KR101636219B1 - Correction device and method for variable frequency band - Google Patents

Correction device and method for variable frequency band Download PDF

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Publication number
KR101636219B1
KR101636219B1 KR1020150179064A KR20150179064A KR101636219B1 KR 101636219 B1 KR101636219 B1 KR 101636219B1 KR 1020150179064 A KR1020150179064 A KR 1020150179064A KR 20150179064 A KR20150179064 A KR 20150179064A KR 101636219 B1 KR101636219 B1 KR 101636219B1
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KR
South Korea
Prior art keywords
channel
correction
frequency
gear
center frequency
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KR1020150179064A
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Korean (ko)
Inventor
강성민
이병찬
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한국공항공사
주식회사 알림테크놀러지
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Priority to KR1020150179064A priority Critical patent/KR101636219B1/en
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/48—Coupling means therefor
    • H03H9/50—Mechanical coupling means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/12—Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency

Abstract

The present invention relates to a correction apparatus and a correction method in a frequency band variable apparatus. A correction device in a frequency band variable apparatus according to the present invention includes an input unit for receiving a channel change command from a user, a first rotation associated with movement of a filter pass band in conjunction with the channel change command, Is changed to a frequency band occupied by the correction channel and a frequency band after correction is shifted to a frequency band occupied by the change channel designated by the command, Section.

Description

TECHNICAL FIELD [0001] The present invention relates to a correction device and a correction method in a variable frequency band device,

The present invention relates to a correction apparatus and a correction method in a frequency band variable apparatus.

The frequency band variable device including the variable bandpass filter in the prior art is configured to vary the resonance frequency of the cavity resonator by converting the rotational motion of the gear driven by the motor by the electric signal into the up, . At this time, the variable resonance frequency can vary the frequency passband of the variable band pass filter. However, mechanical tolerances can occur when the gear rotates.

1 is a view for explaining a mechanism tolerance generated in a gear.

As shown in Fig. 1 (a), the gears can rotate in engagement with each other. Gears have the advantage of generating high torques and are used in variable band pass filters. That is, the higher the gear ratio is, the higher the torque can be generated, so that the gear has an advantage of minimizing the resistance when rotating the rotating body. However, the gears may have gearing tolerances where the gears of the gears are not correctly engaged. That is, the variable band pass filter can be made by making a mechanical clearance tolerance for smooth rotation between gears.

However, such a mechanism tolerance may cause a slight error every time the gear rotates. For example, as shown in Fig. 1 (b), when the gear rotates in the opposite direction in the rotating direction, the gear may not rotate by the mechanism tolerance. At this time, since the mechanism tolerance can not be directly reflected in the entire filter characteristic, a variable error of the frequency pass band can be generated.

Therefore, it is necessary to develop a variable bandpass filter that can compensate for the mechanism tolerance generated between the gears.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to correct a correction channel in a current channel and then move to a change channel, thereby eliminating a mechanism tolerance that may occur when moving from a current channel to a change channel, The probability of occurrence of the error of the error can be reduced.

According to another aspect of the present invention, there is provided a correction apparatus for a frequency band variable apparatus, comprising: an input unit for receiving a channel change command from a user; a gear associated with movement of a filter pass band, The channel compensation unit corrects the pass band to the frequency band occupied by the correction channel and the filter pass band after the correction moves to the frequency band occupied by the change channel designated by the command And a channel changing unit.

In order to accomplish the above object, a correction method in a frequency band variable apparatus includes a step of receiving a channel change command from a user, a step of, in conjunction with the channel change command, Correcting the filter pass band to a frequency band occupied by the correction channel and shifting the filter pass band after the correction to a frequency band occupied by the change channel designated by the command, And a second rotating step.

According to an embodiment of the present invention, by correcting a correction channel in a current channel and then moving the channel to a change channel, a mechanism tolerance that may occur when moving from a current channel to a change channel is removed, .

1 is a view for explaining a mechanism tolerance generated in a gear.
2 is a diagram illustrating a correction system using a correction device in a frequency band variable apparatus according to an embodiment of the present invention.
3 is a block diagram showing a correction apparatus in a frequency band variable apparatus according to an embodiment of the present invention.
4 is a diagram for explaining a process of receiving a channel change command according to an embodiment of the present invention.
FIG. 5 is a diagram for explaining a channel movement process to a correction channel according to an embodiment of the present invention. Referring to FIG.
FIGS. 6 and 7 are views for explaining a process of correcting a filter passband to a correction channel according to an embodiment of the present invention.
8 is a flowchart for explaining a correction process to a correction channel through a correction device according to an embodiment of the present invention.
9 is a diagram illustrating a channel change result through a correction device according to an embodiment of the present invention.
FIG. 10 is a workflow diagram specifically illustrating a correction method in a frequency band variable apparatus according to an embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to or limited by the embodiments. Like reference symbols in the drawings denote like elements.

