KR101929348B1 - Low PIMD base station antenna having active elements - Google Patents

Low PIMD base station antenna having active elements Download PDF

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Publication number
KR101929348B1
KR101929348B1 KR1020170051548A KR20170051548A KR101929348B1 KR 101929348 B1 KR101929348 B1 KR 101929348B1 KR 1020170051548 A KR1020170051548 A KR 1020170051548A KR 20170051548 A KR20170051548 A KR 20170051548A KR 101929348 B1 KR101929348 B1 KR 101929348B1
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KR
South Korea
Prior art keywords
ground plate
pimd
circuit board
base station
pcb circuit
Prior art date
Application number
KR1020170051548A
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Korean (ko)
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KR20180118356A (en
Inventor
오경섭
김요한
장성우
Original Assignee
주식회사 감마누
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to KR1020170051548A priority Critical patent/KR101929348B1/en
Priority to PCT/KR2018/002813 priority patent/WO2018194265A1/en
Publication of KR20180118356A publication Critical patent/KR20180118356A/en
Application granted granted Critical
Publication of KR101929348B1 publication Critical patent/KR101929348B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/526—Electromagnetic shields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them

Abstract

The present invention relates to a base station antenna apparatus capable of removing a PIMD signal, comprising: a ground plate; One or more radiation elements supported on one side of the ground plate and supported by the ground plate; A power distribution circuit that supplies power to the one or more radiation elements; A PCB circuit board including at least one non-linear element; A plurality of cables connected to the PCB circuit board; Shielding means for shielding the plurality of cables from electromagnetic waves; A plurality of filter means connected to said plurality of cables and said shielding means; And connecting means for connecting the shielding means and the ground plate.
According to the present invention, the PIMD signal generated in the nonlinear element inside the antenna can be removed or remarkably reduced.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a base station antenna apparatus including an active element capable of removing a PIMD signal,

The present invention relates to a base station antenna apparatus capable of removing a PIMD signal, and more particularly, to a base station antenna apparatus capable of removing or significantly reducing a PIMD signal generated in a nonlinear element in an antenna.

In the mobile communication system, intermodulation (IMD) signals may be generated due to mutual interference between the multi-band frequencies of the antennas during high-power transmission through the passive antenna, which is called passive intermodulation (PIMD) Distortion signal. If the PIMD signal is a normal noise signal, and the intermodulation signal of a certain level or more flows into the PIMD signal, the communication system processes the PIMD signal as a data signal, so that the normal signal is distorted and the communication quality is degraded. Therefore, the PIMD signal of the antenna should be suppressed within the appropriate level required by the industry.

On the other hand, the cause of PIMD in RF parts can be divided into contact nonlinearity and material nonlinearity. Causes of contact nonlinearity include junction capacitance due to a thin oxide layer between conductors, tunnel effect due to semiconductor action between conductors in metal contact, micro-discharge due to gap between metals and micro-discharge, dust on metal surface And nonlinearity related to metal particles and shrinkage resistance caused by metal bond. The causes of material nonlinearity are hysteresis effect of nickel, iron, and cobalt, internal schottky effect, And thermal heating by limited conductivity.

This is also true of the PIMD signal generated at the antenna, and it is generally known that the PIMD signal is generated mainly due to incomplete contact at a portion where the metal contacts inside the antenna. Accordingly, in the past, the present invention has focused on a technique for improving the connection stability between a connector, a cable, and a connector and a connection terminal in order to suppress the PIMD signal of the antenna.

A base station antenna has several radiation elements, which limits the service area by creating a narrow beamwidth. In order to adjust the direction of the antenna beam, a method of changing the direction of the antenna mechanically and a motor for adjusting the phase of a signal applied to each of the radiation elements are mounted inside the antenna, and the motor is rotated, And the beam is electrically tilted by giving a phase difference of a predetermined value. At this time, a device that recognizes the direction of the beam and adjusts the motor inside the antenna to a desired angle is called RET (Remote Electrical Tilt). However, since the signal for recognizing the direction of the beam and the signal for controlling the motor are different according to the manufacturer of the antenna, recently, each manufacturer has installed iRET (Integrated Remote Electrical Tilt) inside the antenna. If the circuit board containing the active element (nonlinear element) enters the inside of the antenna, the PIMD signal of the antenna is suppressed to an appropriate level due to the nonlinear characteristic of the active element, unlike the conventional antenna having only the passive element It becomes very difficult.

Until recently, efforts to suppress the PIMD signal of the base station antenna have been mainly performed by the international standardization organization such as the AISG (Antenna Interface Standards Group) as the main problem of the contact and the material. However, in the case of the antenna including the active element It has not yet achieved satisfactory results.

