KR100541067B1 - Duplexer dielectric filter - Google Patents

Abstract

According to the present invention, a transmitting side dielectric filter 100 including a plurality of resonators and a receiving side dielectric filter 200 including a plurality of resonators are symmetrically or asymmetrically coupled to both sides of an antenna terminal, and the transmitting side dielectric filter And the receiving dielectric filter extends in one direction about the antenna electrode AE, and the angle θ formed by both dielectric filters 100 and 200 around the antenna electrode is in a range of 0 to 179 °. Provide a filter.

Dielectric Filters, Duplexers

Description

Duplexer dielectric filter

1 is a perspective view showing an integrated dielectric filter manufactured according to the elliptic function filter theory;

2A and 2B are graphs schematically showing frequency characteristics of the dielectric filter of FIG. 1;

3 is a perspective view of a dielectric filter incorporating one more medium resonator for increasing attenuation in an integrated dielectric filter manufactured according to the elliptic function filter theory;

4A and 4B are graphs schematically showing frequency characteristics of the dielectric filter of FIG. 3;

5A and 5B are a top perspective view and a plan view showing a duplexer dielectric filter according to the present invention using the integrated dielectric filter of FIG.

6A and 6B are perspective views of a dielectric filter including a plurality of resonators;

7a and 7b are graphs showing the frequency characteristics of the dielectric filter shown in FIGS. 6a and 6b;

8A and 8B are top and perspective views showing an integrated duplexer dielectric filter in accordance with an embodiment of the present invention using the dielectric filter shown in FIG. 6;

9 is a graph schematically showing frequency characteristics of a transmitting end and a receiving end of the duplexer dielectric filter shown in FIG. 8;

FIG. 10 is a graph illustrating the super-freeze frequency characteristics of the transmitter and the receiver of the duplexer dielectric filter shown in FIG. 8.

Explanation of symbols on the main parts of the drawings

# 1 ~ # 10: Resonator BSR: Stop Band Resonator

CE: Coupling Electrode GE: Common Electrode

IE: Input electrode OE: Output electrode

TE: Transmitting electrode RE: Receiving electrode

AE: Antenna electrode

TECHNICAL FIELD The present invention relates to a duplexer dielectric filter, and more particularly, to an improved duplexer dielectric filter capable of obtaining a steep frequency characteristic in a transition band band and at the same time reducing the insertion loss.

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 characteristic that only passes the signal of the frequency band without loss and the out-band characteristic that removes the remaining frequency band. I'm satisfied. Dielectric filters, such as those used in portable communication devices, are generally made by combining two or more dielectric resonators, for example a coaxial resonator or a re-entrant resonator, which resonates at a specific frequency. . The dielectric filter mainly determines the bandwidth, insertion loss, skirt and spurious frequency responses of the filter by the number of resonators constituting the filter and the coupling method. However, due to the limitation of the bandwidth in the currently allocated frequency, there is a need for a sudden attenuation of frequency components other than the passband frequency. That is, when filtering, the skirt which shows the electrical characteristic of the filter is required to be steep.

Existing dielectric filter has an input stage resonator and an output stage resonator coupled to any one of an input (In) or an output (Pro) probe interpolated into a vibration hole, and an intermediate resonator coupled between the input stage resonator and the output stage resonator. The basic configuration is a three-pole filter that combines columns or rows. In order to obtain a steep skirt frequency characteristic in one or both frequency bands from the dielectric filter configured as described above, a stop band resonator (BSR) may be coupled to one or both sides of the input stage resonator or the output stage resonator. As described above, the cut-off frequency characteristic in the stopband band of the in-band characteristics can be greatly improved by combining the stopband resonator with each of the input stage resonator and the output stage resonator, as described above. However, there is a disadvantage that the insertion loss is increased by combining a plurality of resonators.

In order to solve this problem, the applicant of Patent Application No. 10-2001-0002523 combines an input stage resonator and an output stage resonator, and attaches odd or even resonators to the steep skirt frequency characteristics at both sides or one side. In addition, the proposed method can reduce the insertion loss. In this case, the elliptic function filter theory is applied. To apply the elliptic function theory to make an elliptic function filter, first, a resonator is formed so that non-adjacent resonators can be coupled to each other. The arrangement of these should fit, and also find a suitable method of joining them. In addition, another requirement is that the elliptic coupling between the resonators that are not next to each other should be negative coupling. This can be satisfied by combining three resonators in a triangle.

