cpw feed slot antennas port assignment in hfss

hi friend i am veeramani i am doing my research on cpw feed antennas
and now i am working on cpw feed slot antenna. i am confused about
slot antennas feed by cpw because how the antenna resonating elements
contact with ground plane. if it is contact there is no difference
between the signal and ground .

my another question is how to give feed in hfss. (slot diple fed by
cpw this was my research topic).

Hi veeramaniv,

What is your first question?

To answer your second question, use a waveport as described in the HFSS tutorials or at http://www.emtalk.com/tut_1.htm.

cpw there are two ground planes which was seperated by signal trace so while there is the difference in signal and ground connection and there is seperation also but in the case of cpw feed slot antennas ground and signal are connected. my doubt is how it works and its functions . and i need basics for understand that.

u posted the emtalk not giving answers abt wht i am searching. i need cpw feed slot antennas feed methods in hfss. thanks and i am waiting for ur answers..

Hi veeramaniv,

The method for exciting the CPW mode is virtually the same as for a MS mode. Just make sure the waveport appropriately covers the conductors.