KR100457061B1 - Isolator - Google Patents

Abstract

The present invention relates to an isolator, which is an irreversible transmission circuit element, wherein an isolator housing having integrally formed storage portions in a base is made of a conductor, and the first and second resonators, a permanent magnet, a pole piece, and a cover are made in a disc shape, and isolator. The first resonator, the center conductor, the second resonator, the pole piece and the permanent magnet are sequentially stacked in the storage space of the housing, and the cover is fixed to the isolator housing while covering the upper surface of the permanent magnet, thus reducing the number of parts and assembling work. Simple and convenient, the internal magnetic field environment is more appropriate to improve the irreversible transmission function.

Description

Isolator

The present invention relates to an isolator, to reduce the number of parts, to simplify and convenient parts assembly work, and to an isolator is improved its function due to the effective magnetic environment composition.

In the isolator used as a microwave or light transmission circuit, electromagnetic waves are transmitted in one direction of the transmission line, but transmission of electromagnetic waves in the opposite direction is blocked. Thus, an irreversible transmission circuit element is used. It is called 傳送 回路 불리 子).

This isolator uses the large Faraday rotation angle of the magnetic body, which is a phenomenon in which electromagnetic waves propagating in parallel with the magnetic field rotate the polarized plane slowly in the magnetic body where the magnetic field acts. If the direction of the electromagnetic wave is exactly opposite to each other, the polarization plane rotates in the opposite direction as the electromagnetic wave progresses, so that the electromagnetic wave is transmitted only in one direction.

The isolator includes a center conductor, which is a radio wave transmission medium made of a conductor material; A first and second resonator made of ferrite material which resonates a radio wave flowing through the center conductor while wrapping the center conductor in a sandwich form; Permanent magnets supplying magnetic force to the first and second resonators; A pole piece made of a magnetic material which is magnetized by a permanent magnet and transmits a uniform magnetic force to the first and second resonators; An isolator housing made of a nonmagnetic material in which these components are housed; A cover made of a magnetic material that keeps the magnetic field formed around the center conductor constant while sealing the components in the isolator housing; It consists of a resistor that converts the return radio waves from the center conductor into thermal energy and radiates heat to the outside.

When the operation state thereof is described in more detail, since the magnetic force from the permanent magnet is uniformly transmitted to the first and second resonators through the pole piece, a constant magnetic field is formed in the center conductor by the first and second resonators. In this state, when the radio wave passes through the center conductor, the radio wave flows in only one direction of the center conductor due to the Faraday rotation angle effect by the first and second resonators. On the other hand, the return propagation from the propagation output terminal connection portion of the center conductor is led to a resistor, converted into thermal energy, and then radiated to the atmosphere and disappears.

As all the products are being researched and developed in order to improve the function and miniaturization with the development of technology, there are various ways to improve the irreversible transmission characteristics and reduce the volume of the isolator. Is already widely used.

1 and 2, the isolator housing 10 is formed from the base 11 while having three arcuate receiving portions 12a, 12b, 12c, which are bent outward while forming the same radius of curvature, at random intervals from each other. Protruding upward, the circular housing space H1 opened upward, the input and output ground exposed space (H2, H3) and the register ground exposed space (H4) opened in the lateral direction is formed. . In addition, the pole pieces 61 and 62 and the cover 70 are manufactured in a disc shape, the diameter of which is slightly smaller than the inner diameter of the storage space H1 so as to be closely inserted into the storage space H1 in consideration of the tolerance. The first and second resonators 120 and 140 are manufactured in the form of a plate having a substantially triangular shape. In addition, the permanent magnets (151, 152, 153) are made of three separate objects, so that the permanent magnets (151, 152, 153) are fitted between each side of the first and second resonators (120, 140) and the inner circumferential surface of the storage space (H1), the inside The face is straight and the outer face is arc shaped. On the other hand, the center conductor 30 is manufactured in the form of a plate of approximately Y shape, each end thereof is an input grounding portion 31, an output grounding portion 32 and a register grounding portion (33).

