Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic 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

Very low efficiency patch antenna

Status
Not open for further replies.

Salving

Member level 1
Joined
Mar 31, 2012
Messages
35
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Activity points
1,515
Hello everybody, need help with next problem.
I'm designing patch antenna, freq - 2.6 GHz, using cst mws. The substrate is FR4. The problem is low efficiency i get, about 30%. I thought it was due to losses in substrate, but when i changed tg delta to zero, the efficiency stayed the same. Can anybody tell me how to solve this issue?
 

flanello

Advanced Member level 1
Joined
Jan 9, 2008
Messages
435
Helped
91
Reputation
182
Reaction score
81
Trophy points
1,308
Activity points
3,491
Can you provide more information of your antenna? For example the size or the height an perhaps a picture with your antenna feed.
 

Salving

Member level 1
Joined
Mar 31, 2012
Messages
35
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Activity points
1,515
I tried aperture-coupled, coax, microstrip line feeds and various heights of substrate but i couldn't get high efficiency.
 

flanello

Advanced Member level 1
Joined
Jan 9, 2008
Messages
435
Helped
91
Reputation
182
Reaction score
81
Trophy points
1,308
Activity points
3,491
Is the ground plane large enough?
You can also try to increase the mesh or use the adaptive sweeps.
And what do you mean with efficiency? The efficiency only of the antenna or the total efficiency of the antenna and the matching? E.g. what is your gain and your S11?
 

Salving

Member level 1
Joined
Mar 31, 2012
Messages
35
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Activity points
1,515
Is the ground plane large enough?
You can also try to increase the mesh or use the adaptive sweeps.
And what do you mean with efficiency? The efficiency only of the antenna or the total efficiency of the antenna and the matching? E.g. what is your gain and your S11?
No, matching losses arу not taken into account. Gain is about 2.5 dBi and return losses are very small(about -25 dB). But i get good efficiency with rogers substrate, but bandwidth is 1.45% so i'm no longer interested in patches for my frequency
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top