[SOLVED] reduction of back lobe in patch antenna array

[nitish77]

Hi,iam doing a project on rectangular patch antenna array(4 elements)

operating freqeuncy=2.4ghz
substrate is FR4 dielectic constant =4.4
height=1.5mm
lamda=60mm
distance between each patch=lamda/2=30mm
T-junction power divider is being used.

simulation is done in hfss

for 2 array,gain=5.5db and directivity=9db at 2.4ghz

I need some method to reduce the back lobe.

 

[jiripolivka]

View attachment 84473 Hi,iam doing a project on rectangular patch antenna array(4 elements)

operating freqeuncy=2.4ghz
substrate is FR4 dielectic constant =4.4
height=1.5mm
lamda=60mm
distance between each patch=lamda/2=30mm
T-junction power divider is being used.

simulation is done in hfss

for 2 array,gain=5.5db and directivity=9db at 2.4ghz

I need some method to reduce the back lobe.

Why don't you try to use a reflector?

 

[nitish77]

Why don't you try to use a reflector?

which type of reflector to be used and how to implement it in hfss?
Is it a simpler method?

 

[jiripolivka]

which type of reflector to be used and how to implement it in hfss?
Is it a simpler method?

I do not use hfss or modeling. I prefer making and testing antennas. Try the same.

BTW, if you "work on antennas", I assume you have an idea how a reflector looks.

 

[volker_muehlhaus]

Why don't you try to use a reflector?

Reflector? The patch antenna does have some back side metalization anyway, so that's more or less the reflector. Maybe the back side metalization is too small.

 

[ravindran]

I do not use hfss or modeling. I prefer making and testing antennas. Try the same.

BTW, if you "work on antennas", I assume you have an idea how a reflector looks.

what type of feed are u using? Ensure that the feed is impedance matched

 

[jus4asearch]

use PBG structure on ground plane

 

[burton]

increase the size of ground