The assembly operation thereof will be described. First, the pole piece 61 is seated in the storage space H1 of the isolator housing 10, and the first resonator 120 is placed on the pole piece 61. Permanent magnets 151, 152 and 153 are inserted between the side portions of the 120 and the inner circumferential surface of the storage space H1 so that the lower ends of the permanent magnets 151, 152 and 153 are fitted into and fixed. At this time, the corner portion of the first resonator 120 is disposed to face the exposed spaces (H2, H3, H4) of the isolator housing (10). Subsequently, the input / output ground portions 31 and 32 and the register ground portion H4 of the center conductor 30 are positioned at the corners of the first resonator 120 so that the corresponding exposure spaces H2 of the isolator housing 10 are formed. The center conductor 30 is stacked in the storage space H1 so as to be exposed to H3 and H4, and the second resonator 140 is stacked to correspond to the first resonator 120 so that the permanent magnets 151, 152 and 153 are disposed thereon. The side of the second resonator 140 is fitted to the inner surface of the close contact. At this time, since the thickness of the permanent magnets (151, 152, 153) is equal to the total thickness of the sum of the thickness of the first and second resonators (120,140) and the center conductor 30, the upper surface of the permanent magnets (151, 152, 153) and the upper surface of the second resonator (140) Arranged on the same line. In this state, the pole pieces 62 and the cover 70 are sequentially placed on the permanent magnets 151, 152, 153 and the second resonator 140, and then the receiving parts 12a, which protrude upward from the cover 70, are disposed. 12b, 12c) is pressed by a press so that the cover 70 is firmly fixed while being pressed at a predetermined pressure by the ends of the receiving portions 12a, 12b, 12c that are bent inwardly (see FIG. 2).

According to the present embodiment, since the permanent magnets 151, 152 and 153 are disposed laterally in contact with the side portions of the first and second resonators 120 and 140, which form a triangular plate, the overall thickness of the isolator is thinned. .

However, according to the present embodiment, the first and second resonators 120 and 140 are directly magnetized by the permanent magnets 151, 152 and 153 disposed in the lateral direction thereof, and are disposed outside the center conductor 30 so as to be disposed outside. Since it is indirectly magnetized by the pole pieces 61 and 62 magnetized by the 151, 152 and 153, the magnetic force by the first and second resonators 120 and 140 is not generated uniformly over the entire surface, and thus the irreversible transmission function is deteriorated. Was caused.

In addition, conventionally, in order to increase the cooling effect of the isolator, since the isolator housing 10 is manufactured from aluminum that is nonmagnetic and excellent in thermal conductivity, the magnetic field environment around the center conductor 30 is not properly formed. .

Furthermore, in the present embodiment, since the permanent magnets 151, 152 and 153 are separated into three parts, the number of parts increases, and the work of assembling and arranging the first and second resonators 120 and 140 and the center conductor 30 to each other is quite cumbersome. Difficulty caused a problem that the productivity is greatly reduced.

On the other hand, in order to more appropriately create a magnetic field environment of the center conductor 30 has been proposed as shown in Figs. 3 and 4, according to this, three receiving members (91,92) forming the storage space (H1) (93) is made of a magnetic material separate from the isolator housing base (11).

The receiving members 91, 92, and 93 are fixed in all directions by the components 30, 61, 62, 70, 120, 140, 151, 152, and 153 stored in the storage space H1 while being fitted to the upper surface of the base 11. The cover 70 and the receiving members 91, 92, and 93 are firmly fixed in the vertical direction through a separate fastening member S such as a screw fastened to the base 11 (see FIG. 4).

According to this embodiment, the magnetic field environment around the center conductor 30 is appropriately formed by the receiving members 91, 92, and 93 made of a magnetic material such as iron.

However, in the case of this embodiment, the number of parts and the number of assembly work is further increased, and the assembly work becomes more cumbersome and difficult.

