EP0095808B1 - Microwave directional coupler with four transmission lines, and passive power distribution circuit similarly realised - Google Patents
Microwave directional coupler with four transmission lines, and passive power distribution circuit similarly realised Download PDFInfo
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- EP0095808B1 EP0095808B1 EP83200731A EP83200731A EP0095808B1 EP 0095808 B1 EP0095808 B1 EP 0095808B1 EP 83200731 A EP83200731 A EP 83200731A EP 83200731 A EP83200731 A EP 83200731A EP 0095808 B1 EP0095808 B1 EP 0095808B1
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- Prior art keywords
- coupler
- transmission lines
- line portions
- line
- zone
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- 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
- H01P5/19—Conjugate devices, i.e. devices having at least one port decoupled from one other port of the junction type
- H01P5/22—Hybrid ring junctions
- H01P5/227—90° branch line couplers
Definitions
- the present invention relates to a microwave directional coupler with four transmission lines, as well as a passive power distributor circuit produced in a similar manner.
- a power distribution circuit with four transmission lines, passive, reciprocal and without loss, further constitutes a directional coupler if each of the accesses to the lines. transmission is suitable.
- a directional coupler with very flat coupling published in the journal IEEE Transactions on Microwave Theory and Techniques, vol. MTT-26, n ° 2, February 1978, p.
- GP Riblet offers for the adaptation of a coupler in triplate lines a set of four short-circuited quarter-wave sections or four open-circuit half-wave sections, located at a quarter wavelength coupler inputs (sections ⁇ / 4: see Figure 3 of the cited document; sections X / 2: see Figure 4 of this same document where these elements are further folded to make the coupler more compact; we can also refer Figures 3 and 5 of English Patent No. 1,582,285 filed by GP Riblet). In all cases, it should however be noted that this is an adaptation carried out outside the coupler.
- a first object of the invention is to propose a directional coupler which is both compact and suitable over a frequency band greater than what is obtained with the previous embodiments.
- the invention relates to a structure coupler such that it comprises, for the connection of transmission lines, four line sections of width less than that of the transmission lines and electrically connected in their central zone and, superimposed so symmetrical to these line sections to achieve capacitive coupling with them in four zones or, in an alternative embodiment, an electrical connection, a resonant ring of width substantially equal to that of the transmission lines and of average perimeter such as the frequency of resonance is located just below the bandwidth of the coupler.
- Another object of the invention is to propose a passive power distributor circuit produced in a similar manner, with a structure also in accordance with the invention, and which, for this purpose, comprises n sections of transmission line of width less than that transmission lines and arranged radially between the end of these lines and the central zone common to these sections, as well as a ring of width close to that of the transmission lines and superimposed symmetrically on these line sections in zones located in the vicinity of the end thereof to perform capacitive coupling with them in these zones or, in an alternative embodiment, connected to the line sections in zones situated in the vicinity of the end thereof , so as to surround them symmetrically.
- FIGS. 1 to 4 show, by way of nonlimiting examples, four distinct embodiments of the present invention.
- the directional coupler described with reference to FIGS. 1 and 2 in two embodiments in triplate lines comprises on the one hand two sections of transmission lines 10b and 20b for the two-to-two connection of the opposite transmission lines 10a, 10c and 20a, 20c.
- these two sections which are here perpendicular have a width less than that of the lines so as to constitute two sections of higher impedance, and are moreover electrically connected together in their central zone 40.
- the coupler also comprises a resonant ring 30, here substantially equal (or less) in width than that of the transmission lines and superimposed symmetrically on the two line sections 10b and 20b (without electrical connection with them) to achieve with them a capacitive coupling in the four zones 11a, 21a, 11b, 21b where the ring and the two line sections are opposite.
- the circumference of this ring is chosen such that its resonant frequency is just below the passband of the coupler.
- the structure thus adapted using the principle of duality mentioned above is completely symmetrical, in the sense that, despite the presence of the electrical connection zone 40, there is no coupling between the elements 10a, 10b, 10c located on one axis and the elements 20a, 20b, 20c located on the other perpendicular axis, and this on about an octave since the line sections 10b, 20b and the ring 30 have inductive and capacitive behaviors which compensate each other very satisfactory on such a frequency band.