KR 10-1017670 (2011.02.18)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to solve the problems of the conventional PIMD signal removal from the viewpoint of contact and material of cables and connectors, To remove or reduce the PIMD signal of a base station antenna including an active element. Therefore, the object of the present invention is to obtain a result that can satisfy the industry standard that has not been achieved to date with respect to the base station antenna including the active element.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

A base station antenna device capable of PIMD signal cancellation according to an embodiment of the present invention includes: a ground plate; One or more radiation elements supported on one side of the ground plate and supported by the ground plate; A power distribution circuit that supplies power to the one or more radiation elements; A PCB circuit board including at least one non-linear element; A plurality of cables connected to the PCB circuit board; Shielding means for shielding the plurality of cables from electromagnetic waves; A plurality of filter means connected to said plurality of cables and said shielding means; And connecting means for connecting the shielding means and the ground plate.

The shielding means may be a metal foil or a metal braid.

The plurality of copying units may be multi-band copying units for copying signals of different frequency bands.

The ground plate may be a reflector reflecting the power radiated from the radiation means in a specific direction.

The PCB circuit board may further include a ground unit.

According to another embodiment of the present invention, a base station antenna device capable of PIMD signal cancellation includes a ground plate; One or more radiation elements supported on one side of the ground plate and supported by the ground plate; A power distribution circuit that supplies power to the one or more radiation elements; A PCB circuit board including at least one non-linear element and a ground; A plurality of cables connected to the PCB circuit board; And a plurality of filter means connected to each of the plurality of cables and the grounding unit.

The shielding means may be a metal foil or a metal braid.

The plurality of copying units may be multi-band copying units for copying signals of different frequency bands.

The ground plate may be a reflector reflecting the power radiated from the radiation means in a specific direction.

According to the present invention, a PIMD signal generated in a base station antenna including an active element can be removed or remarkably reduced.

According to the present invention, it is possible to meet the industry requirement criteria for the PIMD signal generated in the base station antenna including the active element.

The effects of the present invention are not limited to the above-mentioned effects, and various effects can be included within the scope of what is well known to a person skilled in the art from the following description.

1 shows a principle of generating a PIMD signal in a base station antenna.
FIG. 2 illustrates a base station antenna device including an active device capable of removing a PIMD signal according to an embodiment of the present invention. Referring to FIG.
3 illustrates a base station antenna device including an active device capable of removing a PIMD signal according to another embodiment of the present invention.

The foregoing and other objects, features, and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

The foregoing and further aspects are embodied through the embodiments described with reference to the accompanying drawings. It is to be understood that the components of each embodiment are capable of various combinations within an embodiment as long as no other mention or mutual contradiction exists. Furthermore, the proposed invention may be embodied in many different forms and is not limited to the embodiments described herein.

And, when a part is referred to as "including " an element, it is meant to include the element regardless of other elements, and does not exclude the possibility of including other elements.

In addition, throughout the specification, when a part is referred to as being "connected" to another part, it is not limited to a case where it is "directly connected", but also an "electrically connected" . Further, in the specification, a signal means a quantity of electricity such as a voltage or a current.

Figure 1 illustrates the generation of a PIMD signal at a base station antenna.

Referring to FIG. 1, leakage power is generated behind a ground plate in a power distribution circuit, a radiating element, and the like until a transmission power input to an antenna input port reaches a radiating element of an antenna. This leakage power can be introduced into a cable connecting a signal generator of a motor, a sensor, etc., and a PCB circuit board including nonlinear elements. The signals I1 +, f1 + f2, I1 , f1 + f2 ... I N , f1 + f2 of the two frequency bands input to the PCB circuit board through the cable are connected by nonlinear elements in the PCB circuit board Intermodulation (IMD) The intermodulation (IMD) signal thus generated is again radiated through the cable to the antenna ground plate and the power distribution circuit, thereby distorting the normal signal, thereby degrading the call quality (P 2f 2 -f 1 , P 2f 1 -f 2 ) .

2 is a view illustrating a base station antenna apparatus including an active element capable of removing a PIMD signal according to an embodiment of the present invention.

2, a base station antenna device capable of removing a PIMD signal includes a PCB circuit board 200 electrically connected to the signal generator 10 through a cable 100 and including a plurality of nonlinear devices 210, A grounding part 220 formed on an opposite side of the surface on which the nonlinear element 210 of the PCB circuit board 200 is formed, a grounding plate 300 installed between the grounding part 220 and the radiating element 400, ) And the like.

The cable 100 electrically connects a signal generated by each signal generator 10 such as a motor and a sensor to a pattern (nonlinear device) 210 formed on the PCB circuit board 200, Of the non-linear element 210 of FIG. That is, the cable 100 is electrically connected to the non-linear devices 210 formed on the PCB circuit board 200 to exchange signals.

