how to get uwb in small planar antennas

[kartikkhurana]

broadbanding of the antenna

dear all
how from the current distribution we can analyse that
slot has to cut in gnd of coplanar or the feed such that broadbanding is possible with small height of antenna such as 22mm i can achieve wideband 3-10.6 uwb
regards
kartik

 

[kartikkhurana]

about reducing the lower freq of planar uwb antenna

hi all
can u give me some suggestion how can i reduce the lower freq of a 20=length and 18 width of a patch antenna to get uwb lower freq of 3.1 GHz
this forum is very helful
kartik

 

[kartikkhurana]

hi all
i want to get uwb 3.1-10.6 from small sized antennas 25X25
i know it is required to modify the current distribution to make antenna radiate
how can i drop th elower freq to get 3.1GHz for this antenna
kindly tell
regards
kartik

 

[fiwi]

hi all
i want to get uwb 3.1-10.6 from small sized antennas 25X25
i know it is required to modify the current distribution to make antenna radiate
how can i drop th elower freq to get 3.1GHz for this antenna
kindly tell
regards
kartik

,,,kartik,try it...

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[biff44]

basically, you take a non-resonant structure, make it small, and shove a bunch of RF current into it. It will be very inefficient, since the radiation resistance will be bad, BUT it will be UWB.

 

[fiwi]

,,,simpler...

 

[kartikkhurana]

Hi fiwi
Le/We=0.6 or 0,6??
kindly explian
regards
kartik

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HI biff44,
could not understand your explanation

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i want to obtain uwb for antennas less than 25GHz

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sorry less than 25*25 mm2

 

[fiwi]

So must be ...

 

[kartikkhurana]

thanks
I will try this one fiwi
and ask if i had any problem
kartik