1 kW国标全频段地面数字电视发射机原理探析

Principle of 1kW National Standard Full Band Terrestrial Digital TV Transmitter

随着全球广播电视的不断发展,数字化成为其重要的发展方向。因此,详细介绍了1 kW国标地面数字电视发射机在UHF全频段的实现方法。从兼顾整机性能指标最优和方便实现的角度出发,重点介绍了射频系统中关键部分功率放大模块、无源部分分配与合成实现方式以及整机避免雷击的5个保护措施等,以期在数字电视发射领域中发挥重要作用。

With the continuous development of global broadcasting and television,digitization is its goal and direction.Therefore,This paper introduces the implementation method of 1kW national standard terrestrial digital TV transmitter in UHF full frequency band in detail.From the point of view of considering the optimal performance index of the whole machine and convenient realization,The key parts of the RF system power amplifier module,passive part distribution and synthesis realization method,and the five protection measures of the whole machine to avoid lightning stroke are introduced emphatically.The realization of the whole frequency band introduced in this paper is expected to play an important role in the field of digital TV transmission.