EP1218962A1 - Symmetrierglied - Google Patents
SymmetriergliedInfo
- Publication number
- EP1218962A1 EP1218962A1 EP00960914A EP00960914A EP1218962A1 EP 1218962 A1 EP1218962 A1 EP 1218962A1 EP 00960914 A EP00960914 A EP 00960914A EP 00960914 A EP00960914 A EP 00960914A EP 1218962 A1 EP1218962 A1 EP 1218962A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- line
- lines
- balun
- gate
- ground
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 6
- 239000000758 substrate Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 241000726409 Satellites Species 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
- H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced lines or devices with unbalanced lines or devices
Definitions
- the present invention relates to a balun consisting of planar lines coupled to one another, one end of a first line running between a second and a third line serving as an unbalanced signal input and the other end of this first line being connected to ground and one end of the other both lines form a symmetrical signal input.
- Transmission lines One speaks of a symmetrical line if the signal transmitted over it does not have the ground as reference potential. In contrast, an asymmetrical transmission line is contacted on one side with ground, so that a signal transmitted over it
- Symmetry members of this type are e.g. at the entrances and exits of
- Double-balanced mixers or amplifiers or modulators etc. are used.
- a balun consisting of three coupled planar lines is known, for example, from J. Villemazet, J. Dubouloy, M. Soulard, J. Cayrou, E. Husse, B. Cogo, J. Cazaux: New Compact Double Balanced Monolithic Down-Converter Application to a Single Chip MMIC Receiver for Sattelite Equipment, IEEE MTT-S Digest , 1998, pages 853-856.
- At one end of the middle of the three lines there is an asymmetrical gate. The other end of the middle line is connected to ground.
- Vias must be provided that take up a relatively large amount of space on the substrate. So that the inputs of the balun for DC voltage are not short-circuited to ground, capacitances would have to be inserted at all inputs for DC voltage decoupling.
- the invention has for its object to provide a balun of the type mentioned, in which a DC voltage decoupling is realized with the simplest possible means.
- the capacitive coupling of the line ends can be realized in a very simple manner either by connecting the ends of the second and third lines to line sections which run next to one another over a predeterminable length or by the ends the second and third lines are connected to one another via one or more capacitors. It is advisable to connect a capacitance in series with the third line. This capacitance improves the symmetry between the symmetrical gates. It is used to adjust the phase difference to 180 °.
- FIG. 1 shows a balun in which two lines are capacitively coupled to one another by parallel routing
- FIG. 2 shows a balun, wherein two lines are coupled to one another via concentrated capacitances.
- the balun shown in Figure 1 consists of three side by side and coupled with it planar lines 1, 2 and 3.
- the coupling length of these three lines corresponds to approximately a quarter of the average operating wavelength of the balun.
- the first line 1, which runs between the other two lines 2 and 3, is connected to ground at one end.
- a via 4 to the ground surface on the underside of the substrate is provided in the substrate on which the lines are applied.
- the opposite end of this first line 1 forms an asymmetrical gate 5.
- the end of the second line 2 adjacent to this asymmetrical gate 5 is a first gate for symmetrical signals and the second gate 7 for symmetrical signals is located at the end of the third line 3, the the ground connection of the first line 1 is adjacent.
- the connection between the ground-contacted end of the first line 1 to the via 4 is made via an air bridge 8, which crosses the end of the third line 3 without contact.
- the ends of the second line 2 and the third line 3 opposite the gates 6 and 7 are each connected to a line section 9, 10.
- the line sections 9 and 10, which start at opposite ends of the two lines 2 and 3, are led back to the center of the balancing member in a space-saving manner and run alongside one another over a predetermined length, with the three lines 1, 2, 3 being provided via air bridges 11 and 12 cross contact-free.
- the coupling length of the two line sections 9 and 10 is selected so that a desired capacitive coupling between the ends of the two lines 2 and 3 is created. This capacitive coupling of the two lines 2 and 3 causes the balun to be DC decoupled.
- a capacitance C1 is in series with the third line 3 in the area of the gate 7 connected. This capacitance C1 improves the symmetry between the symmetrical gates 6 and 7. It is used to adjust the phase difference between the two gates 6 and 7 to 180 °.
- FIG. 2 shows a balun, which in principle has the same structure as the balun in FIG. 1 and therefore also has the same reference numerals.
- the exemplary embodiments of a balun shown in FIGS. 1 and 2 differ in the type of capacitive coupling between the ends of the two lines 2 and 3. While according to the exemplary embodiment in FIG. 1, the capacitive coupling takes place by a line coupling between line sections 9 and 10, 2, the two line sections 9 and 10 are connected to one another via two capacitors C2 and C3 designed as concentrated components.
