Ultrawide Band Antenna and Filter Design
Ultrawide Band Antenna and Filter Design
Ultrawide Band Antenna and Filter Design
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Evaluation of antenna characteristics<br />
gain <strong>and</strong> radiation pattern<br />
27<br />
St<strong>and</strong>ard antenna<br />
e.g. St<strong>and</strong>ard dipole antenna<br />
Prs(dBm)<br />
Gs(dBi)<br />
Pt(dBm)<br />
Anechoic chamber<br />
Transmitting antenna<br />
e.g. Double ridge horn antenna Measured antenna Transmitting antenna<br />
e.g. Double ridge horn antenna<br />
Prt(dBm)<br />
Gain Gt=Prt-Prs+Gs<br />
rotate measurementΦ=270°<br />
antenna <strong>and</strong> plot Gt<br />
Radiation pattern<br />
Gt(dBi)<br />
rotation φ<br />
Φ=0°<br />
Φ=180°<br />
Gain(dBi)<br />
Pt(dBm)<br />
Φ=90°<br />
2005/11/3
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