KR100527920B1 - Isolator and manufacturing method thereof - Google Patents

Abstract

The disclosed invention includes a base plate having at least one fastener formed thereon; A housing having a receiving groove and a receiving space formed by pressing a press device, which is caulked with the base plate, and has three receiving portions in an arc shape bent outwardly at a predetermined interval; An isolator component comprising a first resonator, a circulator, a second resonator, a permanent magnet, a pole piece, and a resistor, which are sequentially stacked and accommodated in the housing space of the housing; A cap that is fastened to the housing of the housing and protects the isolator component, and the housing of the housing is provided with a protrusion on the outside, and a protrusion is formed along the inner side of the cap, and then the housing and the cap are fastened. It relates to an isolator and a method of manufacturing the same, characterized in that not easily separated.

The isolator of this configuration and its manufacturing method are simpler than the existing manufacturing method, and the production speed is improved, which not only increases the output per unit time, but also eliminates the need for equipment such as the NC machine required for production. By reducing the cost, the production cost of the isolator can be lowered.

Description

Isolator and Manufacturing Method Thereof}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an isolator and a method for manufacturing the same, and more particularly, to an isolator and a method for manufacturing the same having a simple manufacturing process, high production efficiency, and low manufacturing cost.

In general, an isolator refers to a circuit in which a signal is transmitted irreversibly only in one direction, and is a kind of irreversible circuit. There are many structures that perform this function, but many methods of terminating one port of a circulator are used.

These isolators are classified into coaxial, drop-in, waveguide, and lumped elements according to their shape, and the dual coaxial type can be used from 20 Mhz to 40 GHz. And most commonly used.

Since the isolator is implemented as a circulator, which is a 3-port passive element in most cases, a main axis isolator using the circulator will be described here.

1A and 1B illustrate an operation of a three port circulator for implementing an isolator.

Referring to the figure, the signal input to port 1 (11) is output to port 2 (12), while the signal input to port 2 (12) is terminated to port 3 (13) due to resistance. Not only is it output from 11), but it is also cleanly removed from the matched termination using the same characteristic impedance resistor.

That is, FIG. 1A shows that the input signal input to the port 1 (11) is output to the port 2 (12), and FIG. 1B shows that the signal input to the port 2 (12) is terminated to the port 3 (13). will be.

The isolator using the circulator 10 is an irreversible circuit element used for device protection and impedance matching of a system and a terminal in a transmission terminal of a mobile communication base station and other wireless communication equipment.

The isolator using the circulator has directivity by using the irreversibility of the permanent magnet and ferrite (ferromagnetic material), and facilitates the frequency shift control. As systems in mobile communication, satellite communication, and millimeter wave have been miniaturized recently, miniaturization, weight reduction, and low cost of isolators are required. In particular, in terms of their characteristics, low insertion loss, high isolation, and wideband (wide) are required. bandwidth) is required.

In general, as shown in FIG. 2, a transmitting end of a wireless communication device includes a band pass filter 20, a power amplifier 21, an isolator 22, and an antenna 23 for passing a transmission band. A frequency band of a predetermined signal is passed through 20, and the passed signal is amplified through the power amplifier 21 and then transmitted through the antenna 23. At this time, when the reverse signal is input through the antenna 23 or the reflected wave of the transmitted signal is input, it may cause malfunction of the transmission equipment or damage of the power amplifier 21.

Therefore, the isolator 22 is generally used in the next stage of the power amplifier 21 to solve the above problem, and serves to block the reflected wave of the reverse signal or the transmission signal received from the antenna 23. do.

However, since the manufacturing cost of the isolator is high, the isolator is often omitted in many radio communication base stations, transmission terminals, and the like, and therefore, it is required to reduce the manufacturing cost.

3 shows an example of a case accommodating a conventional isolator.

Referring to the drawings, the isolator housing 31 has three arc-shaped accommodating portions 31 curved outward while forming the same radius of curvature, protruding upward from the base plate 30 at an arbitrary interval from each other. A circular storage space 30a opened, an input / output ground exposure space 30c and 30d opened laterally, and a register ground exposure space 30b are formed.

Referring to the assembling process of the isolator, the pole piece 32 is first seated in the storage space 30a formed in the base plate 30 of the isolator, and the first resonator 34 is placed on the pole piece 32. Then, the permanent magnet 33 is inserted between the side of the first resonator 34 and the inner peripheral surface of the storage space.

