EP0993066B1 - Mikrowellenkoppler für monolitisch integrierten Schaltkreis - Google Patents
Mikrowellenkoppler für monolitisch integrierten Schaltkreis Download PDFInfo
- Publication number
- EP0993066B1 EP0993066B1 EP99402421A EP99402421A EP0993066B1 EP 0993066 B1 EP0993066 B1 EP 0993066B1 EP 99402421 A EP99402421 A EP 99402421A EP 99402421 A EP99402421 A EP 99402421A EP 0993066 B1 EP0993066 B1 EP 0993066B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coplanar
- coupler
- inlet
- elements
- transistors
- 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.)
- Expired - Lifetime
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- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 239000000543 intermediate Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
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
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
-
- 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 invention relates to a coplanar microwave coupler and more particularly a coplanar microwave coupler, active and balanced, intended for be incorporated into a monolithic integrated circuit, called MMIC (Monolithic microwave integrated circuit).
- MMIC Monolithic microwave integrated circuit
- Active microwave couplers of the combiner or divider type, incorporated in monolithic integrated circuits made in MMIC technology had the disadvantage of being relatively bulky and delicate integration.
- LUFET Line-Unified Field-Effect Transistors
- Such couplers are notably described in the document entitled “Divider and Combiner Line-Unified FET's as basic circuit function modules "published in September 1990 by T. TOKUMITSU & al, in pages 1210-1226 from volume 38, n ° 9 of IEEE MTT.
- Unified access for transistors makes it possible to take advantage of the slots formed by the metal strips constituting the electrodes of these transistors. It is thus possible to reduce the dimensions and the complexity of producing a coupler. This also increases the frequency bandwidth of circuits integrated monoliths thus produced. However the electrical performances obtained, particularly in terms of integration gain, remain limited. In addition, it is not always possible to directly integrate such a coupler in a balanced circuit more complete and, for example, as a 180 ° combiner in a balanced mixer, because such a combiner requires floating input and output access referenced to the mass, which the envisaged coupler does not allow.
- the invention therefore provides a coplanar microwave coupler, active and balanced for monolithic integrated circuit MMIC, comprising FET transistors with metal gate, source and drain electrodes integrated into planar metallic elements combined to form the entrance and outlet of the coupler, characterized in that all of these accesses consist of an association comprising one or more lines with CPS coplanar ribbons and one or more CPW coplanar waveguides, and that the number of input ports is different from the number of exit ports.
- the coupler comprises a common floating central electrode obtained by the use of ribbon lines CPS coplanar in the access set.
- the coupler comprises two input accesses which are composed by two coplanar waveguides acting each on a half of the coupler transistors under the action of signals excited in phase opposition and an exit access which is composed by a ribbon line CPS coplanar connected to a T-junction at which the signals intermediates from the transistors are recombined in phase.
- the coupler of the divider type, has a floating input obtained by adding a CPS / CPW transition.
- the coupler of the combiner type, has a floating entrance obtained by adding a ribbon line CPS coplanar upstream of a CPS / CPW transition of the coupler input.
- the coupler comprises a number of transistors attacked via an input access which is equal to two or one multiple of two, all transistors comprising either one or alternately two grid fingers, which improves electrical performance in terms of concerns the power gain.
- the invention relates to monolithic integrated circuits comprising a coupler having at least one of the characteristics mentioned above.
- the invention, its characteristics and advantages are specified in the description which follows in link with the figures mentioned below.
- Figure 1 shows a representative diagram of mask elements main for a combiner according to the invention.
- Figure 2 shows a representative diagram of mask elements main for a divider according to the invention.
- Figure 3 shows a representative diagram of mask elements main for a variant combiner according to the invention.
- FIG. 4 shows a diagram representing the main mask elements for a combiner, according to FIG. 3, provided with output access lines of a mixer.
- the invention relates to a microwave coupler, active, balanced and of the coplanar type, more particularly intended to be incorporated in a monolithic integrated circuit MMIC.
- a known example of such a circuit relating to a LUFET combiner with a common grid is illustrated in FIG. 5a of the document cited above. This circuit will not be detailed here insofar as it is not the subject of the invention.
- the active and balanced coupler, of the LUFET type, according to the invention comprises access lines of the coplanar ribbon type CPS (Coplanar strips) associated with coplanar waveguides CPW (Coplanar Waveguides) more particularly in the context of 'an MMIC circuit.
- CPS Coplanar strips
- CPW Coplanar Waveguides
- a CPS line comprises two metal strips of fixed width W which are separated by a fixed width S slot and it works practically according to a propagation mode exploiting the properties of waves electromagnetic transverse TEM, unlike a conventional slotted line which operates according to a propagation mode exploiting the properties of waves transverse electrical TE.