In addition, in order to improve the frequency characteristics in both the in-band and the out-band, the applicant has not only been able to lower the insertion loss, which was a conventional problem in the "dielectric filter and duplexer dielectric filter" patent application No. 10-2001-0002523 In addition, the variation of the coupling characteristics between the resonator configuration of the dielectric filter and the stopband resonator also improves the skirt frequency characteristics and spurious frequency characteristics.

Then, a brief look at the prior art here.

1 is a perspective view showing an integrated dielectric filter manufactured according to the elliptic function filter theory. As shown in FIG. 1, a dielectric filled therein is formed, and a resonance hole (H) is formed in the dielectric, and three resonance holes (H) are formed in a triangle at a predetermined interval and all in the transverse direction. Let's do it. The coupling electrode CE is patterned on the upper surface of each of the resonance hole H regions for coupling the resonance period, and all regions except the patterned portion are coated with the common electrode GE. In this case, the coupling electrode CE, the inner wall of the resonance hole H, and the common electrode GE are integrally connected. Functionally, the input stage resonator (# 1), the intermediate resonator (# 2), the output stage resonator (# 3), the intermediate resonator (# 2) between the input stage resonator (# 1) and output stage resonator (# 3) It is coupled to one side.

Meanwhile, an input terminal electrode IE and an output terminal electrode OE through which signals are input and output are formed adjacent to the coupling electrode CE. In this case, the input end electrode IE and the output end electrode OE are complementary in function, and thus the input end electrode IE may perform the function of the output end electrode OE, and is linked to the output end electrode OE. Serves as the input terminal electrode IE. Accordingly, the region where the coupling electrode CE adjacent to the input terminal electrode IE through which the signal is input serves as the input terminal resonator # 1, and the coupling electrode CE adjacent to the output terminal electrode OE is formed. The area serves as the output stage resonator (# 3). Like the input end electrode IE and the output end electrode OE, the input end resonator # 1 and the output end resonator # 3 have a complementary function, and the input end electrode IE and the output end electrode OE have a signal. By performing any one function in the input / output relationship of the input stage resonator (# 1) and the output stage resonator (# 3) to perform a complementary function.

Coupling electrodes CE are formed in each resonator region as described above, and these coupling electrodes CE are spaced apart from each other and patterned. In this case, according to the elliptic function filter theory, the input stage resonator # 1 and the output stage resonator # 3 may be negatively coupled, that is, the input stage resonator (#) may be weakly coupled as compared with the coupling between other resonators. 1) and the opposing distance between the coupling electrodes CE formed in the region of the output stage resonator (# 3) is increased or the mutually opposing area is reduced.

2A and 2B are graphs schematically showing frequency characteristics of the dielectric filter of FIG. 1. As shown in FIGS. 2A and 2B, the frequency characteristics of the 3-pole filter shown in FIG. 1 have an insertion loss compared to that of a filter in which a stop band resonator (BSR) is coupled to a conventional column or row type. At the same time, it shows a steep skirt frequency characteristic on one side of the transition bands on both sides of the passband and attenuation width is A. Here, A is an arbitrary value for comparison of the attenuation width described later. On the other hand, the steep skirt frequency characteristics of the high or low transition frequency band formed on the left and right sides of the passband can be adjusted by tuning the resonator shown in FIG.

On the other hand, in order to obtain steep cutoff frequency characteristics in both stopbands of the passband, the number of resonators of the elliptic function filter must be at least four. This can be confirmed through FIG. 3.

3 is a perspective view of a dielectric filter incorporating an intermediate resonator for increasing attenuation width to an integrated dielectric filter manufactured according to the elliptic function filter theory. Referring to FIG. 3, it can be seen that one more medium resonator # 4 is coupled to the dielectric filter shown in FIG. 1. The medium resonator # 4 is located in the input stage resonator # 1 region of FIG. 1. As a result, the input stage resonator # 1 is formed at one side thereof. The intermediate resonator # 4 is a resonator that mediates the input and output of signals to adjacent resonators, and serves to increase attenuation width in frequency characteristics. In addition, the intermediate resonator # 4 has negative coupling with the output stage resonator # 3 among the resonators coupled in a triangle form according to the elliptic function filter theory.

4A and 4B are graphs schematically showing frequency characteristics of the dielectric filter of FIG. 3. 4A and 4B, it can be seen that the attenuation width A1 is increased compared to the results shown in FIGS. 2A and 2B. As a result, a skirt frequency characteristic having a steeper slope in the transition band band can be obtained.

