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EP0100274B1 - Anpassungs- und Einweganordnung mit Ferritzirkulator - Google Patents

Anpassungs- und Einweganordnung mit Ferritzirkulator Download PDF

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Publication number
EP0100274B1
EP0100274B1 EP19830401483 EP83401483A EP0100274B1 EP 0100274 B1 EP0100274 B1 EP 0100274B1 EP 19830401483 EP19830401483 EP 19830401483 EP 83401483 A EP83401483 A EP 83401483A EP 0100274 B1 EP0100274 B1 EP 0100274B1
Authority
EP
European Patent Office
Prior art keywords
circuit
circulator
impedance
ferrite
branch
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
Application number
EP19830401483
Other languages
English (en)
French (fr)
Other versions
EP0100274A1 (de
Inventor
Claude Van Kerrebroeck
Manuel Modrego-Pena
François Jung
Jean-Pierre Manteaux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Thomson Faisceaux Hertziens SA
Original Assignee
Alcatel Thomson Faisceaux Hertziens SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alcatel Thomson Faisceaux Hertziens SA filed Critical Alcatel Thomson Faisceaux Hertziens SA
Publication of EP0100274A1 publication Critical patent/EP0100274A1/de
Application granted granted Critical
Publication of EP0100274B1 publication Critical patent/EP0100274B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/32—Non-reciprocal transmission devices
    • H01P1/38—Circulators
    • H01P1/383—Junction circulators, e.g. Y-circulators
    • H01P1/387—Strip line circulators