- a compromise is made regarding the width W which must be greater for the line losses to be minimal and which must also be low enough to eliminate the risk of phenomena non-TEM interference and to minimize the area at the circuit integrated monolithic MMIC. This is developed in particular in the document entitled "CPS structure potentialities for MMICS: a CPS / CPW transition and a bias network" published in 1998 by D. PRIETO & al, in pages 111 to 114 of IEEE MIT-S Digest.
- the width Wm of the CPW ground planes can be reduced to a value less than half the distance between ground planes without the propagation characteristics are not adversely affected.
- the balanced active coupler 1 shown diagrammatically in FIG. 1, can for example be produced on a surface of 330 ⁇ 240 ⁇ m 2 .
- This coupler is a 180 ° power combiner, it includes FET transistors. Only the metal bands for access to the gate G, drain D and source S electrodes are shown, these bands usually being located above the transistors to which they are assigned in the structure constituting the MMIC circuit.
- the coupler has four FET transistors with a gate finger 2 or two FET transistors with two gate fingers 2. These transistors are here arranged symmetrically with respect to a median longitudinal axis XX of the diagrammatic mask.
- Each gate finger 2 is positioned between the drain and source electrodes integrated into the metal strip elements, here referenced 3, 3 ′ for the drains and 4, 4 'or 4 "for the sources.
- the multiplication of the number of FET transistors allows to obtain a power gain as illustrated in FIG. 4.
- Two input ports are provided at the coupler 1, each constituting a coplanar CPW waveguide for connection to two of the FET transistors.
- One of these accesses are composed from 4 and 4 "source elements and a grid 5, the other is composed from source elements 4 and 4 'and a grid 5.
- the source element 4 is common to the two guides.
- the combiner that constitutes coupler 1 simultaneously receives two input signals excited in phase opposition by the two waveguides coplanar whose entries are referenced "-Sin” and "+ Sin” in Figure 1.
- the insulation between these inputs is provided here by the active parts of the FET transistors.
- Intermediate output signals are respectively obtained between the elements forming source and drain electrodes for FET transistors.
- a line of ribbons output coplanar consists of the two metal bands accessing the drain electrodes. Intermediate signals recombine in phase across a CPS T-junction.
- the line of coplanar ribbons at the outlet of this junction allows reduction of the dispersive nature of the circuit produced. It transmits the signal obtained after recombination at the Sout output of the combiner and it is here referenced to the mass.
- a schematic expression of the electric field between bands is given by the arrows placed on figure 1.
- a gain greater than + 1 dB in transmission and greater than -20 dB in reverse transmission are obtained between a input signal and output signal, as well as insulation below -10 dB between the two input signals in a wide frequency range extending to the 20 GHz.
- a power gain of the order of +10 dB is obtained for a 11 GHz frequency, when the input ports are simultaneously excited by two signals in phase opposition.
- An additional 5 "metal strip element is added to the elements tape which extend the elements 5 and 5 'at the input of the coupler to constitute the second element to ground of the input CPW coplanar waveguide which is then fitted the coupler.
- the two elements 5 ′ and 5 are then connected by an air bridge 6, the two source elements 4 ', 4 "being also connected to the source element 4 by 6 'air bridge.
- FIG. 3 The application of a coupler according to the invention to a power combiner at 180 ° positioned at the outlet of a balanced mixer is shown in Figure 3.
- the coupler presented on figure 2 is then supplemented by a coplanar waveguide Output CPW and it is attacked by the mixer, not shown, through a CPS coplanar strip line obtained by extending elements 5 and 5 '.
- a additional metal strip element 3 " is added to elements 3 and 3 'in output of the coupler to constitute the second element to the ground of the waveguide coplanar output CPW with which the coupler is then fitted.
- the two elements 3 and 3 " are then connected by an air bridge 6 ", while the two source elements 4 ', 4" also being connected to the source element 4 by air bridges 6 '.
- the combiner obtained power which has an output CPW coplanar waveguide at the mass is thus provided with two floating differential inputs.
- the variant embodiment shown in FIG. 4 relates to a higher power combiner which is obtained by duplication from that presented in Figure 1 and which improves electrical performance in terms of relates to the gain and linearity of the power characteristic.
