WO2013012275A2

WO2013012275A2 - Diplexer automatic tuning method and device

Info

Publication number: WO2013012275A2
Application number: PCT/KR2012/005789
Authority: WO
Inventors: 안정학; 정종호; 정경일; 김진양; 하병주
Original assignee: 주식회사 에이스테크놀로지
Priority date: 2011-07-20
Filing date: 2012-07-19
Publication date: 2013-01-24
Also published as: KR20130011046A; KR101285022B1; WO2013012275A3

Abstract

Disclosed is an automatic tuning method for a diplexer. The disclosed method is an automatic tuning method for a diplexer provided with a first filtering line and a second filtering line, comprising the steps of: (a) shorting a first resonator of the second filtering line; (b) measuring and reading the S parameter of the first filtering line; (c) extracting the filter parameter of the first filtering line, via the read S parameter; (d) generating tuning control data by comparing a response parameter with the filter parameter of the first filtering line; (e) subjecting the first filtering line to tuning in accordance with the tuning control data; and shorting a first resonator of the first filtering line and subjecting the second filtering line to steps (b) through (e). The disclosed invention is advantageous in that, by using an automatic tuning algorithm on a general filter by means of independent tuning of the filtering lines of the diplexer, diplexer tuning is possible and the diplexer tuning time can be reduced and complexity can be overcome.

Description

Diplexer auto tuning method and apparatus

Embodiments of the present invention relate to an automatic tuning apparatus, and more particularly, to an apparatus for automatically performing tuning of a diplexer or multiplexer.

With the development of mobile communication, the demand for RF devices such as filters, duplexers, diplexers, etc. is increasing. RF devices are used for signal filtering, signal separation and transmission in places such as base stations of mobile communication systems, and diplexers are used to separate signals having different frequency components.

1 is an exploded perspective view showing a structure of a general diplexer to which the present invention is applied, and FIG. 2 is a plan view of a general diplexer to which the present invention is applied.

Referring to FIG. 1, a general diplexer includes a housing 100, an input connector 102, an

output connector

130, 132, a cover 106, a plurality of

cavities

108, 110, 112, 114, and a resonator ( 120, 122, 124, 126).

The diplexer divides the RF signal provided from the input connector 102 into two paths according to frequency, and the

cavity

108 and 110 and the

resonators

120 and 122 filter only the signal of the first frequency band. It functions to output to the first output connector 130, the cavity (112, 114) and the resonators (124, 126) to filter only the signal of the second frequency band and output to the second output connector.

In the present specification, the filtering line consisting of the

cavities

108 and 110 and the

resonators

120 and 122 is referred to as a first filtering line 150, and the first filtering line passes only signals of the first frequency band and signals of other bands. Blocks. In addition, the

cavities

112 and 114 and the resonator 123 and 126 lines are referred to as the second filtering line 152, and the second filtering line passes only signals of the second frequency band and blocks signals of other bands.

Therefore, when the input signal includes signals of two frequency bands, the signal of the first frequency band is output through the path connected to the first output connector 130, and the signal of the second frequency band is output to the second output connector. It is output through the path connected to 132.

Such a diplexer is a structure in which two RF filters for filtering signals of different bands are combined.

Multiple tuning bolts

200, 202, 204, 206, 208, 210 are inserted into the diplexer housing through the cover 106 of the diplexer. The

tuning bolts

200, 202, 204 are tuning bolts for tuning the resonance frequency and bandwidth of the first filtering line 150, and the

tuning bolts

206, 208, 210 are resonances of the second filtering line 152 line. Tuning volts for tuning frequency and bandwidth.

The tuning bolt is divided into a tuning bolt for adjusting the resonant frequency of the diplexer and a tuning bolt for adjusting the filter bandwidth by adjusting the coupling value.

The

tuning bolts

200 and 204 of the first filtering line and the

tuning bolts

206 and 210 of the second filtering line are tuning bolts for adjusting the resonant frequency of the diplexer and positioned above the resonator and adjusting the distance to the resonator. To adjust the resonant frequency of the diplexer. The

tuning bolts

200, 204 are used to adjust the resonant frequency of the first filtering line, and the

tuning bolts

206, 210 are used to adjust the resonant frequency of the second filtering line.

