KR100390346B1 - A monolithic single block dielectric filter and monolithic single block duplexer dielectric filter for removing higher-order mode harmonic frequency and for improving in band response - Google Patents

Abstract

Coupling electrodes are formed on the top or bottom to electrically change the coupling direction of at least one resonator to remove harmonics, and the length of the resonator with coupling electrodes formed on the top and bottom is longer than other resonators. Disclosed are an integrated dielectric filter and an integrated duplexer dielectric filter in which high-order mode harmonics with improved band characteristics and in-band characteristics are improved.

The present invention provides an input electrode and an output electrode, or a transmitter, in which a coupling electrode is formed on an upper surface or a bottom surface of an integrally formed filter, and at least one resonator is electrically changed in order to remove high-order mode harmonics while simultaneously inputting and outputting signals. Coupling electrodes formed on the upper and lower surfaces of the resonator in which the electrode and the receiving end electrode are formed have a length of the resonator having a higher resonant frequency characteristic than other resonators in a coaxial direction compared to other resonators to form an integrated body, thereby improving in-band characteristics. It is characterized by.

According to the present invention, it is possible to improve the filter characteristics including the skirt and the spurious frequency characteristics by removing the higher order mode harmonics by electrically changing the coupling direction. Coupling electrodes are formed on the top and bottom surfaces of the resonator having a relatively high resonant frequency to increase the length of the resonator to have a resonant frequency similar to that of other resonators, thereby improving in-band characteristics.

Description

A monolithic single block dielectric filter and monolithic single block duplexer dielectric filter for removing higher-order mode harmonic frequency and for improving in band response

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric filter and a duplexer dielectric filter. In particular, a coupling electrode is formed on an upper surface or a bottom surface to electrically change the coupling direction of at least one resonator to remove high-order mode harmonics. The present invention relates to an integrated dielectric filter and an integrated duplexer dielectric filter, in which the length of the formed resonator is longer than that of other resonators, thereby eliminating high-order mode harmonics and improving in-band characteristics.

The role of a filter in a communication device is to select a signal of a desired frequency band, and the most ideal filter is a filter that passes only a signal of the desired frequency band without loss and removes all remaining signals. Therefore, the most important characteristics of the filter are the signal pass band, that is, the in band (IN BAND) that passes only the signal of the frequency band without loss and the out band (OUT BAND) that removes the remaining frequency band I'm satisfied.

Dielectric filters used in portable communication devices generally combine two or more dielectric resonators, for example a coaxial resonator or a re-entrant resonator, which resonates at a specific frequency. Make. The dielectric filter mainly determines the bandwidth, insertion loss, skirt and spurious frequency responses of the filter by the number of resonators and the coupling method of the filter.

However, in the related art, a dielectric filter or a duplexer dielectric filter is generally manufactured by coupling the same type of resonator between an input terminal electrode and an output terminal electrode. In this case, the same resonators are coupled only in the same direction, thereby coupling only the desired frequency band. But there is a problem that unnecessary high-order mode harmonics appear in the output stage. This higher-order harmonic has the problem of being a hazard to itself as well as other systems around it.

Thus, in order to solve the above problems, an integrated dielectric filter and an integrated duplexer dielectric filter have been proposed to form coupling electrodes on the top and bottom surfaces and to electrically change at least one resonator coupling direction. In this case, since the coupling direction of at least one resonator is changed, the higher order mode harmonics except for the first higher order mode resonant frequency may be removed. That is, the spurious frequency characteristic of the outband characteristics is designed such that one of the resonators constituting the filter described above is electrically coupled in opposite directions compared to the other resonators, or the resonator constituting the filter. The frequency characteristics can be improved by forming different types of resonators with different resonators.

And, the insertion loss of the pass frequency band among the in-band characteristics is determined by the selectivity of the resonators constituting the filter, their resonance frequency, and coupling coefficient therebetween. The resonator, that is, the resonator having both the coupling electrode formed on the upper and lower surfaces thereof has a problem that the resonant frequency is higher than that of the other resonators.

