KR100550843B1 - Miniaturized laminated balance filter - Google Patents

Abstract

It is an object of the present invention to provide an ultra-slim stack type balanced filter.

The present invention relates to a compact multilayer balanced filter in which a plurality of dielectric sheets are stacked, wherein the first and second resonant lines formed on the first dielectric sheet, and the third and second dielectric sheets formed on the second dielectric sheet stacked below the first dielectric sheet. And a fourth resonant line, each of the resonant lines including a capacitive portion having a wide line width and an inductive portion having a narrow line width, wherein the first capacitive portion, the first inductive portion, and the second capacitive portion have a narrow line width. The sieve portion and the second inductive portion are arranged side by side, each of the inductive portions is formed of a non-linear strip line, and the upper and lower corresponding inductive portions are electrically connected to each other. In this case, the first, third and second resonant lines and the second and fourth resonant lines respectively operate as λ / 2 resonators, and at the same time, are spaced apart from each other by the same distance from the position where the second and fourth inductive portions are connected. A balanced signal having a phase difference of 180 ° at the point can be output.

 According to the present invention, a helical structure is used as the basic shape of the resonator, and at the same time, a stepped resonator having different line widths of the capacitive portion and the inductive portion can be used to manufacture a micro filter, and according to the arrangement of the resonators There is an effect that can easily control the filter characteristics

Stacked, Balun, Filter, Balanced, Dielectric Sheet

Description

Miniature Stacked Balance Filters {MINIATURIZED LAMINATED BALANCE FILTER}

1 is an external perspective view of a conventional balanced filter.

FIG. 2 is an exploded perspective view of the balance filter of FIG. 1. FIG.

3 is an external perspective view of a balanced filter according to the present invention.

4 is an exploded perspective view of a balanced filter according to a first preferred embodiment of the present invention.

5 is a perspective view illustrating a spatial structure of the balance filter of FIG. 4.

6 is an exploded perspective view of a balanced filter according to a second preferred embodiment of the present invention.

FIG. 7 is a perspective view illustrating a spatial structure of the balance filter of FIG. 6.

8A and 8B are equivalent circuit diagrams of the balanced filters of FIGS. 4 and 6, respectively.

Explanation of symbols on the main parts of the drawings

ST1, ST2, ST3A, ST3B, ST4-ST7: Dielectric Sheet

40: ultra-small stacked balanced filter 41, 51: first resonance line

41A, 51A: first capacitive section 41B, 51B: first inductive section

42, 52: second resonance line 42A, 52A: first capacitive part

42B, 52B: first inductive part 43, 53: third resonance line

43A, 53A: first capacitive portion 43B, 53B: first inductive portion

44,54: fourth resonant line 44A, 54A: first capacitive part

44B, 54B: first inductive part INE: unbalanced input electrode

OUT1E, OUT2E: Balanced output electrodes H1, H2: First and second conductive via holes

The present invention relates to an ultra-compact multilayer balanced filter applicable to a wireless LAN, a Bluetooth module, a wireless communication terminal, and the like, in particular, simultaneously implementing a filter and a balun function using a λ / 2 resonator. In this case, a part of the stripline of the resonator is spirally formed, and at the same time, by using a stepped resonator having different line widths of the capacitive and inductive portions, it is possible to manufacture a micro filter and filter characteristics according to the arrangement of the resonators. The present invention relates to a micro stack type balanced filter that can be easily controlled.

In general, dielectric filters are strongly required to be small and high performance due to the development of mobile communication, and dielectric filters suitable for satisfying such requirements are widely used. Such dielectric filters are used, for example, in the microwave band from several hundred MHz to approximately 5 GHz, but are actually mounted on circuit boards and used in communication devices, especially mobile phones. For this reason, many dielectric ceramic filters are particularly suitable for miniaturization and thinning.

