circular patch antenna design in HFSS

[gitanjalikalbhor]

in hfss the gain that it shows doesn't get added up to the incident power.why?then what it's significance....
pls can anybody help me with this problem??

 

[SpaceDust]

What do u mean by incident power here ?? is it input power ?? Isn't Gain a ratio and so is independent of input power that u give..

 

[gitanjalikalbhor]

its a ratio i know that .. but i am asking that in HFSS the gain u get for an antenna doesn't get added up (in db) to your input power??
power radiated must be equal to your power input+ gain(in db)+ some losses... isn't it like that??

 

[SpaceDust]

No it is no like that.. The calculations are to be done with respect to the input power but the input is not added in the gain value..!! Y dont u try simulating a structure with in put at port with 1 and check its gain, Do the same simulation with input increased to some 5 or 10 and check the results..!!

Regards..!!

 

[gitanjalikalbhor]

assume i have given 10 db input power to an antenna which has a gain of 10db(assume).then the power radiated must be
Prad =10(input power)+10(gain)-1(Losses)=19 db isn't it like this(power is specified in db not in watt)

 

[SpaceDust]

Agreed..!! I used HFSS long back so not sure but u give feed values in units of watts in HFSS. Ya ur Prad is correct, but we are trying to know what is gain here right..!!