Accordingly, an object of the present invention is to form a coupling electrode on the top or bottom surface to electrically change the coupling direction of the at least one resonator to remove the higher-order mode harmonics, and to change the length of the resonator on which the coupling electrode is formed on the top and bottom surfaces. The present invention provides an integrated dielectric filter and an integrated duplexer dielectric filter, which are manufactured longer than the resonator and have improved in-band characteristics, and have improved in-band characteristics.

Specifically, the most important in-band characteristics in the filter are a pass bandwidth, an insertion loss, a ripple, a skirt frequency response, and the like. Optimizing the Pass Bandwidth, Insertion Loss, Ripple, and Skirt Frequency Response is desirable, and for this purpose, tuning the resonant frequencies of the resonators constituting the filter. SUMMARY OF THE INVENTION An object of the present invention is to provide an integrated dielectric filter designed to facilitate tuning.

The above characteristics are determined by the resonant frequency and selectivity of the resonators constituting the filter, and the coupling coefficients between the resonators. The coupling coefficient between the resonators is determined according to the resonance frequency and the selectivity of the resonator when the coupling method is determined. The selectivity of the resonator is also determined by the shape of the resonator and the material of the dielectric and the electrode making the resonator. Therefore, in the present invention, the selected dielectric is fabricated integrally, and the electrode to be patterned is coated on the surface of the filter with silver or copper, and the bonding method is made through the electrode coated on the dielectric surface, the integrated dielectric filter and the integrated duplexer dielectric filter. To provide. Accordingly, in the present invention, an integrated dielectric filter and an integrated duplexer designed to maximize the in-band characteristics of the filter by easily tuning the resonant frequencies of the resonators constituting the integrated dielectric filter to obtain the most suitable coupling coefficients between the resonators. To provide a dielectric filter.

When comparing two dielectric resonators having the same length, the resonant frequency of the resonator having the coupling electrode formed on only one side is lower than that of the resonator having the coupling electrode formed on both sides. This is because the resonant boundary conditions of these resonators are different. Therefore, in order to maximize the in-band characteristics of the filter by adjusting both of them to be near the passband frequency of the filter to make the resonant frequency of the two resonators, the length of the resonator having the coupling electrode on both sides is limited to the coupling electrode only on one side. It should be a little longer than the length of the resonator. This is the principle that the resonator is applied regardless of whether it is coaxial or concave. The present invention is a resonator having a coupling electrode only on one side of a resonator having coupling electrodes on both sides in one-piece dielectric filters made of dielectric regardless of coaxial or resonant resonators alone or mixed with two or more types of resonators. We want to give the shape a little longer than the length of.

1 to 5 are schematic cross-sectional views, top views, bottom views, top perspective views and bottom perspective views showing an integrated three-pole filter consisting of three coaxial resonators as a first embodiment of the present invention;

6 to 10 are schematic cross-sectional views, a top view of an integrated 4-pole filter formed by forming two intermediate coaxial resonators in the 3-pole filter of the first embodiment of the present invention. Bottom view, top perspective view and bottom perspective view,

11 to 15 are schematic cross-sectional, top and bottom views of the integrated filter formed by further connecting a coaxial resonator to both sides of the four-pole filter shown in the second embodiment of the third embodiment of the present invention. Top and bottom perspective views,

16 to 19 are top views, bottom views, top perspective views, and bottom perspective views showing an integrated duplexer filter in which a same coaxial resonator is coupled to a coupling electrode, respectively, as a fourth embodiment of the present invention;

20 to 23 are top views, bottom views, top perspective views, and bottom views of an integrated duplexer filter formed by further connecting a coaxial resonator to both sides of the duplexer filter shown in the fourth embodiment as a fifth embodiment of the present invention. Perspective,

24 to 28 are schematic cross-sectional views, top views, bottom views, top perspective views, and bottom views showing an integrated three-pole filter composed of two bilateral resonant resonators and one intermediate coaxial resonator as a sixth embodiment of the present invention. Perspective,

29 to 33 are schematic cross-sectional views, a top view of an integrated four-pole filter formed by forming two intermediate coaxial resonators in the three-pole filter of the sixth embodiment of the present invention. Bottom view, top perspective view and bottom perspective view,

34 to 38 are schematic cross-sectional, top and bottom views of the integrated filter formed by further connecting a coaxial resonator to each of the four-pole filters shown in the seventh embodiment as an eighth embodiment of the present invention; Top and bottom perspective views,

39 to 42 are top views, bottom views, top perspective views, and bottom perspective views showing an integrated duplexer filter in which a resonant resonator and a coaxial resonator are coupled to a coupling electrode, respectively, as a ninth embodiment of the present invention;

43 to 46 are top, bottom, top and bottom views of an integrated duplexer filter formed by further connecting a coaxial resonator to both sides of the duplexer filter shown in the ninth embodiment as a tenth embodiment of the present invention; Perspective view.

