NB-IoT天线同轴电缆RG316、RG174、RG178

待我称王封你为后i 2022-05-24 10:48 176阅读 0赞

NB-IoT的天线电缆可以接多长？常用的线缆有RG316、RG174、RG178，不同的线缆其衰减程度如何？

mingdu.zheng **at** gmail *dot* com  
[https://blog.csdn.net/zoomdy/article/details/80453953][https_blog.csdn.net_zoomdy_article_details_80453953]

|型号|阻抗（ohms）|内芯（mm）|内绝缘|外绝缘|外径（mm）|衰减（dB）|内芯导体|屏蔽层导体|  
|—|---|—|---|—|---|  
|[RG316][]|50|7*0.15|PTFE|FEP|2.6|27.3(900MHz，30m)|镀银镀铜钢|镀银铜编带|  
|[RG174][]|50|0.5|PE|PVC|2.55|31.0(900MHz，30m)|铜|铝箔和镀锡铜编带|  
|[RG178][]|50|7*0.1|PTFE|PVC|1.8|42.7(750MHz，30m)|镀银镀铜钢|镀锡铜编带|  
|[RG mini][]|50|0.2|PTFE|FEP|1.17|220（1GHz，100m）|镀银镀铜钢|镀银铜编带|

*  以e络盟上的产品为依据
 *  衰减仅作参考，不同厂家衰减值不同
 *  衰减与频率有关，频率越高，衰减越厉害
 *  衰减与线粗细有关，线越细，衰减越厉害
 *  查不到RG1.13，也有叫RF1.13的，指外径1.13mm？RGmini？
 *  聚四氟乙烯（Poly tetra fluoroethylene，简写为[PTFE][]）
 *  聚乙烯（polyethylene ，简称[PE][]）
 *  [FEP][]全称为Fluorinated ethylene propylene，翻译为氟化乙烯丙烯共聚物（全氟乙烯丙烯共聚物）
 *  聚氯乙烯，英文简称[PVC][]（Polyvinyl chloride)
 *  有关同轴电缆的更多信息：[https://en.wikipedia.org/wiki/Coaxial\_cable][https_en.wikipedia.org_wiki_Coaxial_cable]

[https_blog.csdn.net_zoomdy_article_details_80453953]: https://blog.csdn.net/zoomdy/article/details/80453953
[RG316]: http://cn.element14.com/belden/84316-001100/cable-coaxial-rg-316-u-26awg-50/dp/1221549
[RG174]: http://cn.element14.com/belden/7805-010100/coax-cable-25awg-50-ohm-30-5m/dp/2764878
[RG178]: http://cn.element14.com/belden/mrg1781-00100/cable-coax-rg178pe-black-100m/dp/1423299
[RG mini]: http://cn.element14.com/pro-power/pp000843/coaxial-cable-vmtx-mini-25m/dp/2356789
[PTFE]: https://baike.baidu.com/item/%E8%81%9A%E5%9B%9B%E6%B0%9F%E4%B9%99%E7%83%AF
[PE]: https://baike.baidu.com/item/%E8%81%9A%E4%B9%99%E7%83%AF/274575
[FEP]: https://baike.baidu.com/item/FEP/5214772
[PVC]: https://baike.baidu.com/item/%E8%81%9A%E6%B0%AF%E4%B9%99%E7%83%AF/1688898
[https_en.wikipedia.org_wiki_Coaxial_cable]: https://en.wikipedia.org/wiki/Coaxial_cable