In addition, as mentioned in the embodiment illustrated in FIGS. 1 and 2, the magnetic force transmission to the first and second resonators 120 and 140 is performed directly or indirectly so that the magnetic force from the first and second resonators 120 and 140 is not uniform. The problem still remains.

Accordingly, the present invention has been invented to solve the above problems, the number of parts is reduced, the assembly operation is simple and convenient, and the internal magnetic environment is made more appropriately to provide an isolator is improved irreversible transmission function There is a purpose.

1 is a partial exploded perspective view showing an example of a conventional isolator,

FIG. 2 is an assembled cross-sectional view of the isolator shown in FIG. 1;

3 is a partial partial perspective view showing another example of a conventional isolator;

4 is an assembled perspective view of the isolator shown in FIG. 3;

5 is a partial partial perspective view of the isolator according to the present invention;

FIG. 6 is an assembled cross-sectional view of the isolator shown in FIG. 5.

-Explanation of terms for the main parts of the accompanying drawings-

10; Isolator housing, 10a; Thread,

11; Base, 11a; Resistor seating groove,

11b; Housing fastening grooves, 12a, 12b, 12c; Receiving,

20; A first resonator, 30; Center conductor,

31; Input grounding section 32; Output ground,

33; A register ground portion 40; 2nd resonator,

50; Permanent magnets, 61,62; Pole Piece,

70; Cover, 71; Thread,

80; Register, H1; Storage Space,

H2; Input ground exposure space, H3; Output ground exposure space,

H4; Register ground exposed space.

The present invention for achieving the above object, the center conductor which is a radio wave transmission medium of a conductor material; A first and second resonator made of ferrite material which resonates a radio wave flowing through the center conductor while wrapping the center conductor in a sandwich form; Permanent magnets supplying magnetic force to the first and second resonators; A pole piece made of a magnetic material which is magnetized by a permanent magnet and transmits a uniform magnetic force to the first and second resonators; Three arc-shaped accommodating parts bent outward while forming the same radius of curvature, protruding upward from the base at an arbitrary interval from each other to expose a circular accommodating space opened upward, and an input / output ground part opened laterally. An isolator housing formed with a space and an exposed portion of the register ground portion; A cover made of a magnetic material which seals the components in the storage space of the isolator housing and keeps the magnetic field environment formed around the center conductor constant; Consists of a resistor for converting the return radio waves from the center conductor to heat energy to radiate heat to the outside, wherein the isolator housing is made of a magnetic material while the receiving parts are integrally formed in the base, and the first and second resonators, permanent magnets, pole pieces and The cover is manufactured in a disc shape, and the first resonator, the center conductor, the second resonator, the pole piece and the permanent magnet are sequentially stacked in the storage space of the isolator housing, and the cover is fixed to the isolator housing while covering the upper surface of the permanent magnet. In the isolator, a thread is formed on an outer circumferential surface of the cover, and a thread is formed on an inner circumferential surface of the upper end of the housing of the isolator housing, and the cover is screwed into the housing of the isolator housing.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

5 and 6 are diagrams illustrating an isolator according to the present invention, and the description thereof will be omitted while attaching the same reference numerals to the same parts as in FIGS. 1 to 4 showing the prior art.

5 and 6, the isolator according to the present invention includes a center conductor 30 which is a radio wave transmission medium of a conductor material; First and second resonators 20 and 40 made of ferrite, which resonate radio waves flowing through the center conductor 30 while wrapping the center conductor 30 in a sandwich form; Permanent magnets 50 for supplying magnetic force to the first and second resonators 20 and 40; A pole piece 61 made of a magnetic material which is magnetized by the permanent magnet 50 and transmits a uniform magnetic force to the first and second resonators 20 and 40; Three accommodating portions 12a, 12b, and 12c in the shape of arcs bent outward while forming the same radius of curvature protrude upward from the base 11 at random intervals to each other and have a circular accommodating space H1 opened upwardly. ) And an isolator housing 10 in which the input / output ground exposure spaces H2 and H3 and the register ground exposure space H4 opened laterally are formed; A magnetic material that seals the components 20, 30, 40, 50, and 61 installed in the storage space H1 of the isolator housing 10 and maintains a constant magnetic field environment formed around the center conductor 30. A cover 70 and; The return wave from the center conductor 30 is converted into thermal energy to form a structure consisting of a resistor (80) for radiating heat to the outside.

