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.
hi lupin:
now my lower substrate(feeding one) is er=4.6(h=1mm),the up substrate is er=2.65 (h=4mm),just one input ,that is to say one microstrip flows over the four sides of the cross aperture ,90 degree phase lags one side by one side.
but how to know the higher order modes?
what's more...
the structure determines the radiation pattern ,so ,when you change the feeding point ,the pattern doesn't change ,but the vswr changes as well as the efficiency
dear lupin:
the structure of my antenna is as the same of yours (the frequency is around 3GHz),circular polarized,my aim is gain 3db within 12%bandwith,but now the gain is very low(about 1db,below 0db at somepoint)! i want to improve the gain too! it's a big problem!
Re: *ATTENTION: "RF" & "Antennas" to
:wink:
antenna and rf cannot be separated .
because: a RF system may include an antenna,or to make an good antenna shoud use RF theory at the mean time.eg: sometimes you will design an active antenna. Furthermore ,now an antenna is not just an antenna...
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.