The correction device and the correction method in the frequency band variable device described herein move the filter pass band to the correction channel before moving to the change channel and then move to the change channel to reduce the error caused by the mechanism tolerance, It is possible to obtain the passband characteristic of the input signal.

2 is a diagram illustrating a correction system using a correction device in a frequency band variable apparatus according to an embodiment of the present invention.

A correction system 200 (hereinafter referred to as a correction system) using a correction apparatus in a frequency band variable apparatus may include a terminal 210 and a frequency band variable apparatus 220.

A correction device 210 (hereinafter referred to as a correction device) in the frequency band variable device can display a GUI (Graphic User Interface) 211 that can control the frequency band variable device 220. The calibrator 210 may be in the form of a computer terminal such as a desk top, a laptop, a smart phone, a tablet PC, etc. connected to the frequency band variable device 220 by wire / have. A more detailed description of the correction device 210 and the GUI 211 will be made with reference to FIG. 3 to be described later.

The frequency band variable device 220 may rotate the motor via the motor control board in accordance with the command transmitted through the GUI 211 in the correction device 210. [ At this time, the frequency band variable device 220 may transmit the signal connection to the correction device 210, which is variable due to the rotation of the motor, to be displayed through the GUI. The frequency band variable device 220 applies a specific signal generated in the RF board to the input port of the filter for the movement from the current channel to the correction channel input from the correction device 210, The state of the filter can be corrected.

3 is a block diagram showing a correction apparatus in a frequency band variable apparatus according to an embodiment of the present invention.

The correction apparatus 300 (hereinafter referred to as a correction apparatus) in the frequency band variable apparatus of the present invention may include an input unit 310, a channel correction unit 320, and a channel change unit 330.

The input unit 310 receives a channel change command from the user. That is, the input unit 310 can receive the channel change command through the GUI displayed on the display. A more detailed description of the process of receiving a channel change command through the GUI will be described with reference to FIG.

4 is a diagram for explaining a process of receiving a channel change command according to an embodiment of the present invention.

The correction device 300 may display a GUI 410 capable of controlling the variable band pass filter. The correction device 300 may display the status for the current channel through the GUI 410. [ In addition, the correction device 300 may receive a channel change command to change from the user.

In addition, the correction device 300 can display the correction process progressed by the internal algorithm in the correction channel in real time. Here, the correction channel may be a channel set for error-free variation to the change channel that the user wishes to change. A more detailed description of the correction channel will be given later through the channel correction unit 320 described later.

The GUI 410 described in FIG. 4 is described as an example, but is not limited thereto. That is, the GUI 410 may include a configuration related to a channel change and a variable band pass filter in addition to the channel change command.

Referring again to FIG. 3, the channel correction unit 320, in conjunction with the channel change command, rotates the gear associated with the movement of the filter pass band by a first rotation and converts the filter pass band into a frequency band occupied by the correction channel . In other words, when the channel change command is input, the channel correction unit 320 can first rotate the gear to correct the frequency band occupied by the correction channel, not the change channel. Here, the correction channel may be a channel capable of minimizing the rotation error caused by the mechanism tolerance of the internal gear of the motor. That is, each time the channel change command is inputted, the channel correction unit 320 corrects the filter pass band to the correction channel so that the desired pass band characteristic can be obtained.

In addition, the channel correction unit 320 may allocate a predetermined number of channels to each of the frequency bands that are continuous with each other but not overlap with each other, and may set any of the unassigned frequency bands as the correction channel. That is, the channel correction unit 320 may set at least one of the current channel and the n channels other than the change channel as a correction channel. A more detailed description will be made with reference to Fig. 5 below.

FIG. 5 is a diagram for explaining a channel movement process to a correction channel according to an embodiment of the present invention. Referring to FIG.

