FMUSER Wirless Transmit Video And Audio More Easier !

[email protected] WhatsApp +8618078869184
Language

    Of half Zhen Zitian line assemble with receive a standard 2

     

    Half semmetry brace up child with line of make a present of match
       General reception equipment (like the television) its input characteristic impedance to be 75 Ω (lopsided pattern) or 300 Ω balance type, half semmetry brace up child output is: M blows?5 Ω to balance type, it is OK to if balance cable join to need to consider impedance only with 300 Ω ,match, we can be used terminal λ is apart from on transmission line / 4 times odder the square that the equivalent impedance of place is equal to impedance of transmission line character is divided with terminal load this one characteristic undertakes impedance matchs character, the mathematical expression Zin=Z0*Z0/ZL of this one character, the Z0 in type is transmission line (match cable) characteristic impedance, zin is the output impedance of aerial, ZL is load (the input impedance that receives facility) impedance, half semmetry brace up child of as parallel as 300 Ω cable deserve to receive computation to be as follows: Xian Jiao persuading porcelain attacks angry box of grandma of busy of Hui of Ao  a round flat piece of jade with a hole in its center slaughters M, also should realize half semmetry namely brace up child of as parallel as 300 Ω cable deserve to receive must want to insert a λ between them / 4 long, characteristic impedance is the parallel cable of 150 Ω , for this, we use two λ / 4 long 300 Ω parallel cable are shunt-wound can, receive a law to be like graph X. Thinking stalks of grain

    please Click here to get our dipole antenna


     


    Half twists and turns closes brace up child
       Zhen Zitian line is using amount to actually in, it is to use amount to like feed Zhen Ziyi brace up child form, its are main the purpose is the bandwidth that increases aerial, amount to brace up child if graph Jk place is shown,the structure is formed, this plants such the frequency band character of aerial is OK coming that prove:  of confused ability of  of young Chi of Da of a surname danger illuminate this? can regard haw is two λ / the series connection of photograph of short circuit line of 4, to λ of L= of syntonic frequency wavelengh / 4, occasionally extremely aerial and short circuit line do not have reactance composition, should add amount to brace up child on the frequency of high frequency electric current is when certain limits change, appear the following 2 kinds of circumstances: Force comfortable? of heart of crazy Jin of attentively of heart arrow smile is equivalent to L> λ / 4, occasionally extremely aerial grows approximately at λ / the short circuit line of 4, its reactance is perceptual, and right now the reactance of short circuit line is look sex, when frequency under syntonic frequency when, be equivalent to L< λ / 4, occasionally extremely aerial is approximate at λ / the open circuit line of 4, its reactance is look sex, and right now short on-line reactance is perceptual; reason when working frequency when unripe deflection, inside certain frequency limits, amount to brace up child on the inductance that appear and capacitive reactance can be compensated each other, make aerial is inside wider frequency range the change of its impedance character is not big, this is amount to brace up child the principle that has more broadband area.

    please Click here to get our dipole antenna





        As a result of amount to brace up child two parallel conductor are had phasic and identical, the electric current with equal size (namely so its radiate electric current is I1=I2) I=I1+I2=2I1, its radiate power is P=I*I*Rr=(2I1)* (2I1) *Rr(Rr is half brace up child input impedance) in amount to brace up child the power input P =4*I1*I1*Rr= (Rin that feed carries is amount to brace up child input impedance) because be in,the electric current that feed end inputs is I actually, place I=I1, so we got amount to here brace up child input impedance is 300 Ω . It is symmetrical half brace up child 4 times what input impedance. To solve as coaxial as 75 Ω cable and antenna brace up child connection, use length to be λ / of the coaxial line make it of 2 phasic, impedance shift device, the U form ring that often makes namely, can solve above the Jk2 of knot composition of a picture of annulus of form of two problems.U is shown as follows.
       From the graph knowable, after the B when feed nods electric current to pass U form annulus, with the electricity that A burns phasic difference is π (180 degrees of) , the outer conductor of U form annulus comprised λ / the short circuit line of 4, make in A, the impedance on B dot is infinity, consequently the electric current on outer conductor won't by inside watch wall flows to outside wall to reach the ground, and U form annulus is returned had the effect that impedance alternates, if electric current is inputted to be I1 in on-line of coaxial line core, input voltage is V1, criterion aerial two brace up child the input electric current that go up is I1 respectively, and coaxial wire outer conductor is ground connection, so A, b was opposite severally at 2 o'clock the voltage of the ground is V1, and A, voltage was B at 2 o'clock instead, reason this A, the voltage between 2 o'clock is B VA+VB=2V1, the impedance that in feed the dot presents is: R==After 4V1/I1 introduces U form link namely, the impedance that makes line of make a present of and day line contact are nodded rose fourfold, if use characteristic impedance to be the coaxial line feed of 75 Ω , the impedance that nods in feed is Ω of 4=300 of 75 Ω × , it is better to can be achieved with amount to booklet in accordion form with a slipcase match.