By the way, in order to obtain a steeper frequency characteristic in the transition band band, the method of increasing the above-mentioned intermediate resonator # 4 has been proposed. However, the disadvantage that the insertion loss increases due to the length of the dielectric filter is increased. In addition, as the length increases, there is a limit to the compact design design. In addition, in order to obtain a steep skirt frequency characteristic at both sides of the transition band band, a stop band resonator coupled to the input end electrode IE or the output end electrode OE simultaneously in the region of the input end resonator # 1 or the output end resonator # 3. BSR) is coupled, but when the stop band resonator (BSR) is coupled in a long length state as described above, the insertion loss increases as it is combined in the form of a row or column like the intermediate resonator (# 4). Occurs.

The same problem occurs even when a duplexer dielectric filter is manufactured in which the dielectric filter configured as described above is coupled to the antenna electrode in the state of such a problem.

Accordingly, an object of the present invention is to provide a transmission-side dielectric filter in which an elliptic function filter is provided so that a steep frequency characteristic can be obtained in a transition band band, and a compact design can be designed; An elliptic function filter is provided to provide a duplexer dielectric filter in which a receiving side dielectric filter for receiving a signal is symmetrically or asymmetrically coupled in one direction about an antenna electrode.

Another object of the present invention is to apply a microstrip filter on one side of the transceiving side dielectric filter or on one side of the region where the dielectric filter is coupled, thereby improving high-order mode harmonic elimination and spurious frequency characteristics while minimizing insertion loss. To provide a duplexer dielectric filter having a microstrip filter.

The present invention for achieving the object of the present invention, the transmitting side dielectric filter 100 consisting of a plurality of resonators, the receiving side dielectric filter 200 consisting of a plurality of resonators on both sides of the antenna electrode formation region Asymmetrically or asymmetrically coupled, the transmitting dielectric filter and the receiving dielectric filter extend in one direction about the antenna electrode AE, and the angle θ formed by both dielectric filters 100 and 200 around the antenna electrode is 0. It provides a duplexer dielectric filter, characterized in that in the range from 179 degrees.

In addition, the present invention forms a transmitting side electrode (TE) and a receiving side electrode (RE) on the transmitting side and the receiving side dielectric filter (100,200), the antenna electrode (AE) and these transmitting side electrode (TE) and The receiving side electrode RE provides a duplexer dielectric filter, which is formed of a microstrip filter coated with an electrode material on a dielectric.

(Example)

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

First, in the description of the drawings of the present invention, the same reference numerals are assigned to components that perform the same function, and the same concepts will be omitted for repeated and repeated description.

5A and 5B are views illustrating an integrated duplexer dielectric filter manufactured using the integrated dielectric filter shown in FIGS. 1 and 3. Referring to FIGS. 1 and 3, the integrated duplexer dielectric filter shown in FIG. 5 combines the two dielectric filters shown in FIGS. 1 and 3 symmetrically and integrally, and inputs and outputs signals from each dielectric filter. An input stage resonator # 1 or an output stage resonator # 3 is adjacently coupled to each other, and an antenna electrode AE is formed in these coupled regions. Accordingly, the transmitting end dielectric filter 100 having the transmitting end electrode TE is formed at one side around the antenna electrode AE, and the dielectric filter 200 having the receiving end electrode RE is formed at the other side thereof. .

The dielectric filters 100 and 200 extend in one direction with respect to the antenna electrode AE, and the angles θ formed by the dielectric filters 100 and 200 may be varied in a range of 0 to 179 °. . In FIG. 5, the two dielectric filters 100 and 200 are configured based on FIGS. 1 and 3, in particular, FIG. 1, but the transmitting dielectric filter 100 and the receiving dielectric filter 200 need not be symmetrical to each other. Various types of filters, the number of filters, and the installation position of the filters can be changed.

In addition, a stop band resonator (BSR) filter is provided at front ends of the transmitting and receiving dielectric filters 100 and 200 to improve frequency characteristics. The BSR filter may be further provided in the antenna electrode forming region, that is, the left and right sides of the antenna electrode AE, which are combined with the dielectric filters 100 and 200. Meanwhile, in FIG. 5, at least one of the antenna electrode AE, the receiving end electrode RE, and the transmitting end electrode TE is formed of a microstrip filter described in detail below.

