開啟主選單

求真百科

變更

衰减器

大小無變化, 2 年前
無編輯摘要
衰减器的工作频带是指在给定频率范围内使用衰减器,衰减器才能达到指标值。由于射频/微波结构与频率有关,不同频段的元器件,结构不同,也不能通用。现代同轴结构的衰减器使用的工作频带相当宽,设计或使用中要加以注意。
{| class="https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E8%A1%B0%E5%87%8F%E5%99%A8&step_word=&hs=0&pn=459&spn=0&di=7108135681917976577&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=2760728320%2C276690976&os=3533488001%2C1134206476&simid=3421761451%2C438441576&adpicid=0&lpn=0&ln=1712&fr=&fmq=1656235237067_R&fm=&ic=undefined&s=undefined&hd=undefined&latest=undefined&copyright=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2Ffile5.hi1718.com%2Fproduct%2F17%2F04%2F05%2F162057007.jpg%26refer%3Dhttp%3A%2F%2Ffile5.hi1718.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Dauto%3Fsec%3D1658827783%26t%3D02004580f781a69009cf9dc323edf14f&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3Bit808b_z%26e3Bv54AzdH3Fr6517vpAzdH3Fda8098a89n9c0l9_z%26e3Bip4s&gsm=1cc&rpstart=0&rpnum=0&islist=&querylist=&nojc=undefined" style="float:right; margin: -10px 0px 10px 20px; text-align:left"|<center>'''数据衰减器'''<br><imgsrc="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Ffile5.hi1718.com%2Fproduct%2F17%2F04%2F05%2F162057007.jpg&refer=http%3A%2F%2Ffile5.hi1718.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1658827783&t=02004580f781a69009cf9dc323edf14f" width="280"></center><small> 圖片來自百度</small> |}
'''衰减量'''
当输入功率从10mW变化到额定功率时,衰减量的变化系数表示为dB/(dB*W)。衰减量的变化值的具体算法是将系数乘以总衰减量功率(W)。如:一个功率容量50W,标称衰减量为40dB的衰减器的功率系数为0.001dB/(dB*W),意味着输入功率从10mW加到50W时,其衰减量会变化0.001*40*50=2dB之多!
{| class="https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E8%A1%B0%E5%87%8F%E5%99%A8&step_word=&hs=0&pn=459&spn=0&di=7108135681917976577&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=2760728320%2C276690976&os=3533488001%2C1134206476&simid=3421761451%2C438441576&adpicid=0&lpn=0&ln=1712&fr=&fmq=1656235237067_R&fm=&ic=undefined&s=undefined&hd=undefined&latest=undefined&copyright=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2Ffile5.hi1718.com%2Fproduct%2F17%2F04%2F05%2F162057007.jpg%26refer%3Dhttp%3A%2F%2Ffile5.hi1718.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Dauto%3Fsec%3D1658827783%26t%3D02004580f781a69009cf9dc323edf14f&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3Bit808b_z%26e3Bv54AzdH3Fr6517vpAzdH3Fda8098a89n9c0l9_z%26e3Bip4s&gsm=1cc&rpstart=0&rpnum=0&islist=&querylist=&nojc=undefined" style="float:right; margin: -10px 0px 10px 20px; text-align:left"|<center>'''数据衰减器'''<br><imgsrc="https://gimg2.baidu.com/image_search/src=http%3A%2F%2Ffile5.hi1718.com%2Fproduct%2F17%2F04%2F05%2F162057007.jpg&refer=http%3A%2F%2Ffile5.hi1718.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1658827783&t=02004580f781a69009cf9dc323edf14f" width="280"></center><small> 圖片來自百度</small> |}
==相关参数==
1)衰减: 用于描述传输过程中从一端到另一端的信号减少的量值。可用倍数或分贝数来表达。
13,329
次編輯