** Description of symbols for the main parts of the drawing **

RS, RC: Resonator RST: Stop Band Resonator

CE: Coupling Electrode GE: Common Electrode

IE: Input electrode OE: Output electrode

TE: Transmitting electrode RE: Receiving electrode

AE: antenna electrode N1: first dielectric filter

N2: second dielectric filter N3: third dielectric filter

N4: fourth dielectric filter

The present invention for achieving the above object of the present invention is applied to a dielectric filter formed by integrally forming at least one or more resonators, the integrated dielectric filter to improve the in-band characteristics and the removal of higher-order mode harmonics of the present invention, At least one intermediate resonator formed by selectively patterning coupling electrodes and common electrodes on the top and bottom surfaces of the resonators to form electrically opposite coupling directions with respect to the remaining resonators; And selectively forming an input terminal electrode and an output terminal electrode through which signals are input and output, respectively, and coupling coupling electrodes on the top and bottom surfaces of the resonator in which input and output terminal electrodes which are coupled to the coupling electrode of the input terminal electrode, the output terminal electrode, and the intermediate resonator are formed. And a coupling electrode formed on the upper and lower surfaces of the resonator in which the input / output end electrode is formed, and longer than the intermediate resonator in the coaxial direction so as to have a resonance frequency similar to the first harmonic resonance frequency of the intermediate resonator. It characterized in that made by forming integrally;

In this case, the intermediate resonator may be configured as a resonator having a different form from both resonators. In addition, the intermediate resonator is preferably composed of at least two or more.

Further, the stop band resonator may be formed by further bonding the resonator to both side resonators to improve skirt response.

On the other hand, the intermediate resonator and both sides of the resonator is most preferably made of the same type of resonator.

The present invention is applied to a duplexer dielectric filter formed by integrally forming at least one resonator. The integrated duplexer dielectric filter having improved high-band mode harmonic elimination and in-band characteristics is electrically connected to the remaining resonators of the resonators. At least one intermediate resonator formed by selectively patterning coupling electrodes and common electrodes on the top and bottom surfaces to form opposite coupling directions; Coupling electrodes are formed on the top and bottom surfaces of the resonator in which any one of a transmitting end electrode and a receiving end electrode to which a signal is transmitted and received is selectively formed, and a transmitting and receiving end electrode formed with coupling coupling electrodes of the transmitting end electrode, the receiving end electrode, and the intermediate resonator is formed. The coupling electrode is formed on the upper and lower surfaces of the resonator in which the transceiving end electrode is formed, and is longer than the intermediate resonator in the coaxial direction so as to have a resonant frequency similar to that of the first harmonic resonant frequency of the intermediate resonator. A two-side resonator formed and formed integrally with the transmitting end electrode and the receiving end electrode at both ends of the first dielectric filter and the second dielectric filter, the upper surface of the junction of the first dielectric filter and the second dielectric filter; And selective antenna electrode and common electrode on the bottom Characterized in that fastening hayeoseo made.

At this time, the intermediate resonator may be configured as a resonator having a different form from both resonators.

In addition, a resonator for improving a skirt response may be further formed on each of the resonators connected to the transmitting end electrode and the receiving end electrode.

The resonator is most preferably made of the same resonator.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.

First, in the description of the present invention, unless there is a special confusion, a reference number is assigned as necessary without giving a specific reference number, and the same reference numerals are assigned to components that perform the same function, and the same concept is applied. Overlapping and repeating parts will be omitted.

In addition, the filter described below uses a filter in which a coaxial resonator and a resonant resonator are selectively bonded to each other, and these resonators are made so that the first harmonics (first order harmonics frequency) match the characteristics of the designed filter. Hereinafter, the embodiment schematically shows a filter composed of a coaxial resonator and a resonant resonator, and does not mean a resonator or a filter having certain characteristics. The resonators of these examples can be modified and applied in other combinations or orders of coaxial or resonant resonators under the conditions of the same resonant frequency.