6A and 6B are a perspective view and a plan view schematically showing a dielectric filter in an embodiment of the present invention.

As shown in FIGS. 6A and 6B, the dielectric filter includes a first elliptic filter 10 and a second elliptic filter 20. That is, in the dielectric filter of FIG. 1, the first elliptic function filter 10 in which two resonators # 3 and # 4 are formed and the second resonator # 8 and # 9 are further formed. 2 elliptic function filter 20 is combined, each of the first elliptic function filter 10 and the second elliptic function filter 20 forms a dielectric filled therein, and resonates with the dielectric The holes H are formed, but the five resonant holes H, for example, are formed in a zigzag form at a predetermined interval and all in the transverse direction. The coupling electrode CE is patterned on the upper surface of each of the resonance hole H regions for coupling the resonance period, and all regions except the patterned portion are coated with the common electrode GE. In this case, the coupling electrode CE, the inner wall of the resonance hole H, and the common electrode GE are integrally connected. Then, the first elliptic function filter 10 and the second elliptic function filter 20 are combined to manufacture one-piece.

Accordingly, the first elliptic function filter 10 includes an input stage resonator # 1, an intermediate resonator # 2, an intermediate resonator # 3, an intermediate resonator # 4, and an output resonator # 5. The second elliptic function filter 20 includes an input stage resonator # 6, an intermediate resonator # 7, an intermediate resonator # 8, an intermediate resonator # 9, and an output resonator # 10. Dielectric filters (100,200) consisting of one elliptic filter and second elliptic filter are formed.

1 and 3, the input terminal electrode IE and the output terminal electrode OE through which signals are inputted and outputted are coupled to the coupling electrode CE of the input stage resonator # 1 and the output stage resonator # 10. It can be formed adjacent to). At this time, since the complementary relationship between the functions of the input terminal electrode IE and the output terminal electrode OE is the same as in the related art, a detailed description thereof will be omitted. In addition, since the functions of the input stage resonator (# 1) and the output stage resonator (# 10) are also complementarily interlocked accordingly, detailed description thereof will be omitted.

Coupling electrodes CE are formed in each resonator region as described above, and these coupling electrodes CE are spaced apart from each other and patterned. At this time, the input stage resonator # 1 and the resonator # 3 of the first elliptic function filter 10 are negatively coupled according to the elliptic function filter theory, and the intermediate resonator # 3 and the resonator (# 5 is negative coupling, the resonator # 6 and the resonator # 8 of the second elliptic function filter 20 are negative coupling, the resonator # 8 and the output stage resonator (# 10) ), The input stage resonator # 1, the resonator # 3, and the resonator (1) of the first elliptic function filter 10 so that negative coupling can be made, that is, weakly coupled as compared to the coupling between the other resonators. Coupling electrodes formed in regions # 3, resonator # 5, and resonator # 6, resonator # 8, resonator # 8, and resonator # 10 of the second elliptic function filter 20. Reduce the distance between (CE) or reduce the area of mutual opposition.

Therefore, negative coupling between the input stage resonator # 1 and the resonator # 3, between the intermediate resonator # 3 and the resonator # 5, and between the resonator # 6 and the resonator # 8, -k ( 1,3), -k (3,5), -k (6,8), -k (8,10). The resonator # 5 and the resonator # 6 may also be negatively coupled.

7A and 7B are graphs showing the frequency characteristics of the dielectric filter shown in FIGS. 6A and 6B. As shown in FIGS. 7A and 7B, the cutoff attenuation widths A2 of the dielectric filter shown in FIGS. 1 and 3 have the cutoff attenuation widths A2 at high ratios in the transition bands on both sides of the passband. It can be seen that the increase. Through this, a cutoff frequency characteristic having a steeper slope can be obtained. In addition, as shown in FIG. 7A, a steep skirt frequency characteristic may be obtained in both transition bands, and by tuning the resonator, a steeper cutoff frequency characteristic may be obtained in one passband as illustrated in FIG. 7B.

Next, a duplexer dielectric filter formed using the dielectric filter shown in FIG. 6 will be described with reference to FIGS. 8 to 10.

In the description of the duplexer dielectric filter, since the two dielectric filters shown in the present invention are formed in a symmetrical manner, the receiving dielectric filter 200 has reference to the reference numeral of the transmitting dielectric filter 100 ( Reference marks are distinguished from one another in the form of reference numerals, and these reference marks are indicated only when necessary.

