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38 Threads found on edaboard.com: Gain Directivity Hfss
Hello, I am trying to design dual band microstrip patch antenna but I calculate very low directivity, gain values. I am trying to solve this for few days but I couldn't. Could you please help me? Thanks... 133090
obtained negative antenna gain despite the positive directivity. This is caused by loss in the antenna: lossy dielectric material and conductor losses. On lossy substrates like FR4, the gain of patch antennas is pretty bad, and your simulation shows that if you include the dielectric losses (tand) in the simulation.
hi everyone,i have a project in hfss , i get good wsvr and s11 values but i cant have directivity and gain as i want. i uploaded my project here can anyone say what is wrong with my project ? 90907
i m beginner in hfss can u tell me how plot gain vs freq graph,radiation pattern,directivity vs frequency,co and cross polarization...if any doc then upload...pls help..
hello everyone.. i have design rectangular microstrip antenna but i dont know how to plot gain vs freq and radition pattern,directivity such parameter... also i m not able to find what that graph represent pls help...
Sorry i run CST. In CST you add the FARFIELD option and you see how the antenna radiate the gain directivity etc.... i think it would similar in hfss
hi i,ve designed a pifa antenna and simulated it with both ie3d and hfss, gain, s parameters, impedance and directivity are the same but electric field pattern are not!, i know this is caused by difference in method of MOM and FEM but how can i scale voltage source in IE3D or power source in hfss to get the same electric (...)
hi everybody i have designed a patch antenna in hfss for 100 MHz i am getting fine RL at 100 MHz but the other antenna parameters gain, directivity etc. are not quite well , i am unable to understand this problem can anyone help me in this regard please, my email id in engineermohsinali@gmail.com, if any expert is interested i can se
hy for all I'm trying to simulate rfid microstrip antenna with complex input impedance witch 25.5 +145*j i used a lumped port for the exitation my problem is that when i use a power of 1w as source i find in result incident power = 5.74 accepted power = 0.17 radiated power is 0.06 the obtained gain is 0.45 and the directivity is 4.82
gain antennas are a poor choice for gps. Their directivity will produce negative gain in other directions. These satellites cover the whole half sphere sky. You need to be able to receive signals from them wherever they are.
hi I am using hfss V11. I was unable to plot S parameter,VSWR? Pls refer to the attached the screen shots. I was unable to choose VSWR and S parameter beside gain and directivity. Please advise. thank you .
hfss calculates directivity, gain, and power radiated, but I was wondering if I can measure them physically (without a simulator). If so, what equipment, technique, etc. is used for that? Please reply ASAP as I have a presentation due soon. Thanks
The radiation pattern (i.e. gain/directivity) calculated by hfss does not change with S11. S11 stands for the impedance matching performance, which is another paramter different from far-field gain/directivity.
hello, I have been using hfss to design an Antenna at 867Mhz.But the gain that i am getting is -4.9bd and directivity around the same.I have miniaturized the patch antenna.I have even physically implemented it with a reader and got 5 feet range for the tag in vertical and horizontal orinetation.But as the gain is (...)
hi can any one help to get calculation of antenna gain from the total radiated power ver. frequency.
the gain is a little larger than directivity in hfss, even for simple dipole. How can this happens? can anyone give me some hints? thanks!
I was building UHF phobe exactly as the handbook says,but when I tried to create far field overlay, I couldn't find 'gain' among category of the Mag Tab. I just see those options in the blank: Variables Output Variables rE directivity Polarization Ratio Axial Ratio Antenna Params Design I cannot find the 'gain' (...)
hi my friend. if you have all your simulations done right.then you will have to include far fiedl setup under the radiation icon.then go to results and right click ---> will show you far field click on it and a window will show up.plot your gain and directivity from there take care.
hello i am designing a recatangular patch using hfss by coaxial feed and microstrip feed . i want to know how to take the feed points . so that i can improve the gain , directivity and S11 parameters regards . ref
Hi.... I want to simulate offset-parabolic reflector in hfss v9 i have need to know what the relation between (directivity, gain, beam width ) and parabola focal length and its diameter.