- the two capacitors C2 and C3 connected to the ends of the line sections 9 and 10, which are arranged on both sides of the coupled lines 1, 2 and 3, are via an air bridge 13 which crosses the three lines 1, 2 and 3 without contact. connected with each other. Instead of two capacitors, only one capacitor can be inserted between line sections 9 and 10.
Landscapes
- Coils Or Transformers For Communication (AREA)
- Microwave Amplifiers (AREA)
- Interface Circuits In Exchanges (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Liquid Developers In Electrophotography (AREA)
- Liquid Crystal Substances (AREA)
- Steroid Compounds (AREA)
- Near-Field Transmission Systems (AREA)
- Electric Cable Installation (AREA)
- Communication Cables (AREA)
- Dc Digital Transmission (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Carbon And Carbon Compounds (AREA)
- Paper (AREA)
- Sorption Type Refrigeration Machines (AREA)
- Amplifiers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19943954 | 1999-09-14 | ||
| DE19943954 | 1999-09-14 | ||
| PCT/IB2000/001371 WO2001020709A1 (de) | 1999-09-14 | 2000-09-12 | Symmetrierglied |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1218962A1 true EP1218962A1 (de) | 2002-07-03 |
| EP1218962B1 EP1218962B1 (de) | 2005-11-09 |
Family
ID=7921941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00960914A Expired - Lifetime EP1218962B1 (de) | 1999-09-14 | 2000-09-12 | Symmetrierglied |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6809610B1 (de) |
| EP (1) | EP1218962B1 (de) |
| CN (1) | CN1206768C (de) |
| AT (1) | ATE309623T1 (de) |
| AU (1) | AU7306800A (de) |
| DE (1) | DE50011583D1 (de) |
| NO (1) | NO20021285L (de) |
| WO (1) | WO2001020709A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201228090A (en) * | 2010-12-31 | 2012-07-01 | Ind Tech Res Inst | Input apparatus on chip for differential signals and balun thereof |
| CN107356265B (zh) * | 2017-07-10 | 2020-06-16 | 哈尔滨工业大学 | 一种基于陀螺飞轮力矩线圈电流的偶不平衡量辨识方法 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59148405A (ja) | 1983-02-14 | 1984-08-25 | Matsushita Electric Ind Co Ltd | 平衡不平衡変換器 |
| JPH10163715A (ja) | 1996-11-26 | 1998-06-19 | Murata Mfg Co Ltd | 不平衡−平衡変換器 |
| FI103614B1 (fi) * | 1997-03-20 | 1999-07-30 | Nokia Mobile Phones Ltd | Vaiheistus- ja balansointielin |
| US5886589A (en) * | 1997-05-30 | 1999-03-23 | Analog Devices, Incorporated | Balanced to unbalanced transmission line transformers |
| SE513470C2 (sv) * | 1999-07-08 | 2000-09-18 | Ericsson Telefon Ab L M | Balunkrets |
-
2000
- 2000-09-12 DE DE50011583T patent/DE50011583D1/de not_active Expired - Lifetime
- 2000-09-12 WO PCT/IB2000/001371 patent/WO2001020709A1/de not_active Ceased
- 2000-09-12 AT AT00960914T patent/ATE309623T1/de not_active IP Right Cessation
- 2000-09-12 US US10/088,368 patent/US6809610B1/en not_active Expired - Lifetime
- 2000-09-12 CN CN00815664.6A patent/CN1206768C/zh not_active Expired - Fee Related
- 2000-09-12 EP EP00960914A patent/EP1218962B1/de not_active Expired - Lifetime
- 2000-09-12 AU AU73068/00A patent/AU7306800A/en not_active Abandoned
-
2002
- 2002-03-14 NO NO20021285A patent/NO20021285L/no not_active Application Discontinuation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0120709A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1218962B1 (de) | 2005-11-09 |
| NO20021285D0 (no) | 2002-03-14 |
| CN1206768C (zh) | 2005-06-15 |
| US6809610B1 (en) | 2004-10-26 |
| CN1390369A (zh) | 2003-01-08 |
| AU7306800A (en) | 2001-04-17 |
| DE50011583D1 (de) | 2005-12-15 |
| NO20021285L (no) | 2002-05-14 |
| ATE309623T1 (de) | 2005-11-15 |
| WO2001020709A1 (de) | 2001-03-22 |
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