Definitions

  • the present invention relates to an adaptation and isolation device, comprising a ferrite circulator, for coupling a circuit to be adapted to a connection point, the circuit to be adapted being assimilable, from the point of view of its impedance, to a series resonant circuit.
  • Broadband adaptation devices for microwave circuits are based on the use of resonators which make it possible, in the case where the circuit to be adapted is not comparable to a parallel resonant circuit, to achieve the combined impedance of that of the circuit to be adapted in order to obtain a wide band of operating frequencies.
  • a circulator between the microwave circuit with its adaptation device and the access considered with the aim of achieving insulation or improving the standing wave ratio (R.O.S.).
  • connection between the circulator and the microwave circuit to be adapted is made, in a conventional manner, by switching to a standardized characteristic impedance (50 ohms for example); this leads to the need for two adaptation devices, one for the circuit to be adapted, and, consequently, a reduction in bandwidth.
  • the object of the present invention is to avoid drawbacks due to the use of the two adaptation devices.
  • a German patent application DE-A-3 034 034 describes an insulator comprising a circulator.
  • the coupling element chosen is a series oscillating circuit whose impedance added to that of the dissipative load is as close as possible to the combined impedance of the circulator; this series oscillating circuit replaces the impedance transformer, type ⁇ I4, which is usually used to carry out the adaptation and which is usually part of the circulator.
  • a circuit of this type comprises a central conductor arranged on an alumina substrate which itself is located between two conductive ground planes Circulators are introduced by placing a ferrite disc on each side of the ceramic and adding a magnetic circuit to polarize the ferrite.
  • the invention for its part, relates to an adaptation and isolation device for coupling a circuit to be adapted to a connection point comprising a ferrite circulator with three branches formed by a metal plate comprising a resonator disc around which are arranged the three branches at 120 ° from each other, the first branch being connected to this connection point, the second branch being connected to a bias resistor, the third branch being connected to the circuit to be adapted, characterized in that said plate metal is arranged inside a structure formed by two ground planes located on either side thereof, in that the first and second branches,.
  • the invention leads, not to replace an impedance transformer of type ⁇ I4 (which is part of the circulator) by a series oscillating circuit (added to the circulator), but to suppress the adaptation circuit of the parallel circuit type, usually used to couple a circuit to be adapted to a circulator; the circuit to be adapted is thus connected directly to the circulator without any element replacing the adaptation circuit.
  • Figure 1 is shown schematically the impedance of a circuit to be adapted in the most general case, that is to say in the case where this impedance is comparable to that of a resonant circuit series R1-L- C1. If the central working frequency, FO, of the circuit to be adapted is different from its resonant frequency, an impedance is added, in series with the circuit to be adapted to make these two frequencies equal; in the case of FIG. 1 this impedance is obtained by an inductor L'1.
  • the impedance, at the pulsation ⁇ , of the circuit to be adapted in FIG. 1 is: and its overvoltage coefficient
  • FIG. 2 represents a circuit to be adapted, 1, which is connected to a connection point, A, by an adaptation circuit, 10, followed by a circulator, 20 to 23.
  • the adaptation circuit, 10, is constituted, conventionally, using one or more parallel resonant circuits; the elements of this circuit 10 are chosen so that it has a purely ohmic input impedance and of value Zc given throughout the working frequency band, when its output is connected to the input of the circuit to be adapted.
  • the circulator although made up of a single element, has been represented by four blocks so as to distinguish between its different functions: a block, 20, called the switching circuit which relates to the “circulator” function proper in three blocks, 21 to 23, called impedance transformers, connected to each of the three ports of the switching circuit 20 to bring the impedances of the three ports of the circulator to the value Zc, mentioned above.
  • the “circulator” function represented by block 20 makes it possible to isolate the circuit to be adapted 1 from another circuit to be adapted connected downstream from point A, so as to improve the standing wave ratio at point A.
  • the transformers impedance, 21 to 23 have, like the adaptation circuit 10, an impedance adaptation role but, unlike circuit 10, they do not require resonators to play this role since, as it will be indicated later, a circulator presents at its accesses impedances of the type of those of parallel resonant circuits; the impedance transformers 21 to 23 are, most generally, constituted by quarter wave transformers.
  • the impedance transformer 21 is connected to point A, the impedance transformer 22 is connected to the first end of a resistor R whose second end is grounded: as for the impedance transformer 23 it is coupled to the circuit to be adapted 1 by the adaptation circuit 10.
  • FIG. 3 shows how, in the context of the invention, the circuit according to FIG. 2 is modified.