When the current channel 510 having the center frequency of 1.09 GHz is input to the change channel 520 having the center frequency of 1.02 GHz, the channel corrector 320 sets the current channel 510 and the change channel 520, At least one of the frequency bands not included in the correction channel 530 can be set. For example, the channel correction unit 320 can set a correction channel 530 having a center frequency of 1.15 GHz.

Referring again to FIG. 3, the channel correction unit 320 may rotate the gear by the first rotation so that the center frequency of the filter passband coincides with the center frequency of the correction channel. That is, the channel correction unit 320 can rotate the gears in a first rotation such that the center frequency of the modified filter passband from the current channel is equal to the center frequency of the correction channel. The process of matching the center frequency to the correction channel will be described with reference to FIG.

5, when the center frequency of the current channel 510 is 1.09 GHz and the center frequency of the correction channel 530 is 1.15 GHz, the channel correction unit 320 determines the center frequency of the filter pass band to be shifted The gear can be rotated first so that it is 1.09 GHz to 1.15 GHz.

3, the channel correction unit 320 sets at least two reference points on a frequency band occupied by the correction channel, and detects a frequency difference from each of the at least two reference points with respect to the filter passband within an allowable range , It can be determined that the center frequency of the filter pass band coincides with the center frequency of the correction channel. That is, when the gear is rotated for the first time, the channel correcting unit 320 can rotate the filter so that the filter pass band approaches the two reference points set on the frequency band of the correction channel. Hereinafter, the channel correction unit 320 will be described in more detail with reference to FIGS. 6 and 7. FIG.

FIGS. 6 and 7 are views for explaining a process of correcting a filter passband to a correction channel according to an embodiment of the present invention.

6, the channel correction unit 320 may set reference points 611 and 612 on the frequency band of the correction channel 610 and the frequency of the stopband frequency and the passband, respectively. For example, the channel correction unit 320 sets 1,148 MHz 611 and 1,152 MHz 612 of the frequency band of the correction channel 610 as a reference point, and uses the frequency difference with the filter passband 620 It is possible to determine whether or not the center frequency coincides with the center frequency.

3, the channel corrector 320 fine-rotates the gear so that the center frequency of the filter pass band is shifted by a unit frequency selected in a direction in which the center frequency of the correction channel is located, If the center frequency of the filter pass band does not coincide with the center frequency of the correction channel, fine rotation about the gear can be repeated. That is, the channel correction unit 320 rotates the gear so that the center frequency of the filter pass band moves in the direction in which the correction channel is located, so as to match the reference point and the center frequency on the correction channel, It is possible to fine-tune the gear to move.

6, the channel correction unit 320 may fine-rotate the gears at a center frequency of the filter passband 620 by a unit frequency 630 selected in the center frequency direction of the correction channel 610 (631). At this time, if the center frequency of the correction channel 610 does not match the center frequency of the filter pass band 620, the channel correction unit 320 may repeatedly fine-rotate the gear by the unit frequency 630 (632 , 633, 634, 635)

3, the channel correction unit 320 calculates the frequency difference between the center frequency of the filter pass band and the center frequency of the correction channel, and when the frequency difference is within the reference dB, . For example, the channel correction unit 320 may calculate the frequency difference for the correction channel at the stop band frequency and the frequency of the filter pass band, and fine-rotate the frequency difference if the absolute value of the difference between the two frequency values is within 30 dB. If the frequency difference is equal to or greater than the reference dB, the channel correction unit 320 determines that the center frequency of the correction channel is coincident with the center frequency of the correction channel, and stops the fine rotation.

Referring to FIG. 7, the channel correction unit 320 can calculate the frequency of the filter pass band and the frequency difference of the correction channel at the reference point 611 every time the gear is finely rotated. The channel correction unit 320 fine rotates the gear by five steps until the absolute value of the calculated frequency difference becomes 30 dB or more so that the filter characteristic in the correction channel moves to the high frequency band from 1 to 5 . As shown in FIG. 7, the channel correction unit 320 can fine-rotate the gears with a frequency difference of -22.408 dB to -28.635 dB. Since the frequency difference is -30.573 dB and is equal to or greater than the reference dB, the channel correction unit 320 can determine that the center frequency coincides with the center frequency of the correction channel.

Referring again to FIG. 3, the channel changing unit 330 makes the second rotation of the gear so that the filter passband after correction moves to the frequency band occupied by the change channel designated by the command. That is, after the center frequency of the filter pass band matches the center frequency of the correction channel, the channel changing unit 330 adjusts the gear to a second rotation such that the filter pass band can move to the frequency band of the change channel in the frequency band of the correction channel. .

