Ultrawide Band Antenna and Filter Design
Ultrawide Band Antenna and Filter Design
Ultrawide Band Antenna and Filter Design
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Variety <strong>and</strong> principle of ultra wide b<strong>and</strong> antenna discone antenna<br />
A<br />
22<br />
B<br />
Φ<br />
D<br />
disc<br />
conical<br />
feed line<br />
As thicken conductor diameter of dipole antenna,<br />
input impedance of antenna is improved.<br />
Widen b<strong>and</strong>width<br />
One part of dipole antenna is disc<br />
<strong>and</strong> the other parts are conical in shape.<br />
It feeds with coaxial cable.<br />
Example of design<br />
Minimum usage frequency fc=200MHz<br />
when D=230mm<br />
A=310mm<br />
B=350mm<br />
VSWR is less than 1.5 at 200~1000MHz<br />
2005/11/3
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