First, in the following embodiment, a dielectric filter and a duplexer dielectric filter formed by integrally combining the same resonators will be described. In the dielectric filter and the duplexer dielectric filter described herein, a coupling electrode is basically formed on the upper surface of each resonator region, and a common electrode and a coupling electrode for selectively changing the coupling direction are formed on the bottom surface of the dielectric filter and the duplexer dielectric filter. Is applied to the common electrode.

1 to 5 are schematic cross-sectional, top, bottom, top and bottom perspective views showing an integrated three-pole filter consisting of three coaxial resonators as a first embodiment of the present invention. 1 to 5, as shown in the schematic cross-sectional view of FIG. 1, three coaxial resonators RS, RC, and RS are formed on both sides of the intermediate coaxial resonator RC. RS is formed longer than the intermediate coaxial resonator RC.

In addition, as shown in the top view of FIG. 2, a coupling electrode CE is formed on each of the three coaxial resonators, and as illustrated in the bottom view of FIG. 3, an intermediate coaxial resonator RC region is illustrated. A bottom common electrode GE is formed at the bottom surface, and a coupling electrode CE is formed at both coaxial resonators RS, and an input end electrode IE and an output end electrode are located near the coupling electrode CE. (OE) is selectively formed respectively.

As shown in the top perspective view of FIG. 4, the whole side surface is coated with the side common electrode GE, and the bottom common electrode GE formed on the bottom of the intermediate coaxial resonator as shown in the bottom perspective view of FIG. 5. It is connected to the side common electrode GE formed on this side, and the input terminal electrode IE and the output terminal electrode OE have a predetermined distance from the side common electrode GE and the coupling electrode CE, and are independent of the bottom edge. It is formed. The integrated three-pole filter configured as described above is an electrode in which the electric and magnetic fields of the signal are coated on the surface of the resonator dielectric by coupling and common electrodes formed on the upper and lower surfaces of each resonator. From the side to the electrode on the side of the resonator to couple. In the following, all operations are equally applied.

6 to 10 are schematic cross-sectional views, a top view of an integrated 4-pole filter formed by forming two intermediate coaxial resonators in the 3-pole filter of the first embodiment of the present invention. Bottom view, top perspective view and bottom perspective view. 6 to 10, compared with the first embodiment, two intermediate coaxial resonators RC1 and RC2 are formed and two coaxial resonators formed on both sides of the two intermediate coaxial resonators RC1 and RC2. The mold resonator RS is formed longer than the two intermediate coaxial resonators RC1 and RC2.

As shown in the top and bottom perspective views of FIGS. 9 and 10, the whole side surface is coated with the side common electrode GE, and the bottom common electrode GE formed on the bottom of the two intermediate coaxial resonators is mutually different. It is connected to the side common electrode GE formed on the side at the same time. Hereinafter, since the coupling electrode, the input terminal electrode, and the output terminal electrode presented in the first embodiment are the same, redundant descriptions are omitted.

11 to 15 are schematic cross-sectional, top and bottom views of the integrated filter formed by further connecting a coaxial resonator to both sides of the four-pole filter shown in the second embodiment of the third embodiment of the present invention. Top and bottom perspective views. 11 to 15, as shown in the schematic cross-sectional view of FIG. 11, a coaxial resonator (RST) is provided on both sides of the integrated four-pole filter (RS, RC1, RC2, RS) shown in the second embodiment. Is further connected to form a single body, and the coaxial resonators RST added to both sides are also formed longer than the two intermediate coaxial resonators RC1 and RC2.

As a result, the skirt frequency characteristic is improved in the stopband band. The resonators used for this purpose are also called stopband resonators. Hereinafter, the coaxial resonator (RST) added in the third embodiment is called a stop band resonator.

