• Bazz
    了解作者
  • matlab
    开发工具
  • 259KB
    文件大小
  • rar
    文件格式
  • 0
    收藏次数
  • 1 积分
    下载积分
  • 1
    下载次数
  • 2018-03-02 02:09
    上传日期
Filter design using even and odd mode analysis.
Fil_design.rar
  • Fil_design
  • Theoritical_Response.m
    831B
  • feng2010.pdf
    310.9KB
内容介绍
<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8"> <meta name="generator" content="pdf2htmlEX"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <link rel="stylesheet" href="https://static.pudn.com/base/css/base.min.css"> <link rel="stylesheet" href="https://static.pudn.com/base/css/fancy.min.css"> <link rel="stylesheet" href="https://static.pudn.com/prod/directory_preview_static/626fbbbb40256a40ceaf8fa6/raw.css"> <script src="https://static.pudn.com/base/js/compatibility.min.js"></script> <script src="https://static.pudn.com/base/js/pdf2htmlEX.min.js"></script> <script> try{ pdf2htmlEX.defaultViewer = new pdf2htmlEX.Viewer({}); }catch(e){} </script> <title></title> </head> <body> <div id="sidebar" style="display: none"> <div id="outline"> </div> </div> <div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/626fbbbb40256a40ceaf8fa6/bg1.jpg"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">548<span class="_ _0"> </span>IEEE<span class="_ _1"> </span>MICR<span class="_ _2"></span>OW<span class="_ _3"></span>A<span class="_ _3"></span>VE<span class="_ _1"> </span>AND<span class="_ _4"> </span>WIRELESS<span class="_ _1"> </span>COMPONENTS<span class="_ _1"> </span>LETTERS,<span class="_ _1"> </span>VOL.<span class="_ _1"> </span>20,<span class="_ _1"> </span>NO.<span class="_ _1"> </span>10,<span class="_ _1"> </span>OCTOBER<span class="_ _1"> </span>2010</div><div class="t m0 x1 h3 y2 ff1 fs1 fc0 sc0 ls1 ws0">No<span class="_ _2"></span>v<span class="_ _2"></span>el<span class="_ _5"> </span>Ultra-W<span class="_ _3"></span>ideband<span class="_ _5"> </span>Bandpass<span class="_ _6"> </span>Filter<span class="_ _5"> </span>Using<span class="_ _5"> </span>Shorted</div><div class="t m0 x2 h3 y3 ff1 fs1 fc0 sc0 ls1 ws0">Coupled<span class="_ _7"> </span>Lines<span class="_ _7"> </span>and<span class="_ _7"> </span>T<span class="_ _3"></span>ransversal<span class="_ _6"> </span>T<span class="_ _8"></span>ransmission<span class="_ _7"> </span>Line</div><div class="t m0 x3 h4 y4 ff1 fs2 fc0 sc0 ls1 ws0">W<span class="_ _3"></span>enjie<span class="_ _9"> </span>Feng<span class="_ _a"> </span>and<span class="_ _5"> </span>W<span class="_ _3"></span>enquan<span class="_ _9"> </span>Che<span class="ff2">,<span class="_ _9"> </span>Member<span class="_ _b"></span>,<span class="_ _9"> </span>IEEE</span></div><div class="t m0 x4 h5 y5 ff3 fs3 fc0 sc0 ls1 ws0">Abstract&#8212;<span class="ff4">A<span class="_ _c"> </span>novel<span class="_ _4"> </span>ultra-wideband<span class="_ _c"> </span>(UWB)<span class="_ _c"> </span>bandpass<span class="_ _d"> </span>&#64257;lter<span class="_ _c"> </span>using</span></div><div class="t m0 x1 h6 y6 ff4 fs3 fc0 sc0 ls1 ws0">two<span class="_ _4"> </span>shorted<span class="_ _4"> </span>coupled<span class="_ _4"> </span>lines<span class="_ _c"> </span>and<span class="_ _4"> </span>a<span class="_ _4"> </span>270</div><div class="t m0 x5 h6 y7 ff4 fs3 fc0 sc0 ls1 ws0">transversal<span class="_ _4"> </span>transmission<span class="_ _4"> </span>line</div><div class="t m0 x1 h6 y8 ff4 fs3 fc0 sc0 ls1 ws0">is<span class="_ _9"> </span>pr<span class="_ _2"></span>oposed.