brick" mobile phones emerged during this period. However, they could only be used for general voice transmission, with unstable signals and incomplete coverage. In the 1990s, 2G enabled...