KR20160027415A - Method for Controlling VSWR of Base Station Antenna - Google Patents

Method for Controlling VSWR of Base Station Antenna Download PDF

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Publication number
KR20160027415A
KR20160027415A KR1020140114097A KR20140114097A KR20160027415A KR 20160027415 A KR20160027415 A KR 20160027415A KR 1020140114097 A KR1020140114097 A KR 1020140114097A KR 20140114097 A KR20140114097 A KR 20140114097A KR 20160027415 A KR20160027415 A KR 20160027415A
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South Korea
Prior art keywords
antenna
standing wave
wave ratio
vswr
characteristic
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KR1020140114097A
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Korean (ko)
Inventor
문영찬
최오석
김인호
소성환
이명식
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주식회사 케이엠더블유
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Priority to KR1020140114097A priority Critical patent/KR20160027415A/en
Priority to PCT/KR2015/006986 priority patent/WO2016032114A1/en
Publication of KR20160027415A publication Critical patent/KR20160027415A/en

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
    • H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition

Abstract

The present invention relates to a method for controlling a voltage standing wave ratio (VSWR) of an antenna by a secondary device in a base station system including a primary device, an antenna, and the secondary device communicating with the primary device. The method comprises the following steps: detecting the VSWR of the antenna; adjusting a VSWR feature of the antenna when the detected VSWR is abnormal; and transmitting an adjustment result to the primary device.

Description

Method of Controlling VSWR of Base Station Antenna}

The present invention can be applied to a wireless access node (BS), a relay station, a small base station (hereinafter referred to as a base station system), which are installed in a mobile communication (PCS, Cellular, CDMA, GSM, LTE, And more particularly to a technology for effectively tuning a VSWR (Voltage Standing Wave Radio) of a base station antenna.

Background Art [2] A base station system of a wireless communication network generally includes an antenna installed at a high position such as a roof or a tower of a building, a base station body installed on the ground (usually bulky and heavy), and a feed cable (feeder cable).

The base station body performs basic transmission and reception RF signal processing operations, and transmits an RF signal through a feed cable. The antenna includes an array of a plurality of transmitting and receiving radiating elements to transmit and receive a radio signal. At this time, in order to reduce signal loss on the feed cable between the base station main body and the antenna, a booster called a Tower Mounted Amplifier (TMA) or a Remote Radio Head (RRH) For example, at the foot of the antenna.

In addition, such a base station system typically includes devices for remotely controlling the state of the radiation beam of the antenna, including, for example, a RET (Remote Electrical Tilt) device for an electronic down tilt angle adjustment , Various antenna line devices (ALD: Antenna Line Device), and the like. In this case, an antenna interface standards group (AISG) protocol is used for antenna control in the base station main body, and it is interoperable with the 3GPP (3rd Generation Partnership Project) standard.

In the base station system, a variety of diagnostic equipment for measuring the radiation performance and characteristics of the antenna and determining whether the equipment is in a normal state or a malfunction state may be installed. For example, a VSWR (Voltage Standing Wave Ratio) is detected to determine whether or not it is in a normal state. That is, the antenna includes a measurement unit for measuring the VSWR, and when the base station body receives the measurement signal of the VSWR measurement unit and is considered to be in a non-steady state, the alarm signal information is generated accordingly. The generated alarm signal information is provided to the provider through the base station controller and the like. Thereafter, operations such as checking and replacing the base station antenna regarded as not in the normal state are performed.

However, in order to inspect and replace the base station antenna considered to be in a non-steady state, the normal installation worker directly checks and replaces the base station system installed in the area, resulting in difficulties in operation and an increase in the time required for the operation.

The present invention aims at automatically optimizing the VSWR matching of the base station antenna and normalizing the VSWR characteristics, thereby eliminating the inconvenience of checking and replacing the base station antenna, and minimizing resource waste such as manpower, time and cost do.