<span class="_ _d"> </span>The<span class="_ _9"> </span>two<span class="_ _e"> </span>shorted<span class="_ _e"> </span>coupled<span class="_ _e"> </span>lines<span class="_ _e"> </span>are<span class="_ _e"> </span>utilized<span class="_ _e"> </span>to<span class="_ _e"> </span>realize</div><div class="t m0 x1 h6 y9 ff4 fs3 fc0 sc0 ls1 ws0">180</div><div class="t m0 x6 h6 ya ff4 fs3 fc0 sc0 ls1 ws0">phase<span class="_ _c"> </span>inv<span class="_ _2"></span>ersion,<span class="_ _c"> </span>while<span class="_ _d"> </span>a<span class="_ _c"> </span>folded<span class="_ _c"> </span>transversal<span class="_ _c"> </span>transmission<span class="_ _d"> </span>line</div><div class="t m0 x1 h6 yb ff4 fs3 fc0 sc0 ls1 ws0">of<span class="_ _9"> </span>270</div><div class="t m0 x7 h6 yc ff4 fs3 fc0 sc0 ls1 ws0">is<span class="_ _9"> </span>introduced<span class="_ _e"> </span>to<span class="_ _9"> </span>perform<span class="_ _e"> </span>as<span class="_ _9"> </span>another<span class="_ _9"> </span>power<span class="_ _9"> </span>transmission</div><div class="t m0 x1 h6 yd ff4 fs3 fc0 sc0 ls1 ws0">path.<span class="_ _1"> </span>Good<span class="_ _1"> </span>impedance<span class="_ _4"> </span>matching,<span class="_ _1"> </span>UWB<span class="_ _1"> </span>passband<span class="_ _4"> </span>and<span class="_ _1"> </span>wider<span class="_ _4"> </span>upper</div><div class="t m0 x1 h6 ye ff4 fs3 fc0 sc0 ls1 ws0">stopband<span class="_ _4"> </span>can<span class="_ _c"> </span>be<span class="_ _4"> </span>achieved.<span class="_ _4"> </span>One<span class="_ _c"> </span>prototype<span class="_ _1"> </span>is<span class="_ _c"> </span>fabricated<span class="_ _4"> </span>for<span class="_ _4"> </span>demon-</div><div class="t m0 x1 h6 yf ff4 fs3 fc0 sc0 ls1 ws0">stration,<span class="_ _c"> </span>good<span class="_ _4"> </span>agreement<span class="_ _c"> </span>is<span class="_ _4"> </span>observed<span class="_ _c"> </span>between<span class="_ _c"> </span>simulated<span class="_ _4"> </span>and<span class="_ _c"> </span>mea-</div><div class="t m0 x1 h6 y10 ff4 fs3 fc0 sc0 ls1 ws0">sured<span class="_ _f"> </span>performances<span class="_ _f"> </span>of<span class="_ _f"> </span>the<span class="_ _1"> </span>UWB<span class="_ _f"> </span>&#64257;lter<span class="_ _8"></span>,<span class="_ _f"> </span>indicating<span class="_ _1"> </span>a<span class="_ _f"> </span>fractional<span class="_ _1"> </span>band-</div><div class="t m0 x1 h6 y11 ff4 fs3 fc0 sc0 ls1 ws0">width<span class="_ _c"> </span>of<span class="_ _d"> </span>124.6%<span class="_ _d"> </span>(3&#8211;11.6<span class="_ _d"> </span>GHz).</div><div class="t m0 x4 h5 y12 ff3 fs3 fc0 sc0 ls1 ws0">Index<span class="_ _7"> </span>T<span class="_ _3"></span>erms&#8212;<span class="ff4">Bandpass<span class="_ _7"> </span>&#64257;lter<span class="_ _7"> </span>(BPF),<span class="_ _7"> </span>fractional<span class="_ _7"> </span>band<span class="_ _2"></span>width</span></div><div class="t m0 x1 h6 y13 ff4 fs3 fc0 sc0 ls1 ws0">(FBW),<span class="_ _7"> </span>shorted<span class="_ _7"> </span>coupled<span class="_ _7"> </span>lines,<span class="_ _6"> </span>transversal<span class="_ _7"> </span>transmission<span class="_ _7"> </span>line,</div><div class="t m0 x1 h6 y14 ff4 fs3 fc0 sc0 ls1 ws0">ultra-wideband<span class="_ _d"> </span>(UWB).</div><div class="t m0 x8 h7 y15 ff1 fs4 fc0 sc0 ls1 ws0">I.<span class="_ _7"> </span>I<span class="fs5">NTR<span class="_ _8"></span>ODUCTION</span></div><div class="t m0 x1 h8 y16 ff4 fs6 fc0 sc0 ls1 ws0">T</div><div class="t m0 x9 h7 y17 ff1 fs4 fc0 sc0 ls1 ws0">HE<span class="_ _10"> </span>ultra-wideband<span class="_ _10"> </span>(UWB)<span class="_ _10"> </span>wireless<span class="_ _10"> </span>communication</div><div class="t m0 x9 h7 y18 ff1 fs4 fc0 sc0 ls1 ws0">technology<span class="_ _a"> </span>has<span class="_ _a"> </span>received<span class="_ _a"> </span>great<span class="_ _a"> </span>attentions<span class="_ _a"> </span>over<span class="_ _a"> </span>past<span class="_ _a"> </span>fe<span class="_ _2"></span>w</div><div class="t m0 x1 h7 y19 ff1 fs4 fc0 sc0 ls1 ws0">years,<span class="_ _e"> </span>especially<span class="_ _9"> </span>after<span class="_ _11"> </span>the<span class="_ _e"> </span>permission<span class="_ _9"> </span>of<span class="_ _9"> </span>the<span class="_ _9"> </span>unlicensed<span class="_ _9"> </span>opera-</div><div class="t m0 x1 h7 y1a ff1 fs4 fc0 sc0 ls1 ws0">tion<span class="_ _4"> </span>band<span class="_ _4"> </span>from<span class="_ _4"> </span>3.1<span class="_ _4"> </span>to<span class="_ _c"> </span>10.6<span class="_ _1"> </span>GHz<span class="_ _c"> </span>by<span class="_ _4"> </span>the<span class="_ _4"> </span>Federal<span class="_ _4"> </span>Communications</div><div class="t m0 x1 h7 y1b ff1 fs4 fc0 sc0 ls1 ws0">Commission<span class="_ _e"> </span>(FCC)<span class="_ _e"> </span>in<span class="_ _e"> </span>2002<span class="_ _e"> </span>[1].<span class="_ _9"> </span>As<span class="_ _e"> </span>one<span class="_ _e"> </span>of<span class="_ _e"> </span>the<span class="_ _9"> </span>most<span class="_ _e"> </span>important</div><div class="t m0 x1 h7 y1c ff1 fs4 fc0 sc0 ls1 ws0">microw<span class="_ _2"></span>av<span class="_ _2"></span>e<span class="_ _6"> </span>components,<span class="_ _6"> </span>&#64257;lters<span class="_ _6"> </span>with<span class="_ _6"> </span>high<span class="_ _6"> </span>performance<span class="_ _6"> </span>and</div><div class="t m0 x1 h7 y1d ff1 fs4 fc0 sc0 ls1 ws0">compact<span class="_ _c"> </span>size<span class="_ _d"> </span>are<span class="_ _d"> </span>highly<span class="_ _c"> </span>desirable<span class="_ _d"> </span>in<span class="_ _d"> </span>UWB<span class="_ _c"> </span>technology.<span class="_ _d"> </span>V<span class="_ _3"></span>arious</div><div class="t m0 x1 h7 y1e ff1 fs4 fc0 sc0 ls1 ws0">UWB<span class="_ _d"> </span>&#64257;lters<span class="_ _e"> </span>employing<span class="_ _d"> </span>ring<span class="_ _d"> </span>resonators,<span class="_ _e"> </span>short/open<span class="_ _e"> </span>stubs,<span class="_ _d"> </span>mul-</div><div class="t m0 x1 h7 y1f ff1 fs4 fc0 sc0 ls1 ws0">tiple-mode<span class="_ _c"> </span>resonators<span class="_ _d"> </span>were<span class="_ _d"> </span>designed<span class="_ _d"> </span>and<span class="_ _d"> </span>analyzed<span class="_ _d"> </span>[2]&#8211;[5].<span class="_ _d"> </span>For</div><div class="t m0 x1 h7 y20 ff1 fs4 fc0 sc0 ls1 ws0">con<span class="_ _8"></span>ventional<span class="_ _9"> </span>wideband<span class="_ _9"> </span>BPFs,<span class="_ _e"> </span>parallel<span class="_ _9"> </span>coupled<span class="_ _9"> </span>lines<span class="_ _9"> </span>with<span class="_ _9"> </span>high</div><div class="t m0 x1 h7 y21 ff1 fs4 fc0 sc0 ls1 ws0">impedance<span class="_ _c"> </span>and<span class="_ _d"> </span>strong<span class="_ _c"> </span>coupling<span class="_ _c"> </span>are<span class="_ _d"> </span>often<span class="_ _c"> </span>used<span class="_ _d"> </span>to<span class="_ _c"> </span>achieve<span class="_ _4"> </span>larger</div><div class="t m0 x1 h7 y22 ff1 fs4 fc0 sc0 ls1 ws0">fractional<span class="_ _12"> </span>bandwidth.