On the other hand, the tuning bolt for bandwidth adjustment is inserted corresponding to the coupling window (160, 162) formed for the resonance period coupling, the tuning bolt 202 is adjusted to the first through the coupling value of the first filtering line The tuning bolt 208 is used to adjust the bandwidth of the second filtering line through adjusting the coupling value of the second filtering line.

3 is a cross-sectional view of a first filtering line of the general diplexer illustrated in FIGS. 1 and 2.

Referring to FIG. 3, the

tuning bolts

200, 204 are penetrated from the cover 106 and positioned above the resonator. The

tuning bolts

200 and 204 may be made of a metal material, and the insertion bolts may be adjusted by rotation because the

tuning bolts

200 and 204 are coupled by a cover and a screw.

Resonant frequency tuning is achieved by varying the distance between the resonator and the

tuning bolts

200, 204, and the

tuning bolts

200, 204 may be rotated by hand, and a separate tuning machine for the rotation of the tuning bolts may be used. It may be. The tuning bolts are held by the nuts if the tuning is done in the proper position.

On the other hand, the tuning bolt 202 for adjusting the bandwidth is also coupled by the cover and screw coupling so that the insertion depth is adjusted by rotation.

Tuning of the diplexer described above was generally performed manually by an operator. Tuning to the desired characteristics by adjusting the insertion depth of the tuning bolt is a task that can be performed only by skilled workers and also has a problem that takes a considerable time.

In order to solve this problem, methods for automatically tuning through tuning algorithms have been attempted. However, since the diplexer is actually a device having two built-in filter modules, there is a problem in that automatic tuning cannot be performed by applying an automatic tuning algorithm of a general RF cavity filter.

In order to solve the problems of the prior art as described above, we propose an automatic tuning method and apparatus that can be applied to a diplexer having a plurality of filter modules.

Other objects of the present invention may be derived by those skilled in the art through the following examples.

According to a preferred embodiment of the present invention to achieve the above object, an automatic tuning method of a diplexer having a first filtering line and a second filtering line, the short resonator of the second filtering line Step (a); (B) measuring and reading the S parameter of the first filtering line; Extracting filter parameters of the first filtering line through the read S parameters; (D) generating tuning control information by comparing a filter parameter of the first filtering line with a reference parameter; (E) performing tuning on the first filtering line according to the tuning control information; And shorting a first resonator of the first filtering line and performing steps (b) to (e) with respect to the second filtering line.

The shorting of the first resonator is performed by electrically contacting the first resonator with a corresponding tuning bolt.

The method may further include generating the tuning control information for adjusting the insertion depth of the tuning bolts of the tuning target device and the tuning order information on the order of tuning the tuning bolts.

In step (d), the filter parameter and the reference parameter of the first filtering line are compared to calculate a difference value, and the tuning is performed by referring to a mapping table that records the frequency change and the coupling value change according to the rotation angle of each tuning bolt. The tuning control information is generated according to an algorithm.

According to another aspect of the present invention, there is provided a method for automatically tuning a multiplexer having a plurality of filtering lines, the method comprising: shorting a first resonator of a filtering line other than the filtering line to be tuned; (B) measuring and reading an S parameter of the target filtering line; Extracting filter parameters of the target filtering line through the read S parameters; (D) generating tuning control information by comparing a filter parameter and a reference parameter of the target filtering line; (E) performing tuning on the target filtering line according to the tuning control information; And setting (f) other filtering lines other than the target filtering line as the target filtering line, and repeating the steps (b) to (e) for each filtering line.

