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Recent content by xiyx

  1. X

    how to get the noise figure of the antenna by measurement

    hi, everybody, i wanna test the noise figure of the antenna? how can i get it? does anybody have some papers about it? thx a lot. to my best rgs, xiyx
  2. X

    Is it possible to design an antenna for both 2.4G and 5.8G?

    Re: Is it possible to design an antenna for both 2.4G and 5. if possible, pls check the ieee mwcl magazine. in the recent volumes, there is a proper paper about it.
  3. X

    ADS training notes for the ADS Beginner self study Guide

    Re: ADS training notes good person. can you have some examples about antenna?
  4. X

    how about aia (active integrated antenna)?

    now i am doing some research about this? about 3 years before, it is a very hot topic. but it seems a little cooler? can somebody give some suggestion about it? thx. to my best regards,
  5. X

    Is it possible to integrate an antenna to a monolith IC?

    Re: integrated antenna i need these papers also. but due to my poor points, i cannot download all these. can somebody send them to my email? it's xiaoyongxuan@ee.buaa.edu.cn. thx. to my best regards Added after 7 minutes: to tomcat_x, is your research about aia (active integrated...
  6. X

    want a superabrupt varactor operating at S band

    thx, alex, but now i have used the bb833, but from the datasheet i found this element only can be used up to 2.5ghz. now i need it to work steadily up to 4ghz at least. have you used it in this freq. band? looking forward to your reply. best rgs, xiyx
  7. X

    want a superabrupt varactor operating at S band

    hi, boy, can you give me something more detail about this? why will design an overtone oscilator? i cannot get it. thx. and i have found some varactors with capacitance < 1pf, e.g. bb833 fabricated by infineon. best regs, xiyx
  8. X

    want a superabrupt varactor operating at S band

    thx, boy, but i think the tunable capacitance range is a little small. i need a big capacitance ratio and min. capacitance is below 1pf. can you give me some information about this? regs, xiyx
  9. X

    want a superabrupt varactor operating at S band

    1pf varactor The tune range has to include 0.7~9pF, and reverse tune voltage can be less than 30V. Can someone give me some manufacture information on this? Thx. best rgs, xiyx
  10. X

    does someone know something about tunable notch filter

    how about 3~5G? and can you give me some suggestion? thx. rgs, xiyx Added after 5 minutes: thx. but can you recomand some compact configuration? rgs, xiyx
  11. X

    does someone know something about tunable notch filter

    hello, everyone, can someone tell me where i can get a tunable notch filter product with wide dynamic tuner range, small size and dc controll tune, etc.? thanks for all about this. rgs, xiyx
  12. X

    looking for wideband lna manufacturer with uwb bandwidth

    lna manufacturer hi, all, can somebody tell me some informations on the wideband lna manufacturer with uwb bandwidth? such as 3~7GHz. thank you for your information. rgs,
  13. X

    Simulating fractal antenna

    i think ansoft designer can do the same things also. but comparing to ie3d, it's a little weak, the same as ads momentum. fyi regs
  14. X

    Substrate for small patch

    Do you look for it from Roger Ltd.? If not, pls try it. Rgs

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