<span class="_ _12"> </span>Ho<span class="_ _2"></span>wev<span class="_ _2"></span>er<span class="_ _8"></span>,<span class="_ _12"> </span>due<span class="_ _12"> </span>to<span class="_ _12"> </span>the<span class="_ _12"> </span>limitation<span class="_ _12"> </span>of<span class="_ _12"> </span>the</div><div class="t m0 x1 h7 y23 ff1 fs4 fc0 sc0 ls1 ws0">fabrication<span class="_ _9"> </span>precision,<span class="_ _11"> </span>it<span class="_ _9"> </span>is<span class="_ _11"> </span>very<span class="_ _9"> </span>dif&#64257;cult<span class="_ _9"> </span>to<span class="_ _11"> </span>realize<span class="_ _9"> </span>the<span class="_ _11"> </span>coupled</div><div class="t m0 x1 h7 y24 ff1 fs4 fc0 sc0 ls1 ws0">lines<span class="_ _9"> </span>of<span class="_ _11"> </span>high<span class="_ _13"> </span>impedance<span class="_ _9"> </span>and<span class="_ _11"> </span>a<span class="_ _11"> </span>tight<span class="_ _11"> </span>coupling<span class="_ _11"> </span>gap.<span class="_ _11"> </span>In<span class="_ _11"> </span>order<span class="_ _11"> </span>to</div><div class="t m0 x1 h7 y25 ff1 fs4 fc0 sc0 ls1 ws0">overcome<span class="_ _12"> </span>these<span class="_ _12"> </span>drawbacks,<span class="_ _14"> </span>sev<span class="_ _2"></span>eral<span class="_ _12"> </span>wide-band<span class="_ _14"> </span>planar<span class="_ _14"> </span>&#64257;lters</div><div class="t m0 x1 h7 y26 ff1 fs4 fc0 sc0 ls1 ws0">consisting<span class="_ _c"> </span>of<span class="_ _4"> </span>two<span class="_ _c"> </span>sections<span class="_ _c"> </span>of<span class="_ _c"> </span>the<span class="_ _4"> </span>parallel<span class="_ _c"> </span>transmission<span class="_ _c"> </span>line<span class="_ _c"> </span>were</div><div class="t m0 x1 h7 y27 ff1 fs4 fc0 sc0 ls1 ws0">proposed<span class="_ _13"> </span>in<span class="_ _13"> </span>[6]&#8211;[8],<span class="_ _13"> </span>by<span class="_ _a"> </span>using<span class="_ _11"> </span>forward-fed<span class="_ _13"> </span>signal-interference</div><div class="t m0 x1 h7 y28 ff1 fs4 fc0 sc0 ls1 ws0">concepts<span class="_ _c"> </span>applied<span class="_ _d"> </span>for<span class="_ _c"> </span>the<span class="_ _c"> </span>classic<span class="_ _d"> </span>transversal<span class="_ _c"> </span>&#64257;lter<span class="_ _c"> </span>designs,<span class="_ _d"> </span>wide-</div><div class="t m0 x1 h7 y29 ff1 fs4 fc0 sc0 ls1 ws0">band<span class="_ _c"> </span>BPFs<span class="_ _4"> </span>and<span class="_ _c"> </span>bandstop<span class="_ _c"> </span>&#64257;lters<span class="_ _c"> </span>can<span class="_ _4"> </span>be<span class="_ _c"> </span>easily<span class="_ _c"> </span>realized,<span class="_ _c"> </span>as<span class="_ _4"> </span>shown</div><div class="t m0 x1 h7 y2a ff1 fs4 fc0 sc0 ls1 ws0">in<span class="_ _12"> </span>Fig.<span class="_ _12"> </span>1(a).<span class="_ _a"> </span>Howe<span class="_ _2"></span>ver<span class="_ _8"></span>,<span class="_ _12"> </span>multi-section<span class="_ _12"> </span>transmission<span class="_ _a"> </span>lines<span class="_ _12"> </span>with</div><div class="t m0 x1 h7 y2b ff1 fs4 fc0 sc0 ls1 ws0">different<span class="_ _c"> </span>lengths<span class="_ _e"> </span>are<span class="_ _d"> </span>usually<span class="_ _d"> </span>cascaded,<span class="_ _e"> </span>occupying<span class="_ _d"> </span>larger<span class="_ _c"> </span>circuit</div><div class="t m0 x1 h7 y2c ff1 fs4 fc0 sc0 ls1 ws0">size,<span class="_ _c"> </span>and<span class="_ _d"> </span>the<span class="_ _d"> </span>fractional<span class="_ _d"> </span>bandwidth<span class="_ _c"> </span>of<span class="_ _d"> </span>these<span class="_ _d"> </span>&#64257;lters<span class="_ _c"> </span>is<span class="_ _d"> </span>still<span class="_ _d"> </span>narrow</div><div class="t m0 x1 h7 y2d ff1 fs4 fc0 sc0 ls1 ws0">for<span class="_ _13"> </span>UWB<span class="_ _13"> </span>applications.