短波通信长期以来一直是远距离通信的主要手段之一,在无线电通信的各频段中一直处于领先地位,曾对人类通信事业做出过重要贡献。但随着卫星通信出现以后,某些重要的短波通信业务被卫星通信所代替,因此曾一度使人们对短波通信的继续存在和发展产生过怀疑,似乎短波通信可完全由卫星通信所取代。但实践表明卫星通信虽然具有通信容量大、可靠性高、通话质量好等优点,但与短波通信相比技术复杂、成本也高的多,尤其是战时易于被摧毁,修复困难,应用于现代战争中有很大的局限性。而短波通信既可用于近距离通信,又可用于远距离通信;既可用于点对点或点对面的固定通信,又可用于移动通信。用于远距 Shortwave communications has long been one of the major means of telecommunications over long distances and has been at the forefront of all bands in radiocommunication and has made an important contribution to the cause of human communication. However, with the advent of satellite communications, some of the major shortwave communications services were replaced by satellite communications. As a result, once people were suspicious of the continuing existence and development of HF communications, it appeared that HF ​​communications could be completely replaced by satellite communications. However, practice shows that although satellite communications have the advantages of large capacity of communication, high reliability and good call quality, the technology is more complicated and costly than shortwave communications, especially when wartime, it is easy to be destroyed and repaired, There are great limitations in the war. The shortwave communication can be used not only for short-range communication but also for long-distance communication; it can be used for both fixed communication and peer-to-peer fixed communication as well as mobile communication. For long distance