The point to be pointed out here is that the stop band resonators (RSTs) added to both sides of the filter should, in principle, be combined with a resonator (RS) having an input electrode and an output electrode formed on one side (for example, the bottom). A coupling electrode, which may be shorter than the length of the intermediate resonators RC1 and RC2, may be formed on the upper surface of the stop band resonator RST to improve the manufacturing process (Powder Pressing and Electrode Printing). The length of is similar to that of the resonator RS in which the input / output end electrodes to which they are coupled are formed. That is, as the coupling electrode is formed on the top surface of the stop band resonator RST, the resonance frequency is increased by the height of the upper surface to lower the resonance frequency to the passband frequency of the filter. In addition, in order to prevent the stop band resonator RST from being coupled twice with the resonator RS having the input / output end electrode, the stop band resonator RST of the upper surface and the resonator RS having the input / output end electrode are common. This was prevented by putting an electrode (GE) pattern.

On the other hand, as shown in the top view of Figure 12, the integrated four-pole filter (RS, RC1, RC2, RS) presented in the second embodiment and the two stop band resonators (RST) added in the third embodiment An upper common electrode GE is formed therebetween, and a coupling electrode CE is formed in the stop band resonator RST. As shown in the bottom view of FIG. 13, the coupling electrode CE of the stop band resonator RST is formed in the vicinity of the input terminal electrode IE and the output terminal electrode OE.

In addition, as shown in the top and bottom perspective views of FIGS. 14 and 15, the entire side surface is coated with the side common electrode GE, and the top common electrode GE is connected with the side common electrode GE. The bottom common electrodes GE formed on the bottom surfaces of the two intermediate coaxial resonators are connected to each other and to the side common electrodes GE formed on the side surfaces thereof. Hereinafter, since the coupling electrode, the input terminal electrode, and the output terminal electrode presented in the first embodiment are the same, redundant descriptions are omitted.

16 to 19 illustrate a top view, a bottom view, a top perspective view, and a bottom perspective view of an integrated duplexer filter in which a same coaxial resonator is coupled to a coupling electrode, respectively, as a fourth embodiment of the present invention. 16 to 19, the first dielectric filter N1 and the second dielectric filter N2 similar to the three-pole dielectric filters shown in the first embodiment are integrally coupled to each other. The structure of the first dielectric filter N1 and the second dielectric filter N2 is configured in the form shown in the first embodiment.

As shown in the top view of FIG. 16, a top common electrode GE is formed at a junction of the first dielectric filter N1 and the second dielectric filter N2, and as shown in the bottom view of FIG. 17. The coupling electrode CE and the bottom common electrode GE are formed on the first dielectric filter N1, and the transmission end electrode TE is formed on the outer coaxial resonator RS of the first dielectric filter N1. have. The second dielectric filter N2 also includes a coupling electrode CE and a bottom common electrode GE, and a receiving end electrode RE is formed on an outer coaxial resonator RS of the second dielectric filter N2. have. An antenna electrode AE is formed at a junction between the first dielectric filter N1 and the second dielectric filter N2.

Meanwhile, as shown in the top perspective view of FIG. 18, the top common electrode GE is connected to the side common electrode GE at a junction between the first dielectric filter N1 and the second dielectric filter N2. As shown in the bottom perspective view of FIG. 19, the bottom common electrode GE formed in each of the first dielectric filter N1 and the second dielectric filter N2 is connected to the side common electrode GE.

20 to 23 are top views, bottom views, top perspective views, and bottom views of an integrated duplexer filter formed by further connecting a coaxial resonator to both sides of the duplexer filter shown in the fourth embodiment as a fifth embodiment of the present invention. Perspective view. 20 to 23, stop band resonators (RSTs) are further connected to both sides of the integrated duplexer dielectric filter shown in the second embodiment in order to improve the skirt frequency characteristics. The added stop band resonator RST is also formed longer than the intermediate coaxial resonator RC formed in the first dielectric filter N1 and the second dielectric filter N2, respectively. This reason has already been explained in FIG. 11, and thus redundant description is avoided. As a result, the skirt frequency characteristic is improved in the stopband band.

As shown in the top view of FIG. 20, an upper common electrode GE is formed between the junction of the first dielectric filter N1 and the second dielectric filter N2, and the first dielectric filter N1 is formed therein. The upper common electrode GE is formed between the second dielectric filter N2 and the stop band resonator RST. As shown in the bottom view of Fig. 21, the bottom common electrode is formed in the intermediate coaxial resonator region, and the coupling electrodes CE are formed in the other resonators. An antenna electrode AE is formed at a junction of the first dielectric filter N1 and the second dielectric filter N2, and the first dielectric filter N1, the second dielectric filter N2, and the stop band resonator Transmitting end electrode TE and receiving end electrode RE are selectively formed between RST.