 8A and 8B are a perspective view and a plan view schematically showing an integrated duplexer dielectric filter according to the present invention. The integrated duplexer dielectric filter of the present invention shown in FIG. 8 is formed by integrally combining the dielectric filter shown in FIG. 6 with respect to the region where they are coupled, that is, the region where the antenna electrode AE is formed. Accordingly, the transmitting side dielectric filter 100 is formed on one side and the receiving side dielectric filter 200 is formed on the other side of the antenna electrode AE forming region.

FIG. 8 shows a state in which the transmitting dielectric filter 100 and the receiving dielectric filter 200 are arranged in a "U" shape in parallel with each other in parallel with each other with respect to the antenna electrode AE. However, the example in which the dielectric filters 100 and 200 extend in parallel is a specific example of various examples, and if it is expressed differently, θ may be represented as 0 ° in FIG. 5.

Accordingly, the transmitting side dielectric filter 100 and the receiving side dielectric filter 200 illustrated in FIG. 8 may also take various coupling forms as θ is changed within a range of 0 to 179 °. In addition, as described above, the dielectric filters 100 and 200 may extend the length thereof in various ways while increasing or decreasing the number of resonators. Accordingly, although the number of resonators on the filters 100 and 200 is shown in FIG.

Meanwhile, each of the transmitting side dielectric filter 100 and the receiving side dielectric filter 200 forms a dielectric filled therein, and forms resonant holes H in the dielectric, and the five resonant holes H are formed. Transmitting and receiving first elliptic function filter 10 formed in a zigzag shape at a predetermined interval in a lateral direction, and five resonant holes H are successively arranged in the zigzag form at a predetermined interval in a zigzag form. The second elliptic function filter 20 formed on the transmission side and the second side in the direction. The coupling electrode CE is patterned on the upper surface of each of the resonance hole H regions for coupling the resonance period, and all regions except the patterned portion are coated with the common electrode GE. In this case, the coupling electrode CE, the inner wall of the resonance hole H, and the common electrode GE are integrally connected.

In addition, a stop band resonator BSR is coupled to the ends of the transmitting end and the receiving end spaced from the antenna electrode AE. The stop band resonator BSR may be coupled to only one of the transmitting side dielectric filter 100 and the receiving side dielectric filter 200. In addition, the stop band resonator BSR may be coupled to the ends of the transmitting end and the receiving end adjacent to the left and right sides of the antenna electrode AE in the antenna electrode AE forming region.

Preferably, on the duplexer dielectric filter according to the present invention, two or four stop band resonators are respectively coupled on the transmitting dielectric filter and the receiving dielectric filter.

Thus, the reason for providing the stop band resonator (BSR) is to construct a dielectric filter having a steeper slope by providing a plurality of factors of the skirt frequency characteristics. That is, the resonator is tuned so that the skirt frequency characteristic can be provided when necessary by providing a skirt frequency characteristic factor consisting of the first elliptic function filter 10, the second elliptic function filter 20, and the stop band resonator (BSR). It is to obtain a frequency characteristic having a steeper slope.

Accordingly, each of the transmitting dielectric filter 100 and the receiving dielectric filter 200 may be integrated with a skirt frequency characteristic factor by the first elliptic filter 10 and the second elliptic filter 20. It can be seen that a plurality of resonators are naturally formed to increase the attenuation width as manufactured.

Meanwhile, the antenna electrode AE formed at the coupling region of the dielectric filters 100 and 200 is formed of a microstrip filter formed by coating an electrode material on the dielectric. In addition, the transmitting end electrode TE and the receiving end electrode RE, through which signals are transmitted and received, are made of a microstrip filter similarly to the antenna electrode AE.

In the drawing, the antenna electrode AE has a substantially T shape, and the transmitting and receiving electrodes TE and RE are shown to be distinguished by a shape having a plurality of branches, but are not limited to the shape shown in the drawing. It is to be understood that the antenna electrode and the transceiving end electrode may be coated in various shapes as necessary.

Preferably, at least one of the transmitting and receiving terminal electrodes TE and RE and the antenna electrode AE may be formed as a microstrip filter having the plurality of branches. More preferably, the antenna electrode AE, the transmitting end electrode TE, and the receiving end electrode RE may be formed of a microstrip filter coated on a dielectric in a shape having a plurality of branches.

The microstrip filter patterns an electrode on the surface of the dielectric, and coats the electrode except the patterned portion with the common electrode GE so that the electrode coated on the surface of the resonator dielectric and the electrode on the surface are coupled. The principle is to apply.