Thereafter, the input / output ground portions 35a and 35b and the resistor ground portion 35c of the circulator 35 are positioned at the corners of the first resonator 34 to be exposed to the corresponding exposure space of the isolator housing 31. 35 is stacked in the storage space 30a, and the second resonator 37 is stacked on the storage space 30a so as to correspond to the first resonator 34. In this state, after the other pole piece 32a and the cover 38 are sequentially placed, the tip of the housing part protruding from the upper cover 38 is pressed with a press, and the cover 38 is bent inwardly. It is a method in which it is fixed by being pressed at a predetermined pressure by the tip of the housing part and fixed by engaging the screw 39 to the screw hole 37.

However, in the above method, the first and second resonators 34 and 37 are directly magnetized by the permanent magnet 33 disposed in the lateral direction thereof, and are disposed outside the circulator 35 so that the permanent magnet 33 is disposed. Since the magnetization is indirectly caused by the pole pieces 32 and 32a magnetized by the magnetic poles, the magnetic force by the first and second resonators 34 and 37 is not generated uniformly over the entire surface. A problem has been caused, and the productivity of the isolator is reduced by separately processing the base plate 30 and the housing 31, and not only precision processing equipment is required for processing the base plate 30, but also its processing speed is slow. .

4 illustrates an isolator disclosed in Korean Patent Publication No. 2003-0041079.

Referring to the drawings, the first resonator 41, the circulator 43, the second resonator 41a, the pole piece 46, and the permanent magnet 44 are sequentially disposed in the storage space 49 of the isolator housing 40. And the cover 45 is fixed by the threads 45a and 47 formed on the outer circumferential surface of the cover 45 and the inner circumferential surface of the isolator housing 40 while covering the upper surface thereof. .

However, since the structure of the isolator is to process the base plate 48 and the housing 40 integrally in the processing of the housing 40, not only the processing is difficult and time-consuming, but also the cover 45 and Machining of the threads 45a and 47 for fastening the housing 40 is not easy, and the fastening also has a problem similar to that of the conventional manufacturing method.

Therefore, there is a need for a new type of isolator and a method of manufacturing the same that can solve the above problems.

SUMMARY OF THE INVENTION The present invention has been made in view of the above necessity, and an object of the present invention is to provide an improved isolator and a method for manufacturing the same, which are easy to process and low in processing cost in processing and manufacturing a case of an isolator.

In addition, another object of the present invention is to provide an isolator and a method of manufacturing the same to facilitate the assembly of the isolator quickly and easily.

In addition, another object of the present invention is that the coupling between the housing and the cap of the isolator is a fastening method by pressing from above rather than the conventional screwing method, it is possible to fasten and detach easily, without the need for a separate device for processing the thread It is to provide an isolator and a method for manufacturing the same that can reduce the manufacturing cost.

In addition, another object of the present invention is to manufacture the isolator case with a magnetic material of ferrous metal, the entire isolator case is magnetized by the permanent magnet, thereby not only to apply a uniform magnetic force to the resonator, but also to reduce the manufacturing cost The present invention provides an isolator and a method of manufacturing the same.

In order to achieve the above object, the present invention provides a base plate having at least one fastener formed thereon, and three receiving portions caulkingly coupled to the base plate and being curved outwardly. The housing comprises a housing having a receiving groove and a receiving space, and a first resonator, a circulator, a second resonator, a permanent magnet, a pole piece, and a resistor, which are sequentially stacked and received in the housing space of the housing. and a cap coupled to the housing of the housing and protecting the isolator component.

In addition, the base plate, the housing and the cap is preferably made of ferrous alloys (Ferrous Alloys).

In addition, it is preferable that protrusions are formed on the outer side of the housing and protrusions are formed along the inner surface of the cap so that the housing and the cap are not easily separated after being fastened.

In addition, a plurality of the housing and the cap may be provided and coupled to one base plate.

In addition, the base plate, the housing and the cap is preferably plated with one of silver (Ag) plating, electroless nickel (Ni) plating and ternary alloy plating, the base plate, the housing and the cap using a mold It is preferable that it is formed by press working.

