KR101374930B1 - Apparatus and method for compensating passband flatness using rf switch - Google Patents

Abstract

The present invention relates to a flatness control device and method using an RF switch. Especially, the flatness control device according to the present invention comprises; a variable low pass filter which controls the flatness of an input signal having a right-upward waveform so that right-upward waveform goes down, and outputs the input signal; a variable high pass filter which controls the flatness of an input signal having a left-upward waveform so that the left-upward waveform goes down, and outputs the input signal; a by-pass unit which outputs the inputted signal with a by-pass; a first switch unit which connects at least one among the variable low pass filter, the variable high pass filter, and the by-pass unit to an input terminal according to a switching control signal; and a second switch unit which connects at least one among the variable low pass filter, the variable high pass filter, and the by-pass unit to an output terminal according to the switching control signal. [Reference numerals] (20) First switch unit; (21) Second switch unit; (22) Variable low pass filter; (23) Variable high pass filter; (24) By-pass unit; (AA) Input; (BB) Output

Description

Flatness control device and method using RF switch {Apparatus and Method for Compensating Passband Flatness using RF switch}

The present invention relates to a flatness control device and method, and more particularly, a circuit for flatness control, in which a flatness of an RF signal (hereinafter referred to as an RF switch) and an input signal distorted to an idol is obtained. It is configured to include a filter for adjusting the degree and a filter for adjusting the flatness of the input signal distorted to the upper left, and can be used to adjust the flatness variably for the input signal distorted to the upper left or right by using the RF switch The present invention relates to a flatness control apparatus and method using an RF switch.

In general, as the information society has recently entered, free communication is possible anytime and anywhere, and technology for improving call quality has been developed accordingly.

Currently, repeaters developed to improve the call quality of mobile communication and overcome communication blind spots are installed in various areas. Such a repeater receives a base station signal received from an antenna through a duplexer, enters a downlink, is amplified by an amplifier, and then synthesized by an output duplexer and radiated through a antenna to a shadow area. In contrast, the subscriber signal in the shaded area is input to the duplexer, amplified by the uplink amplifier and power amplifier and radiated toward the base station. Therefore, each signal is simultaneously transmitted through two paths to provide a call service in a shaded area.

This type of repeater detects a signal by a band pass filter and amplifies the detected signal in an amplifier, thereby providing a communication service in a small area isolated or isolated from the outside.

When the conventional repeater has a poor gain flatness for the band pass filter, it becomes difficult to detect a corresponding signal or a significant deterioration in signal quality occurs. Therefore, the repeater should be designed to maintain the best gain flatness, but it is expensive and not easy to fabricate the bandpass filter to have the desired gain flatness characteristics. Therefore, in the related art, gain flatness is compensated by constructing a gain flatness compensation circuit when designing a repeater.

On the other hand, in recent years, the domestic and foreign mobile communication service market has shifted from 3G to 4G LTE services, but traffic is on the rise due to the increase of 4G LTE subscribers. Broadband frequency band is required for smooth LTE service. Was done.

 Accordingly, various problems are expected to occur, and in particular, it is expected that the flatness characteristics of the pass band will greatly affect the call quality.

Although the passband flatness is affected by all the components that make up the RF module, especially the surface elastic (SAW) filter and the dielectric filter in the module show the most change, but the bandwidth of the passband is increased to improve the flatness characteristics. In this case, there is a problem in that the attenuation characteristics of the other bands are worse.

Thus, module developers are designing trade-offs for the passband bandwidth and the attenuation characteristics of other bands, modifying matching elements of SAW filters, or adjusting dielectric filters to adjust flatness characteristics.

However, such a flatness control requires a considerable time, and there is a problem in that call quality is deteriorated by distortion of an in-band waveform.

In order to improve the flatness of the current repeater RF module, the flatness is improved by changing the values of the inductor and capacitor, which are impedance matching elements of the internal SAW (Surface Acoustic Wave) filter of the RF module, or by tuning the dielectric filter. The road is improving.

 However, when modifying the matching value of the SAW filter, commercially available inductor and capacitor values are determined and fine adjustment is impossible.

