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.

Return loss of Dual Frequency Antenna

Status
Not open for further replies.

arxlan

Member level 3
Joined
Oct 28, 2011
Messages
67
Helped
14
Reputation
28
Reaction score
14
Trophy points
1,288
Activity points
1,690
can anyone tell me why the return loss for first resonance is high as compared to the return loss for second resonance?
 

mkonca

Full Member level 1
Joined
Apr 25, 2010
Messages
97
Helped
23
Reputation
46
Reaction score
23
Trophy points
1,288
Location
Cyprus
Activity points
1,796
The first thing that comes to my mind is higher losses at higher frequencies. So you get a lower S11.
 

Abhishekabs

Advanced Member level 3
Joined
Jan 12, 2007
Messages
758
Helped
116
Reputation
232
Reaction score
45
Trophy points
1,308
Location
India
Activity points
5,537
It depends on your design, your circuit is tuned for first resonance that is why you see big dip in S11.
You can make your circuit more tuned @ 2nd resonance also.
I can tell this because my resonating structure was by mistake got tuned to 2nd resonance.
 
  • Like
Reactions: arxlan

    arxlan

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top