  • the circuit according to FIG. 3 differs from the circuit according to FIG. 2 by the fact that the impedance transformer 23 and the circuit adaptation 10 have been removed and replaced, as the case may be, either by a direct link, or by a simple impedance transformer 3 having no parallel resonant element; this alternative is shown by a drawing of the periphery of block 3 in broken lines.
  • Such an arrangement by removing the impedance transformer 23 and the matching circuit 10 is therefore from its resonator, has a wider bandwidth than the arrangement according to FIG. 2; in addition, due to the reduction in the number of elements, the assembly according to FIG. 3 has less losses than the assembly according to FIG. 2.
  • FIG. 4 represents a parallel resonant circuit, formed of a resistor R2 in parallel on an inductance L2 and a capacitor C2.
  • This figure is the schematic representation of the impedance of an access of a ferrite circulator whose impedance, at the pulsation ⁇ is:
  • FIG. 5 shows, in dashed lines, the periphery C of the assembly formed by the housing of the circulator and the housing of the circuit to be adapted which are placed side by side.
  • FIG. 5 only one part 4 is shown, situated in the middle of the circulator, two resonator connection plugs, 31, 32, and the field effect transistor, 11, of the circuit to be adapted 1 of FIG. 3 .
  • the part 4 constitutes the inner conductive part or ribbon (strip in Anglo-Saxon literature) of a structure of the triplate waveguide type, that is to say of a structure formed by two parallel ground planes and a ribbon arranged parallel to and between the two ground planes. These two ground planes appear in FIG. 6 where they bear the references 61 and 62.
  • the part 4 consists of a metallic plate of silver-plated brass 1.2 mm thick comprising a resonator disc 40, 14 mm in diameter. diameter, drilled with a centering hole, 44; around this disc are arranged three branches, 41, 42, 43, at 120 ° from one another.
  • the branches 41 and 42, of length clearly greater than the branch 43, are soldered to the inner conductor of the coaxial plugs, 31, 32.
  • the gate of the transistor 11 is polarized by means of the circulator; in fact the resistor R which, for the sake of simplification, is connected, in FIG. 3, directly between the circulator and the ground is, in reality, connected by its first end to the circulator (transformer 22 comprising the branch 42) and by its second end to a decoupling circuit; this decoupling circuit behaves as a short circuit at the working frequencies of the circuit to be adapted and as an infinite impedance for the DC bias voltage; this bias voltage is applied to the second end of the resistor R.
  • the decoupling circuit can be produced conventionally by open quarter-wave lines which bring back a short circuit and / or by a capacitor.
  • the impedance transformers 21 and 22 and the switching circuit 20 which constituted the circulator have been discussed.
  • the resonator disc 40 and the branches 41 and 42 correspond respectively to the switching circuit 20 and to the impedance transformers 21 and 22; these impedance transformers are of the quarter wave transformers type, that is to say that the length of the branches is substantially equal to a quarter of the length, in the circulator, of the wave at the average frequency of 3, 9 GHz.
  • the blocks 20, 21 and 22 of FIG. 3 are more precisely to be identified with the association of the elements 40, 41, 42 and the elements between which they are found inserted in the circulator and which will be described using in Figure 6.
  • An insulating cylindrical rod, 45 made of nylon (registered trademark), passes through the holes drilled in the tape 4 (hole 44) and in the ferrite discs, 51, 52, in order to ensure the positioning of these parts one by one. compared to others.
  • a very thin silver foil is placed between the disc 51 and the silica piece 53 on the one hand and the flange 61 on the other hand, to ensure good electrical contact between these elements.
  • Another sheet not shown, ensures good contact between the disc 52 and the silica piece 54 on the one hand and the flange 62 on the other.
  • the housing of the circulator comprises, between the flanges 61 and 62 and the U-shaped iron, 60, a socket 31, fixed to the flanges 61 and 62, by means of screws not shown.
  • This ferrite circulator was manufactured, according to the characteristics to be obtained in order to carry out the adaptation of the circuit to be adapted which was mentioned above; for this, the choice fell first on an existing circulator having characteristics fairly close to those to be obtained, then, after successive tests, the circulator described with the aid of FIGS. 5 and 6 was produced.
  • the invention is not limited to the example described; in this way, in particular, it is possible, in the assembly according to FIG. 3, to remove the impedance transformer 22, that is to say, practically the branch 42 of the ribbon 4 (see FIG. 5) , then it suffices to give R the value presented, at resonance, by the corresponding output of the resonator.
  • the circulator can be used as an adaptation element of a circuit to be adapted, not only on the input of the circuit, as in the example described, but also on the output of the circuit; thus the same circulator can serve as an adaptation element for two circuits to be adapted: a first circuit to be adapted having its output coupled to one of the ports of the circulator and a second circuit to be adapted having its input coupled to another port of the circulator.