Note that the isolator housing 10 is made of a magnetic material while the receiving parts 12a, 12b, and 12c are integrally formed on the base 11, and the first and second resonators 20 and 40 and the permanent magnets. 50, the pole piece 61, and the cover 70 are manufactured in a disc shape, and the first resonator 20, the center conductor 30, and the second resonator are disposed in the storage space H1 of the isolator housing 10. 40, the pole piece 61 and the permanent magnet 50 are sequentially stacked, and the cover 70 is fixed to the isolator housing 10 while surrounding the upper surface of the permanent magnet 50. The diameters of the disk-shaped components 20, 30, 40, 50, 61, 70 easily fit these components 20, 30, 40, 50, 61, 70 into the storage space H1. As long as it can be accommodated, it is made to be equal to the inner diameter of the storage space H1 as much as possible.

According to the present invention, since the isolator housing 10 is made of magnetic material and the entire isolator housing 10 is magnetized by the permanent magnet 50, even if a separate pole piece is not inserted into the bottom of the first resonator 20, The magnetic force from the permanent magnet 50 is applied to the first resonator 20 through the isolator housing 10. In addition, the magnetic force from the permanent magnet 50 is indirectly and uniformly applied to the second resonator 40 through the pole piece 61 and the isolator housing 10.

Therefore, all parts except the lateral exposure spaces H2, H3, H4 of the isolator space 10, ie, the isolator housing 10 remain magnetized, so that the center conductor 30 and the first and second resonators are maintained. An effective magnetic environment is created around (20,40). In addition, since the magnetic force from the permanent magnet 50 is uniformly applied through the isolator housing 10 and the pole piece 61, the irreversible transmission function of the isolator is greatly improved.

Furthermore, the cover 70 located at the top of each of the components 20, 30, 40, 50, 61, 70 is stacked in the storage space H1 of the isolator housing 10. By fixing the components 20, 30, 40, 50, 61, and 70 to be firmly installed in the storage space H1, the isolator assembly work is very simple and easy.

In the present embodiment, the thread 71 is formed on the outer circumferential surface of the cover 70, and the corresponding thread 10a is formed on the inner circumferential surface of the upper ends of the accommodating portions 12a, 12b, and 12c of the isolator housing 10, The cover 70 is detachably fastened to the receiving portions 12a, 12b, and 12c of the isolator housing 10.

As such, when the cover 70 is directly threaded to the receiving portions 12a, 12b, and 12c of the isolator housing 10, the parts that can be generated during the assembly work are suppressed as much as possible, There is an advantage to be advantageous.

In more detail, when the cover 70 is fixed by bending the accommodating portions 12a, 12b, and 12c of the isolator housing 10, as shown in FIG. When the upper ends of the receiving parts 12a, 12b, and 12c are excessively pressed by mechanical tolerances, the components 20, 30, 40, 50, 61, and 70 installed in the storage space H1 are deformed or damaged. As a result, product defects increase or product reliability greatly decreases. In order to solve this problem, since a press device with high precision is required, the installation cost for the production of the product is greatly increased, resulting in an increase in the product cost and a problem in that a small quantity production of a large variety of products is virtually impossible.

On the other hand, as shown in Figure 4, in the case of using a separate fastening member, such as a separate screw (S), the deformation and breakage of parts due to excessive pressure is prevented as much as possible, rather than the method using the press device in small quantities There is an advantage in the production, but the use of the fastening member (S) causes a problem that the number of parts and assembly labor is increased.