In addition, due to the manufacturing characteristics of the SAW filter, there is a difference in the characteristics of each lot, and the value of the inductor and the capacitor may vary for each module, which may cause a hassle of modifying the value during production.

In addition, since the dielectric filter is delivered after tuning by the operator, but has different waveforms depending on the operator, this also requires a recalibration process. If not possible, excessive tuning has a problem in that the dielectric filter is broken and the dielectric filter needs to be replaced.

Accordingly, the present invention includes an RF switch in a circuit for adjusting flatness, and a flatness adjusting device using an RF switch to variably adjust the flatness of an input signal distorted to the upper left or the upper right using an RF switch. And providing a method.

In addition, the present invention is to modify the matching value of the SAW filter to adjust the flatness of the input signal by adjusting the flatness by selecting the pass filter for adjusting the flatness of the input signal using the RF switch or Another aspect of the present invention is to provide an apparatus and method for adjusting flatness using an RF switch to adjust flatness of an input signal without modifying values of inductors and capacitors that may vary for each module.

In addition, the present invention by using the RF switch to select the pass filter for adjusting the flatness of the input signal to pass through it to adjust the flatness without having to readjust the dielectric filter used to adjust the flatness of the input signal The present invention provides an apparatus and method for adjusting flatness using an RF switch to adjust flatness.

In order to solve the above problems, the flatness control apparatus using the RF switch according to the present invention is a variable low pass for outputting after adjusting the flatness is lowered right waveform to the input signal having a right upward waveform filter; A variable high pass filter outputting the left-up waveform lowered with respect to the input signal having the left-up waveform to adjust the flatness; A bypass unit for bypassing the input signal; A first switch unit connecting an input terminal to at least one of the variable low pass filter, the variable high pass filter, and the bypass unit according to a switching control signal; And a second switch unit connecting an output terminal to at least one of the variable low pass filter, the variable high pass filter, and the bypass unit according to a switching control signal.

In addition, the first switch unit according to the present invention is characterized in that the RF switch (RF Switch).

In addition, the second switch unit according to the invention is characterized in that it is composed of RF switches (RF Switch).

In addition, the variable low pass filter according to the present invention is a filter for adjusting the right flatness of the pass band, characterized in that it comprises at least one variable inductor and at least one capacitor.

In addition, the variable inductor according to the present invention is characterized in that it is composed of at least one of the variable inductor or air coil for frequency control.

In addition, the variable low pass filter according to the present invention is characterized in that the bandwidth of the pass band is adjusted by adjusting the variable inductor.

In addition, the variable low pass filter according to the present invention is characterized by comprising a fifth-order low pass filter.

In addition, the variable high pass filter according to the present invention is a filter for adjusting the left flatness of the pass band, characterized in that composed of at least one variable capacitor and at least one inductor.

In addition, the variable high pass filter according to the present invention is characterized in that by adjusting the variable capacitor to adjust the bandwidth of the pass band.

In addition, the variable high pass filter according to the present invention is characterized in that it comprises a high-pass filter of the fifth order.

In addition, the bypass unit according to the present invention is characterized by consisting of at least one capacitor.

In addition, the flatness adjusting apparatus according to the present invention controls the RF switch of the first switch unit and the second switch unit to be connected to the bypass unit to check the waveform of the input signal, the input signal is the first switch The input signal passes through the variable low pass filter according to whether the waveform of the input signal is passed through the bypass unit and the second switch unit, and according to whether the waveform of the input signal is a waveform that is upwardly upward or leftward upward. Or a control unit for controlling to pass through the variable high pass filter.

The control unit according to the present invention controls the switch of the first switch unit and the second switch unit is connected to the variable low pass filter if the waveform of the identified input signal is upwardly upward waveform so that the input signal is the variable low pass filter It characterized in that the flatness is adjusted through.

The control unit according to the present invention controls the switch of the first switch unit and the second switch unit is connected to the variable high pass filter if the waveform of the checked input signal is a waveform upward left, the input signal is the variable high pass filter It characterized in that the flatness is adjusted through.