<span class="_ _13"> </span>An<span class="_ _a"> </span>impro<span class="_ _2"></span>ved<span class="_ _11"> </span>structure<span class="_ _13"> </span>having<span class="_ _13"> </span>a<span class="_ _13"> </span>180</div><div class="t m0 x1 h7 y2e ff1 fs4 fc0 sc0 ls1 ws0">phase<span class="_ _13"> </span>shift<span class="_ _a"> </span>based<span class="_ _13"> </span>on<span class="_ _a"> </span>the<span class="_ _13"> </span>double-sided<span class="_ _13"> </span>parallel-strip<span class="_ _a"> </span>line<span class="_ _13"> </span>with</div><div class="t m0 x1 h7 y2f ff1 fs4 fc0 sc0 ls1 ws0">wider<span class="_ _d"> </span>fractional<span class="_ _e"> </span>bandwidth<span class="_ _e"> </span>(123%,<span class="_ _d"> </span>0.43&#8211;1.66<span class="_ _e"> </span>GHz)<span class="_ _e"> </span>was<span class="_ _d"> </span>intro-</div><div class="t m0 x1 h7 y30 ff1 fs4 fc0 sc0 ls1 ws0">duced<span class="_ _a"> </span>in<span class="_ _a"> </span>[9].<span class="_ _13"> </span>But<span class="_ _a"> </span>two<span class="_ _a"> </span>additional<span class="_ _a"> </span>half-w<span class="_ _2"></span>av<span class="_ _2"></span>elength<span class="_ _a"> </span>open<span class="_ _13"> </span>stubs</div><div class="t m0 xa h9 y31 ff1 fs5 fc0 sc0 ls1 ws0">Manuscript<span class="_ _1"> </span>receiv<span class="_ _2"></span>ed<span class="_ _1"> </span>June<span class="_ _1"> </span>01,<span class="_ _1"> </span>2010;<span class="_ _1"> </span>accepted<span class="_ _4"> </span>June<span class="_ _1"> </span>22,<span class="_ _1"> </span>2010.<span class="_ _1"> </span>Date<span class="_ _1"> </span>of<span class="_ _1"> </span>publica-</div><div class="t m0 x1 h9 y32 ff1 fs5 fc0 sc0 ls1 ws0">tion<span class="_ _1"> </span>August<span class="_ _c"> </span>23,<span class="_ _1"> </span>2010;<span class="_ _4"> </span>date<span class="_ _4"> </span>of<span class="_ _4"> </span>current<span class="_ _4"> </span>version<span class="_ _1"> </span>October<span class="_ _4"> </span>06,<span class="_ _4"> </span>2010.<span class="_ _4"> </span>This<span class="_ _4"> </span>work<span class="_ _1"> </span>was</div><div class="t m0 x1 h9 y33 ff1 fs5 fc0 sc0 ls1 ws0">supported<span class="_ _f"> </span>by<span class="_ _1"> </span>the<span class="_ _f"> </span>Natural<span class="_ _1"> </span>Science<span class="_ _f"> </span>Foundation<span class="_ _1"> </span>of<span class="_ _f"> </span>Jiangsu<span class="_ _1"> </span>Province<span class="_ _f"> </span>(BK2008402)</div><div class="t m0 x1 h9 y34 ff1 fs5 fc0 sc0 ls1 ws0">and<span class="_ _4"> </span>the<span class="_ _4"> </span>National<span class="_ _c"> </span>Natural<span class="_ _4"> </span>Science<span class="_ _4"> </span>Foundation<span class="_ _4"> </span>of<span class="_ _4"> </span>China<span class="_ _c"> </span>(60971013).</div><div class="t m0 xa h9 y35 ff1 fs5 fc0 sc0 ls1 ws0">The<span class="_ _12"> </span>authors<span class="_ _12"> </span>are<span class="_ _12"> </span>with<span class="_ _12"> </span>the<span class="_ _12"> </span>Department<span class="_ _12"> </span>of<span class="_ _12"> </span>Communication<span class="_ _12"> </span>Engineering,</div><div class="t m0 x1 h9 y36 ff1 fs5 fc0 sc0 ls1 ws0">Nanjing<span class="_ _4"> </span>Univ<span class="_ _2"></span>ersity<span class="_ _1"> </span>of<span class="_ _4"> </span>Science<span class="_ _4"> </span>&amp;<span class="_ _4"> </span>T<span class="_ _2"></span>echnology<span class="_ _8"></span>,<span class="_ _4"> </span>Nanjing,<span class="_ _4"> </span>210094,<span class="_ _1"> </span>China<span class="_ _4"> </span>(e-mail:</div><div class="t m0 x1 h9 y37 ff1 fs5 fc0 sc0 ls1 ws0">yeeren_che@yahoo.com.cn;<span class="_ _4"> </span>fwj1985159@<span class="_ _c"> </span>yahoo.com.cn).