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Recent content by aaiiwwaa

  1. A

    Anybody hear about 4-band helical antenna?

    Anybody hear about 4-band helical antenna? for GSM900, DCS1800, PCS1900, Wlan 802.11g(2.4G) I am looking for it. Please give me some infromation, company, paper ....and so on. Thanks for your help very much
  2. A

    need C/N vs BER data for ofdm

    c/n eb/nt I need C/N vs BER data for ofdm . Please help me Thanks so much
  3. A

    How to calculate field strength in dbuV

    field strength calculation I know the input powe(dbm)r to antenna and the antenna gain. How can I calculate the EM field strength in dbuV at a distance to the antenna. Please help me. Thanks
  4. A

    Notch filter reflect rejection_band power ?

    Hi! marcodd , Can I say if the notch filter is dissipative then the S11 of the filter is close to 50 ohm. On the other hand if the notch filter is reflective then the S11 of the filter is far from 50 ohm. Could you give me some comment? Thanks a lot
  5. A

    How to measure the dielectric constant of a PCB. Any paper ?

    How to measure the dielectric constant of a PCB. Any paper ? Thanks for anyone's help.
  6. A

    Notch filter reflect rejection_band power ?

    I have a question regarding notch filter usage. When I use notch filter, will the rejection band power bounce back to DUT? Should I add Circulator or directional coupler between notch filter and DUT? Thanks for suggestion :?:
  7. A

    What is the best VCO? Minicircuit or Synergy microwave?

    Z-comm is also good and cheap
  8. A

    fractional-N vs integer-N frequency synthesizer?

    what is a fractional synthesizer if lock-in time is important fractional-N is faster.
  9. A

    FR4 dielectric constant

    fr4 dielectric properties 3.6 @ 30MHz 4.1 @ 1GHz
  10. A

    Simulation with IE3D - which result is more accurate

    try to change mesh freq to 10GHZ The result should be close.
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