Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Gain of a symmetrical microstrip patch antenna

Status
Not open for further replies.
K

KRAIG

Member level 1
Member level 1
Joined
Nov 23, 2005
Messages
34
Helped
4
Reputation
8
Reaction score
0
Trophy points
1,286
Activity points
1,536
I try to design a symmetrical microstrip patch array antenna with symmetry in the x and y axis.The problem is the simulation results for all my different tries (50) produce a main lobe(Theta =0 ,Phi =0) gain of -198db.

Now,the reason i originally decided to create this structure is because i thought that having a symmetrical patch array antenna results in the main lobe(theta =0,Phi =0) being always bigger than the secondary lobes.

The procedure i follow is desing a 4x4 array with some patches on and some off and then create the symmetry to the x,y axis.

My question is if i am missing something here and how can i proceed to the desing of this structure.
 

Hello,

but have you a deep null instead of the peak, or you have -198 dB every where ?

in the first case you are providing excitatins out of phase (or by 0° 180° in the excitaation or kept 0° for all the batch but rotation them mechanically of 180), in the second case or you ahve not fed at all the patches or you have an exagerated mismatch !

Anyway provida us a bitmap of array with feeding points end the excitations to help you better.

bye.
 

    K

    KRAIG

    Points: 2
    Helpful Answer Positive Rating
You were right.

I was providing wrong excitations.Due to the symmetry the excitations were also mirrored to another point in the patches.

thanks
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top