</div><div class="t m0 xa h9 y38 ff1 fs5 fc0 sc0 ls1 ws0">Color<span class="_ _1"> </span>versions<span class="_ _4"> </span>of<span class="_ _4"> </span>one<span class="_ _4"> </span>or<span class="_ _4"> </span>more<span class="_ _1"> </span>of<span class="_ _4"> </span>the<span class="_ _4"> </span>&#64257;gures<span class="_ _4"> </span>in<span class="_ _4"> </span>this<span class="_ _4"> </span>letter<span class="_ _1"> </span>are<span class="_ _4"> </span>available<span class="_ _1"> </span>online</div><div class="t m0 x1 h9 y39 ff1 fs5 fc0 sc0 ls1 ws0">at<span class="_ _c"> </span>http://ieeexplore.ieee.org.</div><div class="t m0 xa h9 y3a ff1 fs5 fc0 sc0 ls1 ws0">Digital<span class="_ _4"> </span>Object<span class="_ _c"> </span>Identi&#64257;er<span class="_ _4"> </span>10.1109/LMWC.2010.2055840</div><div class="t m0 xb h9 y3b ff1 fs5 fc0 sc0 ls1 ws0">Fig.<span class="_ _1"> </span>1.<span class="_ _7"> </span>(a)<span class="_ _1"> </span>Circuit<span class="_ _4"> </span>of<span class="_ _1"> </span>a<span class="_ _4"> </span>transversal<span class="_ _1"> </span>&#64257;lter<span class="_ _4"> </span>and<span class="_ _1"> </span>(b)<span class="_ _4"> </span>circuit<span class="_ _1"> </span>of<span class="_ _4"> </span>proposed<span class="_ _1"> </span>UWB<span class="_ _4"> </span>BPF.</div><div class="t m0 xb h7 y3c ff1 fs4 fc0 sc0 ls1 ws0">were<span class="_ _a"> </span>needed<span class="_ _a"> </span>to<span class="_ _a"> </span>realize<span class="_ _a"> </span>the<span class="_ _a"> </span>isolation<span class="_ _a"> </span>of<span class="_ _a"> </span>the<span class="_ _a"> </span>two<span class="_ _a"> </span>transmission</div><div class="t m0 xb h7 y3d ff1 fs4 fc0 sc0 ls1 ws0">signals<span class="_ _d"> </span>and<span class="_ _d"> </span>thus<span class="_ _d"> </span>resulted<span class="_ _e"> </span>in<span class="_ _d"> </span>larger<span class="_ _c"> </span>circuit<span class="_ _d"> </span>size.</div><div class="t m0 xc h7 y3e ff1 fs4 fc0 sc0 ls1 ws0">In<span class="_ _14"> </span>this<span class="_ _12"> </span>letter,<span class="_ _12"> </span>a<span class="_ _14"> </span>nov<span class="_ _2"></span>el<span class="_ _14"> </span>UWB<span class="_ _12"> </span>BPF<span class="_ _14"> </span>implemented<span class="_ _14"> </span>with<span class="_ _14"> </span>two</div><div class="t m0 xb h7 y3f ff1 fs4 fc0 sc0 ls1 ws0">shorted<span class="_ _d"> </span>coupled<span class="_ _d"> </span>lines<span class="_ _c"> </span>and<span class="_ _d"> </span>a<span class="_ _d"> </span>270</div><div class="t m0 xd h7 y40 ff1 fs4 fc0 sc0 ls1 ws0">(at<span class="_ _d"> </span>center<span class="_ _d"> </span>frequency<span class="_ _15"> </span>of<span class="_ _c"> </span>the</div><div class="t m0 xb h7 y41 ff1 fs4 fc0 sc0 ls1 ws0">&#64257;lter)<span class="_ _a"> </span>transversal<span class="_ _13"> </span>transmission<span class="_ _a"> </span>line<span class="_ _a"> </span>is<span class="_ _a"> </span>proposed.<span class="_ _a"> </span>T<span class="_ _3"></span>wo<span class="_ _a"> </span>shorted</div><div class="t m0 xb h7 y42 ff1 fs4 fc0 sc0 ls1 ws0">coupled<span class="_ _13"> </span>lines<span class="_ _a"> </span>are<span class="_ _13"> </span>used<span class="_ _a"> </span>to<span class="_ _13"> </span>realize<span class="_ _a"> </span>the<span class="_ _13"> </span>broadband<span class="_ _13"> </span>and<span class="_ _a"> </span>an<span class="_ _13"> </span>ideal</div><div class="t m0 xb h7 y43 ff1 fs4 fc0 sc0 ls1 ws0">180</div><div class="t m0 xe h7 y44 ff1 fs4 fc0 sc0 ls1 ws0">phase<span class="_ _9"> </span>in<span class="_ _2"></span>verter.