- the line sections 10b and 20b are straight and the ring 30 is circular.
- an optimization of the adaptation can be obtained by increasing the length of the line sections 10b and 20b by approximately 10% and by reducing the on the contrary, the average perimeter of the ring 30.
- the line sections are now curvilinear, while remaining perpendicular in their central zone, and a square shape is adopted for the ring 30, by replacing the four arcs of circle composing this ring by the ropes which underlie them (one can also adopt only one of these two provisions); in this way, the ends of the sides of the square ring coincide with the zones of capacitive or galvanic coupling between this ring and the line sections.
- the present invention is not limited to the previous exemplary embodiments, from which variants can be proposed without thereby departing from the scope of the invention.
- the coupling between the ring and the line sections must be galvanic, which leads to an arrangement such that that of FIG. 3, in which the connection is now electrical between the ring 30 and the line sections 10b and 20b, the four zones 11a, 21a, 11b, 21b now being common to this ring and these sections line, and the average perimeter of the remaining ring such that its resonant frequency is located just below the passband of the coupler; this change occurs at the cost of a slight reduction in bandwidth.
- the line sections in any of the embodiments proposed, a variable width, increasing or decreasing from one end to the other, for the purpose of impedance transformation.
- a passive power distributor circuit here with five transmission lines 50a to 50e. As shown in Figure 4, these lines are distributed symmetrically and five sections of lines.
- transmission 60a to 60e of width less than that of the lines to form sections of impedance greater than that of the lines, are arranged radially; between the end of the lines and the central connection area 80 common to these sections.
- a ring 130 of width here substantially equal to or slightly less than that of the transmission lines is connected in the vicinity of their end to the line sections 60a to 60e in the zones 70a to 70e, so as to surround these sections symmetrically (l 'ring could also as previously be capacitive coupling with the line sections, always in areas located near the end thereof.
- couplers described above can be implemented in other types of couplers, and in particular in impedance transformation couplers such as that described in the patent.
- the invention is also not limited by the technological aspects of its production. Specific examples of implementation have been given in triplate lines or in microstrip, but the invention is also applicable in the case of so-called coplanar structures, or in the case of periodic transmission structures for monolithic microwave circuits, such as that described in English Patent No. 2,056,783, or in the case of structures made of localized elements.
Description
La présente invention concerne un coupleur directionnel hyperfréquence à quatre lignes de transmission, ainsi qu'un circuit répartiteur de puissance passif réalisé de façon similaire.The present invention relates to a microwave directional coupler with four transmission lines, as well as a passive power distributor circuit produced in a similar manner.
Un circuit répartiteur de puissance à quatre lignes de transmission, passif, réciproque et sans' pertes, constitue en outre un coupleur directionnel si chacun des accès aux lignes de. transmission est adapté. Dans l'article «A directional coupler with very flat coupling », paru dans la revue IEEE Transactions on Microwave Theory and Techniques, vol. MTT-26, n° 2, février 1978, p. 70-74, G. P. Riblet propose pour l'adaptation d'un coupleur en lignes triplaques un ensemble de quatre tronçons quart d'onde court-circuités ou de quatre tronçons demi-onde en circuit ouvert, situés à un quart de longueur d'onde des entrées du coupleur (tronçons λ/4: voir la figure 3 du document cité ; tronçons X/2 : voir la figure 4 de ce même document où ces éléments sont en outre repliés pour rendre le coupleur plus compact ; on peut se reporter également aux figures 3 et 5 du brevet anglais n° 1.582.285 déposé par G. P. Riblet). Dans tous les cas, on notera cependant qu'il s'agit d'une adaptation réalisée à l'extérieur du coupleur.A power distribution circuit with four transmission lines, passive, reciprocal and without loss, further constitutes a directional coupler if each of the accesses to the lines. transmission is suitable. In the article "A directional coupler with very flat coupling", published in the journal IEEE Transactions on Microwave Theory and Techniques, vol. MTT-26, n ° 2, February 1978, p. 70-74, GP Riblet offers for the adaptation of a coupler in triplate lines a set of four short-circuited quarter-wave sections or four open-circuit half-wave sections, located at a quarter wavelength coupler inputs (sections λ / 4: see Figure 3 of the cited document; sections X / 2: see Figure 4 of this same document where these elements are further folded to make the coupler more compact; we can also refer Figures 3 and 5 of English Patent No. 1,582,285 filed by GP Riblet). In all cases, it should however be noted that this is an adaptation carried out outside the coupler.
