![](https://csdnimg.cn/release/download_crawler_static/88325752/bg9.jpg)
Impedance Response of Dipole
Dipole
Antennas
Half-wave dipole @ 1 GHz
78 mm
78 mm
• Resonance: X
in
= 0 for odd
multiples of the half wavelength
• Anti-resonance: X
in
= 0 for even
multiples of the half wavelength
• Usually, the antenna radiates
using the fundamental mode
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
Impedance (ohm)
Frequency (GHz)
Input resistance
Input reactance
9