The cable 100 can reduce the antenna transmission power of f1 + f2 flowing into the nonlinear device 210 to reduce the PIMD generated in the nonlinear device 210 so that the cable 100 can be shielded by metal shielding means 500 and is connected to the ground plate 300 by the connecting means 510. The connecting means 510 may be connected to one or both ends of the shielding means 500 as a ground line.

The PCB circuit board 200 has a plurality of nonlinear elements 210 and the signals generated by the signal generators 10 are transmitted to the nonlinear element 210 of the PCB circuit board 200 through the cable 100 do. The transmission power inputted to the antenna input port is supplied to the PCB circuit board 200 by the leakage power from the radiation element and the power distribution circuit, The signals I 1 +, f 1 + f 2, I 1-, f 1 + f 2 ... I N and f 1 + f 2 are input to the nonlinear device 210 in the PCB circuit board 200 by the IMD signals P 2f 2 -f 1 , 2f1 to generate -f2), PIMD signal generated in the non-linear element 210 is again introduced into the cable 100 is leaked and radiated material in the cable to the power distribution circuit and the radiation device 400 distorts the normal signal.

The filter means 600 may be configured to allow the signals I1 +, f1 + f2, I1 , f1 + f2 ... IN , f1 + f2 flowing into the cable 100 to flow into the non- And is connected to the cable (100) and the cable shielding means (500). That is, the plurality of filter means 600 is connected to the cable 100 through a connection line 610, and the connection line 610 is also connected to the cable shielding means 500. Thus, the filter means 600 transmits the input signals I1 +, f1 + f2, I1 , f1 + f2 ... I N , f1 + f2 via the cable shielding means 500 to the ground plate 300, Thereby suppressing the generation of the PIMD signal.

The filter means 600 is provided for each signal generator, and can be configured variously according to the frequency characteristics. If the desired frequency band can be blocked or passed through, the type of the filter means 600 is not limited. The filters are provided with a number of signal generators and cables and can be connected to each cable.

A radiation element 400 is disposed on one surface of the ground plate 300 and lines for distributing an input signal to the radiation element are formed on the other surface.

The ground plate 300 serves as a reflector so that the power from the radiating element is directed to the front of the antenna and the power distribution circuit (no number) is disposed on the other side of the ground plate.

Hereinafter, the process of removing the PIMD signal from the antenna apparatus will be described.

A power source for driving each signal generator 10 such as a motor and a sensor and signals generated in the signal generator are input to the PCB circuit board 200 via the cable 100. The power is supplied to the PCB circuit board 200 from a radiation element, Leakage power is also transmitted to the nonlinear device 210 of the PCB circuit board 200 through the cable 100. The signals I1 +, f1 + f2, I1 , f1 + f2 ... I N and f1 + f2 of the two frequency bands input from the leakage power and input to the nonlinear device 210 are input to the PIMD signal P 2f 2 - It generates f1, P 2f1 -f2). In the present invention, signals leaked from a radiating element, a power distribution circuit, and the like and flowed into the cable 100 are filtered by the filter means 600 and flowed to the ground plate 300 through the ground line 510, Can be prevented from being transmitted to the nonlinear elements of the PCB circuit board 200, thereby suppressing the generation of the PIMD signals P 2f 2 -f 1 and P 2f 1 -f 2 .

3 is a view illustrating a base station antenna apparatus including an active element capable of removing a PIMD signal according to another embodiment of the present invention.

3, an antenna device capable of removing a PIMD signal includes a PCB circuit board 200 electrically connected to the signal generator 10 through a cable 100 and including a plurality of nonlinear devices 210 and a grounding unit, A plurality of filter means 600 formed on the PCB circuit board 200, a grounding portion 220 formed on the opposite side of the surface on which the nonlinear elements 210 of the PCB circuit board 200 are arranged, ) And the like.

3 differs from the embodiment of FIG. 2 in that the filter means 600 connected to each cable 100 does not have a shielding means for shielding the cable 100, And is connected to the ground 220.

Other configurations and functions thereof are the same as those in Fig.

As in the embodiment of FIG. 2, signals due to leakage power from an antenna radiation element or the like generate a PIMD signal by the nonlinear elements. Therefore, on the PCB circuit board 200 of FIG. 3, the PIMD signal The filter means 600 are formed.

The filter unit 600 formed on the PCB circuit board 200 is provided for each cable and connects the cable 100 and the grounding unit 220 through the connection line 710. [

Hereinafter, the principle of removing the PIMD signal in the antenna apparatus will be described.