Dans le brevet des Etats-Unis d'Amérique n° 4.127.832 déposé le 28 mars 1977 et délivré le 28 novembre 1978 (voir les figures 3 et 5), ainsi que dans l'article « An eigenadmittance condition applicable to symmetrical four-ports circulators and hybrids paru dans la revue IEEE Transactions on Microwave Theory and techniques, vol. MTT-26, n° 4, avril 1978, p. 275-279 (voir la figure 2), G. P. Riblet propose également pour l'adaptation d'un coupleur hybride en lignes triplaques un ensemble de quatre secteurs métalliques capacitifs distincts et indépendants placés cette fois à l'intérieur du coupleur en étant raccordés respectivement aux quatre points d'accès des lignes de transmission. Ce coupleur relativement compact n'est cependant réellement adapté qu'à une seule fréquence (voir la courbe représentée sur la figure 3 de l'article cité).In United States Patent No. 4,127,832 filed March 28, 1977 and issued November 28, 1978 (see Figures 3 and 5), as well as in the article "An eigenadmittance condition applicable to symmetrical four- ports circulators and hybrids published in the journal IEEE Transactions on Microwave Theory and techniques, vol. MTT-26, n ° 4, April 1978, p. 275-279 (see Figure 2), GP Riblet also offers for the adaptation of a hybrid coupler in triplate lines a set of four distinct and independent capacitive metal sectors placed this time inside the coupler by being respectively connected to the four access points for transmission lines. This relatively compact coupler is however really only suitable for a single frequency (see the curve shown in Figure 3 of the cited article).
Un premier but de l'invention est de proposer un coupleur directionnel à la fois compact et adapté sur une bande de fréquences supérieure à ce qui est obtenu avec les réalisations antérieures.A first object of the invention is to propose a directional coupler which is both compact and suitable over a frequency band greater than what is obtained with the previous embodiments.
L'invention concerne à cet effet un coupleur de structure telle qu'il comprend, pour la liaison des lignes de transmission, quatre tronçons de ligne de largeur inférieure à celle des lignes de transmission et reliés électriquement dans leur zone centrale et, superposé de façon symétrique à ces tronçons de ligne pour réaliser avec eux en quatre zones un couplage capacitif ou, dans une variante de réalisation, une liaison électrique, un anneau résonnant de largeur sensiblement égale à celle des lignes de transmission et de périmètre moyen tel que la fréquence de résonance soit située juste au-dessous de la bande passante du coupleur.To this end, the invention relates to a structure coupler such that it comprises, for the connection of transmission lines, four line sections of width less than that of the transmission lines and electrically connected in their central zone and, superimposed so symmetrical to these line sections to achieve capacitive coupling with them in four zones or, in an alternative embodiment, an electrical connection, a resonant ring of width substantially equal to that of the transmission lines and of average perimeter such as the frequency of resonance is located just below the bandwidth of the coupler.
L'avantage de l'une ou l'autre de ces deux structures est que, sur environ une octave, l'anneau résonnant est adapté individuellement avec chacun des deux tronçons de ligne, conformément au principe d'adaptation par dualité décrit de façon très générale par F. C. de Ronde dans la communication invitée cc'Full-band mat- ching of waveguide discontinuities faite au MTT-Symposium tenu à Palo Alto, Etats-Unis en 1966.The advantage of one or the other of these two structures is that, over approximately one octave, the resonant ring is adapted individually with each of the two line sections, in accordance with the principle of adaptation by duality described very clearly. general by FC de Ronde in the invited communication cc'Full-band mat- ching of waveguide discontinuities made at the MTT-Symposium held in Palo Alto, USA in 1966.