To this end, one embodiment of the present invention is a base station system including a primary device and a secondary device that includes an antenna and communicates with the primary device, The method comprising: detecting a standing wave ratio of the antenna, the method comprising: detecting a standing wave ratio of the antenna; Adjusting a standing wave ratio characteristic of the antenna when the detected standing wave ratio is in an abnormal state; And transmitting the adjustment result to the main device.

The step of adjusting the standing wave ratio characteristic of the antenna may include: transmitting the detected standing wave ratio to the main device; Receiving a standing wave non-control command from the main device; And adjusting the standing wave ratio characteristic of the antenna based on the control command. The transmitting of the adjustment result may include detecting the adjusted standing wave ratio and transmitting the adjusted standing wave ratio to the main device.

Alternatively, the auxiliary device may determine, based on a control command from the main device, whether the detected standing wave ratio is in a normal state, and then, until the standing wave ratio of the antenna becomes a steady state, And the step of regulating the standing wave ratio characteristic may be repeatedly performed. Here, the auxiliary device may receive a request signal requesting the standing wave ratio control of the antenna from the main device, and may repeatedly perform the detecting step and the standing wave non-characteristic adjusting step of the antenna in response to the received request signal have. When the standing wave ratio of the antenna does not become a normal state, an alarm signal can be transmitted to the main device.

Meanwhile, in the step of adjusting the standing wave ratio characteristic of the antenna, the auxiliary device can change the electrical characteristic of the internal feed line to adjust the standing wave ratio characteristic of the antenna. For example, by moving the line variable portion by the driving portion, the coupling region between at least one stub extending in the radial direction from the internal feed line and at least one auxiliary line provided in the line variable portion is adjusted, The capacitance of the line can be adjusted. Alternatively, the auxiliary device may adjust the impedance characteristic of the internal feed line by moving a dielectric surrounding a part of the internal feed line in a longitudinal direction of the internal feed line by a driver.

In addition, in the step of adjusting the standing wave ratio characteristic of the antenna, the auxiliary device may change the transmission / reception characteristics of the radiating element to adjust the standing wave ratio characteristic of the antenna. For example, the auxiliary device can change the transmission and reception characteristics of the radiating element by moving the beam forming auxiliary made up of a thin metal body along the radial direction of the radiating element by a radially spaced distance of the radiating element .

According to the present invention described above, the VSWR matching of the base station antenna can be automatically optimized. That is, the present invention can improve the VSWR variation that may occur randomly after connecting the feed cable of the antenna and each equipment in the field through the internal tuning of the antenna. In addition to the initial installation, The VSWR variation can also be improved. By optimizing the VSWR matching in the present invention as described above, the efficiency of the overall system is also improved, and alarm generation due to VSWR degradation in the field can be reduced.

Accordingly, the present invention minimizes work for checking and replacing the base station antenna, minimizing labor, time and cost, and reducing resource waste due to replacement of the base station antenna.

Also, based on the AISG protocol, the eNodeB or the BTS can control and monitor the stationary wave mismatching tuner device, thereby enabling effective base station operation.

1 is a configuration diagram of a base station system according to an embodiment of the present invention;
2 is a configuration diagram of a base station system according to another embodiment of the present invention,
3 is a configuration diagram of a base station system according to another embodiment of the present invention,
4 is a configuration diagram of a base station system according to another embodiment of the present invention.
5 is a flowchart schematically illustrating a method of controlling VSWR characteristics of an antenna according to an embodiment of the present invention,
6 is a view for explaining a method of controlling VSWR characteristics of an antenna according to the first embodiment of the present invention,
7 is a view for explaining a method of controlling VSWR characteristics of an antenna according to a second embodiment of the present invention,
8 is a detailed structure of a first example of the VSWR converter and the driving unit,
Fig. 9 is an equivalent circuit diagram of the VSWR converting unit of Fig. 8,
FIG. 10 is a second exemplary detailed structure of the VSWR converting unit and the driving unit,
11 is a view for explaining the principle of the VSWR converting unit of FIG. 10,
12 is a detailed structural diagram of a third example of the VSWR converting unit and the driving unit.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals whenever possible, even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a configuration diagram of a base station system according to an embodiment of the present invention.

