HFSS - PCB Antenna Design

[cjrathi]

Hi,

I am designing a 2.4GHz PCB antenna (F-type). Snap attached. This design is already verified at 2.4GHz, since i have seen it in one paper.

I want to design similar kind of antenna for 2.4GHz and 5Ghz band, but before starting that I want to simulate existing designed and proven antenna and verify that my HFSS set up is correct.

I have few queries:-

1. What type of excitation I should give at feed? How should I give it? Should it be vertical from substrate bottom to feed entry point? Or there is some other technique to do that?

2. How should I connect patch to ground ? Shall I put gnd plane on top as well as bottom ? How to connect top and bottom plane to each other?

3. What should be other basic settings like Solution type?

4. Shall I take patch/gnd plane as sheet and then assign it as perfect E, or I make patch as a box of small height and assign it as PEC material?

Could any body help me in this?

Thanks,
Chaitanya

 

[PlanarMetamaterials]

I don't know anything about PIFA antennas, but to try to answer your questions:

1) I usually use lumped ports.

2) Just bottom, I would think.

3) Max ~20 passes, deltaS = 0.01.

4) Depends on how accurate you want. I typically go with volumetric structures and assign it a material of copper.

Good Luck

 

[cjrathi]

Hello PlanarMetamaterials,

Thanks for your reply.

If I keep gnd plane just on bottom, how would I connect the patch gnd to bottom gnd.??

For assigning lumped port as feed, should I take it from substrate to feed entry point on top???

Thanks,
Chaitanya

 

[Kick]

I am using CIS STUDIO SUITE software for Antenna simulation.

Never add ground plane on top and bottom of the antenna. Antenna area should be free from Ground, Text, Metal etc...

 

[PlanarMetamaterials]

Hello PlanarMetamaterials,

Thanks for your reply.

If I keep gnd plane just on bottom, how would I connect the patch gnd to bottom gnd.??

For assigning lumped port as feed, should I take it from substrate to feed entry point on top???

Thanks,
Chaitanya

I may have misunderstood your setup, can you post some images taken from different angles. What are you referring to when you say "patch"?

 

[cjrathi]

Attaching the snap., where highlighted area is what i am considring as patch