Un autre but de l'invention est de proposer un circuit répartiteur de puissance passif réalisé de façon similaire, avec une structure également conforme à l'invention, et qui, à cet effet, comprend n tronçons de ligne de transmission de largeur inférieure à celle des lignes de transmission et disposés de façon radiale entre l'extrémité de ces lignes et la zone centrale commune à ces tronçons, ainsi qu'un anneau de largeur voisine de celle des lignes de transmission et superposé de façon symétrique à ces tronçons de ligne dans des zones situées au voisinage de l'extrémité de ceux-ci pour réaliser avec eux un couplage capacitif dans ces zones ou, dans une variante de réalisation, raccordé aux tronçons de ligne dans des zones situées au voisinage de l'extrémité de ceux-ci, de manière à les entourer de façon symétrique.Another object of the invention is to propose a passive power distributor circuit produced in a similar manner, with a structure also in accordance with the invention, and which, for this purpose, comprises n sections of transmission line of width less than that transmission lines and arranged radially between the end of these lines and the central zone common to these sections, as well as a ring of width close to that of the transmission lines and superimposed symmetrically on these line sections in zones located in the vicinity of the end thereof to perform capacitive coupling with them in these zones or, in an alternative embodiment, connected to the line sections in zones situated in the vicinity of the end thereof , so as to surround them symmetrically.
Un circuit répartiteur de puissance adoptant cette structure avec n = 5 a été réalisé notamment pour la bande de fréquence comprise entre 4 et 8 gigahertz (avec les dimensions suivantes dans une réalisation sur substrat de quartz d'épaisseur 1,5 mm : largeur des lignes = 3 mm, largeur de l'anneau = 2 mm, largeur des 5 tronçons de lignes = 0,5 mm, diamètre extérieur de l'anneau = 17 mm environ) et, sur une octave, on a pu observer que les réflexions au niveau de chaque accès restaient très faibles et que le déséquilibre des puissances était au plus égal à 0,5 dB.A power distribution circuit adopting this structure with n = 5 has been produced in particular for the frequency band between 4 and 8 gigahertz (with the following dimensions in an embodiment on quartz substrate 1.5 mm thick: line width = 3 mm, width of the ring = 2 mm, width of the 5 line sections = 0.5 mm, outside diameter of the ring = around 17 mm) and, on an octave, it was observed that the reflections at the level of each access remained very low and that the power imbalance was at most equal to 0.5 dB.
Les particularités et avantages de l'invention seront maintenant précisés dans la description qui suit et dans les figures 1 à 4 annexées qui montrent, à titre d'exemples non limitatifs, quatre modes de réalisation distincts de la présente invention.The features and advantages of the invention will now be explained in the description which follows and in the appended FIGS. 1 to 4 which show, by way of nonlimiting examples, four distinct embodiments of the present invention.
