Microstrip Patch with Shorting-pin Example

Does anyone have an example (preferably HFSS) of a Microstrip Patch Antenna with Shorting Pin at 2.4 GHz?

Any help will be greatly appreciated.

Hi,
Can anyone please check this example. I'm trying to optimize for 2.4 GHz. I have an inset feed.

I'm getting a good VSWR and Return Loss at 2.4 GHz. However, the Gain from the antenna is extremely low.

Can you recommend any changes to improve the gain of this patch antenna.

Thanks,