In order to solve the above problems, the flatness adjustment method using the RF switch according to the present invention is a variable low pass filter which is a filter for adjusting the right flatness of the pass band, a variable high pass filter for adjusting the left flatness of the pass band A pass filter, a first switch unit connected to one side of an input terminal such that an input signal is output through the variable low pass filter or the variable high pass filter, and the input signal is passed through the variable low pass filter or the variable high pass filter A flatness adjusting device configured to include a second switch unit connected to one side of an output terminal to be output, checking a waveform of an input signal, and if the waveform of the checked input signal is upwardly upward, A first switch unit and a second switch unit are connected to the variable low pass filter so that the input signal is Passing through the variable low pass filter to adjust the flatness and outputting the waveform; and if the checked input signal waveform is left upward, the input signal passes through the variable high pass filter through the variable high pass filter. It characterized in that it comprises a process for outputting after the flatness is adjusted.

The present invention includes a filter for adjusting the flatness of the input signal distorted to the upper right and a filter for adjusting the flatness of the distorted input signal to the upper left in the flatness control module for adjusting the flatness By using the RF switch according to the distortion state of the input signal, the input signal is passed through the filter to compensate for the output.

As described above, when the passband flatness is distorted to the upper left or the upper right, the flatness can be adjusted to a desired waveform by adjusting the variable inductor, the air coil, and the variable capacitor, and optionally the flatness using the RF switch. By adjusting, it is possible to reduce the time required, improve mass production, and finely adjust the flatness, thereby improving the call quality.

In addition, since the flatness direction is selected and adjusted according to the distortion state of the input signal using the RF switch configured in the flatness adjustment module according to the present invention, there is an advantage that the adjustment can be performed without replacement of parts.

The present invention allows the input signal to pass through the variable low pass filter through the RF switch when the input signal is distorted to the upper right, and the input signal passes through the variable high pass filter through the RF switch when the input signal is distorted to the upper left. In this case, the flatness can be adjusted without modifying the values of the inductor and the capacitor constituting the pass filter.

In addition, the present invention has the effect of improving the flatness by overlapping the two waveforms by switching the RF switch in the direction of the filter in the reverse phase of the distorted waveform of the input signal.

1 is an internal configuration diagram of a flatness adjusting apparatus using an RF switch according to an embodiment of the present invention.
2 is a circuit diagram of a flatness control module using an RF switch according to an embodiment of the present invention.
3 is a diagram illustrating a circuit diagram in which an input signal is a signal having a waveform which is upwardly raised, and is compensated by switching to a variable low pass filter with an RF switch. Referring to FIG.
4 is a diagram illustrating a circuit diagram in which an input signal is a signal having a left-upward waveform and is compensated by switching to a variable high pass filter using an RF switch. Referring to FIG.
5 is a diagram illustrating a circuit diagram for outputting an input signal without compensation by switching to a bypass unit with an RF switch to confirm a waveform of an input signal according to an exemplary embodiment of the present invention.
6 is an exemplary diagram for explaining a mutually compensated bandpass filter for explaining an embodiment of the present invention.
7 is a flowchart illustrating a process for adjusting the flatness of an input signal using an RF switch according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. This is to omit the unnecessary description so as to convey the key of the present invention more clearly without fading. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

The terms or words used in the specification and claims described below should not be construed as being limited to ordinary or dictionary meanings, and the inventors are appropriate as concepts of terms for explaining their own invention in the best way. It should be interpreted as meanings and concepts in accordance with the technical spirit of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

The present invention is an equalizer filter for adjusting the flatness using an RF switch, by connecting the variable low pass filter and the variable high pass filter dependently or individually to improve the flatness of the distorted waveform in a wide variable band frequency range, in particular, the present invention In the present invention, an input switch is connected to a variable low pass filter or a variable high pass filter using an RF switch according to a distortion state of an input signal, and thus, a method of adjusting the flatness of an input signal by passing the corresponding filter is provided.

First, a schematic configuration of a flatness adjusting apparatus using an RF switch to which an embodiment of the present invention is applied will be described first with reference to FIG. 1.

1 is an internal configuration diagram of a flatness adjusting apparatus using an RF switch according to an embodiment of the present invention.