Referring to FIG. 1, a base station system according to an embodiment of the present invention includes an assistant device 1, an eNodeB 2 of an LTE (Long Term Evolution) system, and a remote radio head 3 (RRH) as a main device.

The assistant device 1 includes an antenna including at least one radiating element 11 for transmitting and receiving a radio signal and a radiating plate 10 on which the radiating element 11 is installed, an antenna having a Voltage Standing Wave Ratio (VSWR) And a matching tuner device 20 for controlling or adjusting the tuner 20. The auxiliary device 1 may further include an antenna line device (ALD: Antenna Line Device) such as RET (Remote Electrical Tilt) 30 for electronically controlling the down tilt angle of the antenna have. Although RET is illustrated in FIG. 1, the present invention is not limited to this, and an antenna line device such as Remote Azimuth Steering (RAS) for remote azimuth steering adjustment and Remote Azimuth Beamwidth (RAB) And the like.

The eNodeB 2 is a hardware system for terminating connection with a mobile terminal in an LTE system. The eNodeB 2 is connected to the RRH 3 as a main device through an optical cable. The eNodeB 2 is connected to a common public radio interface (CPRI) or an open baseband remote radiohead interface (OBSAI) And communicates with the RRH 3 according to the communication standard.

The RRH 3 converts various control signals received from the eNodeB 2 into an Antenna Interface Standards Group (AISG) signal and transmits it to the assistant device 1 and converts the signal from the assistant device 1 into a signal suitable for the optical cable And transmits it to the eNodeB 2. The RRH 3 is connected to the auxiliary device 1 via a feed cable (or feeder line) and an AISG cable. The RRH 3 transmits and receives DC signals and RF signals through a feed cable, Control signals and various other operation related signals.

The matching tuner device 20 provided in the assistant device 1 converts VSWR characteristics of the corresponding antenna 1 by converting the electrical signal transmission characteristics of the internal feed line or the radiating element transmission / reception characteristics by external driving, A VSWR detector 21 for detecting a VSWR of the antenna 1 and generating detection signal information according to the VSWR of the antenna 1, When the VSWR characteristic is determined to be abnormal according to the detection signal information generated by the VSWR detection unit 21, the control unit 20 controls the operation of the driving unit 23 to control the conversion operation of the VSWR characteristic of the VSWR conversion unit 24 And a control unit 22 for controlling the operation of the apparatus.

1, various signals transmitted between the matching tuner device 20 and the RRH 3 are transmitted through an AISG cable 6 connected to an antenna line device such as the RET 30, It can be transmitted and received according to the standard.

However, the present invention is not limited to this, and it is also possible to use the feed cable 5 without using the AISG cable 6 according to the implementation method. For example, as shown in FIG. 2, in the case of the auxiliary device 1 not including the antenna line device, the matching tuner device 20 and the RRH 3 can transmit and receive various signals through the feed cable. That is, various signals transmitted / received between the matching tuner device 20 and the RRH 3 can be converted into an On-Off Keying (OOK) signal 6 'and transmitted via the feed cable 5.

3 and 4, the eNodeB (2) and the RRH (3) are connected to the BTS (2) and the RRH (3) in the case of a 2G or 3G system other than the LTE system. (Base Transceiver Station) 7 and multiplexers 8 and 9, respectively.

Hereinafter, a method of controlling the VSWR characteristic of the antenna by communicating with the main device 2 in the above-described base station system will be described.

5 is a flowchart briefly showing a method of controlling VSWR characteristics of an antenna according to an embodiment of the present invention.

The assistant device 1 detects the VSWR of the antenna (S510). That is, the control unit 22 provided in the matching tuner device 20 of the assistant device 1 detects the VSWR by controlling the VSWR detecting unit 21 and receives the detected VSWR.

