로그인

검색

Home
✔ 뷰어로 보기
기타
2010.07.10 11:16

how to confirm the impedance of the microstrip?

모아레
조회 수 776 추천 수 0 댓글 0
?

단축키

Prev이전 문서

Next다음 문서

가 크게 작게 위로 아래로 게시글 수정 내역 댓글로 가기 인쇄
?

단축키

Prev이전 문서

Next다음 문서

가 크게 작게 위로 아래로 게시글 수정 내역 댓글로 가기 인쇄

mckinson



Joined: 03 Sep 2003
Posts: 136
Post28 Nov 2004 15:24   

Hello ,about the 50 ohms microstrip !
Hello ,guys . Anybody knows how to confirm the impedance of the microstrip ?
For example ,I have simulated the width of the microstrip for 50 homs .But I don't
know whether the impedance of pcb tracks from pcb manufactory is correct ? How to confirm ? Best regards !
Back to top
Google
AdSense
Google Adsense

 

http://www.edaboard.com/ftopic98986.html

28 Nov 2004 15:24   

Ads


Back to top
BigBoss



Joined: 17 Nov 2001
Posts: 1177
Helped: 89
Location: Earth
Post28 Nov 2004 18:38   

Re: Hello ,about the 50 ohms microstrip !
mckinson wrote:
Hello ,guys . Anybody knows how to confirm the impedance of the microstrip ?
For example ,I have simulated the width of the microstrip for 50 homs .But I don't
know whether the impedance of pcb tracks from pcb manufactory is correct ? How to confirm ? Best regards !


Connect an 50 Ohm low ESR and inductance resistor (or 2 parallel 100 Ohm) at the end of line and measure with VNA.
Back to top
vfone



Joined: 10 Oct 2001
Posts: 2578
Helped: 358
Post28 Nov 2004 22:45   

Re: Hello ,about the 50 ohms microstrip !
You don’t need any extra components. Just measure with Network Analyzer, that is connected at both ends of the line.
Back to top
sergio mariotti



Joined: 22 Dec 2003
Posts: 469
Helped: 43
Location: Italy
Post29 Nov 2004 0:03   

Re: Hello ,about the 50 ohms microstrip !
vfone wrote:
You don’t need any extra components. Just measure with Network Analyzer, that is connected at both ends of the line.

Yes, correct, but usually it may be experimented that measured Zo differ a lot from the simulated one, also in the case that all is correct and well manufactured.
This is due to end effects and ľstrip launchers.
To reduce this effect and focalize the attention to the line only, use a Time Domain VNA. Both Agilent and Anritsu have very efficent and useful TD algoritms.
Back to top
mckinson



Joined: 03 Sep 2003
Posts: 136
Post29 Nov 2004 16:14   

Hello ,about the 50 ohms microstrip !
Appreciated !Do you think that is accurate measure the character impedance Z0 by the VNA ?
Could you please tell me the detail stap for measurement ? Best regards !
Back to top
vfone



Joined: 10 Oct 2001
Posts: 2578
Helped: 358
Post29 Nov 2004 17:59   

Re: Hello ,about the 50 ohms microstrip !
By definition the main designation of VNA is to measure impedances.
Time Domain Reflectometry (TDR) is more accurate than frequency domain Vector Network Analysis (VNA), because do not depend by frequency.
But for commercial applications frequency domain is more than ok.
Check this document:
http://cp.literature.agilent.com/litweb/pdf/5968-1947E.pdf
Back to top
hitmo



Joined: 04 Jan 2005
Posts: 40
Post13 Jan 2005 18:55   

Re: Hello ,about the 50 ohms microstrip !
u can also do it with network ana. just measure inserstion loss and return loss on smith chart. return loss will tell u the impedance of the line. if the rerunloss is as close as possible to center of the smith chart its a 50ohm line

Who's 모아레

profile
Facebook Twitter Google Pinterest KakaoStory Band
위로 아래로 게시글 수정 내역 댓글로 가기 인쇄
에디터 선택하기
?
에디터 사용하기 닫기

  1. 회사 목록

    Date2011.02.07 By모아레 Views20375
    read more

  2. 연락처 목록

    Date2010.08.05 Category메모 By모아레 Views638
    read more

  3. 유용한 사이트

    Date2010.02.25 Category메모 By모아레 Views7257
    read more

  4. 메모 정리 (미완)

    Date2009.10.30 Category메모 By모아레 Views272
    read more

  5. 연구실 장비 목록

    Date2009.09.30 Category메모 By모아레 Views1017
    read more

  6. 주문, 구입 리스트

    Date2009.09.21 Category메모 By모아레 Views831
    read more

  7. To do list, Short Memo

    Date2009.08.20 Category메모 By모아레 Views927
    read more

  8. MALDI 설명

    Date2011.02.13 By모아레 Views14656
    Read More

  9. SEM specification

    Date2010.01.26 Category자료 By모아레 Views14331
    Read More

  10. [사람과 이야기] 방학을 잊은 교수들… "과학에 희망 있어요"

    Date2010.01.03 Category기타 By모아레 Views6119
    Read More

  11. 아세톤 메탄올 IPA 사용에 관한 포스트

    Date2009.08.18 Category자료 By모아레 Views5561
    Read More

  12. 반도체공동연구소(반공연) 공정접수 내용

    Date2010.02.01 Category메모 By모아레 Views4187
    Read More

  13. A huge quantum resonator

    Date2010.03.24 Category논문 By모아레 Views3556
    Read More

  14. 연구실 서버를 위한 리눅스 관리 가이드

    Date2009.11.10 Category메모 By모아레 Views2825
    Read More

  15. 교내개발 소프트웨어 배포 - snu메일

    Date2010.02.23 Category자료 By모아레 Views2422
    Read More

  16. Al2O3 etch

    Date2010.07.19 Category자료 By모아레 Views2020
    Read More

  17. 어디서 먼지들이 샘플에 다닥다닥붙는지 체크할것

    Date2010.02.20 Category메모 By모아레 Views2016
    Read More

  18. 라만 측정의 이해

    Date2010.05.10 Category자료 By모아레 Views1989
    Read More

  19. 로타리펌프 견적서관련

    Date2009.08.20 Category메모 By모아레 Views1986
    Read More

  20. Lieber Appointed Coeditor Of Nano Letters

    Date2009.10.26 Category기타 By모아레 Views1831
    Read More

  21. BOE(Buffered oxide etch)

    Date2010.01.11 Category자료 By모아레 Views1770
    Read More

  22. (에소 머신을 위한) PID 장착 방법!

    Date2010.09.13 Category자료 By모아레 Views1590
    Read More

  23. 연구실에서 구입했었던 모니터, 외장하드디스크, 하드디스크

    Date2009.08.07 Category메모 By모아레 Views1386
    Read More

  24. PS/2 케이블 and 어댑터

    Date2011.02.07 By모아레 Views1226
    Read More

  25. 오실로스코프의 이해와 올바른 사용법

    Date2009.09.13 Category자료 By모아레 Views956
    Read More

  26. Introduction to Temperature Controllers

    Date2010.09.14 Category자료 By모아레 Views811
    Read More

  27. how to confirm the impedance of the microstrip?

    Date2010.07.10 Category기타 By모아레 Views776
    Read More
쓰기
Board Pagination Prev 1 2 3 4 ... 5 Next
/ 5