In addition, the manufacturing method of the isolator, the step of pressing the base plate, the housing and the cap, respectively, the step of joining the base plate and the housing by caulking, plating the caulked base plate, housing and cap And stacking and assembling isolator parts including a first resonator, a circulator, a second resonator, a pole piece, a permanent magnet, and a resistor in a storage space of the housing, and fastening a cap to the assembled housing. It is characterized by including.

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

FIG. 5 is a process diagram briefly illustrating the fabrication of an isolator and an assembling process of the isolator using the same according to an embodiment of the present invention.

Referring to the drawings, first, the processing steps (S51, S52, S53) for processing the base plate, the housing and the cap, respectively, into a press die, and the caulking step (S54) for joining the processed base plate and the housing by caulking. ), A plating step (S55, S56) for plating the caulked bonded base plate and the housing and the processed cap, an isolator component assembly step (S57) for stacking and assembling each isolator component in a storage space of the housing; Capping (S58) is a step of fastening the machined cap with the housing.

FIG. 6 is an assembled perspective view illustrating a step of joining the base plate and the housing manufactured by the process illustrated in FIG. 5 by pressing after press working.

Referring to the drawings, the housing 120 may receive the parts of the isolator 100 after cutting the sheet metal material to form the receiving grooves 140a, 140b, and 140c in which the three ports of the circulator 170 are accommodated. It is manufactured by bending to make a storage space 150.

The housing 120 has three arcuate portions 120a, 120b, and 120c in an arc shape that are bent outwardly while forming the same radius of curvature at intervals, and the accommodating space 150 has a circular shape open upward. It is processed to form a shape.

In addition, the base plate 110, like the housing 120, is made by cutting the iron plate material to a predetermined size, and then processed by a press, fastener 190 for mounting the isolator to the communication equipment Is formed.

In addition, the caulking step 54 (see FIG. 5) is a step of hermetically joining the housing 120 and the base plate 110 by tapping the caulking well or applying pressure by a press device.

The caulked bonded base plate 110, the housing 120, and the cap 130 are subjected to plating steps 55 and 56.

The plating step 55 (see FIG. 5) is a process of plating the parts by using a plating apparatus composed of a DC power supply, a plating bath (electrolyte), and an electrode, and includes corrosion resistance, hardness, abrasion resistance, and heat resistance to prevent corrosion. It is to improve.

This plating process is performed in each housing 120, base plate 110, and cap 130, which are made of steel or special steel, in which silver (Ag), nickel (Ni), or ternary alloy (zinc, copper, tin) Since the adhesiveness with the alloy) is not good, it is preferable to first plate before this final plating. This is called base plating, and electroless nickel plating before silver plating, copper plating before nickel plating, and electroless nickel plating before three-way alloy plating are generally performed.

In addition, the capping process (S58) is a process of fastening the housing 120 and the cap 130 by applying a constant pressure by a manpower or an automatic device, which is much easier and quicker than in the case of conventional screwing. It becomes possible.

7 is an assembled perspective view showing an embodiment of the isolator according to the present invention, and shows the isolator component assembly step and the capping step shown in FIG. 5.

Referring to the drawing, the assembling step 56 of the isolator component is a process of sequentially stacking the components of the isolator in the storage space of the housing 120.

In detail, the first resonator 160, the circulator 170, the second resonator 160a, and the pole pieces 180a and 180b, which are parts of the isolator, are accommodated in the housing space caulkingly coupled to the base plate. And permanent magnets 180 and the like are laminated in order.

That is, the isolator 100 has a circulator 170, which is a radio wave transmission medium made of a conductor material, is received in the accommodation space 150 of the housing 120, and is disposed above and below the radio wave to flow through the circulator 170. The first and second resonators (160, 160a) made of a ferrite material which serves to resonate and is a kind of ferromagnetic material is disposed, the permanent magnets 180 for supplying magnetic force to the resonators (160, 160a) and its permanent The pole pieces 180a and 180b of magnetic material, which are magnetized by the magnet 180 and serve to transmit a uniform magnetic force to the first and second resonators 160 and 160a, are sequentially stacked.

At this time, the three ports of the circulator 170 are an input grounding unit 140a, an output grounding unit 140b and a resistor grounding unit 140c, respectively, and a register 170d is connected to the register grounding unit 170c. The register 170d serves to terminate the signal when the signal is input in the opposite direction from the output grounding unit 170b of the isolator 100.

150a in the figure shows the joint by caulking.

