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

[leaps]

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

Added after 50 seconds:

here the hfss file

 

[leaps]

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

 

[shameemkabir]

Re: 2*1 patch array

does your single patch antenna work as expected?

 

[leaps]

Re: 2*1 patch array

yes it does i have s11 at -21db and vswr 1.12

 

[shameemkabir]

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?

 

[leaps]

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

 

[leaps]

Re: 2*1 patch array

can anyone please sugest anything on patch array :S

 

[shameemkabir]

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?

 

[leaps]

Re: 2*1 patch array

these are my simulation results

 

[leaps]

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