Question regarding HFSS and microstrip antenna

some queries regarding hfss and microstrip antenna


--------------------------------------------------------------------------------

i want to ask a few question on hfss which r trobling me

1.what should be the dimensions of the air box that we take..?
should the height start from the infinite ground plane and the length and breadth should be the same as the ground plane or different....plzz tell me about how to take the dimension of this air box and how it affects the results...(( with refrence to microstrip antennas)


2. what should we take the dimension of the waveport
nd which is better rectangular or circular port in case of probe feeding in microstrip antena....


3. what is generally the height of the substrate in microstrip antenna nd for testing which material should we take

4..is it necessary to define the radiation boundary or we can simulate nd get results without it also...nd if yes what should be the dimension of this ?


5.what should be the length of the coaxial cylinder below the ground plane...does it afects the results



6...what adaptive frequency is generaly taken for accurate results?


7.how to define meshing for the airbox...

8. how to define the parameter newline while defining ports....what should be the dimension of it?


plzzz answer to my small question it will be agreat help to me..pllzzz .... these thing r nt clear to me nd i m getting wrong results ..