Balun is an abbreviation of 'Balance to Unbalance' and refers to a circuit or structure that converts a balanced signal into an unbalanced signal or conversely converts an unbalanced signal into a balanced signal. For example, in the wireless signal processing circuit, a component made of a balanced line such as a mixer or a SAW filter is used, and when such a component is connected to a component composed of an unbalanced line such as an amplifier, It requires a balloon-like structure.

If the filter product and the balun function are required at the same time, the filter using the λ / 2 or λ / 4 resonator and the balun transformer using the λ / 2 or λ / 4 transmission line should be implemented simultaneously. In terms of miniaturization, the research and development of the balanced filter in which the filter and the balun are implemented on one chip has been actively conducted.

As an example of such a balanced filter, the balanced filter disclosed in JP-A-11-317603 will be described with reference to FIG. 1.

FIG. 1 is an external perspective view of a conventional balanced filter. Referring to FIG. 1, a pair of input electrodes E1 and E2 and a pair of output electrodes E3 and E4 are provided at both sides of a conventional filter 1. ) Are formed and become the input terminals 11 and 12 and the output terminals 13 and 14, respectively. On the other outer side, ground electrodes E5 and E6 are exposed as ground terminals.

FIG. 2 is an exploded perspective view of the balance filter of FIG. 1. Referring to FIG. 2, a conventional balance filter is formed of a laminate formed of seven layers of dielectric ceramic sheets S1-S7, and the two ceramics. On the sheets S4 and S5, two strip line type resonators 21 and 22 divided up and down are arranged. The strip line-type resonators 21 and 22 divided up and down are formed in a symmetrical structure with the strip lines facing each other. Each of the resonators 21 and 22 has a straight line in which the wide line portions 21a, 21b, 22a and 22b and the narrow line portions 21c, 21d, 22c and 22d are combined in a straight line. . At this time, the input signals to the pair of input terminals E1 and E2 are applied to the pair of upper and lower resonators 21 and 22, respectively, and are filtered by a certain range of frequencies by the respective resonators 21 and 22. The filter signal with phase difference is output through the output terminal.

In such a conventional balanced filter, the balanced signal can be output by the symmetrical structure of the resonator. However, in the conventional balanced filter, since the strip lines in which the wide track portions 21a, 21b, 22a, and 22b and the narrow track portions 21c, 21d, 22c, and 22d are combined have two parallel structures, respectively, The conventional resonator has a shorter electrical length than the spiral resonator proposed in the present invention, and inductive coupling and capacitive coupling always coexist in the resonance period, thereby limiting the coupling control of the resonance period.

That is, it is necessary to control the capacitance or inductance coupling between the resonators to suit different characteristics according to the relationship with the product or the peripheral circuit to which the characteristic required for the filter is applied. However, in the conventional balanced filter structure, it occurs between the resonators. There is a limit in the control of capacitance or inductance coupling.

The present invention has been proposed to solve the above problems, the object of which is to implement a filter and balun function by using a λ / 2 resonator at the same time, to form a portion of the stripline of the resonator in a spiral, at the same time the capacitance By using a stepped resonator having different line widths between the inductive and inductive sections, it is possible to manufacture a miniaturized filter, and to provide a miniaturized multilayer balanced filter that can easily control filter characteristics according to the arrangement of the resonators.

In order to achieve the above object of the present invention, the ultra-compact multilayer balanced filter of the present invention

In the ultra-slim multilayer balanced filter in which a plurality of dielectric sheets are stacked,

A first resonance portion formed on the first dielectric sheet and including a first capacitive portion formed of a wide strip line and a first inductive portion extending from the first capacitive portion to a narrow non-linear strip line; line;

A second capacitive portion formed on said first dielectric sheet, said second capacitive portion formed by a wide strip line and a second inductive portion extending from said second capacitive portion to a narrow non-linear strip line; Resonance line;

A third capacitive portion formed at a position corresponding to the first resonance line among the second dielectric sheets stacked below the first dielectric sheet and formed of a wide strip line, and from the third capacitive portion; A third resonant line extending into a narrow nonlinear strip line and including a third inductive part electrically connected to the first inductive part, the third resonant line forming a λ / 2 first resonator together with the first resonant line;