However, as in the embodiment according to the present invention, when the cover 70 is screwed directly to the receiving portions 12a, 12b, 12c of the isolator housing 10, the operator adjusts the torque to the respective components ( 20,30,40,50,61,70 can be insulted to the isolator housing 10 at a suitable pressure, so that the deformation and damage of parts due to excessive pressure can be reduced as much as possible, and a separate fastening member (S) Since there is no need to use, the number of parts and assembly labor is greatly reduced.

Meanwhile, the pole piece 61 may be reinforced at an appropriate position according to the size and capacity of the transmission frequency. For example, as shown in FIG. 5, the pole piece 62 in the form of a disc is reinforced between the permanent magnet and the cover. Although not shown, the pole-shaped pole piece may be reinforced between the first resonator 20 and the bottom of the storage space H1 of the isolator housing 10.

According to the present invention as described above, the isolator housing is integrally formed in the base is made of a conductor, the first and second resonator and the permanent magnet, pole piece and cover is made in a disc shape, the housing of the isolator housing The first resonator, the center conductor, the second resonator, the pole piece and the permanent magnet are sequentially stacked in the space, and the cover is fixed to the isolator housing while covering the upper surface of the permanent magnet, thus greatly reducing the number of parts and simplifying the assembly work. Productivity is greatly improved as it is convenient, and there is an effect that can reduce the product cost.

In addition, the magnetic field environment is effectively formed around the center conductor and the first and second resonators, and the magnetic force from the permanent magnet is evenly transmitted to the first and second resonators through the isolator housing and the pole piece, thereby greatly improving the irreversible transmission function of the isolator. It is effective.

On the other hand, if the cover is screwed into the housing of the isolator housing, it is advantageous for mass production of small props, prevent damage to the components due to excessive pressure, there is an effect that further reduces the number of parts and assembly labor.

The present invention is not limited to the above embodiments, and of course, various modifications can be made without departing from the scope of the following claims.

Claims (3)

A center conductor 30 which is a radio wave transmission medium of a conductor material; First and second resonators 20 and 40 made of ferrite, which resonate radio waves flowing through the center conductor 30 while wrapping the center conductor 30 in a sandwich form; Permanent magnets 50 for supplying magnetic force to the first and second resonators 20 and 40; A pole piece 61 made of a magnetic material which is magnetized by the permanent magnet 50 and transmits a uniform magnetic force to the first and second resonators 20 and 40; Three accommodating portions 12a, 12b, and 12c in the shape of arcs bent outward while forming the same radius of curvature protrude upward from the base 11 at random intervals to each other and have a circular accommodating space H1 opened upwardly. ) And an isolator housing 10 in which the input / output ground exposure spaces H2 and H3 and the register ground exposure space H4 opened laterally are formed; A magnetic material that seals the components 20, 30, 40, 50, and 61 installed in the storage space H1 of the isolator housing 10 and maintains a constant magnetic field environment formed around the center conductor 30. A cover 70 and; The resistor 80 converts the return radio waves from the center conductor 30 into heat energy and radiates heat to the outside, wherein the isolator housing 10 includes the receiving portions 12a, 12b, and 12c integrally formed on the base 11. The first and second resonators 20 and 40, the permanent magnet 50, the pole piece 61, and the cover 70 are manufactured in a disc shape, and the storage space of the isolator housing 10 ( The first resonator 20, the center conductor 30, the second resonator 40, the pole piece 61, and the permanent magnet 50 are sequentially stacked on the H 1), and the cover 70 is the permanent magnet 50. In the isolator fixed to the isolator housing 10 while wrapping the upper surface of the, A thread 71 is formed on the outer circumferential surface of the cover 70, and a corresponding thread 10 a is formed on the inner circumferential surface of the upper ends of the accommodating portions 12a, 12b, and 12c of the isolator housing 10, so that the cover 70 is formed. An isolator characterized in that it is screwed into the receiving portions (12a, 12b, 12c) of the isolator housing (10). The disk piece of claim 1, wherein the permanent magnet 50 and the cover 70 and / or between the first resonator 20 and the bottom of the storage space H1 of the isolator housing 10 are formed. Isolator characterized in that the reinforcement. delete.