Referring to FIG. 1, the flatness adjusting device includes a flat surface including first and second switch units 20 and 21, a variable low pass filter 22, a variable high pass filter 23, and a bypass unit 24. The control module 110 may include a control unit 100, a storage unit 120, a key input unit 130, and a display unit 140.

First, the flatness control module 110 will be described with reference to FIG. 2.

Referring to FIG. 2, the flatness adjusting module 110 serves as a circuit used to compensate for gain flatness characteristics. The flatness control module 110 compensates the flatness of the input signal input through the input terminal to output to the output terminal. The flatness control module 110 may include the variable inductors 201 and 202 and the variable capacitors 203 and 204 of the variable low pass filter 22 or the variable high pass filter 23 for determining a pass band of the input signal. 205) and circuit components.

First, the first and second switch units 20 and 21 output an input signal input from the input terminal to the output terminal through the variable low pass filter 22 or the variable high pass filter 23 or the bypass unit 24. do. In this case, the first and second switch units 20 and 21 may include a variable low pass filter 22 or a variable high pass filter 23 in which the input terminal and the output terminal are changed according to the distortion state of the input signal according to the control signal, that is, the control voltage. To pass through the The switch of the first and second switch unit 20, 21 according to the invention is characterized in that it is configured as an RF switch.

The variable low pass filter 22 is a filter for adjusting the flatness of the right side of the pass band and may adjust the bandwidth of the pass band by adjusting the variable inductors 201 and 202 of the variable low pass filter. The variable low pass filter 22 is preferably configured as a fifth order low pass filter. However, the variable low pass filter 22 can change the order of the device according to the setting of the filter. Can be obtained, but the passband loss of the filter may be worse.

At this time, the variable inductor 201, 202 is composed of a variable inductor or air coil for frequency adjustment, when the flatness control is required, by varying the inductance value by turning the variable inductor, opening or narrowing the air coil, the passband bandwidth You will be able to adjust That is, if the variable inductors 201 and 202 are adjusted, the right waveform of the pass band may be reduced or increased.

The variable high pass filter 23 is a filter for adjusting the left flatness of the pass band, and may adjust the bandwidth of the pass band by adjusting the variable capacitors 203, 204, and 205 of the variable high pass filter. The variable high pass filter 23 may be formed of a fifth order high pass filter.

Although the variable high pass filter 23 is preferably configured as a fifth order high pass filter, the variable high pass filter 23 can change the order of the device according to the setting of the filter. Can be obtained, but the passband loss of the filter may be worse. In addition, adjusting the capacitors 203, 204, and 205 may reduce or increase the left waveform of the pass band.

That is, the input signal passes through the low pass filter 22 as described above to determine the right waveform of the pass band, passing through the high pass filter 23 determines the left band of the pass band, and finally the second switch unit By passing through (21), the flatness is improved.

The bypass unit 24 is connected to the first and second switch units 20 and 21 to output the input signal input from the input terminal to the output terminal as it is and check the waveform of the input signal. The bypass unit 24 may be configured as a capacitor as shown in FIG.

The controller 100 is a component for controlling the flatness control module for adjusting the flatness of the input signal, and performs a control operation according to the waveform of the input signal. That is, it is determined whether to switch to the variable low pass filter 22 or to the pass band of the variable high pass filter 23 according to the distortion state of the waveform of the input signal.

The controller 100 first outputs an input signal through the input terminal and the bypass unit 24 through a switch of the first switch unit 20 and the second switch 21 to check the waveform of the input signal. Control to output to the terminal. That is, the controller 100 controls the switch of the first switch unit 20 to be connected to the bypass unit 24 and the bypass unit 24 to be connected to the switch of the second switch unit 21.

As such, a circuit diagram of switching to the bypass unit by using an RF switch to output the input signal without compensation may be illustrated in FIG. 5 to check the waveform of the input signal.

Referring to FIG. 5, the input signal a is output through the first switch unit 20, the bypass unit 24, and the second switch unit 21, and the output signal b is transmitted without distortion. The waveform will be outputted with the same waveform as that of the input signal.

