Ultrawide Band Antenna and Filter Design
Ultrawide Band Antenna and Filter Design
Ultrawide Band Antenna and Filter Design
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Variety <strong>and</strong> principle of ultra wide b<strong>and</strong> antenna<br />
log-periodic dipole array antenna<br />
21<br />
L1<br />
α<br />
Feed line<br />
(feed with phase inversion)<br />
L2<br />
Approximately L1 decide minimum limit<br />
of resonance frequency. And L2 decide<br />
Guided wave area<br />
maximum limit of resonance frequency.<br />
Radiation area Example of design:α=10°、L1=63.5mm<br />
element number=15、L2=31.8mm<br />
Reflection area<br />
Each working area moves over<br />
by changing of frequency.<br />
b<strong>and</strong>width→1.1GHz~1.9GHz(less than VSWR2)<br />
gain →+8~+11dBi(Peak)<br />
2005/11/3