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2*1 patch array - how to design the feed network ?
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leaps



Joined: 10 Jul 2008
Posts: 47
Helped: 1
Post01 Jul 2009 10:36   

Re: 2*1 patch array
i am simulating a 2*1 patch array but in my results i am seeing a lot of harmonics the patch's are designed to resonate at 10 GHz can anyone plz look into this design and help me solve my problam

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here the hfss file

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leaps



Joined: 10 Jul 2008
Posts: 47
Helped: 1
Post01 Jul 2009 22:59   

Re: 2*1 patch array
i have designed the feed network seprately can any one please guide me how to design the feed network effectly on hfss and what paramters to improve and optimum vlaues urgently
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shameemkabir



Joined: 31 Oct 2007
Posts: 389
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Location: Germany
Post02 Jul 2009 12:48   

Re: 2*1 patch array
does your single patch antenna work as expected?
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leaps



Joined: 10 Jul 2008
Posts: 47
Helped: 1
Post02 Jul 2009 18:08   

Re: 2*1 patch array
yes it does i have s11 at -21db and vswr 1.12
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shameemkabir



Joined: 31 Oct 2007
Posts: 389
Helped: 113
Location: Germany
Post03 Jul 2009 10:57   

Re: 2*1 patch array
I simulated one patch from your uploaded file. However, it does not have the characteristics you told (10 GHz resonance, S11 at -21db and vswr 1.12).

would you please upload your single patch?
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leaps



Joined: 10 Jul 2008
Posts: 47
Helped: 1
Post03 Jul 2009 18:18   

Re: 2*1 patch array
sory i just checked my uploaded file again it had been changed since i was chaing parameters to fru to figure out where i was going wrong in this attachment i have uploaded both array and single patch

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leaps



Joined: 10 Jul 2008
Posts: 47
Helped: 1
Post05 Jul 2009 14:33   

Re: 2*1 patch array
can anyone please sugest anything on patch array :S
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shameemkabir



Joined: 31 Oct 2007
Posts: 389
Helped: 113
Location: Germany
Post06 Jul 2009 9:51   

Re: 2*1 patch array
The single patch simulation does not give a useable design at 10 GHz. this is the return loss what I have found. Is it the same what you have got?

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leaps



Joined: 10 Jul 2008
Posts: 47
Helped: 1
Post06 Jul 2009 11:58   

Re: 2*1 patch array
these are my simulation results

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leaps



Joined: 10 Jul 2008
Posts: 47
Helped: 1
Post09 Jul 2009 13:50   

Re: 2*1 patch array
what should be the distance between the patches i have read it should be 0.5*lamda to 0.8 lamda also i read it should be no greater than 8* substrate height how can i find optimum distance
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