Landscapes

  • Non-Reversible Transmitting Devices (AREA)
  • Microwave Amplifiers (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Claims (2)

1. Vorrichtung zur Anpassung und Isolierung und zur Ankopplung eines an einem Verzweigungspunkt (A) anzupassenden Kreises (1), mit einem dreiarmigen Ferritzirkulator (41, 42, 43), der aus einer Metallplatte mit einer Resonatorscheibe besteht, um die herum die drei Arme im gegenseitigen Winkel von 120° angeordnet sind, wobei der erste Arm an diesen Verzweigungspunkt (A), der zweite Arm an einen Vorspannungswiderstand (R) und der dritte Arm an den anzupassenden Kreis angeschlossen ist, dadurch gekennzeichnet, daß die Metallplatte im Inneren einer Struktur liegt, die von zwei zu beiden Seiten der Platte verlaufenden Masseebenen gebildet wird, daß der erste und der zweite Arm (41, 42), deren Länge im wesentlichen einer Viertelwellenlänge der Welle im Zirkulator bei Mittenfrequenz entspricht, wesentlich länger sind als der dritte Arm (43), der nur als Bezugspunkt für den Anschluß an den anzupassenden Kreis dient, und daß der Zirkulator so ausgewählt ist, daß der reelle Impedanzteil seines dritten Arms gleich dem reellen Impedanzteil des anzupassenden Kreises ist und daß die Überspannungskoeffizienten dieser Impedanzen dieselben sind.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Zirkulator zu beiden Seiten eines Bandes (4) zwei bezüglich des Bandes (4) symmetrische Strukturen aufweist, die bezüglich des Bandes enthalten:
- eine Ferritscheibe (51, 52), deren Durchmesser im wesentlichen dem Durchmesser der Resonatorscheibe (40) gleicht, und ein Siliziumoxidbauteil (53, 54), das nahezu den ganzen Bereich des Bandes (4) außerhalb der Scheibe (40) bedeckt, wobei die Ferritscheibe (51, 52) ein zentrales Loch besitzt;
- eine Wange (61, 62) aus Aluminium, die die Masseebene darstellt und auf ihrer dem Band (4) abgewandten Seite eine kreisförmige Höhlung gegenüber den Ferritscheiben (51, 52) besitzt;
- eine dünne Luftschicht (71, 72), ein Scheibchen (81, 82) und einen Permanentmagnet (91, 92), die in dem kreisförmigen Hohlraum liegen;
- eine U-Schiene (60), die mit ihren beiden Schenkeln die diesen gegenüberliegende Magnete (91, 92) bedeckt;
- und einen isolierenden zylindrischen Stift (45), der die Löcher in dem Band (4) und in den Ferritscheiben (51, 52) durchquert, um so die Bauteile zueinander in Stellung zu halten.
EP19830401483 1982-07-27 1983-07-19 Anpassungs- und Einweganordnung mit Ferritzirkulator Expired EP0100274B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8213105 1982-07-27
FR8213105A FR2531272B1 (fr) 1982-07-27 1982-07-27 Dispositif d'adaptation et d'isolement comportant un circulateur a ferrites

Publications (2)

Publication Number Publication Date
EP0100274A1 EP0100274A1 (de) 1984-02-08
EP0100274B1 true EP0100274B1 (de) 1989-03-22

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EP19830401483 Expired EP0100274B1 (de) 1982-07-27 1983-07-19 Anpassungs- und Einweganordnung mit Ferritzirkulator

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EP (1) EP0100274B1 (de)
JP (1) JPS5941901A (de)
CA (1) CA1212731A (de)
DE (1) DE3379494D1 (de)
FR (1) FR2531272B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116259944B (zh) * 2023-02-22 2024-01-30 东南大学 一种基于宇称时间对称原理的环形器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3651430A (en) * 1964-10-06 1972-03-21 Fujitsu Ltd Strip-line circulator having movable compensating stub strip overlying central strip-line conductors
DE2253175A1 (de) * 1972-10-30 1974-05-09 Siemens Ag Zirkulator mit in mic-technik ausgebildeten anschlussarmen
US3935548A (en) * 1974-06-04 1976-01-27 The Washington University Wide-band microwave circulator
DE3034034C2 (de) * 1980-09-10 1985-07-18 Siemens AG, 1000 Berlin und 8000 München Y-Zirkulator in Streifenleitungsbauweise

Also Published As

Publication number Publication date
FR2531272A1 (fr) 1984-02-03
FR2531272B1 (fr) 1985-09-13
CA1212731A (en) 1986-10-14
JPS5941901A (ja) 1984-03-08
EP0100274A1 (de) 1984-02-08
DE3379494D1 (en) 1989-04-27

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