5, when the center frequency of the filter pass band coincides with 1.15 GHz, which is the center frequency of the correction channel 530, the channel changing unit 330 changes the center frequency of the filter pass band from 1.15 GHz to the change channel The center frequency of the gear 520 is 1.02 GHz.

That is, when the correction device 300 changes from the current channel 510 to the change channel 520 to be moved, the correction device 300 moves to the correction channel 530 in the middle and performs a correction process, The change channel 520 may change the channel.

Referring again to FIG. 3, the channel changing unit 330 can determine the moving direction of the filter pass band different from the moving direction in the first rotation, and make the second rotation of the gear. That is, if the channel changer 330 has made the first rotation to cancel the mechanism tolerance, the channel changer 330 may second rotate the gear in the opposite direction to the first rotation for movement to the change channel. For example, in the calibration process, the first rotated gear in the clockwise direction is set by the correction channel setting, and the channel changing unit 330 makes the second rotation in the counterclockwise direction, thereby changing the center frequency of the filter pass band to the center frequency of the changing channel Can be matched.

The correction device 300 of the present invention corrects the correction channel in the current channel and then moves the channel to the change channel, thereby eliminating the mechanism tolerance that may occur when moving from the current channel to the change channel, Can be reduced. In other words, when the channel change command is continuously inputted, the cumulative tolerance can generate a passband error of a considerable size. When the channel change command is inputted, the correction apparatus 300 changes the correction channel through the correction channel, It is possible to obtain the pass band characteristic of the desired filter through a detailed correction process.

8 is a flowchart for explaining a correction process to a correction channel through a correction device according to an embodiment of the present invention.

First, the correction device 300 may start the correction when a channel change command is input from the user through the GUI (810). When the gear is moved from the current channel to the correction channel, the correction device 300 can rotate the gear to less than 20 steps of the predetermined rotation amount.

Next, the correction device 300 may generate a PLL signal (820). At this time, the correction device 300 can generate two frequency signals (for example, 1148 MHz, 1152 MHz) in the PLL and apply it to the filter input port.

Next, the correction device 300 may store the values for the two frequency signals (830). That is, the correction device 300 can detect two frequency signals at the filter output port.

Next, the correction device 300 may calculate the difference of the values for the two frequencies (840). At this time, the correction apparatus 300 can determine whether the difference between the two frequency values is 30 dB or more.

If it is 30 dB or less, the correction apparatus 300 can rotate the motor 5 steps (850). By repeating steps 820, 830 and 840 after performing 5 steps of rotation, steps 820 to 840 are repeatedly performed while rotating the motor by 5 steps until it becomes 30 dB or more can do.

If it is 30 dB or more, the correction apparatus 300 can complete the correction (860).

9 is a diagram illustrating a channel change result through a correction device according to an embodiment of the present invention.

9A is a diagram showing a frequency band in the current channel. The correction device 300 can display the frequency band in the current channel through the GUI.

FIG. 9 (b) is a diagram showing the frequency band in the correction channel. The correction device 300 can display the frequency band in the correction channel shifted from the current channel through the GUI.

FIG. 9C is a diagram showing a frequency band in a change channel. The correction device 300 can display the frequency band in the change channel shifted from the correction channel through the GUI.

As shown in FIG. 9, the user can confirm the change process of the channel through the self-diagnosis on the GUI after moving the channel according to the channel change command input.

FIG. 10 is a workflow diagram specifically illustrating a correction method in a frequency band variable apparatus according to an embodiment of the present invention.

First, the correction method in the frequency band variable apparatus according to the present embodiment can be performed by the correction apparatus 300 described above.

First, the correction device 300 receives a channel change command from a user (1010). That is, the step 1010 may be a process of receiving a channel change command through the GUI displayed on the display.

Next, the correction device 300, in conjunction with the channel change command, first rotates the gear associated with the movement of the filter pass band, and corrects the filter pass band to the frequency band occupied by the correction channel (step 1020) . In other words, if the channel change command is input, step 1020 may be a process of first rotating the gear to correct the frequency band occupied by the correction channel, not the change channel. Here, the correction channel may be a channel capable of minimizing the rotation error caused by the mechanism tolerance of the internal gear of the motor. That is, the correction apparatus 300 can correct the filter pass band to the correction channel every time a channel change command is input, thereby making it possible to have a desired pass band characteristic.