According to another aspect of the present invention, an automatic tuning device of a diplexer having a first filtering line and a second filtering line, the short unit shorting the first resonator of the second filtering line, the first of the second filtering line A network analyzer for measuring the S parameter of the first filtering line after the resonator is shorted and a parameter extraction unit for reading the measured S parameter and extracting the filter parameter of the first filtering line and a filter parameter of the first filtering line; An automatic tuning device of a diplexer is provided that includes a control unit that compares reference parameters to generate tuning control information, and a tuning drive unit that performs tuning on the first filtering line according to the tuning control information.

According to the present invention, it is possible to independently tune the filtering line of the diplexer, thereby enabling the tuning of the diplexer using an automatic tuning algorithm for the general filter, and reducing the tuning time for the diplexer. There is an advantage that can eliminate the complexity.

1 is an exploded perspective view showing the structure of a general diplexer to which the present invention is applied.

2 is a plan view showing a general diplexer to which the present invention is applied.

3 shows a cross-sectional view of the first filtering line of the general diplexer shown in FIGS. 1 and 2.

4 is a diagram illustrating a configuration of an automatic tuning device according to an embodiment of the present invention.

5 is a block diagram showing a configuration of a control unit according to an embodiment of the present invention.

6 is a flowchart illustrating a flow of a diplexer automatic tuning method according to an embodiment of the present invention.

7 illustrates a structure for shorting a first resonator of a specific filtering line in a diplexer according to an embodiment of the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements.

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

Referring to FIG. 4, an automatic tuning device according to an embodiment of the present invention may include a network analyzer 400, a parameter extraction unit 402, a control unit 404, and a tuning drive unit 406.

The tuning target device to which the present invention is applied may include a diplexer or multiplexer in which a plurality of cavities are formed.

In the present invention, an automatic tuning apparatus for independently performing an automatic tuning operation on the first filtering line 150 and the second filtering line 152 in a diplexer as shown in FIGS. 1 and 2 is proposed.

In the conventional automatic tuning of the diplexer, the tuning of the first filtering line and the second filtering line is performed together, resulting in a long overall tuning time. In the present invention, in order to eliminate the complexity of automatic tuning, tuning of the first filtering line and the second filtering line is performed independently.

For such independent tuning, in the network analyzer 400, prior to the parameter measuring operation, the tuning driving unit shortens the resonators of the filtering lines other than the filtering lines to be measured.

In the present invention, the diplexer is mounted on the automatic tuning unit, and then the first resonator of the filtering line other than the filtering line to be measured is shorted to enable independent tuning. According to an embodiment of the present invention, under the control of the control unit, the tuning driving unit 406 may shorten the first notifier of the filtering line other than the filtering line to be measured to enable independent tuning. Here, the first resonator means a resonator closest to the input connector.

For example, if the tuning of the first filtering line is to be performed, the first resonator 124 of the second filtering line is shorted. For this purpose, the first tuning bolt 206 and the first tuning bolt 206 corresponding to the first resonator 124 are shortened. The second resonator 124 is in electrical contact.

After the first resonator 124 of the second filtering line and the corresponding tuning bolt 206 are electrically contacted, an automatic tuning operation of the first filtering line is performed.

On the other hand, when the tuning operation for the second filtering line is to be performed, the first resonator 120 of the first filtering line and the corresponding tuning bolt 200 are electrically contacted and then the tuning operation for the second filtering line. Do this.

In one example, the contact of the tuning bolt and the resonator may be performed by the tuning drive unit 406 rotating the tuning bolt until the tuning bolt is in contact with the resonator.

Of course, it will be apparent to those skilled in the art that the shorting operation through the contact between the tuning bolt and the resonator may be performed by a separate unit other than the tuning driving unit and may be performed manually.

The network analyzer 400 functions to measure filter characteristics of the filtering line (“target filtering line”) to be measured. The network analyzer measures the filter characteristics of the target filtering line after the first resonator short of the other filtering lines is completed. The network analyzer 400 outputs S parameters for input signals and output signals, and the S parameter waveforms are displayed on the display of the network analyzer 400. In the conventional manual tuning, the operator manually tunes while watching the waveform displayed on the display of the network analyzer 400, but the auto tuning device of the present invention analyzes the S parameter measured by the network analyzer 400 and automatically performs tuning. .

