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  • 更新日期: 2021-12-28
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1. Overview of base station antenna This chapter introduces the classification of base station antennas and the appearance of different types of antennas in ……
  • 更新日期: 2021-12-28
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Learn antenna is a dry cargo antenna technology column focusing on antenna simulation and debugging, supplemented by theoretical principles, including introduction to antenna, principle introduction of various antennas, simulation software modeling, desig
  • 更新日期: 2021-12-28
  • 浏览次数: 5393
The traditional car is an isolated individual. As the name suggests, Internet of vehicle (IOV) is to let the car connect to the Internet. This is a subdivided application of the Internet of things (IOT: Internet of things) in the automotive
  • 更新日期: 2021-12-28
  • 浏览次数: 2478
Since five years ago, the network has gradually transitioned from 4G network to 5g network. One of the most obvious changes is the increase of network frequency. In the 4G era, we mainly use frequencies of 2.6GHz and below. In the 5g era, the frequency ba
  • 更新日期: 2021-12-28
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The filter is the core RF device of the base station. The filter filters the electromagnetic wave signal and only allows the required signal to pass through. The main purpose is to solve the interference problem between different frequency bands and diffe
  • 更新日期: 2021-12-28
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1 Introduction Because of its wide area coverage and high reliability, satellite communication system is playing a more ……
  • 更新日期: 2021-12-28
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1.Summary In recent years, mobile communication has been rapidly developed and popularized in China, and the transmitter and receiver technology of wireless ……
  • 更新日期: 2021-12-28
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In the high frequency domain, the signal or electromagnetic wave must propagate along the transmission path with uniform characteristic impedance. In case of impedance mismatch or discontinuity, part of the signal is reflected back to the transmitting end
  • 更新日期: 2021-12-28
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The three-dimensional heterogeneous integration technology of micro system is the most promising technology to realize the requirements of higher integration, higher performance and higher working frequency of RF electronic system in the future. This pape
  • 更新日期: 2021-12-28
  • 浏览次数: 3428
The filter is the core RF device of the base station. The filter filters the electromagnetic wave signal and only allows the required signal to pass through. The main purpose is to solve the interference problem between different frequency bands and diffe
  • 更新日期: 2021-12-28
  • 浏览次数: 7881
一、Basic concepts of impedance measurement Impedance definition: Impedance is the total reaction of components or circuits to perio……
  • 更新日期: 2021-12-28
  • 浏览次数: 7127
With the service of China's heavy stealth fighter j-20 and the formation of initial combat effectiveness, as well as the aircraft's increasingly high-profile participation in joint exercises and practical military training at sea, its high-definit
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