If it is determined that the detected VSWR is out of the normal range (S520), the assistant device 1 adjusts the VSWR of the antenna (S530). That is, the control unit 22 drives the driving unit 23 to perform the conversion operation of converting the VSWR characteristic of the antenna by the VSWR conversion unit 24. [

Subsequently, the assistant device 1 transmits the VSWR adjustment result to the main device 3 (S540).

In S520 of this embodiment, whether or not the VSWR is out of the normal range is determined by the main device, and the auxiliary device 1 can control the VSWR characteristic of the antenna through the control of the main device. Alternatively, the auxiliary device may itself determine whether the VSWR is out of the normal range and automatically control the VSWR characteristics of the antenna. Hereinafter, these two cases will be described with reference to FIG. 6 and FIG. 7, respectively.

6 is a view for explaining a method of controlling the VSWR characteristic of the antenna according to the first embodiment of the present invention.

The control unit 22 provided in the matching tuner device 20 of the assistant device 1 instructs the VSWR detection unit 21 to detect the VSWR and the VSWR detection unit 21 detects the VSWR of the antenna and outputs detection signal information to the control unit 22 (S602). The control unit 22 transmits detection signal information to the RRH 3 (S604). As described above, the control unit 22 can transmit the detection signal information via the AISG cable according to the RS-485 communication standard or through the feed cable as the OOK signal.

The RRH 3 changes the received detection signal information to a signal suitable for the optical cable and transmits it to the eNodeB 2 (S606). The eNodeB 2, which has received the detection signal information, determines whether the VSWR of the antenna is within the normal range (S608). If the VSWR is within the normal range, the VSWR characteristic control procedure is terminated. However, when the VSWR of the antenna is in an abnormal state, the eNodeB 2 transmits a control command for controlling the VSWR of the antenna to the RRH 3 through the optical cable (S610), and the RRH 3 transmits the control command to the AISG And transmits it to the matching tuner device 20 (S612).

The control unit 22 of the matching tuner apparatus 20 that has received the control command drives the driving unit 23 in accordance with the control command in operation S614 and operates the VSWR conversion unit 24 by the driving unit 23, The characteristic is converted (S616).

Thereafter, the control unit 22 detects the VSWR of the antenna through the VSWR detecting unit 21 (S618), and transmits detection signal information on the detected VSWR to the RRH 3 (S620). The RRH 3 transmits the received detection signal information to the eNodeB 2 (S622). Upon receiving the detection signal information, the eNodeB 2 determines whether the detected VSWR is in a normal state (S624).

If the detected VSWR is in a normal state, the eNodeB 2 terminates the VSWR characteristic control procedure. However, if the detected VSWR is in an abnormal state, the eNodeB 2 determines whether it is impossible to convert the VSWR of the antenna into the normal state (S626). For example, the eNodeB 2 determines whether or not the VSWR control operation has been performed for the entire set VSWR conversion range. When the VSWR control operation is performed for the entire predetermined range, it means that it is impossible to convert the VSWR to the normal state, so the eNodeB 2 outputs an alarm signal (S628). If the VSWR control operation has not been performed for the entire predetermined range, the process returns to S610 and the eNodeB 2 is restarted from the step of transmitting a control command for controlling the VSWR of the antenna.

In the first embodiment of the present invention described above, the assistant device 1 controls the VSWR of the antenna under the control of the eNodeB 2 through communication with the RRH 3. The second embodiment of the present invention described below differs from the first embodiment in that the auxiliary device 1 automatically controls the VSWR of the antenna without the control of the external device.

7 is a view for explaining a method of controlling VSWR characteristics of an antenna according to a second embodiment of the present invention.