The control unit 100 checks the waveform of the output signal output as described above through the output terminal, and if the waveform of the output signal is a waveform that is upwardly upward, through the left and right upward compensation filter waveforms of the variable low pass filter 22. Control to adjust the flatness by attenuating the upward waveform. To this end, the controller 100 controls the switch of the first switch unit 20 to be connected to the variable low pass filter 22 and the variable low pass filter 22 to be connected to the switch of the second switch unit 21. This allows the input signal to adjust the flatness through the variable low pass filter 22.

As described above, in the case where the input signal is a signal having a right upward waveform, the flatness adjustment operation will be described with reference to FIG. 3.

3 is a diagram illustrating a circuit diagram in which an input signal is a signal having a waveform which is upwardly raised, and is compensated by switching to a variable low pass filter with an RF switch. Referring to FIG.

Referring to FIG. 3, the attenuation of the input signal a having the right upward waveform is attenuated by the variable low pass filter 22 so that the right upward waveform is lowered like the output signal c, thereby adjusting the flatness. It can be seen that.

In addition, if the waveform of the output signal output through the bypass unit 24 is a waveform upward left, the control unit 100 attenuates the waveform left upward through the right upward compensation filter waveform of the low pass filter 23. Control to adjust flatness. To this end, the controller 100 controls the switch of the first switch unit 20 to be connected to the low pass filter 23 and the low pass filter 23 to be connected to the switch of the second switch unit 21. By doing so, the flatness of the input signal is adjusted via the low pass filter 23.

As described above, when the input signal is a signal having a left upward waveform, the flatness adjustment operation will be described with reference to FIG. 4.

4 is a diagram illustrating a circuit diagram in which an input signal is a signal having a left-upward waveform and is compensated by switching to a variable high pass filter using an RF switch. Referring to FIG.

Referring to FIG. 4, when the left bandwidth of the passband is reduced by adjusting through the variable capacitors 203, 204, and 205 of the variable high pass filter 23, the variable high pass filter in a waveform in which the input signal a is left upward. It can be seen that the attenuation is caused by (23) so that the waveform which is left-up like the output signal c is lowered to adjust the flatness.

6 is an exemplary diagram for explaining a mutually compensated bandpass filter for explaining an embodiment of the present invention.

Referring to FIG. 6, (a) is an input signal having a waveform upwardly raised, (b) is a signal of a compensated bandpass filter having a waveform upwardly raised, and (c) is a waveform having a flatness compensated. Is an output signal. In this case, the compensated bandpass filter may be a variable low pass filter 22. That is, the variable low pass filter 22, which is a compensated bandpass filter, generates a compensation signal having an equal inclination and opposite inclination of the input signal having flatness distorted, and a direction in which the flatness of the input signal is compensated. Will print That is, the controller 100 may control the circuit characteristics of the flatness control module 110 so that the gain characteristics of the repeater may have flat characteristics.

The storage unit 120 sets and stores in advance information on whether or not the input signal is switched to the pass band of the variable low pass filter 22 or the variable high pass filter 23 for each waveform.

The key input unit 130 is configured to receive a value for setting the repeater's settings and alarm monitoring and repeater operation.

The display unit 140 displays a setting value and a current state necessary for the control of the controller 100. In addition, the user may check the repeater waveform whose flatness is compensated through the display unit 140.

Next, a process for adjusting the flatness of the input signal using the RF switch in the flatness adjusting device configured as described above will be described with reference to FIG. 7.

7 is a flowchart illustrating a process for adjusting the flatness of an input signal using an RF switch according to an embodiment of the present invention.

Referring to FIG. 7, the controller 100 controls the input signal to be transferred to the second switch 21 by switching to the bypass unit 24 through the first switch 20. At this time, the distortion state is checked through the waveform of the output signal output through the second switch 21 (S700). At this time, the waveform of the output signal will have the same waveform as the waveform of the input signal.

The controller 100 analyzes the waveform of the output signal, that is, the input waveform, and selects a pass filter for adjusting the bandwidth of the pass band (S702). In other words, the controller 100 selects the variable low pass filter 22 when the waveform is upwardly raised. If the waveform is left upward, the variable high pass filter 23 will be selected.