The second dielectric sheet is formed at a position corresponding to the second resonance line, and extends from the fourth capacitive portion to a narrow nonlinear strip line from the fourth capacitive portion. A fourth resonant line including a fourth inductive part electrically connected to the second inductive part and forming a λ / 2 second resonator together with the second resonant line; And

A balanced output terminal connected to the second and fourth capacitive parts spaced apart from each other by an equal distance from the electrically connected position between the second and fourth inductive parts,

The first capacitive part, the first inductive part, the second capacitive part, and the second inductive part may be arranged side by side.

In addition, considering the characteristics of the balanced filter of the present invention, the first and second capacitive portions can be formed close to each other, and in this case, the capacitance between the first and second capacitive portions can be formed. In addition, the first and second inductive portions may be formed adjacent to each other, and in this case, the inductance between the first and second inductive portions may be formed.

In addition, a third dielectric sheet is laminated on at least one of an upper portion of the first dielectric sheet and a lower portion of the second dielectric sheet, and a portion of the first capacitive portion and a portion of the second capacitive portion of the third dielectric sheet. It is preferable to further include a coupling electrode formed of a strip line at a position overlapping with the control panel, and the capacitance formed between the first capacitive portion and the second capacitive portion may be controlled by the size of the overlapping area.

The fourth and fifth dielectric sheets may be stacked on the uppermost layer and the lowermost layer, respectively, and further include a ground electrode formed on the fourth and fifth dielectric sheets. The interference with the unnecessary signal that the balance filter of the present invention can receive from the outside can be blocked by the ground electrode.

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

3 is an external perspective view of the balanced filter according to the present invention. Referring to FIG. 3, the micro-stacked balanced filter 40 according to the present invention is formed by stacking a plurality of dielectric sheets, and an unbalanced input electrode therein. It includes an unbalanced input terminal IN connected to the balanced output terminal OUT1 and OUT2 and a ground terminal G1 and G2 connected to an internal balanced output electrode.

4 is an exploded perspective view of a balanced filter according to a first preferred embodiment of the present invention. Referring to FIG. 4, the balanced filter 40 according to the first preferred embodiment of the present invention may include a plurality of dielectric sheets ST1 and ST2. , ST3A or ST3B, ST4-ST7 are stacked ultra-compact balanced filter, the first dielectric sheet (ST1) is formed with a first resonance line 41 and the second resonance line 42, the second dielectric sheet A third resonance line 43 and a fourth resonance line 44 are formed in the second dielectric sheet ST2 stacked under the ST1.

The first resonance line 41 includes a first capacitive portion 41A formed of a wide strip line, and a first inductance formed from the first capacitive portion 41A and extended to a narrow non-linear strip line. The TV section 41B is included. In addition, the second resonance line 42 may include a second capacitive portion 42A formed of a wide strip line, and a second non-linear strip line formed from the second capacitive portion 42A. It includes two inductive portions 42B.

The third resonant line 43 is formed at a position corresponding to the first resonant line 41 of the second dielectric sheet ST2 and has a third capacitive portion 43A formed of a wide strip line. And a second inductive portion 43B extending from the third capacitive portion 43A to a narrow non-linear strip line and electrically connected to the first inductive portion 41B. In addition, the fourth resonant line 44 is formed at a position corresponding to the second resonant line 42 of the second dielectric sheet ST2 and includes a wide strip line 44A. ) And a fourth inductive portion 44B extending from the fourth capacitive portion 44A to a narrow non-linear strip line and electrically connected to the second inductive portion 42B.

In addition, the first capacitive portion 41A, the first inductive portion 41B, the second capacitive portion 42A, and the second inductive portion 42B formed on the first dielectric sheet ST1. ) Are arranged side by side, for example, the first inductive portion 41B, the first capacitive portion 41A, the second capacitive portion 42A, and the second inductive portion 42B. In this case, the first and second capacitive portions 41A and 42A are formed adjacent to each other. As a result, a capacitance between the first and second capacitive portions 41A and 42A may be formed.

