RioPifa
Newbie level 5
Hello guys
i have a problem with measuring the Bandwidth of a dual band PIFA antenna.
lets look at the following S Parameter figure ,, we see that the lowest magnitude is -7.9dB
![sP1.jpg sP1.jpg](https://www.edaboard.com/data/attachments/27/27434-a8a8bf68ec2d66d06381125f5c3d9bb8.jpg)
so How do i measure it ,, do i subtract -3dB from the loweset value and take -4.3dB as upper and lower cut off frequencies like showing in the following figure
![sP2.png sP2.png](https://www.edaboard.com/data/attachments/27/27433-8b2fe434c306fa75cb3965ad612f7c0c.jpg)
i hope u can answer my question and sorry for being long
Regardz
Rio
i have a problem with measuring the Bandwidth of a dual band PIFA antenna.
lets look at the following S Parameter figure ,, we see that the lowest magnitude is -7.9dB
![sP1.jpg sP1.jpg](https://www.edaboard.com/data/attachments/27/27434-a8a8bf68ec2d66d06381125f5c3d9bb8.jpg)
so How do i measure it ,, do i subtract -3dB from the loweset value and take -4.3dB as upper and lower cut off frequencies like showing in the following figure
![sP2.png sP2.png](https://www.edaboard.com/data/attachments/27/27433-8b2fe434c306fa75cb3965ad612f7c0c.jpg)
i hope u can answer my question and sorry for being long
Regardz
Rio