Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
but as we know, the handset integrate more and more functionsthe ,and the dimension left for the FM antenna is so limited. my projects just give the FM antenna 10*50 dimesion in the mechanical sides. i try to tune the antenna patten as a monopole ,but failed :(
anybody can share some...
patch antenna design for fm
hi guys,
as we know, we usually use the earphone cable as FM antenna in the hanset. but we plan to design an embeded antenna so that we can discard the earphone.does anybody have such experience? waiting for your help?
thanks!:D
sivon
as we know , in GSM system, the rx signal should first go to a saw filter and balun, then it is converted to differential signal to have better performance. the differential signals should match to the input impedence of Transciever? how to do the matching? if i wanna simulate the matching by...
i am a rf engineer from china , and my main fields are the GSM handset . i wanna know which websites do the rf engineers usually browese. could anyone introduce some good website for me? many thanks!
as we know, the RX part of GSM900 should convert the common signal to the diff. signal for more immunity. i need to match the diff. signal to LNA for better rx sensitivity. how to determine the value of L1 ,L2 ,C1, C2? Thanks!:D
thanks all! if the conductive spurious emmision is good , is it useful to add the LPF circuits after the PA output? Our company does not have the standard EMC detecting system.is it meaningful to use the coarse probe to detect the source of noise? how to make the simple probes? thanks very...
hi guys,
the phone's 2nd conductive spurious emmision is ok, the performance is better than -40dBm, while the 2nd radiated spurious emmision failed. the peformance is even -2dBm.
would the kind-hearted guys tell me which parts can effect the RSE, thanks!
Thanks for your reply, but we can not change the pattern now ,because we have to save the R&D time. As we can conclude the following equation:
EIRP(dBm)=TRP(dBm)+G(dBi)-e(dB)
So it shows just what you have suggested, however,in the real world,as we can't change the pattern now, and if the...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