Thereafter, the controller 100 controls the first and second switching units 20 and 21 so that the selected pass filter is connected to the input / output terminal, and the input waveform has a waveform whose flatness is compensated by the selected pass filter. Output as a signal. (S704 ~ S706)

If the waveform of the output signal is upwardly upward, the upwardly upward waveform is attenuated through the leftwardly upward compensation filter waveform of the variable low pass filter 22 to control flatness. To this end, the controller 100 controls the switch of the first switch unit 20 to be connected to the variable low pass filter 22 and the variable low pass filter 22 to be connected to the switch of the second switch unit 21. This allows the input signal to adjust the flatness through the variable low pass filter 22.

In addition, if the waveform of the output signal is a left upward waveform, the control unit 100 controls to adjust the flatness by attenuating the left upward waveform through the right upward compensation filter waveform of the high-side low pass filter 23. To this end, the controller 100 controls the switch of the first switch unit 20 to be connected to the low pass filter 23 and the low pass filter 23 to be connected to the switch of the second switch unit 21. By doing so, the flatness of the input signal is adjusted via the low pass filter 23.

As described above, when the passband flatness is distorted to the upper left or the upper right, the flatness can be adjusted to a desired waveform by adjusting the variable inductor, the air coil, and the variable capacitor, and selectively using the RF switch. By adjusting the flatness can reduce the time required, mass production is improved, fineness can be finely adjusted to improve the call quality.

The flatness adjusting method according to the present invention may be implemented in software form readable by various computer means and recorded on a computer readable recording medium. Here, the recording medium may include program commands, data files, data structures, and the like, alone or in combination. Program instructions to be recorded on a recording medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. For example, the recording medium may be an optical recording medium such as a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, a compact disk read only memory (CD-ROM), a digital video disk (DVD) Includes a hardware device that is specially configured to store and execute program instructions such as a magneto-optical medium such as a floppy disk and a ROM, a random access memory (RAM), a flash memory, do. Examples of program instructions may include machine language code such as those generated by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like. Such hardware devices may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be apparent to those skilled in the art. Furthermore, although specific terms are used in this specification and the drawings, they are used in a generic sense only to facilitate the description of the invention and to facilitate understanding of the invention, and are not intended to limit the scope of the invention.

In addition, a computer program (also known as a program, software, software application, script or code) mounted on an apparatus according to the invention and executing a method for adjusting the flatness according to the invention may be a compiled or interpreted language or a priori or procedural It may be written in any form of programming language, including the language, and may be deployed in any form, including as stand-alone programs or modules, components, subroutines, or other units suitable for use in a computer environment. A computer program does not necessarily correspond to a file in the file system. The program may be stored in a single file provided to the requested program, or in multiple interactive files (e.g., a file storing one or more modules, subprograms, or portions of code) (E.g., one or more scripts stored in a markup language document). A computer program may be deployed to run on multiple computers or on one computer, located on a single site or distributed across multiple sites and interconnected by a communications network.

In addition, in describing the flatness adjusting method according to the present invention, although the operations are described in the drawings in a specific order, it is necessary to perform the operations in the specific order or the sequential order shown in order to obtain a desirable result or in all the views. It should not be understood that the acts performed should be performed. In certain cases, multitasking and parallel processing may be advantageous. Also, the separation of the various system components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and systems will generally be integrated together into a single software product or packaged into multiple software products It should be understood.

The flatness adjusting technology obtained through the present invention is expected to contribute greatly to the improvement of the performance of communication equipment, as well as to the export of equipment having an equalizer filter for adjusting flatness and an equalizer filter for adjusting flatness.