    please Click here to get our dipole antenna

     

     

     

     

     

    List all Question

    Nickname

    Email

    Questions

    Our other product:

    Professional FM Radio Station Equipment Package

     



     

    Hotel IPTV Solution

     


      Enter email  to get a surprise

      fmuser.org

      es.fmuser.org
      it.fmuser.org
      fr.fmuser.org
      de.fmuser.org
      af.fmuser.org ->Afrikaans
      sq.fmuser.org ->Albanian
      ar.fmuser.org ->Arabic
      hy.fmuser.org ->Armenian
      az.fmuser.org ->Azerbaijani
      eu.fmuser.org ->Basque
      be.fmuser.org ->Belarusian
      bg.fmuser.org ->Bulgarian
      ca.fmuser.org ->Catalan
      zh-CN.fmuser.org ->Chinese (Simplified)
      zh-TW.fmuser.org ->Chinese (Traditional)
      hr.fmuser.org ->Croatian
      cs.fmuser.org ->Czech
      da.fmuser.org ->Danish
      nl.fmuser.org ->Dutch
      et.fmuser.org ->Estonian
      tl.fmuser.org ->Filipino
      fi.fmuser.org ->Finnish
      fr.fmuser.org ->French
      gl.fmuser.org ->Galician
      ka.fmuser.org ->Georgian
      de.fmuser.org ->German
      el.fmuser.org ->Greek
      ht.fmuser.org ->Haitian Creole
      iw.fmuser.org ->Hebrew
      hi.fmuser.org ->Hindi
      hu.fmuser.org ->Hungarian
      is.fmuser.org ->Icelandic
      id.fmuser.org ->Indonesian
      ga.fmuser.org ->Irish
      it.fmuser.org ->Italian
      ja.fmuser.org ->Japanese
      ko.fmuser.org ->Korean
      lv.fmuser.org ->Latvian
      lt.fmuser.org ->Lithuanian
      mk.fmuser.org ->Macedonian
      ms.fmuser.org ->Malay
      mt.fmuser.org ->Maltese
      no.fmuser.org ->Norwegian
      fa.fmuser.org ->Persian
      pl.fmuser.org ->Polish
      pt.fmuser.org ->Portuguese
      ro.fmuser.org ->Romanian
      ru.fmuser.org ->Russian
      sr.fmuser.org ->Serbian
      sk.fmuser.org ->Slovak
      sl.fmuser.org ->Slovenian
      es.fmuser.org ->Spanish
      sw.fmuser.org ->Swahili
      sv.fmuser.org ->Swedish
      th.fmuser.org ->Thai
      tr.fmuser.org ->Turkish
      uk.fmuser.org ->Ukrainian
      ur.fmuser.org ->Urdu
      vi.fmuser.org ->Vietnamese
      cy.fmuser.org ->Welsh
      yi.fmuser.org ->Yiddish

       
  •  

    FMUSER Wirless Transmit Video And Audio More Easier !

  • Contact

    Address:
    No.305 Room HuiLan Building No.273 Huanpu Road Guangzhou China 510620

    E-mail:
    [email protected]

    Tel / WhatApps:
    +8618078869184

  • Categories

  • Newsletter

    FIRST OR FULL NAME

    E-mail

  • paypal solution  Western UnionBank OF China
    E-mail:[email protected]   WhatsApp:+8618078869184   Skype:sky198710021 Chat with me
    Copyright 2006-2020 Powered By www.fmuser.org

    Contact Us