<span class="_ _e"> </span>The<span class="_ _9"> </span>270<span class="_ _16"> </span>transversal<span class="_ _e"> </span>transmission<span class="_ _11"> </span>line<span class="_ _9"> </span>is</div><div class="t m0 xb h7 y45 ff1 fs4 fc0 sc0 ls1 ws0">utilized<span class="_ _11"> </span>to<span class="_ _13"> </span>realize<span class="_ _13"> </span>good<span class="_ _13"> </span>impedance<span class="_ _13"> </span>matching<span class="_ _13"> </span>at<span class="_ _11"> </span>the<span class="_ _13"> </span>two<span class="_ _13"> </span>ports</div><div class="t m0 xb h7 y46 ff1 fs4 fc0 sc0 ls1 ws0">of<span class="_ _13"> </span>the<span class="_ _a"> </span>UWB<span class="_ _13"> </span>BPF.<span class="_ _13"> </span>In<span class="_ _a"> </span>addition,<span class="_ _13"> </span>due<span class="_ _13"> </span>to<span class="_ _a"> </span>the<span class="_ _13"> </span>180</div><div class="t m0 xf h7 y47 ff1 fs4 fc0 sc0 ls1 ws0">phase<span class="_ _13"> </span>differ<span class="_ _2"></span>-</div><div class="t m0 xb h7 y48 ff1 fs4 fc0 sc0 ls1 ws0">ence<span class="_ _9"> </span>for<span class="_ _11"> </span>the<span class="_ _11"> </span>two<span class="_ _9"> </span>paths<span class="_ _11"> </span>at</div><div class="t m0 x10 h7 y49 ff1 fs4 fc0 sc0 ls1 ws0">,<span class="_ _9"> </span>a<span class="_ _11"> </span>wider<span class="_ _11"> </span>upper<span class="_ _11"> </span>stopband<span class="_ _9"> </span>can<span class="_ _11"> </span>be</div><div class="t m0 xb h7 y4a ff1 fs4 fc0 sc0 ls1 ws0">achiev<span class="_ _2"></span>ed<span class="_ _9"> </span>without<span class="_ _9"> </span>adding<span class="_ _11"> </span>other<span class="_ _9"> </span>lowpass<span class="_ _9"> </span>or<span class="_ _9"> </span>bandstop<span class="_ _11"> </span>networks.</div><div class="t m0 xb h7 y4b ff1 fs4 fc0 sc0 ls1 ws0">The<span class="_ _d"> </span>theoretical<span class="_ _d"> </span>design,<span class="_ _d"> </span>simulation<span class="_ _d"> </span>and<span class="_ _d"> </span>experimental<span class="_ _d"> </span>results<span class="_ _d"> </span>are</div><div class="t m0 xb h7 y4c ff1 fs4 fc0 sc0 ls1 ws0">giv<span class="_ _2"></span>en<span class="_ _d"> </span>and<span class="_ _e"> </span>discussed.</div><div class="t m0 x11 h7 y4d ff1 fs4 fc0 sc0 ls1 ws0">II.<span class="_ _6"> </span>A</div><div class="t m0 x12 h7 y4e ff1 fs5 fc0 sc0 ls1 ws0">N<span class="_ _2"></span>AL<span class="_ _8"></span>YSIS<span class="_ _c"> </span>AND<span class="_ _d"> </span><span class="fs4">D</span>ESIGN<span class="_ _d"> </span>OF<span class="_ _d"> </span><span class="fs4">P</span>R<span class="_ _2"></span>OPOSED<span class="_ _d"> </span><span class="fs4">UWB<span class="_ _d"> </span>BPF</span></div><div class="t m0 xc h7 y4f ff1 fs4 fc0 sc0 ls1 ws0">Fig.<span class="_ _d"> </span>1(b)<span class="_ _e"> </span>shows<span class="_ _c"> </span>the<span class="_ _e"> </span>proposed<span class="_ _d"> </span>UWB<span class="_ _e"> </span>BPF<span class="_ _d"> </span>with<span class="_ _e"> </span>two<span class="_ _d"> </span>transmis-</div><div class="t m0 xb h7 y50 ff1 fs4 fc0 sc0 ls1 ws0">sion<span class="_ _9"> </span>paths<span class="_ _11"> </span>(Path<span class="_ _9"> </span>I<span class="_ _11"> </span>and<span class="_ _9"> </span>Path<span class="_ _11"> </span>II).<span class="_ _9"> </span>Path<span class="_ _11"> </span>I<span class="_ _9"> </span>consists<span class="_ _11"> </span>of<span class="_ _11"> </span>two<span class="_ _9"> </span>shorted</div><div class="t m0 xb h7 y51 ff1 fs4 fc0 sc0 ls1 ws0">coupled<span class="_ _11"> </span>lines<span class="_ _13"> </span>with<span class="_ _11"> </span>input<span class="_ _13"> </span>impedance</div><div class="t m0 x13 h7 y52 ff1 fs4 fc0 sc0 ls1 ws0">and<span class="_ _11"> </span>electrical<span class="_ _13"> </span>length</div><div class="t m0 x14 h7 y53 ff1 fs4 fc0 sc0 ls1 ws0">,<span class="_ _d"> </span>while<span