The eNodeB 2 transmits a request signal (VSWR Automatic tuning request) requesting VSWR control of the antenna to the RRH 3 through the optical cable (S700), and the RRH 3 converts the received request signal into an AISG signal To the matching tuner device 20 of the auxiliary device 1 (S702). The matching tuner device 20 of the assistant device 1 performs the VSWR automatic control procedure after S704 in response to the request signal. However, the scope of the present invention is not limited thereto, and S700 and S702 may be omitted according to the implementation method. For example, the matching tuner device 20 may perform the VSWR automatic control procedure after S704 at predetermined intervals without receiving the request signal from the RRH 3. [

The controller 22 of the matching tuner device 20 detects the VSWR of the antenna through the VSWR detector 21 (S704), and determines whether the detected VSWR is in a normal state (S706).

If the detected VSWR is in a normal state, the VSWR automatic control procedure is terminated. However, if the detected VSWR is abnormal, the control unit 22 drives the driving unit 23 (S708), and the VSWR converting unit 24 converts the VSWR of the antenna by driving the driving unit 23 (S710) .

Thereafter, the control unit 22 re-detects the VSWR of the antenna through the VSWR detecting unit 21 (S712), and then determines whether the re-detected VSWR is in a normal state (S714). If it is determined as a normal state, the control unit 22 ends the VSWR automatic control procedure. However, if the re-detected VSWR is in an abnormal state, it is determined whether it is impossible to convert the VSWR of the antenna to the normal state (S716). As described with reference to FIG. 6, whether or not the VSWR of the antenna can be converted into the steady state can be determined from whether or not the VSWR control operation has been performed for the entire predetermined VSWR conversion range. That is, when the VSWR control operation is performed for the entire predetermined VSWR conversion range, the controller 22 determines that it is impossible to convert the VSWR of the antenna to the normal state, generates an alarm signal, and transmits the alarm signal to the RRH 3 S718). The RRH 3 transmits the received alarm signal to the eNodeB 2 (S720).

Hereinafter, various implementations of the driving unit 23 and the VSWR converting unit 24 provided in the matching tuner device 20 will be described.

FIG. 8 is a detailed structure diagram of a first example of the VSWR converter and the driving unit, and FIG. 9 is an equivalent circuit diagram of the VSWR converter of FIG. 8 and 9, a VSWR converter according to an embodiment of the present invention includes first and second stubs (not shown) provided in feeding lines (FL) connected to a radiating element (S1, S2); First and second auxiliary lines 242a and 242b connected to the first and second stubs S1 and S2 in a capacitive coupling manner; The first and second auxiliary lines 242a and 242b are supported by a drive motor 232 that is a main component of the drive unit 23 so that the amount of capacitance coupling And a line variable portion 242 having a structure.

The first and second stubs S1 and S2 extend in the radial direction of the feed line and the first and second auxiliary lines 242a and 242b extend in the direction in which the first and second stubs S1 and S2 extend And are installed in the same direction. At this time, the first and second stubs S1 and S2 and the first and second auxiliary lines 242a and 242b are formed so that the two ends of the first and second stubs overlap each other and have the capacitance coupling region c. In FIG. 8, the area A enlarged by the circular one-dot chain line shows a side structure of the second stub S2 and the second auxiliary line 242b.

The moving direction of the line variable portion 242 is configured to move in accordance with the direction in which the first and second stubs S1 and S2 are laid. At this time, the rotational force of the driving motor 232 And may be configured to move the line variable portion 242 left and right. Is configured to vary the capacitance coupling region (c) between the first and second stubs (S1, S2) and the first and second auxiliary lines (242a, 242b) as the line variable portion (242) moves. Also, the first and second stubs S1 and S2 are designed to have a distance of? / 8 relative to the processing frequency.

The inductor component generated by the first and second stubs S1 and S2 and the first and second auxiliary lines 242a and 242b and the inductance component generated by the first and second stubs S1 and S2 and the first , And the variable capacitance component due to the variable capacitance coupling region (c) between the first and second auxiliary lines 242a and 242b, the frequency matching is performed based on the VSWR standard.