Le coupleur directionnel décrit en référence aux figures 1 et 2 dans deux modes de réalisation en lignes triplaques comprend d'une part deux tronçons de lignes de transmission 10b et 20b pour la liaison deux à deux des lignes de transmission opposées 10a, 10c et 20a, 20c. Pour une largeur déterminée des lignes de transmission; ces deux tronçons qui sont ici perpendiculaires ont une largeur inférieure à celle des lignes de façon à constituer deux tronçons de plus haute impédance, et sont par ailleurs reliés électriquement entre eux dans leur zone centrale 40.The directional coupler described with reference to FIGS. 1 and 2 in two embodiments in triplate lines comprises on the one hand two sections of
Le coupleur comprend d'autre part un anneau résonnant 30, de largeur ici sensiblement égale (ou inférieure) à celle des lignes de transmission et superposé de façon symétrique aux deux tronçons de ligne 10b et 20b (sans liaison éiectri- que avec eux) pour réaliser avec ceux-ci un couplage capacitif dans les quatre zones 11a, 21 a, 11 b, 21 b où l'anneau et les deux tronçons de ligne sont en regard. La circonférence de cet anneau est choisie de façon telle que sa fréquence de résonance se trouve juste au-dessous de la bande passante du coupleur.The coupler also comprises a
La structure ainsi adaptée en utilisant le principe de dualité mentionné plus haut est complètement symétrique, en ce sens que, malgré la présence de la zone de liaison électrique 40, il n'y a pas de couplage entre les éléments 10a, 10b, 10c situés sur un axe et les éléments 20a, 20b, 20c situés sur l'autre axe perpendiculaire, et ce sur environ une octave puisque les tronçons de ligne 10b, 20b et l'anneau 30 ont des comportements inductif et capacitif qui se compensent de façon très satisfaisante sur une telle bande de fréquences.The structure thus adapted using the principle of duality mentioned above is completely symmetrical, in the sense that, despite the presence of the
Dans le mode de réalisation de la figure 1, les tronçons de ligne 10b et 20b sont rectilignes et l'anneau 30 est circulaire. Dans le mode de réalisation de la figure 2 et d'une manière générale dans les autres modes décrits, une optimisation de l'adaptation peut être obtenue en augmentant la longueur des tronçons de ligne 10b et 20b d'environ 10 % et en réduisant au contraire le périmètre moyen de l'anneau 30. Les tronçons de ligne sont maintenant curvilignes, tout en restant perpendiculaires dans leur zone centrale, et une forme carrée est adoptée pour l'anneau 30, par remplacement des quatre arcs de cercle composant cet anneau par les cordes qui les sous-tendent (on peut aussi n'adopter que l'une de ces deux dispositions) ; de la sorte, les extrémités des côtés de l'anneau carré coïncident avec les zones de couplage capacitif ou galvanique entre cet anneau et les tronçons de ligne.In the embodiment of Figure 1, the
Bien entendu, la présente invention n'est pas limitée aux exemples de réalisation précédents, à partir desquels des variantes peuvent être proposées sans pour cela sortir du cadre de l'invention. Par exemple, lorsqu'on veut une structure non plus en lignes triplaques comme dans le cas des figures 1 et 2 mais en microruban, le couplage entre l'anneau et les tronçons de ligne doit être galvanique, ce qui conduit à une disposition telle que celle de la figure 3, dans laquelle la liaison est maintenant électrique entre l'anneau 30 et les tronçons de ligne 10b et 20b, les quatre zones 11 a, 21 a, 11 b, 21 b étant maintenant communes à cet anneau et ces tronçons de ligne, et le périmètre moyen de l'anneau restant tel que sa fréquence de résonance soit située juste au-dessous de la bande passante du coupleur ; cette modification se produit au prix d'une légère réduction de bande passante. On peut aussi donner aux tronçons de ligne, dans l'un quelconque des modes de réalisation proposés, une largeur variable, croissante ou décroissante d'une extrémité à l'autre, à des fins de transformation d'impédance.Of course, the present invention is not limited to the previous exemplary embodiments, from which variants can be proposed without thereby departing from the scope of the invention. For example, when a structure is no longer in triplate lines as in the case of FIGS. 1 and 2 but in a microstrip, the coupling between the ring and the line sections must be galvanic, which leads to an arrangement such that that of FIG. 3, in which the connection is now electrical between the
