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HI everybody i am trying to reproduce the results in this paper for s11 and axial ratio in both HFSS and CST in fact i have trouble with CPW fed antenna thanks in advance Zhang et al. - 2013 - CPW-fed broadband circularly polarized planar monopole antenna with improved ground-plane structure.pdf CPW-Fed Broadband Circularly Polarized Planar Monopole Antenna With Improved Ground-Plane Structure.cst CPW-Fed Broadband Circularly Polarized Planar Monopole Antenna With Improved Ground-Plane Structure.igs CPW-Fed Broadband Circularly Polarized Planar Monopole Antenna With Improved Ground-Plane Structure.stp

Hi everyone as all of us know the advantages of electromagnetic simulation is to safe time and effort this antenna is CP antenna with truncated edges in HFSS software i cannot get the desired Axial ratio while in cst i get the desired axial ration for single frequency monitor while for broadband it is not achieved how to plot the axial ration VS frequency in CST how to know the accurate results winch could be agreed with the measurements, for example in cst axial ratio which one i should trust single frequency monitor or broad band monitor thanks all cp.hfss 1.575G_CircularlyPolarizedPatch_BackFed_FR4.cst cpp.stp cpp.igs hfsscp.iges hfsscp.step

please upload cst file of this model thanks

i think it should not touch it

the result with hfss it is also good , only the axial ratio not tuned cpw.hfss

Hi admin it works well, we should not let the SMA body touch the patch this is the results and cst file cpw-fed-antenna.cst

in this attempt s11 is perfect is matched with the measurment result but axial ratio still not tuned CPW-Fed Broadband Circularly Polarized Planar Monopole Antenna With Improved Ground-Plane Structure1.hfss

can you upload the cst file

feeding position at 11 dimension in mm

cpp.igs cpp.sat cpp.sat

1.575G_CPP_FR4.cst

in this exaple of HFSS the axial ratio as desired below 3db