Recent content by antenna21

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

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

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

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

Thanks for the reply.

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

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...

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...

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...

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...

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

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

Thanks brian

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...

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