That is, the standing wave ratio means a height ratio of a standing wave generated by reflection at the antenna end (i.e., a fixed waveform generated by combining traveling and reflected waves). In a specific frequency band, the VSWR characteristic deviates from the normal range . In this case, when the matching operation is performed using the VSWR matching tuner apparatus having the above-described structure, the VSWR characteristic can be adjusted to within the normal value in the frequency band out of the normal range, while the standing wave is varied.

In the VSWR characteristic tuning method according to the present invention, VSWR tuning operation can be performed in a relatively small range. However, such a fine tuning operation may be very useful in a real environment.

In more detail, generally, in an initial installation of a base station system, an auxiliary device including an antenna is installed on a support, and an auxiliary device and an RRH are connected through a feed cable. It is often the case that the above-described VSWR is measured as abnormal when the final connection is made. This is largely due to cumulative tolerances due to the manufacture of each equipment by different manufacturers, and in this case the problem can be solved by fine adjustment of the characteristics.

Likewise, due to slight changes in the structure / performance of the internal devices of the antenna and the connection state between the respective devices, not only in the initial installation but also in the change of usage environment (climate, such as temperature and weather), the VSWR characteristic is out of the normal range However, even in this case, such a problem can be solved by the configuration and operation according to the feature of the present invention as described above.

Although FIG. 8 illustrates a structure having two stubs S1 and S2 and corresponding two auxiliary lines 242a and 242b, the present invention is not limited thereto, and a structure having one or more stubs It will be possible. The number of stubs and auxiliary lines can be determined according to the bandwidth of the antenna, and the number of stubs and auxiliary lines increases with the wideband.

10 is a detailed structure diagram of a second example of the VSWR converting unit and the driving unit, and FIG. 11 is a view for explaining the principle of the VSWR converting unit of FIG.

10, the VSWR converter according to another embodiment of the present invention includes a dielectric 244a having a high dielectric constant placed on a feed line FL connected to a radiating element (s) within an antenna; And a dielectric moving part 244 which supports the dielectric body 244a and is movable along the feed line FL by driving the driving motor 234 which is a main constituent of the driving part 23. [ In FIG. 10, the A region enlarged by the circular one-dot chain line represents a side structure of the dielectric 244a and the feed line FL in the dielectric moving portion 244. As shown in FIG.

The moving direction of the dielectric moving part 244 is configured to be moved along the direction in which the feed line FL is laid, that is, the length direction of the feed line. At this time, by using the rack and pinion gear structure, The rotational force may be configured to move the dielectric moving part 244. [ The high impedance portion corresponding to the dielectric 244a is changed on the feed line FL by the movement of the dielectric moving portion 244 and the signal path on the feed line FL of the front end portion and the rear end portion of the high impedance portion is changed, Is changed. Through this structure, frequency matching is performed on the VSWR basis.

11, the dielectric moving part 244 is moved along the longitudinal direction of the internal feed line FL, and the length L of the front end portion of the internal feed line FL is determined with reference to the dielectric moving part 244, 1 and the length L 2 of the rear end portion are changed. This change in length changes the impedance of the front end portion of the internal feed line FL and the impedance of the rear end portion. Therefore, the total impedance of the internal feed line FL, which is composed of the impedance formed between the dielectric 244a and the internal feed line, the impedance of the front end portion and the impedance of the rear end portion, is changed, The VSWR characteristic in the frequency band can be adjusted within a normal value.

12 is a detailed structural diagram of a third example of the VSWR converting unit and the driving unit.

The VSWR converter illustrated in FIG. 8 and FIG. 10 is a method of controlling the VSWR of the antenna by converting the electrical characteristics of the internal feed line, whereas the VSWR converter illustrated in FIG. 12 changes the transmission / VSWR is controlled.

Referring to FIG. 12, the VSWR transformer according to another embodiment of the present invention includes a beam forming auxiliary 246 installed at a properly spaced distance in the radial direction of each radiating element 11 of the base station antenna; The beam forming aids 246 are movably supported to move closer to or away from the radiating element 11 and the beam forming aids 246 are moved by driving the driving motors 236, (248: 248a, 248b).