The S parameter measured by the network analyzer 400 is digital data, and the S parameter of the full band is output, of which the S parameter of the band of interest is read by the parameter extraction unit 402. Of course, the network analyzer 400 may be set such that only the S parameter of the band of interest is output.

A slicing window may be used to read only data of a band of interest among S parameters output from the network analyzer 400.

For example, when the center frequency of the S parameter read to the network analyzer is 2.2 GHz, the S parameter is read by applying a slicing window around the 2.2 GHz. If the slicing window has a band of 2 GHz, an S parameter of 1.2 GHz to 3.2 GHz is read.

According to a preferred embodiment of the present invention, a method of reading the S parameter by forming a slicing window based on the center frequency of the tuned model device may be used.

The parameter extraction unit 402 reads the S parameter of the band of interest using the slicing window and models the transfer function of the target filtering line. The transfer function of the target filtering line is a function that uses frequency as a variable and has an order corresponding to the number of poles of the target filtering line. The transfer function can be obtained by applying various mathematical algorithms, and since it is a known technique, a detailed description thereof will be omitted.

The parameter extraction unit 402 extracts filter parameters of the target filtering line using the modeled transfer function. In one example, the filter parameter may extract the resonance frequency and the coupling value. The resonant frequency can be extracted by finding the frequency that maximizes the transfer function.

The control unit 404 generates tuning control information for automatic tuning using the filter parameter extracted from the parameter extraction unit 402. Although FIG. 3 shows the parameter extraction unit 402 and the control unit 404 as separate modules, it will be appreciated by those skilled in the art that a single device such as a PC can perform both the operation of the parameter extraction unit and the control unit. It will be self-evident.

The control unit 404 generates control information for adjusting the position of each tuning bolt. For example, when there are three tuning bolts in one filtering line as in the diplexer shown in FIG. 2, the control unit 404 generates control information for adjusting the insertion depth of each tuning bolt.

Since the insertion depth of the tuning bolt is adjusted by rotation, the control information of the control unit 404 is preferably the rotation angle information of each tuning bolt. The control unit 404 can also provide tuning order information for multiple tuning bolts.

The tuning drive unit 406 rotates the tuning bolt according to the tuning control information provided from the control unit 404 to perform tuning for the tuning target device. The tuning drive unit 406 receives rotation angle information about each tuning bolt from the control unit 404, and adjusts the insertion depth of the tuning bolt of the tuning target device by rotating the tuning bolt according to the received control information.

The filter parameter that is changed according to the tuning of the tuning drive unit 406 is monitored by the control unit 404, and when the difference between the measured filter parameter and the filter parameter of the model device is equal to or less than a preset threshold, the control unit 404 adjusts the tuning. Stop tuning when you know it's done.

5 is a block diagram illustrating a configuration of a control unit according to an embodiment of the present invention.

Referring to FIG. 5, a control unit according to an embodiment of the present invention includes a reference parameter storage unit 500, a comparison unit 502, a tuning control information generation unit 504, a tuning sequence information generation unit 506, and a mapping. Table 508 may be included.

The reference parameter storage unit 500 stores the filter parameters of the model device that has been tuned. As mentioned above, the filter parameter may include a resonance frequency and a coupling value.

The comparison unit 502 compares the parameters of the target filtering line provided from the parameter extraction unit 402 with the reference parameters stored in the reference parameter storage unit 500. The comparison unit 502 calculates a difference value between the reference parameter and the parameter of the target filtering line, and the calculated difference value is tuned by the tuning control information generator 504 and the tuning sequence information generator 506. It is used to generate information.

The tuning control information generation unit 504 and the tuning sequence information generation unit 506 generate the tuning control information and the tuning sequence information by using the difference value calculated from the comparison unit 502 and the information in the mapping table 508. In the mapping table, frequency information and coupling value information changed according to the rotation of each tuning bolt are recorded.

