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  1. antenna21

    Balun

    Hello Guys, Do you know any company where I can find a balun to connect my 300ohm balanced antenna to 50 ohm unbalanced transmitter. frequency of interest is 915 MHz. I really appreciate your help. thanks
  2. antenna21

    help needed regarding Txline antenna

    Hello RF0, Can you send me the link if you find what VE1BLL is talking about. thanks
  3. antenna21

    help needed regarding Txline antenna

    Hello VE1BLL, Thanks for the reply. May be its dumb question but I dont understand what is OEM you mentioned about checking application notes. thanks
  4. antenna21

    Need some info

    Hello RF0, I am also trying to findout more about txline antenna, can you send me some info. thanks
  5. antenna21

    Need some info

    Thanks for the reply.
  6. antenna21

    magnetic antenna

    Hi RF0, What you said is right, I am looking for a magnetic antenna which has good gain. thanks
  7. antenna21

    magnetic antenna

    Hello Thanks for the information. I learn lot of new things by reading this board. Thanks again for your help. For my antenna problem, those reaceving antennas (small loop antennas) we are using, I cant change those antennas. I dont have that freedom, I need to design TX antenna to send...
  8. antenna21

    magnetic antenna

    Hi, The antennas we have are receiving antennas, I need to design Tx antenna. I think if I use small loop antenna for transmitting it is not going give me enough read range. May be I am wrong about that. We are using magnetic antennas beacuse water can obserb some of the electric field if not...
  9. antenna21

    magnetic antenna

    Hello, Thanks for reply. Can we use ordinary monopole as magnetic antenna? We already have small loop antennas at the other end, so I need to design some magnetic antenna which can comunicate with those small loop antennas. One more thing we are using magnetic antennas beacuse we might need to...
  10. antenna21

    magnetic antenna

    Hi, Sorry about the that. Antenna details: frequency: 900-950 MHZ approximately size of the antenna: doesnot matter, as long as it is not in some meters range approximate gain: I want as much gain as possible. Polarization: linear is fine but circular is better. environment: room temepareture...
  11. antenna21

    magnetic antenna

    Thanks for the reply, I am trying to design UHF magnetic antenna. do you have any suggestions at that frequency? by which antenna I can get the best performance possible? thanks
  12. antenna21

    magnetic antenna

    Hello all, I am looking for magnetic antenna for UHF. I am trying loop but with loop antenna I am facing tuning capacitors problems like at UHF we need very low pico farad capacitors. Do you guys have any suggestions? thanks
  13. antenna21

    Near field antenna

    Thanks brian
  14. antenna21

    Near field antenna

    Hello Really thanks for the reply. I am trying to design near field antenna for UHF RFID reader. We need some kind of coupling in near field for RFID system to work. HF RFID systems use magnetic coupling with the help of two electrically small loop antennas ( one in reader and one in tag). But...
  15. antenna21

    Near field antenna

    Hi I dont have any restriction on antenna size, it can be any size but I need a good antenna for near field reading. thanks again
  16. antenna21

    Near field antenna

    Hi, thanks for the reply. I am trying to design UHF RFID near field reader antenna, from what I understand, when you make dipole with much less lenth than required half wavelenth and able to match the impedance, that dipole antenna can acts as a good near field antenna than the far field...
  17. antenna21

    Near field antenna

    Please guys show me some light, Iam totally confused about it.
  18. antenna21

    Near field antenna

    Hello guys, I am looking for UHF (915 MHZ) near field antenna. Can anybody help me regarding what are the possible types like one possiblity is small dipole antenna. Can we design a microstrip patch antenna for near field response. It will really help me if you guys can give links to some...

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