The beam-forming aids 246 may comprise, for example, a thin metal body that is generally circular in shape. When an object having a permittivity is placed on a portion where the beam is radiated from the radiating element 11, the beam forming aid 246 may be provided for enlarging the beam width or the like using the principle that the radiation pattern of the beam is changed. have. At this time, when the distance between the beam forming auxiliary member 246 and the radiating element 11 is changed, the transmitting and receiving characteristics of the radiating element 11 are changed. In the present invention, 11, thereby performing a frequency matching operation on the VSWR basis.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents thereof should be construed as falling within the scope of the present invention.

Claims (12)

In a base station system including a primary device and a secondary device communicating with the main device, the auxiliary device controls a voltage standing wave ratio In the method,
Detecting a standing wave ratio of the antenna;
Adjusting a standing wave ratio characteristic of the antenna when the detected standing wave ratio is in an abnormal state; And
Transmitting the adjustment result to the main device
And a control unit for controlling the control unit. The method according to claim 1,
Wherein the step of adjusting the standing wave ratio characteristic of the antenna comprises:
Transmitting the detected standing wave ratio to the main device;
Receiving a standing wave non-control command from the main device; And
And adjusting a standing wave ratio characteristic of the antenna based on the control command,
Wherein the transmitting the adjustment result comprises:
Detecting the adjusted standing wave ratio and transmitting the detected standing wave ratio to the main device. The method according to claim 1,
Wherein the auxiliary device repeatedly performs the detecting step and the standing wave ratio characteristic adjusting step of the antenna until the detected standing wave ratio is in a normal state and until the standing wave ratio of the antenna becomes a steady state. Control method. The method of claim 3,
Receiving a request signal requesting a standing wave ratio control of the antenna from the main device, prior to the step of detecting the standing wave ratio of the antenna,
Wherein the auxiliary device repeatedly performs the detecting step and the standing wave ratio characteristic adjusting step of the antenna in response to the request signal. The method of claim 3,
Wherein the transmitting the adjustment result comprises:
And transmitting an alarm signal to the main device when the standing wave ratio of the antenna does not become a normal state. The method according to claim 1,
Wherein the step of adjusting the standing wave ratio characteristic of the antenna comprises:
Wherein the electrical characteristic of the internal feed line is changed. 6. The method of claim 5,
Wherein the electrical characteristic is a capacitance of the internal feed line. 8. The method of claim 7,
Wherein the auxiliary device comprises:
And a coupling region between at least one stub extending in the radial direction from the internal feed line and at least one auxiliary line provided in the line variable portion is controlled by moving the line variable portion by the driving portion. Standing wave ratio control method. 9. The method of claim 8,
Wherein the number of the stubs and the auxiliary lines is determined according to a bandwidth of the antenna. The method according to claim 6,
Wherein the auxiliary device comprises:
Wherein the impedance characteristic of the internal feed line is adjusted by moving the dielectric on the internal feed line in the longitudinal direction of the internal feed line by the driving unit. The method according to claim 1,
Wherein the step of adjusting the standing wave ratio characteristic of the antenna comprises:
And the transmission and reception characteristics of the radiating element are changed. 12. The method of claim 11,
Wherein the auxiliary device comprises:
Characterized in that the transmitting and receiving characteristics of the radiating element are changed by moving a beam forming auxiliary provided at a distance spaced apart in the radial direction of the radiating element along a radial direction of the radiating element by a driving part, Way.
KR1020140114097A 2014-08-29 2014-08-29 Method for Controlling VSWR of Base Station Antenna KR20160027415A (en)

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PCT/KR2015/006986 WO2016032114A1 (en) 2014-08-29 2015-07-07 Method for controlling voltage standing wave ratio from base station antenna

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WO2020028042A1 (en) * 2018-07-31 2020-02-06 Advanced Micro Devices, Inc. Transmitter dynamic rf power control via vswr detection for wireless radios

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