The third capacitive portion 43A and the third inductive portion formed on the second dielectric sheet ST2 in correspondence with the capacitive portion and the inductive portion formed on the first dielectric sheet ST1. 43B, the fourth capacitive portion 44A and the fourth inductive portion 44B are arranged side by side, and the third inductive portion 43B, the third capacitive portion 43A, and the fourth The capacitive portion 44A and the fourth inductive portion 44B may be arranged in this order.

Couplings formed between the first and second resonators may be differently controlled as capacitance or inductance according to the arrangement order of each capacitive and inductive as described above.

Meanwhile, the first capacitive portion 41A is formed at a position overlapping with the third capacitive portion 43A, and the second capacitive portion 42A is formed of the fourth capacitive portion (A). It is formed at a position overlapping with 44A). And, in order to reduce unnecessary interference between the upper and lower inductive portions, the first inductive portion 41B is formed at a position not overlapping with the third inductive portion 43B except for the end portion thereof, and the second The inductive portion 42B is formed at a position not overlapping with the fourth inductive portion 44B except for an end thereof. Here, the end portions of the inductive portions are electrically connected to each other through conductive via holes.

It is preferable that the shape of the first inductive portion 41B is non-linear rather than straight in order to form the required electrical length in a small area. In addition, in order to form a spiral shape when the upper and lower inductive portions are connected, the second inductive portion 43B is preferably formed in an inverse shape with the shape of the third inductive portion 43B. ) Is non-linear and preferably formed in an inverse shape with the shape of the fourth inductive portion 44B.

5 is a perspective view illustrating a spatial structure of the balance filter of FIG. 4.

4 and 5, the end portion of the first inductive portion 41B is electrically connected to the end portion of the third inductive portion 43B through the first conductive via hole H1. In addition, the first inductive portion 41B and the third inductive portion 43B are connected to each other to form a spiral shape, and thus, by the first inductive portion 41B and the third inductive portion 43B. The required electrical length can be realized in a smaller area, and this spiral allows the balance filter of the present invention to be miniaturized. In addition, an unbalanced input electrode INE is electrically connected to the first capacitive portion 41A. The unbalanced input signal is input to the balance filter of the present invention through the input electrode INE.

In the micro-stacked balanced filter of the present invention, the first resonance line 41 operates as a lambda / 2 first resonator together with the third resonance line 43, and the second resonance line 42 is the fourth Together with the resonant line 44, it operates as a λ / 2 second resonator. Accordingly, an unbalanced input signal input through the input electrode INE passes through the band set by the two pairs of resonators of the present invention.

An end portion of the second inductive portion 42B is electrically connected to an end portion of the fourth inductive portion 44B through a second conductive via hole H2, and the second and fourth inductive portions 42B. The second conductive via hole H2 connecting 44B is a virtual ground (VG), and is equilibrated to each of the second and fourth capacitive 42A and 44A spaced a predetermined distance from the virtual ground. The output electrodes OUT1E and OUT2E are electrically connected to each other. Accordingly, the signal bandpassed by the two pairs of resonators is output as a balanced output signal having a phase difference of 180 ° through the balanced output terminals OUT1 and OUT2.

In the balanced filter of the present invention, a third dielectric sheet ST3A or ST3B is laminated on at least one of an upper portion of the first dielectric sheet ST1 and a lower portion of the second dielectric sheet ST2, and the third dielectric layer is stacked. Further comprising a coupling electrode (CEA) formed of a strip line at a position overlapping a part of the first capacitive portion (41A) and a part of the second capacitive portion (42A) of the sheet (ST3A or ST3B) It is desirable to. Through the coupling electrode CEA or CEB, it is possible to control the capacitance between the first and second resonance lines or the capacitance between the third and fourth resonance lines.

