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

question about loop antenna

Status
Not open for further replies.

wufeng

Junior Member level 1
Joined
Mar 14, 2011
Messages
18
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,396
Hi Guys,
I use HFSS to simulate a loop antenna. But I found out when I reduce the radius of the wire, the input impedance goes up. Does that make sense? I use the lumped port. Thanks
 

eagle5

Member level 3
Joined
May 24, 2011
Messages
55
Helped
29
Reputation
58
Reaction score
28
Trophy points
1,298
Location
Mediterranean
Activity points
1,547
Yes, it makes sense.



In the attached figure you can see the computed input resistance for a circular loop. As the wire radius decreases (Ω increases) the resistance gets higher.

Actually this is the typical behaviour of wire antennas. If you check the resistance of dipole antennas it exhibits the same property.
 

encoder

Member level 3
Joined
Dec 4, 2010
Messages
61
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,288
Activity points
1,599
Yes, it makes sense.



In the attached figure you can see the computed input resistance for a circular loop. As the wire radius decreases (Ω increases) the resistance gets higher.

Actually this is the typical behavior of wire antennas. If you check the resistance of dipole antennas it exhibits the same property.
Nice information about loop antenna thanks for sharing.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top