Par ailleurs, une réalisation similaire à celle du coupleur hyperfréquence qui a été décrit peut être obtenue dans un circuit répartiteur de puissance passif, ici à cinq lignes de transmission 50a à 50e. Comme le montre la figure 4, ces lignes sont réparties symétriquement et cinq tronçons de lignes de. transmission 60a à 60e, de largeur inférieure à celle des lignes pour constituer des tronçons d'impédance supérieure à celle des lignes, sont disposes de façon radiale; entre l'extrémité des lignes et la zone centrale 80 de raccordement commune à ces tronçons. Un anneau 130 de largeur ici sensiblement égale ou un peu inférieure à celle des lignes de transmission est raccordé au voisinage de leur extrémité aux tronçons de ligne 60a à 60e dans les zones 70a à 70e, de manière à entourer ces tronçons de façon symétrique (l'anneau pourrait aussi comme précédemment être à couplage capacitif avec les tronçons de ligne, toujours dans des zones situées au voisinage de l'extrémité de ceux-ci).Furthermore, an embodiment similar to that of the microwave coupler which has been described can be obtained in a passive power distributor circuit, here with five
On notera aussi que l'adaptation réalisée conformément à l'invention dans les exemples de coupleurs décrits précédemment peut être mise en oeuvre dans d'autres types de coupleurs, et notamment dans les coupleurs à transformation d'impédance tels que celui décrit dans le brevet des Etats-Unis d'Amérique n° 4 305 043 délivré le 8 décembre 1981 au nom de la société cessionnaire Ford Aerospace and Communications Corporation (voir la figure 6 de ce document), ou bien dans les chaînes de coupleurs-transformateurs décrites dans l'article de L. F. Lind paru dans la revue IEEE Transactions on Microwave Theory and Techniques, vol. MTT-17, n° 1, janvier 1969, p. 45-48.It will also be noted that the adaptation carried out in accordance with the invention in the examples of couplers described above can be implemented in other types of couplers, and in particular in impedance transformation couplers such as that described in the patent. United States of America No. 4,305,043 issued December 8, 1981 in the name of the transferee Ford Aerospace and Communications Corporation (see Figure 6 of this document), or in the coupler-transformer chains described in article by LF Lind published in the journal IEEE Transactions on Microwave Theory and Techniques, vol. MTT-17, n ° 1, January 1969, p. 45-48.
L'invention n'est pas limitée non plus par les aspects technologiques de sa réalisation. On a en effet donné des exemples précis de réalisation en lignes triplaques ou en microruban, mais l'invention est également applicable dans le cas de structures dites coplanaires, ou dans le cas de structures de transmission périodiques pour circuits hyperfréquences monolithiques, telles que celle décrite dans le brevet anglais n° 2 056 783, ou encore dans le cas de structures réalisées en éléments localisés.The invention is also not limited by the technological aspects of its production. Specific examples of implementation have been given in triplate lines or in microstrip, but the invention is also applicable in the case of so-called coplanar structures, or in the case of periodic transmission structures for monolithic microwave circuits, such as that described in English Patent No. 2,056,783, or in the case of structures made of localized elements.
Claims (10)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8209383 | 1982-05-28 | ||
| FR8209383A FR2527846A1 (en) | 1982-05-28 | 1982-05-28 | HYPERFREQUENCY DIRECTIONAL COUPLER WITH FOUR TRANSMISSION LINES AND PASSIVE POWER DISTRIBUTION CIRCUIT SIMILARLY CONDUCTED |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0095808A1 EP0095808A1 (en) | 1983-12-07 |
| EP0095808B1 true EP0095808B1 (en) | 1986-08-20 |
Family