In the balanced filter of the present invention, in order to block mutual interference from the outside, the fourth and fifth dielectric sheets ST4 and ST5 are laminated on the uppermost layer and the lowermost layer of the balanced filter of the present invention, respectively. It is preferable to further include ground electrodes GE1 and GE2 formed on the fifth dielectric sheets ST4 and ST5.

The ultra-compact stacked balance filter according to the first preferred embodiment of the present invention described above can be miniaturized in a non-linear shape of the inductive part while simultaneously performing the function of the filter and the balun function, and is arranged in the arrangement of the capacitive part and the inductive part. Therefore, filter characteristics can be easily controlled.

Hereinafter, the ultra-slim stack type balanced filter according to the second embodiment of the present invention will be described with reference to FIGS. 6 and 7. Prior to the description, the description of the same configuration and the same operation as that of the ultra-sized multilayer balanced filter according to the second embodiment of the present invention will be omitted as much as possible.

FIG. 6 is an exploded perspective view of a balance filter according to a second preferred embodiment of the present invention. Referring to FIG. 6, the ultra-sized stacked balance filter 50 according to the second preferred embodiment of the present invention is according to the first embodiment. The number of layers of the dielectric sheet stacked with the balanced filter 40 and the functions of the electrodes formed in each dielectric sheet are the same, except that the first to fourth resonant lines are different from the first embodiment.

First, as a micro stack type balanced filter in which a plurality of dielectric sheets ST1, ST2, ST3A or ST3B, ST4-ST7 are stacked, the first resonance line 51 and the second resonance line 52 are formed on the first dielectric sheet ST1. ) And a third resonance line 53 and a fourth resonance line 54 are formed in the second dielectric sheet ST2 stacked under the second dielectric sheet ST1.

The first resonant line 51 may include a first capacitive portion 51A formed of a wide strip line and a first induct formed extending from the first capacitive portion 51A to a narrow non-linear strip line. And a second portion 51B, wherein the second resonant line 52 is a narrow non-linear line from the second capacitive portion 52A and the second capacitive portion 52A. And a second inductive portion 52B formed extending in the strip line.

The third resonant line 53 is formed at a position corresponding to the first resonant line 51 of the second dielectric sheet ST2 and has a third capacitive portion 53A formed of a wide strip line. And a second inductive portion 53B extending from the third capacitive portion 53A to a narrow non-linear strip line and electrically connected to the first inductive portion 51B, wherein the first resonance Together with line 51, a lambda / 2 resonator is formed. In addition, the fourth resonant line 54 is formed at a position corresponding to the second resonant line 52 in the second dielectric sheet ST2 and includes a fourth capacitive portion 54A formed of a wide strip line. ) And a fourth inductive portion 54B extending from the fourth capacitive portion 54A to a narrow non-linear strip line and electrically connected to the second inductive portion 52B. 2 together with the resonance line 52 to form a λ / 2 resonator.

In addition, the first capacitive part 51A, the first inductive part 51B, the second capacitive part 52A, and the second inductive part 52B are arranged side by side, and the third capacitive. The sieve portion 53A, the third inductive portion 53B, the fourth capacitive portion 54A and the fourth inductive portion 54B are arranged side by side. In the second embodiment of the present invention, The first capacitive part 51A, the first inductive part 51B, the second inductive part 52B, and the second capacitive part 52A may be arranged in this order. The second inductive portions 51B and 52B are formed close to each other. Accordingly, an inductance between the first and second inductive parts 51B and 52B may be formed. Alternatively, the third capacitive portion 53A, the third inductive portion 53B, the fourth inductive portion 54B, and the second capacitive portion 54A are arranged in this order.

The first capacitive portion 51A is formed at a position overlapping with the third capacitive portion 53A, and the second capacitive portion 52A is the fourth capacitive portion 54A. It is formed at a position overlapping with. The first inductive portion 51B is formed at a position not overlapping with the third inductive portion 51B, and the second inductive portion 52B is formed with the fourth inductive portion 54B. It is formed at a position that does not overlap.