On the other hand, the microstrip filter is a well-known starting technique as disclosed in "MICROWAVE Engineering" A. Das and SKDas, McGraw Hill 2001, Page 284-288, and the applicants of the present invention Patent Application No. 2003-0074714, "Microstrip Dielectric Filter," discloses a technique for a microstrip dielectric filter based on the technical contents, and the technical contents of this document are incorporated herein.

In addition, coupling electrodes CE are formed in each resonator region as described above, and the coupling electrodes CE are spaced apart from each other and patterned. At this time, the first and second transmission functions of the elliptic filter 10 and the second elliptic filter 20 formed according to the elliptic function filter theory have a negative coupling in a resonance period in which signals are inputted and outputted in the formation region thereof. You lose. That is, in the transmitting side dielectric filter 100, the transmitting side input stage resonator # 1, the transmitting side resonator # 3, the transmitting side resonator # 3, the resonator # 5, and the resonator coupled to the antenna electrode AE Negative coupling between # 6, the resonator # 8, the resonator # 8, and the transmitter side output stage resonator # 10 is performed, and the receiver side dielectric filter 200 couples with the antenna electrode AE. Side output stage resonator (# 1 ') and receiving side resonator (# 3'), receiving side resonator (# 3 ') and resonator (5 #), resonator (# 6') and resonator (# 8 '), resonator ( # 8 ′) and the receiving input stage resonator # 10 are negatively coupled. If necessary, a negative coupling between the resonators # 5 and # 5 'and the balls # 6 and # 6' may also be performed.

9 is a graph showing the frequency characteristics of the integrated duplexer dielectric filter shown in FIG. It can be seen that the cutoff attenuation width A3 appears at a high rate in the transition bands on both the passband and the transmit side, respectively.

FIG. 10 is a graph illustrating the super-freeze frequency characteristics of a transmitter and a receiver having two BSRs of the duplexer dielectric filter according to the present invention, in which a higher-order mode harmonics other than the first resonant frequency are limited within the cutoff frequency.

In the present specification, an embodiment is provided only in the case of an integrated type, but each of the resonators manufactured separately can achieve the object of the present invention by combining each resonator, and in the present embodiment, only the coaxial resonator is given as an example. The dielectric filter and the duplexer dielectric filter can be configured using the above, and a combination of a coaxial resonator and a resonant resonator can be used. In addition, the coupling strength may be adjusted by changing the shape of each resonator, adjusting the distance interval, and the inductor coupling groove. In addition, the coupling direction of at least one resonator may be changed in order to improve not only the in-band frequency characteristic but also the out-band frequency characteristic. This can be seen in Patent Application No. 10-2002-0011214 filed by the Applicant.

As described above, according to the present invention, a dielectric filter and a duplexer dielectric filter are manufactured by connecting a plurality of elliptic function filters having a skirt frequency characteristic factor to have a steep slope in the transition band band in the frequency characteristic while minimizing the insertion loss. As a result, a steeper frequency characteristic can be obtained in the transition band band, the insertion loss is increased, and a compact design can be designed.

In addition, according to the present invention, by applying a microstrip filter to one side of the transceiving-side dielectric filter or a region in which the dielectric filter is coupled, there is an effect of minimizing insertion loss and improving high-order mode harmonics and spurious frequency 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 (18)