Signals generated by the respective signal generators 10 such as motors and sensors are input to the PCB circuit board 200 through the cable 100. Leakage power leaked from the radiating elements of the antenna and the power distribution circuit, 100 to the non-linear element 210 of the PCB circuit board 200. The signals I1 +, f1 + f2, I1 , f1 + f2 ... I N , f1 + f2 input from the leakage power and input to the nonlinear device 210 are input to the PIMD signals P 2f 2 -f 1 , P 2f 1 -f2 ). In the present invention, signals (I1 +, f1 + f2, I1 , f1 + f2 ... I N , f1 + f2 ) leaking from the radiating element and the power distribution circuit, 600 and is discharged to the grounding unit 220 through the connecting line 710. Accordingly, it is prevented from being transmitted to the nonlinear device 210 of the PCB circuit board 200 and the occurrence of PIMD can be suppressed.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. .

Therefore, the embodiments described above are merely illustrative and are not intended to limit the scope of the present invention to the foregoing embodiments. It is to be understood that the flowcharts shown in the drawings are merely illustrative examples for achieving the most desirable results in the practice of the present invention, and that other steps may be added or some steps may be deleted.

The scope of the present invention will be defined by the appended claims, but all changes or modifications derived from the equivalents, as well as those directly derived from the claims, are also included in the scope of the present invention. .

Claims (12)

Ground plate;
One or more radiation elements supported on one side of the ground plate and supported by the ground plate;
A power distribution circuit that supplies power to the one or more radiation elements;
A PCB circuit board including at least one non-linear element;
A plurality of cables connected to the PCB circuit board;
Shielding means for shielding the plurality of cables from electromagnetic waves;
A plurality of filter means connected to said plurality of cables and said shielding means; And
Connecting means for connecting the shielding means and the ground plate;
/ RTI >
A base station antenna apparatus including an active element capable of PIMD signal cancellation,
Wherein the plurality of filter means comprises:
The shielding means being connected to the outside of the shielding means via a connecting line,
And transmitting all of the PIMD signals generated in the nonlinear device to the ground plate via the shielding means via the connecting means,
A base station antenna device including an active element capable of PIMD signal cancellation
The method according to claim 1,
Characterized in that the shielding means is a metal foil or a metal braid. A base station antenna device comprising an active element capable of PIMD signal cancellation
The method according to claim 1,
Characterized in that the plurality of copying means are multi-band copying means for copying signals of different frequency bands. A base station antenna device comprising an active element capable of removing a PIMD signal
The method according to claim 1,
Wherein the ground plate is a reflector for reflecting the power radiated from the radiation means in a specific direction, wherein the ground plate is capable of removing a PIMD signal.
The method according to claim 1,
Wherein the PCB circuit board further comprises a grounding unit, wherein the PIMD signal can be removed.
The method according to claim 1,
Wherein the plurality of filter means are disposed outside the PCB circuit board, wherein the PIMD signal can be removed.
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KR1020170051548A 2017-04-21 2017-04-21 Low PIMD base station antenna having active elements KR101929348B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020170051548A KR101929348B1 (en) 2017-04-21 2017-04-21 Low PIMD base station antenna having active elements
PCT/KR2018/002813 WO2018194265A1 (en) 2017-04-21 2018-03-09 Pimd signal removable base station antenna device including active element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020170051548A KR101929348B1 (en) 2017-04-21 2017-04-21 Low PIMD base station antenna having active elements

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KR20180118356A KR20180118356A (en) 2018-10-31
KR101929348B1 true KR101929348B1 (en) 2018-12-14

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WO (1) WO2018194265A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023527346A (en) * 2020-05-26 2023-06-28 ケーエムダブリュ・インコーポレーテッド antenna device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014085345A1 (en) * 2012-11-30 2014-06-05 P-Wave Holdings, Llc Built-in passive intermodulation detector for base station equipment
US20140225802A1 (en) * 2013-02-08 2014-08-14 Gerardo Huerta Adjustable-tilt housing with flattened dome shape, array antenna, and bracket mount
KR101644445B1 (en) * 2015-12-10 2016-08-01 주식회사 감마누 Base station antenna

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6362787B1 (en) * 1999-04-26 2002-03-26 Andrew Corporation Lightning protection for an active antenna using patch/microstrip elements
US9306278B2 (en) * 2011-11-14 2016-04-05 Intel Corporation Common multi-purpose actuator to control antenna remote electrical tilt, remote azimuth steering and remote azimuth beam-width control

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014085345A1 (en) * 2012-11-30 2014-06-05 P-Wave Holdings, Llc Built-in passive intermodulation detector for base station equipment
US20140225802A1 (en) * 2013-02-08 2014-08-14 Gerardo Huerta Adjustable-tilt housing with flattened dome shape, array antenna, and bracket mount
KR101644445B1 (en) * 2015-12-10 2016-08-01 주식회사 감마누 Base station antenna

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WO2018194265A1 (en) 2018-10-25

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