US5404119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bandpass filer having parallel-coupled lines
Assignee: Samsung Electronics Co Ltd
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Filing: 1993-05-25
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Granted: 1995-04-04
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Expires: 2013-05-25
Abstract
Abstract A bandpass filter having parallel-coupled lines is disclosed having at least one pair of two-terminal parallel-coupled lines disposed consecutively in a step form, wherein the widths of the pairs of two-terminal parallel couple lines are alternately increased and decreased.
Inventors
- 👤 Jae-won Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:00
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/203; H01P1/20327; H01P1/20354; H01P1/20363
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
154 words
A bandpass filter comprising: an input port; an output port; and a plurality of parallel-coupled lines formed between said input and output ports, each of said parallel-coupled lines being formed of segments of a microstrip line having a first portion with a first width and a second portion with a second width, and first portions of adjacent microstrip lines being coupled to form a parallel-coupled line and second portions of adjacent microstrip lines being coupled to form another parallel coupled-line, wherein said each second width is greater than said each first width such that widths of said microstrip lines forming said plurality of parallel-coupled lines alternately increase and decrease, and wherein said microstrip lines forming each parallel-coupled line are separated by a predetermined distance, and said predetermined distance of said microstrip lines forming each parallel-coupled line decreases from parallel-coupled lines located adjacent to a parallel-coupled line centrally located from said input and output ports.
Claim 2
Dependent Claim
154 words
A bandpass filter comprising: an input port; an output port; and a plurality of parallel-coupled lines formed between said input and output ports, each of said parallel-coupled lines being formed of segments of a microstrip line having a first portion with a first width and a second portion with a second width, and first portions of adjacent microstrip lines being coupled to form a parallel-coupled line and second portions of adjacent microstrip lines being coupled to form another parallel coupled-line, wherein said each second width is greater than said each first width such that widths of said microstrip lines forming said plurality of parallel-coupled lines alternately increase and decrease, and wherein said microstrip lines forming each parallel-coupled line are separated by a predetermined distance, and said predetermined distance of said microstrip lines forming each parallel-coupled line decreases from parallel-coupled lines located adjacent to a parallel-coupled line centrally located from said input and output ports.
Claim 3
Dependent Claim
44 words
The bandpass filter of claim 1, wherein decreases of said predetermined distance are symmetrical between the parallel-coupled lines disposed between said input port and the centrally located parallel-coupled lines and the parallel-coupled lines disposed between said output port and the centrally located parallel-coupled lines.
Claim 4
Dependent Claim
15 words
The bandpass filter of claim 1, wherein said predetermined distance is at least 0.1 mm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-03 | 1998-10-03 | 1999-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-03 | 2002-10-03 | 2003-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-03 | 2006-10-03 | 2007-04-04 | $7700.00 | Window Closed / Lapsed |