class="_ _d"> </span>Path<span class="_ _d"> </span>II<span class="_ _d"> </span>is<span class="_ _d"> </span>a<span class="_ _e"> </span>270<span class="_ _10"> </span>(at<span class="_ _d"> </span>center<span class="_ _d"> </span>frequency<span class="_ _17"> </span>)<span class="_ _d"> </span>transversal</div><div class="t m0 xb h7 y54 ff1 fs4 fc0 sc0 ls1 ws0">transmission<span class="_ _d"> </span>line<span class="_ _d"> </span>of<span class="_ _e"> </span>characteristic<span class="_ _d"> </span>impedance</div><div class="t m0 x15 h7 y55 ff1 fs4 fc0 sc0 ls1 ws0">and<span class="_ _d"> </span>electrical</div><div class="t m0 xb h7 y56 ff1 fs4 fc0 sc0 ls1 ws0">length</div><div class="t m0 x16 h7 y57 ff1 fs4 fc0 sc0 ls1 ws0">.<span class="_ _c"> </span>The<span class="_ _c"> </span>characteristic<span class="_ _c"> </span>impedances<span class="_ _d"> </span>for<span class="_ _c"> </span>the<span class="_ _c"> </span>two<span class="_ _c"> </span>microstrip</div><div class="t m0 xb h7 y58 ff1 fs4 fc0 sc0 ls1 ws0">lines<span class="_ _d"> </span>at<span class="_ _d"> </span>the<span class="_ _d"> </span>input<span class="_ _d"> </span>/output<span class="_ _d"> </span>ports<span class="_ _d"> </span>are<span class="_ _d"> </span>all</div><div class="t m0 x17 h7 y59 ff1 fs4 fc0 sc0 ls1 ws0">.</div><div class="t m0 xb ha y5a ff2 fs4 fc0 sc0 ls1 ws0">A.<span class="_ _6"> </span>Characteristic<span class="_ _c"> </span>of<span class="_ _d"> </span>the<span class="_ _d"> </span>T<span class="_ _8"></span>wo<span class="_ _c"> </span>Shorted<span class="_ _d"> </span>Coupled<span class="_ _d"> </span>Stubs</div><div class="t m0 xc h7 y5b ff1 fs4 fc0 sc0 ls1 ws0">Fig.<span class="_ _9"> </span>2<span class="_ _11"> </span>shows<span class="_ _9"> </span>the<span class="_ _11"> </span>structure<span class="_ _11"> </span>of<span class="_ _11"> </span>the<span class="_ _11"> </span>two<span class="_ _9"> </span>shorted<span class="_ _11"> </span>coupled<span class="_ _11"> </span>lines</div><div class="t m0 xb h7 y5c ff1 fs4 fc0 sc0 ls1 ws0">and<span class="_ _4"> </span>its<span class="_ _4"> </span>equiv<span class="_ _2"></span>alent<span class="_ _4"> </span>circuit<span class="_ _4"> </span>model<span class="_ _c"> </span>[10].<span class="_ _4"> </span>Here<span class="_ _4"> </span>even-odd<span class="_ _1"> </span>mode<span class="_ _c"> </span>anal-</div><div class="t m0 xb h7 y5d ff1 fs4 fc0 sc0 ls1 ws0">ysis<span class="_ _11"> </span>is<span class="_ _13"> </span>used<span class="_ _11"> </span>to<span class="_ _13"> </span>illustrate<span class="_ _11"> </span>the<span class="_ _13"> </span>transmission<span class="_ _13"> </span>characteristic<span class="_ _11"> </span>of<span class="_ _13"> </span>the</div><div class="t m0 x18 h9 y5e ff1 fs5 fc0 sc0 ls1 ws0">1531-1309/$26.00<span class="_ _c"> </span>&#169;<span class="_ _c"> </span>2010<span class="_ _c"> </span>IEEE</div></div><div class="pi" data-data='{"ctm":[1.616162,0.000000,0.000000,1.616162,0.000000,0.000000]}'></div></div> </body> </html>
评论
    相关推荐
    • ug_altlvds.rar
      altera lvds 官方使用指南 2016年8月15日版本
    • GM5621-DAT-01F.rar
      gm5621 液晶控制器 数据手册,代理商那里拿到的。
    • AN3729.zip
      本应用笔记介绍flextimer的正确使用,一种新的飞思卡尔定时器模块,在交流/交流永磁同步电机控制中的应用。电机控制应用程序的具体要求对信号一致性定时器模块,互补信号产生的安全,并应用故障情况的处理。
    • Overview-of-HEVC.rar
      2O12年IEEE收录的一篇关于高效视频编码标准的综述,值得一看
    • vol2-no1-6.rar
      ho god thing 23 gggj gtee
    • GPU通用计算硬件架构合集
      Larrebee Tesla RV770三种新型GPU的架构文章 做GPGPU可参考
    • matlabcnhelp.rar
      matlab中文帮助很难找的,快速下载
    • MobilePolice.rar
      移动警察,车牌识别,车牌定位系统源代码,已经运用在移动车载稽查系统中。
    • SVM(matlab).rar
      支持向量机(SVM)实现的分类算法源码[matlab]
    • svm.zip
      用MATLAB编写的svm源程序,可以实现支持向量机,用于特征分类或提取