Meanwhile, as shown in the top perspective view and the bottom perspective view of FIGS. 22 and 23, the top common electrode GE is connected to the side common electrode GE formed on the side surface, and the first dielectric filter N1 and the second dielectric filter N1 are connected to the side common electrode GE. The bottom common electrode GE formed on the intermediate coaxial resonator of the dielectric filter N2 is connected to the side common electrode GE.

Hereinafter, the dielectric filter and the duplexer dielectric filter which are integrally formed by combining different resonators will be described.

24 to 28 are schematic cross-sectional views, top views, bottom views, top perspective views, and bottom views showing an integrated three-pole filter composed of two bilateral resonant resonators and one intermediate coaxial resonator as a sixth embodiment of the present invention. Perspective view. 24 to 28, as shown in the schematic cross-sectional view of FIG. 24, two bilateral resonant resonators (RS ′) and one intermediate coaxial resonator (RC), and an intermediate coaxial resonator (RC) Both concave resonators (RS ') formed on both sides of the longer than the intermediate coaxial resonator (RC) is formed.

In addition, as shown in the top view of FIG. 25, a coupling electrode CE is formed on each of the two bilateral resonant resonators RS ′ and one intermediate coaxial resonator RC. As shown in the bottom view, the bottom common electrode GE is formed in the region of the intermediate coaxial resonator RC, and the coupling electrode CE 'is formed on both side resonant resonators RS'. An input terminal electrode CE 'and an output terminal electrode CE' are selectively formed in proximity to the ring electrode CE '. In this case, the input terminal electrode CE ′ and the output terminal electrode CE ′ may be formed integrally with the coupling electrode CE ′ formed on the bottom surface, or may be separately formed.

As shown in the top perspective view of FIG. 27, the entire side surface is coated with the side common electrode GE, and as shown in the bottom perspective view of FIG. 28, the bottom common electrode GE formed on the bottom of the intermediate coaxial resonator. It is connected to the side common electrode GE formed on this side, and the input terminal electrode CE 'and the output terminal electrode CE' are formed at the bottom edge with a predetermined distance from the bottom common electrode GE, and formed on the bottom surface. It is formed integrally with the coupling electrode CE '. The integrated three-pole filter configured as described above is applied to the surface of the resonator dielectric having the electric and magnetic fields of the signal by the coupling electrode CE and the common electrode GE formed on the upper and lower surfaces of each resonator. It moves from the electrode to the electrode on the side of the resonator and couples it.

29 to 33 are schematic cross-sectional views, a top view of an integrated four-pole filter formed by forming two intermediate coaxial resonators in the three-pole filter of the sixth embodiment of the present invention. Bottom view, top perspective view and bottom perspective view. 29 to 33, compared with the sixth embodiment, two intermediate coaxial resonators RC1 and RC2 are formed, and both yaw formed on both sides of the two intermediate coaxial resonators RC1 and RC2. The square resonator RS 'is formed longer than the two intermediate coaxial resonators RC1 and RC2.

32 and 33, the entire side is coated with the side common electrode GE, as shown in the top and bottom perspective views, and the bottom common electrode formed on the bottoms of the two intermediate coaxial resonators RC1 and RC2. The GEs are connected to each other and to the side common electrode GE formed on the side surface. Hereinafter, since the coupling electrode, the input terminal electrode, and the output terminal electrode presented in the sixth embodiment are the same, overlapping descriptions are omitted.

34 to 38 are schematic cross-sectional, top and bottom views of the integrated filter formed by further connecting a coaxial resonator to each of the four-pole filters shown in the seventh embodiment as an eighth embodiment of the present invention; Top and bottom perspective views. 34 to 38, as shown in the schematic cross-sectional view of FIG. 34, stop band resonators (" ") on both sides of the integrated four-pole filters RS ', RC1, RC2, and RS' shown in the seventh embodiment. RST) is further connected to form an integral type, and the stop band resonators RST added to both sides are also formed longer than the two intermediate coaxial resonators RC1 and RC2. This reason has already been explained in FIG. 11, and thus redundant description is avoided. As a result, the skirt frequency characteristic is improved in the stopband band.