100: control unit 110: flatness control module
120: storage unit 130: key input unit
140: display unit 20: first switch unit
21: second switch 22: variable low pass filter
23: variable high pass filter 24: bypass section
201, 202: variable inductor 203, 204, 205: variable capacitor

Claims (17)

A variable low pass filter for adjusting the flatness of the right upward waveform to flatten the input signal having the right upward waveform;
A variable high pass filter outputting after adjusting the flatness so that the left-up waveform is flat for the input signal having the left-up waveform;
A bypass unit for bypassing the input signal;
A first switch unit connecting an input terminal to at least one of the variable low pass filter, the variable high pass filter, and the bypass unit according to a switching control signal;
A second switch unit connecting an output terminal to at least one of the variable low pass filter, the variable high pass filter, and the bypass unit according to a switching control signal;
Flatness control device using an RF switch comprising a. The method of claim 1, wherein the first switch unit,
Flatness control device using the RF switch, characterized in that consisting of RF switch (RF Switch). The method of claim 1, wherein the second switch unit,
Flatness control device using the RF switch, characterized in that consisting of RF switch (RF Switch). The method of claim 1, wherein the variable low pass filter,
A filter for adjusting the flatness of the right side of the pass band, the flatness adjusting device using an RF switch, characterized in that it comprises at least one variable inductor and at least one capacitor. The method of claim 4, wherein the variable inductor,
Flatness control device using an RF switch, characterized in that composed of at least one of a variable inductor or air coil for frequency control. The method of claim 4, wherein the variable low pass filter,
Flatness control device using an RF switch, characterized in that for adjusting the bandwidth of the pass band by adjusting the variable inductor. The method of claim 1, wherein the variable low pass filter,
A flatness control device using an RF switch, characterized by comprising a fifth-order low pass filter. The method of claim 1, wherein the variable high pass filter,
A filter for adjusting the left flatness of the pass band, the flatness adjusting device using an RF switch, characterized in that composed of at least one variable capacitor and at least one inductor. The method of claim 8, wherein the variable high pass filter,
Flatness control device using an RF switch characterized in that for adjusting the bandwidth of the pass band by adjusting the variable capacitor. The method of claim 1, wherein the variable high pass filter,
A flatness control device using an RF switch, characterized by comprising a fifth-order high pass filter. The method of claim 1, wherein the bypass unit,
Flatness control device using an RF switch, characterized in that composed of at least one capacitor. 3. The method of claim 2,
In order to check the waveform of the input signal, the RF switch of the first switch unit and the second switch unit is controlled to be connected to the bypass unit, and the input signal is connected to the first switch unit, the bypass unit, and the second switch. Verifying the waveform of the signal output through the unit and controlling the input signal to pass through the variable low pass filter or the variable high pass filter according to whether the waveform of the input signal is the waveform of the upward or leftward upward waveform. Control unit;
Flatness control device using an RF switch, characterized in that it further comprises. The method of claim 12, wherein the control unit,
If the waveform of the input signal is upwardly upward, the switch of the first switch unit and the second switch unit is controlled to be connected to the variable low pass filter to adjust the flatness of the input signal through the variable low pass filter. Flatness control device using an RF switch, characterized in that. The method of claim 12, wherein the control unit,
If the waveform of the input signal is a left upward waveform, the switch of the first switch unit and the second switch unit is controlled to be connected to the variable high pass filter to adjust the flatness of the input signal through the variable high pass filter. Flatness control device using an RF switch, characterized in that. A variable low pass filter that is a filter for adjusting the right flatness of the pass band, a variable high pass filter that is a filter for adjusting the left flatness of the pass band, and an input signal is output through the variable low pass filter or the variable high pass filter A flatness adjusting device comprising a first switch unit connected to one side of an input terminal, a second switch unit connected to one side of an output terminal such that the input signal is output through the variable low pass filter or the variable high pass filter. Providing a;
Checking a waveform of an input signal;
If the waveform of the checked input signal is upwardly upward, the first switch unit and the second switch unit are connected to the variable low pass filter so that the input signal passes through the variable low pass filter to adjust flatness and then output the same. Process of doing;
If the waveform of the checked input signal is a waveform of an upward-left waveform, allowing the input signal to pass through the variable high pass filter through the variable high pass filter to adjust flatness and then output the result;
Flatness control method using an RF switch comprising a. The method of claim 15, wherein the first switch unit,
Flatness control method using the RF switch, characterized in that consisting of RF switch (RF Switch). The method of claim 15, wherein the second switch unit,
Flatness control method using the RF switch, characterized in that consisting of RF switch (RF Switch).

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