According to the embodiment, the correcting device 300 can allocate a predetermined number of channels to each of the frequency bands that are continuous with each other but not at least non-overlapping, and can set any one of the unassigned frequency bands as the correction channel. That is, the correction apparatus 300 can set at least one of the current channel and the n channels other than the change channel as a correction channel. For example, when a channel change command is input to a change channel having a center frequency of 1.09 GHz and a change channel having a center frequency of 1.02 GHz, the correction apparatus 300 corrects the center frequency of the frequency band not included in the current channel and the change channel Is set to 1.15 GHz as a correction channel.

In addition, step 1020 may be the first rotation of the gear so that the center frequency of the filter passband coincides with the center frequency of the correction channel. That is, the correction device 300 can rotate the gears first so that the center frequency of the changed filter passband from the current channel matches the center frequency of the correction channel. For example, if the center frequency of the current channel is 1.09 GHz and the center frequency of the correction channel is 1.15 GHz, then the correction device 300 determines that the center frequency of the filter passband to be moved is 1.09 GHz to 1.15 GHz, .

In addition, the step 1020 sets at least two reference points on the frequency band occupied by the correction channel, and if the frequency difference from each of the at least two reference points to the filter pass band is within the permissible range, It may be determined that the center frequency coincides with the center frequency of the correction channel. That is, when the gear is rotated for the first time, the correction device 300 can make the first rotation so that the filter pass band approaches two reference points set on the frequency band of the correction channel. For example, the correction apparatus 300 can set 1,148 MHz and 1,152 MHz as the reference points in the frequency band of the correction channel, and determine whether the center frequency is coincident with the frequency difference with the filter pass band.

The step of rotating the gear of the step 1020 in the first direction may be performed by fine rotation of the gear so as to move the center frequency of the filter pass band by a predetermined unit frequency in a direction in which the center frequency of the correction channel is located And repeating the fine rotation for the gear if the center frequency of the filter pass band does not match the center frequency of the correction channel. That is, the correction device 300 rotates the gear so that the center frequency of the filter pass band moves in the direction in which the correction channel is located, in order to match the reference point and the center frequency on the correction channel, The gear can be rotated finely.

The fine rotation of the gear in the first rotation step may include calculating a frequency difference between a center frequency of the filter pass band and a center frequency of the correction channel and if the frequency difference is within a reference dB, It may be a process of fine-rotating the gear. For example, the correction device 300 may calculate the frequency difference for the correction channel at the stop band frequency and the frequency of the filter pass band, and fine-rotate the frequency difference if the absolute value of the difference between the two frequency values is within 30 dB. If the frequency difference is equal to or greater than the reference dB, the correction device 300 determines that the center frequency of the correction channel coincides with the center frequency, and stops the fine rotation.

Next, the correction device 300 rotates (1030) the gear so that the filter passband after correction moves to the frequency band occupied by the change channel specified by the command. That is, in step 1030, the center frequency of the filter passband is matched with the center frequency of the correction channel, and then the second rotation of the gear is performed so that the filter passband moves to the frequency band of the change channel in the frequency band of the correction channel Lt; / RTI >

Step 1030 may be a process of determining the direction of movement of the filter passband and making the second rotation of the gear different from the direction of movement in the first rotation. That is, if the correction device 300 has made the first rotation to offset the mechanism tolerance, the gear can be secondly rotated in the opposite direction to the first rotation for movement to the change channel. For example, the first rotated gear in the clockwise direction by the correction channel setting in the calibration process and the second rotation in the counterclockwise direction in the correction device 300 cause the center frequency of the filter passband to coincide with the center frequency of the changing channel .

The correction method of the present invention reduces the error probability of the filter passband by removing the mechanism tolerance that may occur when moving from the current channel to the change channel by moving to the change channel after correcting to the correction channel in the current channel . In other words, when the channel change command is continuously input, the cumulative tolerance can generate a passband error of a considerable magnitude. The correction method is a method of changing a correction channel To obtain the desired passband characteristic of the filter.