A transmission-side dielectric filter 100 composed of a plurality of resonators, Receiving-side dielectric filter 200 composed of a plurality of resonators are coupled to both sides symmetrically or asymmetrically around the antenna electrode formation region The transmitting dielectric filter and the receiving dielectric filter extend in one direction about the antenna electrode AE, and the angles θ formed by both dielectric filters 100 and 200 around the antenna electrode AE range from 0 to 179 °. Within, The transmitting side electrode TE and the receiving side electrode RE are formed on the transmitting side and the receiving side dielectric filters 100 and 200. And the antenna electrode (AE), the transmitting side electrode (TE) and the receiving side electrode (RE) are microstrip filters coated with an electrode material on a dielectric. delete delete The duplexer dielectric filter of claim 1, wherein at least one of the microstrip filters is formed in a shape having a plurality of branches. delete The resonator of claim 1, wherein the plurality of resonators on the transmitting side dielectric filter 100 and the receiving side dielectric filter 200 have a penetrating coaxial resonator, a resonator having one side reentrant resonant hole H, A duplexer dielectric filter comprising a combination of a penetrating coaxial resonator and a resonator having a resonant hole (H) having one side opening, or a resonator of these types. The duplexer dielectric filter according to claim 1, further comprising a stop band resonator (BSR) selectively coupled on the transmitting dielectric filter and the receiving dielectric filter. The coupling electrode of claim 1, wherein when the dielectric of each resonator is integrally formed, a coupling electrode is formed on one surface of an open resonant hole (H) region formed in each of the resonators so that coupling of each resonant period is possible. And a region formed by applying a common electrode to a region excluding the patterned portion. A duplexer dielectric filter is a symmetrical or asymmetrical coupling of a transmitting dielectric filter and a receiving dielectric filter formed by combining a resonator having a perforated coaxial or one-sided resonant hole or other resonators with respect to an antenna stage. In A transmitter-side input stage resonator # 1 coupled to an antenna stage performing signal input / output, a resonator # 2 coupled to and coupled to the input stage resonator # 1, and coupled to the resonator # 2; At the same time, the resonator # 3 having negative coupling with the input stage resonator # 1, the resonator # 4 coupled to the resonator # 3, and the resonator # 4 are coupled to the resonator # 4. A first elliptic filter (# 10) consisting of a resonator (# 5) negatively coupled with # 3); And A resonator # 6 coupled to the resonator # 5, a resonator # 7 coupled to the resonator # 6, and a resonator # 6 coupled to the resonator # 7. A negative coupling with the resonator # 8, a resonator # 9 coupled with the resonator # 8, a resonator # 9 coupled with the resonator # 9, and a negative coupling with the resonator # 8. Transmission-side dielectric filter 100 composed of second elliptic function filter 20 composed of resonator # 10: And A transmitter-side input stage resonator # 1 'coupled to an antenna stage performing signal input / output, a resonator # 2' coupled to and coupled to the input stage resonator # 1 ', and the resonator # 2' A resonator (# 3 ') coupled with the input stage resonator (# 1') and negative coupling with the resonator (# 4 ') coupled with the resonator (# 3') and the resonator (# 4 '). A first elliptic function filter (10 ') including a resonator (# 5') coupled to the resonator (# 3 ') and negatively coupled to the resonator (# 3') at the same time; And A resonator # 6 'coupled with the resonator # 5', a resonator # 7 'coupled with the resonator # 6', and a resonator # 7 'coupled with the resonator # 7' A resonator # 8 'coupled to the resonator # 6', a resonator # 9 'coupled to the resonator # 8', and coupled to the resonator # 9 ' A receiving side dielectric filter 200 composed of a second elliptic function filter 20 'composed of a resonator # 10' and a negative coupling (# 8 '); The transmitting dielectric filter 100 and the receiving dielectric filter 200 extend in one direction with respect to the antenna electrode AE, and the angles θ formed by both dielectric filters 100 and 200 with respect to the antenna electrode AE. Is in the range of 0 to 179 °, The transmitting side electrode TE and the receiving side electrode RE are formed on the transmitting side and the receiving side dielectric filters 100 and 200. And the antenna electrode (AE), the transmitting side electrode (TE) and the receiving side electrode (RE) are microstrip filters coated with an electrode material on a dielectric. delete delete 10. The duplexer dielectric filter according to claim 9, wherein at least one of the microstrip filters is formed in a shape having a plurality of branches. 10. The duplexer dielectric filter according to claim 9, wherein at least one intermediate resonator is further formed between the resonator (# 1, # 1 ') and the resonator (# 10, # 10'). 10. The duplexer dielectric filter according to claim 9, further comprising a stop band resonator (BSR) selectively coupled to the dielectric filter (100) or the dielectric filter (200).  The coupling electrode of claim 9, wherein a coupling electrode is formed on one surface of an open resonance hole (H) region formed in each of the resonators so that the respective resonance period coupling may be performed when the dielectric of each resonator is integrally formed. And patterning and applying a region except the patterned portion to a common electrode. 15. The duplexer dielectric filter according to claim 14, wherein two or four stop band resonators are provided. 17. The duplexer dielectric filter according to claim 16, wherein four stop band resonators (BSR) are provided, one at each end of each dielectric filter (100, 200). 17. The duplexer dielectric filter according to claim 16, wherein two stop band resonators (BSRs) are provided, one at each end of each dielectric filter (100, 200).

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