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读书笔记 | 业余无线电通信

  • 2026-02-12 04:56:55
读书笔记 | 业余无线电通信

本书是业余无线电第五版,系统介绍了开设、操作业余无线电台的相关知识和法律法规,包括业余无线电通信简史、操作实践、收发报自我训练、不同业余无线电波段的运用、业余短波天线等

感谢业余无线电家童效勇(BA1AA)和陈方(BA4RC)为我们编写的业余无线电通信入门教材

1 什么是业余无线电

业余无线电通信(以下有时简称“业余通信”)是一项鼓励人们去从事无线电收信和发信实践的业余兴趣爱好活动。业余无线电通信的英语名字是“Amateur Radio”,符合国际电信联盟ITU定义的业余无线电爱好者是“Radio Amateur”,在世界上又普遍被称为“HAM”(哈佛三人组的呼号)。由于“HAM”在英语中被解释为“火腿”,所以“火腿”又成了从事业余无线电通信的爱好者们的另一个名字。

业余无线电爱好者们执着不懈地涉猎各种未知的通信模式

第一个由中国人建立的业余无线电组织为“中国业余无线电社(China Amateur Radio Union,简称CARU)”,系“中国无线电工程学校”校长方子卫(AC8FG)基于“九·一八”事变而发起。为抵制外人擅用的AC呼号和擅划的业余分区,CARU在国际分配给中国的字头中启用了XU为业余呼号冠字,划定了全国的业余分区。

新中国成立后,随着国防体育的开展,无线电活动也逐步开展起来;八九十年代,集体业余电台在全国迅速发展;改革开放后,个人业余电台也陆续恢复开放,方便了爱好者们对无线电技术的探索、研究和各类活动的开展。

在世界范围内各国处理应急和突发事件上,业余无线电都起到了积极作用。

分区上,我国境内除港澳台地区外的业余电台分区共分为0~9,10个分区。且每一个业余电台呼号都是唯一的,只代表一个特定的电台。

业余无线电主要的通信方式有CW(电报)、FM(调频语音,最常用)、SSB(单边带,短波远距离)和数字通信

2 通信操作实践

一次成功的联络,至少应包括3件事:双方都正确地抄收了对方的呼号,交换信号报告,将这次联络情况正确地记录在电台日记上。

一般情况下,业余通信还应包括这样一些内容:介绍自己的姓名,电台所在的地理位置,交换相互通信的凭证——QSL卡片的地址或途径,交换所用设备的情况,天气情况等。

友好是全世界爱好者的信条之一,所以在每一次联络中都少不了热情的问候。说一声“73”是HAM向对方致敬的独特方式,也是业余通信与其他业务通信用语区别之一。

学习通信简语和常用短语,了解通信的基本程序,就可以进行一次完整的通信了。

基本程序主要有:呼叫前询问普遍呼叫(CQ 3遍,这里是 1遍,本台呼号 3遍,请回答 1遍)、回答程序(对方呼号 1-3遍,这里是 1遍,本台呼号 1-3遍,请回答)、QRZ询问呼叫插入呼叫联络程序(通信内容前后确认对方和本台呼号)。

3 如何运用不同的业余频段

无线电波以每秒30万千米的速度离开发射天线后,经过不同的传播路径到达接收点(各种因素的影响)。人们根据这些各具特点的传播方式,把无线电波归纳为4种主要类型:地波、天波(电离层波)、空间波、散射波。

属于VHF的2m波段(144~148MHz)是业余爱好者进行各种空间通信试验的常用波段,传播远但绕行差,主要通过差转进行远距离通信

属于UHF的70cm波段(430~440MHz)是陆上移动通信的“黄金通道”。与2m波段相比,70cm波段的天线可以更加小巧,干扰相对少一些,可使用的频带更宽,在城区里的通信效果不错。

此外,常见的业余频段还有6m波段(50~54MHz)、10m波段(28.0~29.7MHz)、15m波段(21.0~21.45MHz)、20m波段(14.0~14.35MHz)和80m波段(3.5~3.9MHz)等。

A类操作证一般常用等业余对讲机也就是手台UV机,一般都是在2m和70cm波段通联。

此外,书中还介绍了CW收发报自我训练、业余电台竞赛活动等。

相关链接:

智谱APP——考试报名、登记等

无线电HAM小程序——考试题库、附近中继、CW练习等

业余无线电工具集——考试题库、信息查询

HAM个人工具——卫星过境查询

云端卫星——卫星过境

http://www.crac.org.cn/——业余无线电分会

https://qrz.com——全球呼号数据库

以上。

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  1. CONNECT:[ UseTime:0.000432s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000564s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000219s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000259s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000507s ]
  6. SELECT * FROM `set` [ RunTime:0.000185s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000465s ]
  8. SELECT * FROM `article` WHERE `id` = 467762 LIMIT 1 [ RunTime:0.001754s ]
  9. UPDATE `article` SET `lasttime` = 1771011501 WHERE `id` = 467762 [ RunTime:0.008125s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000316s ]
  11. SELECT * FROM `article` WHERE `id` < 467762 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000638s ]
  12. SELECT * FROM `article` WHERE `id` > 467762 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.003604s ]
  13. SELECT * FROM `article` WHERE `id` < 467762 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001096s ]
  14. SELECT * FROM `article` WHERE `id` < 467762 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.006202s ]
  15. SELECT * FROM `article` WHERE `id` < 467762 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001155s ]
0.090904s