Patent EP0844684A1 successfully refreshed from Google Patents.
EP0844684A1
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Unbalanced-to-balanced converter
Assignee: Murata Manufacturing Co Ltd
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Filing: 1997-11-25
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Granted: —
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Expires: 2017-11-25
Abstract
Abstract An unbalanced-to-balanced converter (10) (balun) comprises three distributed-constant lines (1, 2, 3). In one distributed-constant line (1), a standing wave is generated. Disposed adjacent thereto is another distributed-constant line (2) to which the power of the standing wave is transferred. A signal input to the unbalanced-to-balanced converter is divided into two signals having phases 180 degrees apart and the same level.
Inventors
- 👤 Hiroaki Tanaka
- 👤 Yutaka Sasaki
- 👤 Takuya Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 03:00
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/08; H01P5/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
144 words
An unbalanced-to-balanced converter (10) for use at a
given wavelength, comprising: first, second, and third distributed-constant lines (1,
2, 3) disposed in this order and arranged for being
electromagnetically coupled with each other; said first, second, and third distributed-constant lines
(1, 2, 3) having coupling sections whose length is
substantially one fourth of said given wavelength; and
a first end of said first distributed-constant line (1)
being an input terminal (4), said first end of said
first distributed-constant line (1) being connected to a first
end of said second distributed-constant line (2), a
second end of said second distributed-constant line (2)
and a first end of said third distributed-constant line
(3) being grounded, a second end of said first
distributed-constant line (1) being a first output
terminal (5), and a second end of said third
distributed-constant line (3) being a second output
terminal (6).
Claim 2
Dependent Claim
29 words
A converter (10) as in claim 1, wherein said first,
second and third distributed-constant lines (1, 2, 3)
are disposed substantially parallel with each other on a
dielectric substrate.
Claim 3
Dependent Claim
23 words
A converter (10) as in claim 2, wherein said first,
second and third distributed-constant lines (1, 2, 3)
are constituted by respective microstriplines.
Claim 4
Dependent Claim
23 words
A converter (10) as in claim 2, wherein said first,
second and third distributed-constant lines (1, 2, 3)
are constituted by respective striplines.
Claim 5
Dependent Claim
60 words
A converter (10) as in claim 1, wherein said first,
second and third distributed-constant lines (1, 2, 3)
are disposed so that in response to an input signal
received at said input terminal (4), a pair of output
signals appear at said first and second output terminals
(5, 6) having phases substantially 180° apart and having
substantially the same level.
Claim 6
Dependent Claim
22 words
A converter (10) as in claim 5, wherein each of said
output signals has substantially half the power of said
input signal.
Claim 7
Dependent Claim
24 words
A converter (10) as in claim 5, wherein said first,
second and third distributed-constant lines (1, 2, 3)
are at least 10 µm apart.
Claim 8
Dependent Claim
23 words
A converter as in claim 2, wherein said first, second
and third distributed-constant lines (1, 2, 3) are at
least 10 µm apart.
Claim 9
Dependent Claim
23 words
A converter as in claim 1, wherein said first, second
and third distributed-constant lines (1, 2, 3) are at
least 10 µm apart.
References Cited (Backward Citations)
US4739289A
Cited
JPH02184104A
Cited
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