ID=9274461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83200731A Expired EP0095808B1 (en) | 1982-05-28 | 1983-05-25 | Microwave directional coupler with four transmission lines, and passive power distribution circuit similarly realised |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4525690A (en) |
| EP (1) | EP0095808B1 (en) |
| JP (1) | JPS58215103A (en) |
| CA (1) | CA1205152A (en) |
| DE (1) | DE3365434D1 (en) |
| FR (1) | FR2527846A1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4667172A (en) * | 1986-04-07 | 1987-05-19 | Motorola, Inc. | Ceramic transmitter combiner with variable electrical length tuning stub and coupling loop interface |
| US4646038A (en) * | 1986-04-07 | 1987-02-24 | Motorola, Inc. | Ceramic resonator filter with electromagnetic shielding |
| JPH0738301A (en) * | 1993-07-23 | 1995-02-07 | Nec Corp | Cross circuit of strip line |
| ATE175528T1 (en) * | 1993-10-07 | 1999-01-15 | Andrew Corp | CONNECTOR WITH PROTECTION AGAINST OVERVOLTAGE |
| FI98418C (en) * | 1995-06-07 | 1997-06-10 | Nokia Telecommunications Oy | Bypassable Wilkinson power distributor |
| GB2347793A (en) * | 1999-03-09 | 2000-09-13 | Isis Innovation | Degenerate mode combiner |
| US6636407B1 (en) | 2000-09-13 | 2003-10-21 | Andrew Corporation | Broadband surge protector for RF/DC carrying conductor |
| JP3988698B2 (en) | 2003-08-08 | 2007-10-10 | 株式会社村田製作所 | Directional coupler and high-frequency circuit device |
| KR100604159B1 (en) | 2004-04-14 | 2006-07-25 | 광운대학교 산학협력단 | Branch Line Coupler with Cross Coupling |
| JP4379254B2 (en) * | 2004-08-16 | 2009-12-09 | ソニー株式会社 | Distributor and communication method |
| US7349191B2 (en) * | 2005-09-01 | 2008-03-25 | Andrew Corporation | Offset planar coil coaxial surge suppressor |
| US7324318B2 (en) * | 2005-10-07 | 2008-01-29 | Andrew Corporation | Multiple planar inductor coaxial surge suppressor |
| US20070097583A1 (en) * | 2005-10-31 | 2007-05-03 | Andrew Corporation | Tuned Coil Coaxial Surge Suppressor |
| US7483251B2 (en) * | 2006-01-13 | 2009-01-27 | Andrew Llc | Multiple planar inductive loop surge suppressor |
| JP2007309682A (en) * | 2006-05-16 | 2007-11-29 | Renesas Technology Corp | Transmission circuit, connection sheet, probe sheet, probe card, semiconductor inspection device, and method of manufacturing semiconductor device |
| US7583489B2 (en) * | 2006-05-22 | 2009-09-01 | Andrew Llc | Tungsten shorting stub and method of manufacture |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3040275A (en) * | 1957-06-27 | 1962-06-19 | Sage Laboratories | Coaxial hybrid |
| US3164791A (en) * | 1961-05-05 | 1965-01-05 | Melpar Inc | Strip line hybrid ring |
| US3619787A (en) * | 1970-05-14 | 1971-11-09 | Edward Salzberg | Microwave hybrid wheel |
| FR2276705A1 (en) * | 1974-06-26 | 1976-01-23 | Trt Telecom Radio Electr | Line directive coupler - flat conductors shaped and fitted near each other on an alumina substrate |
| CA1082782A (en) * | 1977-03-28 | 1980-07-29 | Gordon P. Riblet | Directional coupler |
| DE2804118C2 (en) * | 1978-01-31 | 1982-03-04 | Siemens AG, 1000 Berlin und 8000 München | Microwave ring hybrid circuit in stripline technology |
| US4328471A (en) * | 1980-09-15 | 1982-05-04 | General Electric Company | Bandwidth compensated quarter-wave coupled power combiner |
-
1982
- 1982-05-28 FR FR8209383A patent/FR2527846A1/en active Granted
-
1983
- 1983-05-25 EP EP83200731A patent/EP0095808B1/en not_active Expired
- 1983-05-25 DE DE8383200731T patent/DE3365434D1/en not_active Expired
- 1983-05-26 CA CA000428910A patent/CA1205152A/en not_active Expired
- 1983-05-27 JP JP58092594A patent/JPS58215103A/en active Granted
- 1983-05-31 US US06/499,648 patent/US4525690A/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 1982 IEEE MITT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, 15-17 juin 1982, New York, USA F.C. DE RONDE: "Octave-wide matched symmetrical, reciprocal, 4- and 5 ports" * |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1205152A (en) | 1986-05-27 |
| US4525690A (en) | 1985-06-25 |
| DE3365434D1 (en) | 1986-09-25 |
| JPS58215103A (en) | 1983-12-14 |
| FR2527846A1 (en) | 1983-12-02 |
| EP0095808A1 (en) | 1983-12-07 |
| JPH0226881B2 (en) | 1990-06-13 |
| FR2527846B1 (en) | 1985-01-18 |
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