slot in patch antenna- compressing scattering parametter S11

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signalfethut

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slot in patch antenna

i don't why addition a slot on patch antenna can compressing scattering parametter S11.
Can you help me explain this problem ?
 

Re: slot in patch antenna

The patch itself provides one resonant point and the slot is another resonant point.
The slot forces current to flow in a different path on the patch and each path of current flow corresponds to a resonant point. So, S11 will change.
 

Re: slot in patch antenna

Slot is generally applied for Broadbanding the response .. all uWB applications have slot ..So u can use slot in microstrip along with cpw feed ....

With little tuning ur S11 will also be gr8
 

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