- the coupler comprises eight FET transistors with a gate finger 12 or 12 'or four FET transistors with two gate fingers. These transistors are arranged here symmetrically with respect to the median longitudinal axis XX of the diagrammatic mask. Each grid finger 12 is positioned between two metal strip elements, one of drain 13 or 13 'and the other of source 14, 14' or 14 ". The multiplication of number of FET transistors provides power gain as already indicated.
- Two input ports are provided at the coupler, each constituting a coplanar CPW waveguide for connection to four FET transistors.
- One is composed from source elements 14 and 14 "and a grid element 15 and the other from the source elements 14 and 14 'and a grid element 15'.
- the source element 14 is common to the two guides.
- the two source elements 14 "and 14 ' are connected to the source element 14 by air bridges 16.
- Each of the CPW coplanar waveguides forming the input ports of the coupler is separated into two lines with internal coplanar bands.
- a CPS / CPW T-junction is made in the coupler at Shocks access between waveguides and lines with coplanar ribbons for access to FET transistors to allow transmission to these transistors of the signal received via the access considered.
- These transistors are either two of the four two-finger transistors of the grid of the coupler, i.e. four of the eight transistors to a grid finger, according to the chosen option.
- intermediate output signals are respectively obtained between the elements relating to the source and source electrodes drain of FET transistors.
- the intermediate signals respectively obtained for each access is transmitted via CPW coplanar waveguides and via a CPW / CPS transition per access. These intermediate signals recombine in phase at the CPS T-junction.
- the output signal Sout is obtained from the line with coplanar tapes leaving the junction.
- this combiner corresponds to that of the combiner described in relation to Figure 1.
- Two input signals "-Sin”, “+ Sin” in opposition to phase are simultaneously applied each at one of the two sets grids.
- Gain and saturation power output values of respectively 6.8 dB and 11.5 dBm at 11 GHz are likely to be obtained instead of 3.5 dB and 5.9 dBm for the combiner presented in figure 1.
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- Microwave Amplifiers (AREA)
- Junction Field-Effect Transistors (AREA)
- Networks Using Active Elements (AREA)
Claims (9)
- Koplanarer, aktiver und symmetrischer Mikrowellenkoppler für einen monolithischen integrierten Schaltkreis MMIC, enthaltend FET-Transistoren, die mit metallischen Steuer-, Source- und Drain-Elektroden dotiert sind, die in flache, koplanare Metallelemente (3, 4, 4', 4", 4, 5') integriert sind, die so kombiniert sind, daß sie die Eingänge und Ausgänge des Kopplers bilden, wobei sich die Anzahl der Eingänge von derjenigen der Ausgänge unterscheidet, dadurch gekennzeichnet. daß die Gesamtheit dieser Eingänge von einer Schaltung gebildet wird, die eine oder mehrere koplanare Bandleitungen CPS und einen oder mehrere koplanare Wellenleiter CPW enthält.
- Koppler nach Anspruch 1, enthaltend eine zentrale, gemeinsame, schwebende Elektrode, die durch die Verwendung der koplanaren Bandleitungen CPS in der Eingangseinheit erhalten wird.
- Koppler nach einem der Ansprüche 1,2, enthaltend zwei Eingänge, die aus zwei koplanaren Wellenleitern zusammengesetzt sind, die unter der Einwirkung von in entgegengesetzter Phase erregten Signalen jeweils auf eine Hälfte der Transistoren des Kopplers wirken, und einen Ausgang, der sich aus einer koplanaren Bandleitung CPS zusammensetzt, die an ein T-Glied angeschlossen ist, in dem die von den Transistoren stammenden Zwischensignale wieder in Phase verbunden werden.
- Koppler nach einem der Ansprüche 1 bis 3 des Teiler-Typs, enthaltend einen schwebenden Eingang, der durch Anfügen eines CPS/CPW-Übergangs erhalten wird.
- Koppler nach Anspruch 4, umfassend einen vorgeschalteten koplanaren EingangsWellenleiter, der durch Anfügen eines zusätzlichen metallischen Erdungselements parallel zu den beiden Elementen der koplanaren Eingangsbandleitungen erhalten wird, wobei eines der Elemente auf die Erdung bezogen ist.
- Koppler nach einem der Ansprüche 1 bis 3 des Kombinator-Typs, enthaltend einen schwebenden Eingang, der durch Anfügen einer koplanaren Bandleitung CPS vor einem Eingangsübergang CPS/CPW des Kopplers erhalten wird.
- Koppler nach Anspruch 6, enthaltend einen koplanaren CPW-Ausgangs-Wellenleiter. der durch Anfügen eines zusätzlichen metallischen Erdungselements parallel zu den beiden Elementen der koplanaren Ausgangsbandleitung erhalten wird, wobei eines der Elemente auf die Erdung bezogen ist.