In addition, as shown in the top view of FIG. 35, the integrated four-pole filters RS ', RC1, RC2, and RS' shown in the seventh embodiment and the two stop band resonators added in the eighth embodiment ( An upper common electrode GE is formed between the RSTs, and a coupling electrode CE is formed in the stop band resonator RST. As shown in the bottom view of FIG. 36, the coupling electrode CE of the stop band resonator RST is formed in the vicinity of the input terminal electrode IE and the output terminal electrode OE.

Meanwhile, as shown in the top and bottom perspective views of FIGS. 37 and 38, the entire side surface is coated with the side common electrode GE, and the top common electrode GE is connected to the side common electrode GE. The bottom common electrodes GE formed on the bottoms of the two intermediate coaxial resonators RC1 and RC2 are connected to each other and to the side common electrodes GE formed on the side surfaces thereof. Hereinafter, since the coupling electrode, the input terminal electrode, and the output terminal electrode presented in the sixth embodiment are the same, overlapping descriptions are omitted.

39 to 42 are top, bottom, top and bottom perspective views showing an integrated duplexer filter in which a resonant resonator and a coaxial resonator are coupled to a coupling electrode, respectively, as a ninth embodiment of the present invention. 39 to 42, a third dielectric filter N3 and a fourth dielectric filter N4 similar to the three-pole dielectric filter shown in the sixth embodiment are integrally coupled to each other. The structures of the third dielectric filter N3 and the fourth dielectric filter N4 are configured in the form shown in the sixth embodiment.

As shown in the top view of FIG. 39, a top common electrode GE is formed at a junction of the third dielectric filter N3 and the fourth dielectric filter N4, and as shown in the bottom view of FIG. 40. The coupling electrode CE 'and the bottom common electrode GE are formed on the third dielectric filter N3, and the transmitting end electrode CE' is formed on the outer resonant resonator RS 'of the third dielectric filter N3. Is formed. The fourth dielectric filter N4 also includes a coupling electrode CE ′ and a bottom common electrode GE, and includes a receiving end electrode CE ′ in the outer resonant resonator RS ′ of the fourth dielectric filter N4. Is formed. An antenna electrode AE is formed at a junction between the third dielectric filter N3 and the fourth dielectric filter N4. As can be seen from the reference number, it can be seen that the coupling electrode CE 'and the transmitting and receiving end electrode CE' formed on the bottom are integrally formed.

Meanwhile, as shown in the top perspective view of FIG. 41, an upper common electrode GE is connected to a side common electrode GE at a junction between the third dielectric filter N3 and the fourth dielectric filter N4. As shown in a bottom perspective view of 42, a bottom common electrode GE formed in each of the third and fourth dielectric filters N3 and N4 is connected to the side common electrode GE.

43 to 46 are top, bottom, top and bottom views of an integrated duplexer filter formed by further connecting a coaxial resonator to both sides of the duplexer filter shown in the ninth embodiment as a tenth embodiment of the present invention; Perspective view. 43 to 46, stop band resonators (RSTs) are further connected to both sides of the integrated duplexer dielectric filter shown in the ninth embodiment so as to improve skirt frequency characteristics. The added stop band resonator RST is also formed longer than the intermediate coaxial resonator RC formed in the third and fourth dielectric filters N3 and N4, respectively. This reason has already been explained in FIG. 11, and thus redundant description is avoided. As a result, the skirt frequency characteristic is improved in the stopband band.

As shown in the top view of FIG. 43, a top common electrode GE is formed between the junction of the third dielectric filter N3 and the fourth dielectric filter N4, and the third dielectric filter N3 is formed therein. The upper common electrode GE is formed between the fourth dielectric filter N4 and the stop band resonator RST. In addition, as shown in the bottom view of FIG. 44, the bottom common electrode GE is formed in the middle coaxial resonator RC region, and the coupling electrodes CE are formed in the other resonators. An antenna electrode AE is formed at a junction of the third dielectric filter N3 and the fourth dielectric filter N4, and the third dielectric filter N3, the fourth dielectric filter N4, and the stop band resonator Transmitting end electrode TE and receiving end electrode RE are selectively formed between RST.

