Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Reexamination Certificate
2006-09-01
2009-11-10
Cho, James H. (Department: 2819)
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
C333S185000
Reexamination Certificate
active
07616080
ABSTRACT:
A bandpass filter (BPF) configured in 3-D structures for filtering signals of ultra wide bands is disclosed, the BPF comprising sequentially stacked first to fourth dielectric substrates, wherein the first dielectric substrate is formed at a bottom surface thereof with a first ground pattern, the second dielectric substrate is formed at an upper surface thereof with a second ground pattern, and a stripline pattern is formed between the first and second dielectric substrates. The fourth dielectric substrate is formed thereon with a filter pattern and input/output coupled line patterns.
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Kang Nam-kee
Kim Dongsu
Lee Woo-sung
Park Jong-chul
Yoo Chan-sei
Cho James H.
Craig Royal W.
Hammond Crystal L
Korea Electronics Technology Institute
Ober / Kaler
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