FIG. 8 is a cross-sectional view taken along line VII-VII of FIG. 7, illustrating a state in which a housing and a cap are fastened, and a structure in which isolator components are stacked is omitted.

Referring to the drawings, the cap 130 is made of a press mold mainly made of special steel, and the projections 131 are formed along the inner circumferential surface thereof.

In addition, the housing parts 120a, 120b, and 120c of the housing are formed to be bent outwardly to form protrusions 121 protruding outward from the upper side of the housing, thereby fastening with the protrusions 131 formed on the cap 130. do.

Therefore, once the capping step S58 (see FIG. 5) is performed, the cap 130 and the accommodating parts 120a, 120b, and 120c may not be easily separated without being intentionally separated, and thus may be stably coupled.

FIG. 9 is a perspective view illustrating an isolator that is assembled and capped according to the process of FIG. 5. FIG.

Referring to the drawings, the housing 120 in which the components of the isolator 100 are loaded is coupled to the cap 130, and the circulator is formed in the three receiving grooves 140a, 140b, and 140c formed in the housing 120. It can be seen that three ports of 170 protrude from each other.

At this time, the base plate 110, the housing 120 and the cap 130 is preferably made of iron-based alloys, such as general carbon steel or special steel, such as is manufactured by the magnetic material of the iron-based metal, isolator case 110 by a permanent magnet This is because the entire magnetization of the resonators 160 and 130a can be obtained by applying magnetization to the resonators 160 and 160a.

FIG. 10 is an exploded perspective view of an isolator according to another embodiment of the present invention, which is the same as the first embodiment of FIG. 7 except that the cap 132 has a cylindrical protrusion 134 and FIG. 11. ) Is different.

A fastening method of the cylindrical protrusion 134 and the cap 132 formed on the housing accommodating parts 120a, 120b, and 120c is illustrated in detail in FIGS. 11 and 12.

FIG. 11 is a cross-sectional view of a line VI-XI of the isolator shown in FIG. 10, and FIG. 12 is a plan view showing that the cap and the receiving portion of the isolator shown in FIG. 10 are coupled to each other.

Referring to the drawings, protrusions 121 are formed outwardly on upper portions of the housing accommodating parts 120a, 120b, and 120c, respectively, and the cap 132 is provided in the housing accommodating parts 120a, 120b, and 120c. After being placed on the top, the protrusions 121 of the housing accommodating parts 120a, 120b, and 120c are slidably coupled between the upper plate of the cap 132 and the cylindrical protrusions 134 formed thereunder.

That is, as shown in FIG. 12, the cap 132 is rotated in the direction of the arrow along the protrusion 121 formed to the outside of the housing accommodating parts 120a, 120b, and 120c, thereby sliding upward of the cylindrical protrusion 134. By being coupled to each other, the housing accommodating parts 120a, 120b, and 120c and the cap 132 are configured to be easily fastened or separated.

In this way, when the cap 132 is to be separated from the housing accommodating parts 120a, 120b, and 120c after assembling the isolator 100, the cap 132 may be more easily separated.

FIG. 13 is a perspective view showing another embodiment of the isolator 200 according to the present invention, and is a perspective view showing the isolator 200 in which the housing 220 and the cap 230 are processed and assembled by two.

Referring to the drawings, the base plate 210 is machined wider so that two housings 220 can be joined by caulking thereon, and two housings 220 are caulked thereon, the housing of each housing 220. The components of the isolator such as the permanent magnet 260, the pole piece 280, the circulator 270, and the like are loaded in the space 150 (see FIG. 7), and the cap 230 is fastened to the upper portion of each housing 220. Shows that

9 and 10 illustrate the fasteners for fastening the isolator to communication equipment.

As described above, a base plate having at least one fastener formed therein, a housing in which an accommodation groove and a storage space are formed at regular intervals, and three housing portions caulkingly coupled to the base plate and curved outwardly are formed at regular intervals; An isolator component including a first resonator, a circulator, a second resonator, a permanent magnet, a pole piece, and a resistor, which are sequentially stacked in a space, and a cap that is fastened to an accommodation part of the housing to protect the isolator component. The isolator and its manufacturing method provide the following effects.

First, the manufacturing method is simpler than the existing manufacturing method, and the production speed is improved, thereby increasing production per unit time, thereby lowering the production cost.

