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Recent content by tzwei

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    how to measure the floor noise level in the PCB?

    Hi all: I am designing and debugging a RF/digital/analog mixed signal PCB board,but the performance is not very good,we doubt the PCB noise has some effect on the TX/RX performance, But I don't know how to measure the floor noise level in the PCB, Who knows that? thanks! SOS!
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    A rotating Smith Chart in pdf file

    About the color version smith chart Dear Flatulent: I have got it...misunderstanding....thanks very much!!
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    A rotating Smith Chart in pdf file

    About the color version smith chart Dear flatulent: Where is the color version Simth Chart? thanks! David_tang
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    RF filter calculation software

    Another filter calculation software It can help us evaluate the filter performance....
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    RF filter calculation software

    rf calculating software It will hep us analyze RF filter performance...
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    2.4GHz or 5.2GHz IFA (Inverted "F" Antenna),who ha

    ifa antenna Hi yellowtooth: I am also studying the PCB IFA antenna,But I don't know how can I measure it or evaluate its performance accurately. Can you instruct me some points? thanks!
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    Recommend: A dBm caluculation small software

    This is a smart,very good dbm calculation software...
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    A paper about mircorstrip antenna

    material
  9. T

    Americal FCC fequency Allocation

    Please reference it....
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    A rotating Smith Chart in pdf file

    A rotating Smith Chart This Smith chart is a rotating....
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    A Smith Chart in the pdf file

    A Smith Chart pdf file It can help you to calculate impedance matching using it.
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    About PCB microstrip line antenna design

    Hi: We are designing a WLAN card system, But we have not our own PCB mircorstrip line antenna pattern, then we want to design it ourself,but we are lack of its experience,then Who can help me OR instruct me some secret....thanks very much!!

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