Meanwhile, as shown in the top and bottom perspective views of FIGS. 45 and 46, the top common electrode GE is connected to the side common electrode GE formed on the side surface, and the third dielectric filter N3 and the fourth dielectric filter N3 are connected to the side common electrode GE. The bottom common electrode GE formed in the intermediate coaxial resonator RC of the dielectric filter N4 is connected to the side common electrode GE.

As described above, the integrated dielectric filter and the integrated duplexer dielectric filter, which have improved high-band mode harmonics and improved in-band characteristics, eliminate the high-order mode harmonics by electrically changing the coupling direction, thereby improving the skirt and spurious frequency characteristics. The filter characteristics included can be improved. Coupling electrodes are formed on the upper and lower surfaces to make the length of a resonator having a relatively high resonance frequency longer to have the same resonance frequency as other resonators, thereby improving in-band characteristics.

The present invention is not limited to the above-described embodiment, and it will be apparent that many modifications are possible by those skilled in the art within the technical spirit of the present invention.

Claims (9)

In the dielectric filter formed by integrally forming at least one resonator, At least one intermediate resonator formed by selectively patterning a coupling electrode and a common electrode on an upper surface and a lower surface of the resonator to form an electrically opposite coupling direction with respect to the remaining resonators; And Input electrode and output electrode which input and output signals are selectively formed, respectively, and coupling electrodes are formed on the top and bottom surfaces of the resonator on which the input and output electrodes which are coupled with the coupling electrodes of the input and output electrodes and the intermediate resonator are formed. In addition, the coupling electrode is formed on the upper and lower surfaces of the resonator in which the input / output end electrode is formed, which is longer than the intermediate resonator in the coaxial direction so as to have a resonance frequency similar to the first harmonic resonance frequency of the intermediate resonator. Both side resonators formed by; The integrated dielectric filter with the high-order mode harmonics removal and in-band characteristics, characterized in that formed by forming an integral. 2. The integrated dielectric filter of claim 1, wherein the intermediate resonator is a resonator having a shape different from that of both sides of the resonator. 2. The integrated dielectric filter of claim 1, wherein the intermediate resonator includes at least two intermediate resonators. 2. The integrated dielectric filter of claim 1, further comprising a stop band resonator for improving skirt response to both sides of the resonator. 2. The integrated dielectric filter of claim 1, wherein the intermediate resonator and both resonators are formed of resonators of the same type. In the duplexer dielectric filter formed by integrally forming at least one resonator, At least one intermediate resonator formed by selectively patterning coupling electrodes and common electrodes on the top and bottom surfaces of the resonators to form electrically opposite coupling directions with respect to the remaining resonators; Coupling electrodes are formed on the top and bottom surfaces of the resonator in which any one of a transmitting end electrode and a receiving end electrode to which a signal is transmitted and received is selectively formed, and a transmitting and receiving end electrode formed with coupling coupling electrodes of the transmitting end electrode, the receiving end electrode and the intermediate resonator is formed. The coupling electrode is formed on the upper and lower surfaces of the resonator in which the transceiving end electrode is formed, and is longer than the intermediate resonator in the coaxial direction so as to have a resonant frequency similar to that of the first harmonic resonant frequency of the intermediate resonator. A two-side resonator formed and formed integrally with the transmitting end electrode and the receiving end electrode at both ends of the first dielectric filter and the second dielectric filter, the upper surface of the junction of the first dielectric filter and the second dielectric filter; And selective antenna electrode and common electrode on the bottom Turning hayeoseo improve the removal and the in-band characteristic of the high-order harmonic modes, characterized in that having made one-piece dielectric duplexer filter. 7. The integrated duplexer dielectric filter of claim 6, wherein the intermediate resonator is a resonator having a shape different from that of both resonators. 7. The integrated duplexer according to claim 6, wherein a resonator for improving a skirt response is further bonded to each of the resonators connected to the transmitting end electrode and the receiving end electrode. Dielectric filter. 7. The integrated duplexer dielectric filter of claim 6, wherein the resonator comprises the same resonator.