Second, since the processing equipment such as the NC machine required for production is reduced, the cost required for the production facility is reduced.

Third, the coupling between the housing and the cap is not a conventional screw coupling method, but is rotated by a method of fastening by means of protrusions formed along the outer surface of the housing and the cap of the housing or by a rotation protrusion installed on the outer peripheral surface of the housing housing. Since it is a coupling method, fastening and detaching are possible more easily and quickly.

Fourth, by manufacturing the isolator base plate, the housing and the cap with a magnetic material of ferrous metal, the entire isolator is magnetized by the permanent magnet, through which a uniform magnetic force is applied to the resonator, thereby improving its characteristics, Lower prices also allow for more popular use of the isolator.

It is to be understood that the invention is not limited to that described above and illustrated in the drawings, and that more modifications and variations are possible within the scope of the following claims.

1A and 1B are schematic diagrams showing the function of a circulator, which is a core component of an isolator.

2 is a conceptual diagram showing the arrangement of a transmitter in wireless communication.

3 is an assembled perspective view of an isolator according to the prior art.

4 is an assembled perspective view of another isolator according to the prior art.

5 is a process chart showing a manufacturing process of an isolator according to an embodiment of the present invention.

6 is an assembled perspective view showing the caulking step shown in FIG.

FIG. 7 is an exploded perspective view illustrating an example of a component assembly step and a capping step of the isolator after the plating step illustrated in FIG. 5.

FIG. 8 is a cross-sectional view taken along line VII-VII of FIG. 7 illustrating a state in which the housing and the cap are fastened.

FIG. 9 is a perspective view illustrating the isolator completed assembling and capping shown in FIG. 7.

10 is an exploded perspective view showing an isolator according to another embodiment of the present invention.

FIG. 11 is a cross-sectional view taken along the line VI-XI of the isolator shown in FIG. 10. FIG.

FIG. 12 is a plan view illustrating coupling of a cap and a receiving unit of the isolator shown in FIG. 10.

13 is a perspective view illustrating an isolator according to still another embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100, 200: isolator 110, 210: base plate

120, 220: housing 120a, 120b, 120c: housing

121, 131: projection 130, 230, 132: cap

140a: receiving groove for input ground 140b: receiving groove for output ground

140c: register receiving groove 150: storage space

150a: junction part 160 by caulking, 260: first resonator

160a, 260a: second resonators 170, 270; Circulator

170a: input ground portion 170b: output ground portion

170c: resistor ground portion 170d: resistor

180, 280: permanent magnet 180a, 180b: pole piece

190, 290: Isolator Fastener

Claims (8)

A base plate having at least one fastener formed thereon; A housing having a receiving groove and a receiving space formed by pressing a press device, which is caulked with the base plate, and has three receiving portions in an arc shape bent outwardly at a predetermined interval; An isolator component including a first resonator, a circulator, a second resonator, a permanent magnet, a pole piece, and a resistor, which are sequentially stacked and accommodated in an accommodation space of the housing; A cap coupled to a housing of the housing to protect the isolator component, The housing of the housing is formed with protrusions on the outside, the projection is formed along the inner surface of the cap, isolator characterized in that the housing and the cap is not easily separated after being fastened. delete delete delete delete The method of claim 1, The base plate, the housing and the cap is isolator, characterized in that formed by the press working using a mold. A base plate having at least one fastener formed thereon; A housing having a receiving groove and a receiving space formed by pressing a press device, which is caulked with the base plate, and has three receiving portions in an arc shape bent outwardly at a predetermined interval; An isolator component including a first resonator, a circulator, a second resonator, a permanent magnet, a pole piece, and a resistor, which are sequentially stacked and accommodated in an accommodation space of the housing; A cap coupled to a housing of the housing to protect the isolator component, Isolator, characterized in that the projection is formed in the outer side of the housing and the cylindrical projections curved along the inner circumferential surface of the cap, the projection formed on the outer side of the cylindrical projection and the housing housing. A machining step of press working the base plate, the housing and the cap, respectively; A caulking step of joining the base plate and the housing by caulking; Plating the caulked base plate, the housing and the cap; An assembly step of sequentially stacking and assembling isolator components including a first resonator, a circulator, a second resonator, a pole piece, a permanent magnet, and a resistor in a housing space of the housing; And a capping step of caulking the cap by applying pressure to the assembled housing.