The shape of the first inductive portion 51B is inverse to the shape of the third inductive portion 53B, and the shape of the second inductive portion 52B is the shape of the fourth inductive portion 54B. And reversed. In addition, an end portion of the first inductive portion 51B is electrically connected to an end portion of the third inductive portion 53B through a first conductive via hole H1, and the first capacitive portion 51A. It further comprises an input electrode (INE) formed electrically connected to.

An end portion of the second inductive portion 52B is electrically connected to an end portion of the fourth inductive portion 54B through a second conductive via hole H2. The second conductive via hole H2 connecting the second and fourth inductive parts 52B and 54B is a virtual ground, and the second and fourth capacitives spaced a predetermined distance L1 from the virtual ground as a starting point. The apparatus further includes balanced output electrodes OUT1E and OUT2E that are electrically connected to each of the portions 52A and 54A.

FIG. 7 is a perspective view illustrating a spatial structure of the balance filter of FIG. 6. Referring to FIGS. 6 and 7, at least one of an upper portion of the first dielectric sheet ST1 and a lower portion of the second dielectric sheet ST2 is shown. The dielectric sheet ST3A or ST3B is stacked and overlaps with a part of the first inductive part 51B and a part of the second inductive part 52B of the third dielectric sheet ST3A or ST3B. It further comprises a coupling electrode (CE1 or CE2) formed of a strip line. The fourth and fifth dielectric sheets ST4 and ST5 are stacked on the uppermost layer and the lowermost layer, respectively, and further include a ground electrode GE formed on the fourth and fifth dielectric sheets ST4 and ST5.

8A and 8B are equivalent circuit diagrams of the balanced filters of FIGS. 4 and 6, respectively.

3 and 8A, in the equivalent circuit shown in FIG. 8A, 41A-44A corresponds to the capacitive portion of the first to fourth resonators of FIG. 3, and FIG. 8. 41B-44B shown in (a) corresponds to the inductive portion of the first to fourth resonators of FIG. 3, and C1 denotes the first and second capacitive portions 41A and 42A and the coupling electrode. Equivalent capacitance between (CEA). In FIG. 8A, VG is a virtual ground line, and output terminals OUT1 and OUT2 are formed at the same distance L1 around the virtual ground line VG.

In the ultra-slim stack balanced filter according to the first embodiment of the present invention, the first resonance line 41 operates as one lambda / 2 resonator together with the third resonance line 43, and the second resonance line Reference numeral 42 acts as another lambda / 2 resonator together with the fourth resonance line 44. Therefore, the unbalanced input signal inputted through the input terminal IN by the two pairs of resonators operates as a filter for passing the set band. At the same time, the balanced output signal is output through the balanced output terminals OUT1 and OUT2 connected to a point separated by the same distance L1 from the virtual ground VG.

6 and 8B, in the equivalent circuit shown in FIG. 8B, 51A-54A corresponds to the capacitive portion of the first to fourth resonators of FIG. 6, and FIG. 8. 51B-54B shown in (b) of FIG. 6 correspond to the inductive portions of the first to fourth resonators of FIG. 6, and L1 represents the first and second inductive portions 51B and 52B and the coupling electrode ( Equivalent inductance between CEA). 8B, VG is a virtual ground line, and output terminals OUT1 and OUT2 are formed at the same distance L2 around the virtual ground line VG.

In the ultra-slim stack balanced filter according to the second embodiment of the present invention, the first resonance line 51 operates as one lambda / 2 resonator together with the third resonance line 53, and the second resonance line Reference numeral 52 serves as the other lambda / 2 resonator together with the fourth resonance line (54). Therefore, the unbalanced input signal inputted through the input terminal IN by the two pairs of resonators operates as a filter for passing the set band. At the same time, the balanced output signal is output through the balanced output terminals OUT1 and OUT2 connected to a point separated by the same distance L2 from the virtual ground VG.

