关于rfid的天线问题
时间:10-02
整理:3721RD
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Hi各位好, 我是rfid的新人
若读写器是用圆极化天线, 标签也必须是吗?
读写器和卷标的天线要是同一类型吗?
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求助各位高手!
Hi各位好, 我是rfid的新人
若读写器是用圆极化天线, 标签也必须是吗?
读写器和卷标的天线要是同一类型吗?
若是不一样有问题吗? Normal 0 0 2 false false false EN-US ZH-TW X-NONE MicrosoftInternetExplorer4 <!-- /* Font Definitions */ @font-face {font-family:SimSun; panose-1:2 1 6 0 3 1 1 1 1 1; mso-font-alt:宋体; mso-font-charset:134; mso-generic-font-family:auto; mso-font-pitch:variable; mso-font-signature:3 135135232 16 0 262145 0;}@font-face {font-family:新細明體; panose-1:2 2 3 0 0 0 0 0 0 0; mso-font-alt:PMingLiU; mso-font-charset:136; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:3 135135232 22 0 1048577 0;}@font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:1; mso-generic-font-family:roman; mso-font-format:other; mso-font-pitch:variable; mso-font-signature:0 0 0 0 0 0;}@font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:-1610611985 1073750139 0 0 159 0;}@font-face {font-family:"\@SimSun"; panose-1:2 1 6 0 3 1 1 1 1 1; mso-font-charset:134; mso-generic-font-family:auto; mso-font-pitch:variable; mso-font-signature:3 135135232 16 0 262145 0;}@font-face {font-family:"\@新細明體"; panose-1:2 2 3 0 0 0 0 0 0 0; mso-font-charset:136; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:3 135135232 22 0 1048577 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:none; font-size:12.0pt; mso-bidi-font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:新細明體; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-font-kerning:1.0pt;}.MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} /* Page Definitions */ @page {mso-page-border-surround-header:no; mso-page-border-surround-footer:no;}@page Section1 {size:595.3pt 841.9pt; margin:72.0pt 90.0pt 72.0pt 90.0pt; mso-header-margin:42.55pt; mso-footer-margin:49.6pt; mso-paper-source:0; layout-grid:18.0pt;}div.Section1 {page:Section1;}--> /* Style Definitions */ table.MsoNormalTable {mso-style-name:表格內文; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; mso-bidi-font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-font-kerning:1.0pt;}
求助各位高手!
不一定,园极化一半的能量可以耦合到线极化,当然极化相同更好
我问的是uhf的rfid, 这个波段是radiative coupling吧?
这个波段里园极化天线的reader和线极化天线的tag, 能量流失也是一半吗?
流失一半能量是怎么算出来的啊? 可以告诉我吗?
请个位帮忙!
怎么是乱码啊
不明白为什么uhf就和rf有什么不同了
损耗一般是理论值,一般圆极化天线没那么好的圆极化性能