The tuning control information generation unit 504 generates control information for adjusting the insertion depth of each tuning bolt based on the mapping table and the difference value information according to the automatic tuning algorithm. The control information for adjusting the insertion depth is preferably information on the rotation angle of each tuning bolt.

As described above, the tuning bolt located above the resonator is a tuning bolt for resonant frequency adjustment, the tuning bolt located in correspondence with the coupling window is a tuning bolt for adjusting the coupling value, and the tuning control information generation unit 404 ) Calculates rotation angle information of each tuning bolt based on the automatic tuning algorithm. Of course, the rotation angle information includes information on whether the rotation angle for moving the tuning bolt up or the rotation angle information for moving down.

The tuning sequence information generation unit 506 generates information on which tuning bolts of the plurality of tuning bolts for which the insertion depth needs to be adjusted are first adjusted. The tuning sequence information generation unit 506 preferably sets the tuning sequence so that the position adjustment for the tuning bolt having a great influence on the tuning is performed first, and the tuning sequence may be set based on an automatic tuning algorithm to be used.

When the automatic tuning operation of the specific filtering line (eg, the first filtering line) is completed by the automatic tuning unit illustrated in FIG. 5, the automatic tuning operation of another filtering line (eg, the second filtering line) is performed. To perform overall tuning of the diplexer. When tuning the second filtering line, the first resonator of the first filtering line is shorted and then a tuning operation is performed.

Referring to FIG. 6, the first filtering line is set as the target filtering line and the first resonator of the second filtering line is shorted (step 600).

When the resonator shorting operation is completed, the S parameter of the target filtering line is measured using a network analyzer (step 602).

If the S parameter of the tuning target device is measured through the network analyzer, the measured S parameter is read by applying a slicing window (step 604). As described above, it is desirable to apply a slicing window based on the center frequency of the model device when reading the S parameter. The S parameter in the slicing window frequency region is read by applying a slicing window having a symmetrical shape based on the center frequency of the tuning model device.

Once the S parameter is read, it is used to model the transfer function of the target filtering line (step 606). The transfer function is a function whose frequency is a variable, and the transfer function is modeled based on the order of the filter. As mentioned above, various mathematical techniques can be used for modeling the transfer function.

Once the transfer function is modeled, it is used to extract the filter parameters (step 608). As mentioned above, the filter parameter may include a resonance frequency and a coupling value.

When the filter parameter of the tuning target device is extracted, the filter parameter of the model device and the filter parameter of the target filtering line are compared (step 610). The information on the difference value is calculated by comparing the filter parameter of the target filtering line with the filter parameter of the model device. That is, difference value information for the resonance frequency difference value and the coupling value with the model device is calculated.

When the parameter difference value information is calculated, the tuning control information and the tuning sequence information are generated using the calculated difference value information (step 612). The parameter difference value and the frequency and coupling change information according to the tuning bolt rotation in the mapping table are applied to the automatic tuning algorithm, and the tuning sequence for the tuning control information including the rotation angle information of each tuning bolt and the tuning sequence information for each tuning bolt. The information is generated. When the tuning control information and the tuning sequence information are generated from the control unit, a tuning operation for adjusting the insertion depth of the tuning bolts is performed by the tuning drive unit based on the tuning control information and the tuning sequence information. The tuning drive unit is provided with a rotation module for holding and rotating each tuning bolt, and rotates the tuning bolt based on the rotation angle information included in the tuning control information. The rotation module may be driven by a motor, and the rotation speed of the motor is set based on the rotation angle information.

The filter parameters of the tuning target device that are changed during the tuning process of the tuning drive unit are monitored, and whether the tuning is completed is determined by whether the difference between the reference parameter and the filter parameter falls below a preset threshold (step 614).

When tuning is not completed by the tuning operation according to the automatic tuning algorithm, the operation of tuning the parameter through new control information is continuously performed.

When the tuning operation for the target filtering line (first filtering line) is completed, the first resonator of the first filtering line is shorted and automatic tuning is performed in the same manner with respect to the second filtering line (step 616).