In the above-described first and second embodiments of the present invention, when the output terminal is connected to any one of the second and fourth capacitive units, the input terminal and the output terminal may each be implemented as a filter having one.

The wireless communication terminal to which the present invention as described above is applied may include a mobile phone, a PDA, mobile communication equipment, and the like.

According to the present invention as described above, it is applicable to a wireless LAN, Bluetooth module, a wireless communication terminal, and the like, and simultaneously implementing a filter and a balun function using a λ / 2 resonator, By forming a part of the strip in a spiral shape and simultaneously using a stepped resonator having different line widths of the capacitive part and the inductive part, it is possible to manufacture a micro filter and easily control the filter characteristics according to the arrangement of the resonator. It can work.

The above description is only a description of specific embodiments of the present invention, and the present invention is not limited to these specific embodiments, and various changes and modifications of the configuration are possible from the above-described specific embodiments of the present invention. It will be apparent to those skilled in the art to which the present invention pertains.

Claims (28)

In the ultra-slim multilayer balanced filter in which a plurality of dielectric sheets are stacked, A first resonance portion formed on the first dielectric sheet and including a first capacitive portion formed of a wide strip line and a first inductive portion extending from the first capacitive portion to a narrow non-linear strip line; line; A second capacitive portion formed on said first dielectric sheet, said second capacitive portion formed by a wide strip line and a second inductive portion extending from said second capacitive portion to a narrow non-linear strip line; Resonance line; A third capacitive portion formed at a position corresponding to the first resonance line among the second dielectric sheets stacked below the first dielectric sheet and formed of a wide strip line, and from the third capacitive portion; A third resonant line extending into a narrow nonlinear strip line and including a third inductive part electrically connected to the first inductive part, the third resonant line forming a λ / 2 first resonator together with the first resonant line; The second dielectric sheet is formed at a position corresponding to the second resonance line, and extends from the fourth capacitive portion to a narrow nonlinear strip line from the fourth capacitive portion. A fourth resonant line including a fourth inductive part electrically connected to the second inductive part and forming a λ / 2 second resonator together with the second resonant line; And A balanced output terminal connected to the second and fourth capacitive parts spaced apart from each other by an equal distance from the electrically connected position between the second and fourth inductive parts, And the first capacitive part, the first inductive part, the second capacitive part, and the second inductive part are arranged side by side. The method of claim 1, wherein the first and second capacitive portion Ultra-compact stacked balance filter, characterized in that formed in close proximity to each other. The method of claim 2, wherein the first capacitive portion The ultra-compact layered balanced filter formed at a position overlapping with the third capacitive portion. The method of claim 2, wherein the first inductive portion An ultra-compact layered balanced filter, formed at a position not overlapping with the third inductive portion except for an end portion thereof. The shape of the first inductive portion is 3. Ultra-compact layered balanced filter, characterized in that the phase inverse to the third inductive portion. The method of claim 2, wherein the first inductive portion And an end portion thereof electrically connected to an end portion of the third inductive portion through a first conductive via hole. The method of claim 2, The ultra-compact stacked balance filter further comprises an input electrode formed by being electrically connected to the first capacitive portion. The method of claim 2, wherein the second capacitive portion The ultra-compact stacked balance filter formed at a position overlapping with the fourth capacitive portion. The method of claim 2, wherein the second inductive portion An ultra-compact layered balanced filter, formed at a position not overlapping with the fourth inductive portion except for an end portion thereof. The shape of the second inductive portion of claim 2 Ultra-compact layered balanced filter, characterized in that the phase opposite to the shape of the fourth inductive portion. The method of claim 2, wherein the second inductive portion And an end portion thereof electrically connected to an end portion of the fourth inductive portion through a second conductive via hole. The method of claim 2, A balanced output electrode formed by electrically connecting the second conductive via hole connecting the second and fourth inductive parts to each of the second and fourth capacitive parts spaced a predetermined distance from the virtual ground. Ultra-compact