The method according to an embodiment of the present invention may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

300: Correction device in a frequency band variable apparatus
310:
320: channel correction unit
330:

Claims (14)

An input unit for receiving a channel change command from a user;
A channel correcting unit operable, in conjunction with the channel change command, to first rotate a gear associated with movement of the filter pass band to correct the filter pass band to a frequency band occupied by the correction channel; And
And a second channel-changing unit for making the second rotation of the gear so that the filter passband after correction moves to a frequency band occupied by the change channel specified by the command.
Wherein the frequency band is variable. The method according to claim 1,
Wherein the channel compensator comprises:
Assigning a predetermined number of channels to each of the frequency bands that are continuous with each other but not at least non-overlapping, and sets any one of the unassigned frequency bands as the correction channel
Correction device in a frequency band variable device. The method according to claim 1,
Wherein the channel compensator comprises:
And the first rotation of the gear so that the center frequency of the filter pass band coincides with the center frequency of the correction channel
Correction device in a frequency band variable device. The method of claim 3,
Wherein the channel compensator comprises:
Wherein at least two reference points are set on a frequency band occupied by the correction channel and if the frequency difference from each of the at least two reference points to the filter pass band is within a permissible range, It is determined that the center frequency coincides with the center frequency of
Correction device in a frequency band variable device. The method of claim 3,
Wherein the channel compensator comprises:
The center frequency of the filter pass band is slightly rotated so as to move the center frequency of the filter pass band by a predetermined unit frequency in a direction in which the center frequency of the correction channel is located, , It repeats the fine rotation for the gear
Correction device in a frequency band variable device. 6. The method of claim 5,
Wherein the channel compensator comprises:
Calculating a frequency difference between a center frequency of the filter pass band and a center frequency of the correction channel, and fine-rotating the gear when the frequency difference is within a reference dB
Correction device in a frequency band variable device. The method according to claim 1,
Wherein the channel changing unit comprises:
The moving direction of the filter pass band is determined so as to be different from the moving direction in the first rotation,
Correction device in a frequency band variable device. Receiving a channel change command from a user;
In response to the channel change command, correcting the filter passband to a frequency band occupied by the correction channel by rotating the gear associated with movement of the filter passband first; And
A second rotation of the gear so that the filter passband after correction moves to a frequency band occupied by the change channel specified by the command
Wherein the frequency band is variable. 9. The method of claim 8,
Assigning a predetermined number of channels to each of the frequency bands that are continuous to each other and not at least non-overlapping; And
Setting any one of the unassigned frequency bands as the correction channel
Wherein the frequency band is variable. 9. The method of claim 8,
Wherein the correcting comprises:
The first rotation of the gear so that the center frequency of the filter passband coincides with the center frequency of the correction channel
Wherein the frequency band is variable. 11. The method of claim 10,
Wherein the correcting comprises:
Setting at least two reference points on a frequency band occupied by the correction channel; And
Determining that the center frequency of the filter passband matches the center frequency of the correction channel if the frequency difference from each of the at least two reference points to the filter passband is an acceptable range
Wherein the frequency band is variable. 11. The method of claim 10,
Wherein the first rotating the gear comprises:
Fine-turning the gear to move the center frequency of the filter pass band by a predetermined unit frequency in a direction in which the center frequency of the correction channel is located; And
Repeating the fine rotation for the gear if the center frequency of the filter pass band does not match the center frequency of the correction channel
Wherein the frequency band is variable. 13. The method of claim 12,
The step of finely rotating the gear includes:
Calculating a frequency difference between a center frequency of the filter passband and a center frequency of the correction channel; And
If the frequency difference is within the reference dB, finely rotating the gear
Wherein the frequency band is variable. 9. The method of claim 8,
Wherein the second rotation of the gear comprises:
Determining a moving direction of the filter pass band different from a moving direction in the first rotation and rotating the gear in a second direction
Wherein the frequency band is variable.
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KR100402068B1 (en) * 2001-05-11 2003-10-17 엘지이노텍 주식회사 A Filter Auto-Controlling System and Methods
KR20050056010A (en) * 2003-12-09 2005-06-14 주식회사 케이엠더블유 Radio frequency bandwidth variable filter
KR20050083251A (en) * 2004-02-21 2005-08-26 삼성전자주식회사 The wideband tunable bandpass filter and multi-band wideband tunable bandpass filter using it

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100402068B1 (en) * 2001-05-11 2003-10-17 엘지이노텍 주식회사 A Filter Auto-Controlling System and Methods
KR20050056010A (en) * 2003-12-09 2005-06-14 주식회사 케이엠더블유 Radio frequency bandwidth variable filter
KR20050083251A (en) * 2004-02-21 2005-08-26 삼성전자주식회사 The wideband tunable bandpass filter and multi-band wideband tunable bandpass filter using it

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