- Koppler nach einem der Ansprüche 1 bis 7, bei dem die Anzahl der Transistoren, die über einen Eingang betrieben werden, gleich zwei oder einem Vielfachen von zwei ist, wobei alle Transistoren entweder einen oder alternativ zwei Gitterfinger enthalten.
- Monolithischer integrierter Schaltkreis MMIC, dadurch gekennzeichnet. daß er einen Mikrowellenkoppler nach einem der Ansprüche 1 bis 8 enthält.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9812433 | 1998-10-05 | ||
FR9812433A FR2784234A1 (fr) | 1998-10-05 | 1998-10-05 | Coupleur hyperfrequence pour circuit integre monolithique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0993066A1 EP0993066A1 (de) | 2000-04-12 |
EP0993066B1 true EP0993066B1 (de) | 2003-05-07 |
Family
ID=9531190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99402421A Expired - Lifetime EP0993066B1 (de) | 1998-10-05 | 1999-10-04 | Mikrowellenkoppler für monolitisch integrierten Schaltkreis |
Country Status (6)
Country | Link |
---|---|
US (1) | US6331807B1 (de) |
EP (1) | EP0993066B1 (de) |
JP (1) | JP2000299620A (de) |
AT (1) | ATE239983T1 (de) |
DE (1) | DE69907595T2 (de) |
FR (1) | FR2784234A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6670865B2 (en) | 2001-06-06 | 2003-12-30 | Noel A. Lopez | Method and apparatus for low loss high frequency transmission |
JP2003257988A (ja) * | 2002-03-05 | 2003-09-12 | Sharp Corp | トランジスタ回路および通信装置 |
WO2007034658A1 (ja) * | 2005-09-26 | 2007-03-29 | Nec Corporation | バラン回路及び集積回路装置 |
US8339790B2 (en) | 2010-09-10 | 2012-12-25 | Raytheon Company | Monolithic microwave integrated circuit |
CN111146549B (zh) * | 2020-01-14 | 2021-04-20 | 电子科技大学 | 基于耦合结构的接地共面波导功率分配/合成网络 |
CN115333504B (zh) * | 2022-10-12 | 2022-12-27 | 电子科技大学 | 一种集成通道切换的功分网络单片微波集成电路 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3848198A (en) * | 1972-12-14 | 1974-11-12 | Rca Corp | Microwave transmission line and devices using multiple coplanar conductors |
US5105171A (en) * | 1991-04-29 | 1992-04-14 | Hughes Aircraft Company | Coplanar waveguide directional coupler and flip-clip microwave monolithic integrated circuit assembly incorporating the coupler |
US5194833A (en) * | 1991-11-15 | 1993-03-16 | Motorola, Inc. | Airbridge compensated microwave conductors |
US5698469A (en) * | 1994-09-26 | 1997-12-16 | Endgate Corporation | Method of making a hybrid circuit with a chip having active devices with extra-chip interconnections |
US5610563A (en) * | 1994-09-26 | 1997-03-11 | Endgate Corporation | Slot line to CPW circuit structure |
US5550518A (en) * | 1995-06-12 | 1996-08-27 | Endgate Corporation | Miniature active conversion between microstrip and coplanar wave guide |
US5821815A (en) * | 1996-09-25 | 1998-10-13 | Endgate Corporation | Miniature active conversion between slotline and coplanar waveguide |
EP0880194A1 (de) * | 1997-05-21 | 1998-11-25 | Ulrich D. Dr. Keil | Streifenleitungsübertragungsvorrichtung |
-
1998
- 1998-10-05 FR FR9812433A patent/FR2784234A1/fr not_active Withdrawn
-
1999
- 1999-10-04 US US09/411,227 patent/US6331807B1/en not_active Expired - Fee Related
- 1999-10-04 EP EP99402421A patent/EP0993066B1/de not_active Expired - Lifetime
- 1999-10-04 DE DE69907595T patent/DE69907595T2/de not_active Expired - Fee Related
- 1999-10-04 AT AT99402421T patent/ATE239983T1/de not_active IP Right Cessation
- 1999-10-04 JP JP11282321A patent/JP2000299620A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
ATE239983T1 (de) | 2003-05-15 |
US6331807B1 (en) | 2001-12-18 |
EP0993066A1 (de) | 2000-04-12 |
DE69907595D1 (de) | 2003-06-12 |
DE69907595T2 (de) | 2004-03-11 |
FR2784234A1 (fr) | 2000-04-07 |
JP2000299620A (ja) | 2000-10-24 |
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