layered balance filter, characterized in that it further comprises. The method of claim 2, Stacking a third dielectric sheet on at least one of an upper portion of the first dielectric sheet and a lower portion of the second dielectric sheet, and overlapping a portion of the first capacitive portion and a portion of the second capacitive portion of the third dielectric sheet; Ultra-compact layered balanced filter further comprises a coupling electrode formed at a position. The method of claim 2, And stacking fourth and fifth dielectric sheets on top and bottom layers, respectively, and further comprising ground electrodes formed on the fourth and fifth dielectric sheets. The method of claim 1, wherein the first and second inductive portion Ultra-compact stacked balance filter, characterized in that formed in close proximity to each other. The method of claim 15, wherein the first capacitive portion The ultra-compact layered balanced filter formed at a position overlapping with the third capacitive portion. The method of claim 15, wherein the first inductive portion An ultra-compact layered balanced filter, formed at a position not overlapping with the third inductive portion except for an end portion thereof. The method of claim 15, wherein the shape of the first inductive portion Ultra-compact layered balanced filter, characterized in that the phase inverse to the third inductive portion. The method of claim 15, wherein the first inductive portion And an end portion thereof electrically connected to an end portion of the third inductive portion through a first conductive via hole. The method of claim 15, The ultra-compact stacked balance filter further comprises an input electrode formed by being electrically connected to the first capacitive portion. The method of claim 15, wherein the second capacitive portion The ultra-compact stacked balance filter formed at a position overlapping with the fourth capacitive portion. The method of claim 15, wherein the second inductive portion An ultra-compact layered balanced filter, formed at a position not overlapping with the fourth inductive portion except for an end portion thereof. The method of claim 15, wherein the shape of the second inductive portion is Ultra-compact layered balanced filter, characterized in that the phase opposite to the shape of the fourth inductive portion. The method of claim 15, wherein the second inductive portion And an end portion thereof electrically connected to an end portion of the fourth inductive portion through a second conductive via hole. The method of claim 15, A balanced output electrode formed by electrically connecting the second conductive via hole connecting the second and fourth inductive parts to each of the second and fourth capacitive parts spaced a predetermined distance from the virtual ground. Ultra-compact layered balance filter, characterized in that it further comprises. The method of claim 15, A third dielectric sheet stacked on at least one of an upper portion of the first dielectric sheet and a lower portion of the second dielectric sheet, wherein a portion of the third dielectric sheet overlaps a portion of the first inductive portion and a portion of the second inductive portion Ultra-compact layered balance filter, characterized in that it further comprises a coupling electrode formed on. The method of claim 15, And stacking fourth and fifth dielectric sheets on top and bottom layers, respectively, and further comprising ground electrodes formed on the fourth and fifth dielectric sheets. In a very small multilayer filter in which a plurality of dielectric sheets are stacked, A first resonance portion formed on the first dielectric sheet and including a first capacitive portion formed of a wide strip line and a first inductive portion extending from the first capacitive portion to a narrow non-linear strip line; line; A second capacitive portion formed on said first dielectric sheet, said second capacitive portion formed by a wide strip line and a second inductive portion extending from said second capacitive portion to a narrow non-linear strip line; Resonance line; A third capacitive portion formed at a position corresponding to the first resonance line among the second dielectric sheets stacked below the first dielectric sheet and formed of a wide strip line, and from the third capacitive portion; A third resonant line extending into a narrow non-linear strip line and including a second inductive part electrically connected to the first inductive part, the third resonant line forming a λ / 2 first resonator together with the first resonant line; The second dielectric sheet is formed at a position corresponding to the second resonance line, and extends from the fourth capacitive portion to a narrow nonlinear strip line from the fourth capacitive portion. A fourth resonant line including a fourth inductive part electrically connected to the second inductive part and forming a λ / 2 second resonator together with the second resonant line; An input electrode electrically connected to the first capacitive part; And An output terminal connected to one of the second and fourth capacitive parts, And the first capacitive part, the first inductive part, the second capacitive part, and the second inductive part are arranged side by side.

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