FIG. 7 illustrates a structure for shorting a first resonator of a specific filtering line in a diplexer according to an embodiment of the present invention.

Referring to FIG. 7, the tuning bolt 710 corresponding to the resonator 700 to be shortened is rotated to electrically contact the resonator 700 and the tuning bolt 710.

If the tuning bolt 710 is not long enough to be in contact with the resonator 700, the tuning bolt 710 may be replaced with a separate tuning bolt for shorting the resonator, and then the resonator shorting operation may be performed.

Since the tuning bolt 710 is in contact with the cover 706 and is electrically grounded, when the tuning bolt 710 is in contact with the resonator 700, the resonator 700 may be electrically shorted.

As described above, the diplexer autotuning method of the present invention can perform autotuning on the filtering lines of the diplexer independently, so that the autotuning method used in the existing filter can still be used. Accordingly, there is an advantage of reducing the time required for tuning the diplexer and enabling simpler tuning.

In the present invention as described above has been described by the specific embodiments, such as specific components and limited embodiments and drawings, but this is provided to help a more general understanding of the present invention, the present invention is not limited to the above embodiments. For those skilled in the art, various modifications and variations are possible from these descriptions. Therefore, the spirit of the present invention should not be limited to the described embodiments, and all the things that are equivalent to or equivalent to the claims as well as the following claims will belong to the scope of the present invention. .

Claims

An automatic tuning method of a diplexer having a first filtering line and a second filtering line,

Shorting a first resonator of the second filtering line (a);

(B) measuring and reading the S parameter of the first filtering line;

Extracting filter parameters of the first filtering line through the read S parameters;

(D) generating tuning control information by comparing a filter parameter of the first filtering line with a reference parameter;

(E) performing tuning on the first filtering line according to the tuning control information; And

And shortening the first resonator of the first filtering line and performing steps (b) to (e) for the second filtering line.
According to claim 1,

And wherein the short of the first resonator is to electrically contact the first resonator and a corresponding tuning bolt.
According to claim 1,

Generating tuning sequence information for adjusting the tuning control information for tuning the tuning bolts and the tuning bolts of the tuning bolts of the device to be tuned, further comprising the step of automatically tuning the diplexer. .
According to claim 1,

In step (d), the filter parameter and the reference parameter of the first filtering line are compared to calculate a difference value, and the tuning is performed by referring to a mapping table that records the frequency change and the coupling value change according to the rotation angle of each tuning bolt. And auto-tuning the diplexer according to an algorithm.
An automatic tuning method of a multiplexer having a plurality of filtering lines,

Shorting a first resonator of a filtering line other than the target filtering line to be tuned (a);

(B) measuring and reading an S parameter of the target filtering line;

Extracting filter parameters of the target filtering line through the read S parameters;

(D) generating tuning control information by comparing a filter parameter and a reference parameter of the target filtering line;

(E) performing tuning on the target filtering line according to the tuning control information; And

And setting the other filtering lines other than the target filtering line as the target filtering line and repeating the steps (b) to (e) for each filtering line.
The method of claim 5,

And wherein the short of the first resonator is an electrical contact between the first resonator and a corresponding tuning bolt.
An automatic tuning device for a diplexer having a first filtering line and a second filtering line,

A short unit shorting the first resonator of the second filtering line

A network analyzer measuring the S parameter of the first filtering line after the first resonator of the second filtering line is shorted

A parameter extraction unit that reads the measured S parameter and extracts filter parameters of the first filtering line;

A control unit configured to generate tuning control information by comparing the filter parameter of the first filtering line with a reference parameter;

And a tuning driving unit configured to perform tuning on the first filtering line according to the tuning control information.
The method of claim 7, wherein

And the short of the first resonator is to electrically contact the first resonator and a corresponding tuning bolt.
The method of claim 7, wherein

After the tuning for the first filtering line is completed, the short unit shorts the first resonator of the first filtering line, and the network analyzer, the parameter extraction unit, the control unit, and the tuning drive unit tune the second filtering line. Automatic tuning device of a multiplexer, characterized in that for performing.