Need help in fabricating mushroom-like EBG structure

[leeyana]

hello friends..
I'm having difficulties here where i dont have any idea to fabricate vias of mushroom EBG... i've found a solution using bail-bars but unfortunately its hard to find it in my country. so i hope u guys can provide me some solution. thank u very much. i really appreciate ur respon.

 

[thylacine1975]

What's a bail-bar? I haven't heard the term before..?

For the mushroom EBGs I've been making I've found regular plated-through-hole PCB techniques/manufacturing has worked fine. I'm not sure what special thing you might be doing or needing though? I've been designing EBGs with PCB substrates (I've used Rogers 4003, PTFE-loaded dielectrics and even good old FR-4) of varying thicknesses and just using conventional (and cheap) double sided PCB manufacturers to build my prototypes.

The bottom layer is a solid plane of copper, the top layer contains my repeated pattern of "mushroom heads", with plated through [drilled] vias linking the two sides. At ~$2 for a 100mmx100mm FR-4 PCB from China (e.g. http://imall.iteadstudio.com/open-pcb/pcb-prototyping/im120418003.html), prototyping (can be) reasonably inexpensive!

 

[leeyana]

Hai thylacine1975. Tq for d respon. Im designing mushroom ebg structure. Im done with simulation process using cst. Now im try to fabricate it. I already drilling holes to insert d via. And i know little bit about through hole via. The problem is, i cant find any ready made via in d market here. I hope there are DIY idea to make the vias. By d way, my ebg is using fr4 board with 1.6mm thickness and bottom layer has solid copper ground plane.