INSERT SLOTS ON THE GROUND PLANE USING ADS

hi

I am trying to design a microstrip slot antenna. Their is method to reduce the size of the antenna by inserting slots to the ground plane. Does anyone know how can this be achieved using Advanced Design System by HP?

thanks in advance

Bobby

Just some comments:

Slots in the ground plane of microstrip devices is well known as an EBG structure (Radisic EBG structure). It can be used for reducing radiating element size if well designed. Slow-wave effect in the EBG structure pass-band can be used for such applications.

For slot line printed devices, I recomend another structure :
The dual one of the Radisic Structure consists in adding metallic discs under the slot on the other side of the dielectric substrate.
Then miniaturisation applications have been proposed on annular slot antennas. (see ieee ap-s 2003 article)

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Littlindian

U can watch Wong′s book for slotted printed antennas.. not necessary ground slots are considered to reduce the size of the antenna.

Anyway be careful of back radiation...

Hope it helps

Lupin

Define a different stackup, with two metal layers instead of one and a open boundary condition at the bottom. So instead of this stackup:

Open boundary
Air
Metal 1
Dielectric
Closed boundary (ground plane)

you make this one

Open boundary
Air
Metal 1
Dielectric
Metal 2
Air
Open boundary

Now the ground plane (metal 2) can be edited. But be sure that the size is big enough for accurate EM simulation!

Which Boisbouvier paper do u mean?