KR20210124657A - Rf power divider - Google Patents

Abstract

An RF power distributor according to one embodiment of the present application may comprise: an unequal distributor that receives power from a port 1 to which power is inputted with an input terminal to distribute power to a port A and a port B with different power ratios; a scattering-type distributor that distributes power so that power is inputted to a port C and has an even power ratio to a plurality of output terminals; a port C that receives power outputted from the port B of the unequal distributor and distributes the power to the plurality of output terminals of the scattering-type distributor; and a plurality of ports that transmit power of the same magnitude outputted from the port A of the unequal distributor and a plurality of output terminals of the scattering-type distributor to an antenna. Therefore, the present invention is capable of increasing spatial efficiency.

Description

RF POWER DIVIDER

It relates to a radio frequency (RF) power divider.

Recently, with the development of information and communication technology, fields using radio waves are expanding throughout society, such as 5G communication, wireless power transmission, and radar.

In order to transmit and receive radio waves in a desired direction, a reconstruction beam-forming technology through phased array control is utilized. The phased array beam-forming method is performed by disposing a plurality of element antennas and controlling a time (phase) difference between signals incident on each antenna.

This phased array beam-forming method has various beam patterns according to the arrangement of each element antenna, and the arrangement of each element antenna plays an important role in order to obtain a small grating lobe and high spatial efficiency.

In addition, according to the actual arrangement of each element antenna, it is important for each element antenna to supply a reference RF signal for the phased array beam-forming system to operate correctly. A reference RF signal is supplied using a power distribution scheme.

Regarding the arrangement of each element antenna to have a small side lobe and high spatial efficiency in a phased array beam-forming system, theoretically, the distance between each element antenna is a regular hexagon and a shape arranged at the center of a regular hexagon, that is, a hexagonal honeycomb shape When done, fewer side lobes and higher space efficiency can be obtained.

When a tree method or a direct distribution method for supplying a reference RF signal is used, it is sometimes difficult to actually implement a special structure such as a hexagonal honeycomb shape. Therefore, it is possible to have a back-to-back ground structure, so space efficiency is high, and an object of the present invention is to provide an RF power distributor capable of supplying a reference RF signal to an element antenna arranged in a hexagonal honeycomb shape.

However, the technical problems to be achieved by the embodiments of the present application are not limited to the technical problems described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, the RF power distributor according to an embodiment of the present application receives power from the port 1 to which power is inputted to the input terminal, and the power ratio is different between the port A and the port B. An unequal divider that distributes power, a scattering type divider that receives power from port C and distributes power to a plurality of output terminals to have an even power ratio, receives the power output from port B of the unequal divider and receives the scattering type divider Port C for distribution to a plurality of output terminals, port A of the unequal splitter, and a plurality of ports for transmitting power of the same size output from the plurality of output terminals of the scattering splitter to the antenna.

In addition, in the RF power distributor according to an embodiment of the present application, the unequal divider includes a first transmission line having one end connected to the input terminal, the other end connected to one end of the third transmission line, and one end connected to the input terminal, , the other end of the second transmission line connected to one end of the fourth transmission line, the third transmission line having one end connected to the first transmission line and the other end connected to the port A, and one end connected to the second transmission line and the other end includes an isolation resistor connected to a fourth transmission line connected to the port B, a connection point between the first transmission line and the third transmission line, and a connection point between the second transmission line and the fourth transmission line, , The plurality of ports may include a port 8 that transmits the power output from the port A to the antenna.

In addition, in the RF power distributor according to an embodiment of the present application, the first transmission line to the fourth transmission line may be formed of a microstrip.

In addition, in the RF power distributor according to an embodiment of the present application, the first transmission line may be a microstrip coupling line (Coupler Line).

In addition, in the RF power distributor according to an embodiment of the present application, the scattering type divider has a fifth transmission line having one end connected to the port C and the other end connected to the second output terminal, and one end connected to the port C, and , the other end is a sixth transmission line connected to the third output terminal, one end is connected to the port C, the other end is a seventh transmission line connected to the fourth output terminal, one end is connected to the port C, the other end is connected to the first an eighth transmission line connected to the fifth output terminal, one end connected to the port C, the other end connected to the sixth output terminal, and one end connected to the port C, and the other end connected to the seventh output terminal and a tenth transmission line connected to, and the plurality of ports may include ports 2 to 7 for transmitting power output from the second output terminal to the seventh output terminal to the antenna.

In addition, in the RF power divider according to an embodiment of the present application, the scattering type divider includes an 11th transmission line having one end connected to the second output terminal and the other end connected to the third output terminal, one end being the third a twelfth transmission line connected to an output terminal and having the other end connected to the fourth output terminal, a thirteenth transmission line having one end connected to the fourth output terminal and the other end connected to the fifth output terminal, one end being the a 14th transmission line connected to a fifth output terminal and the other end connected to the sixth output terminal, a fifteenth transmission line having one end connected to the sixth output terminal and the other end connected to the seventh output terminal, one end and a sixteenth transmission line connected to the seventh output terminal and the other end connected to the second output terminal.

In addition, in the RF power distributor according to an embodiment of the present application, the fifth transmission line to the sixteenth transmission line may be formed of a microstrip.

In addition, in the RF power distributor according to an embodiment of the present application, the eleventh transmission line to the sixteenth transmission line may include a ring resistor.

In addition, in the RF power distributor according to an embodiment of the present application, the ports 2 to 7 may be disposed in a regular hexagonal shape centered on the port 8.

In addition, it may be to use a Back-to-back Ground structure in the RF power divider according to an embodiment of the present application.

In addition, in the RF power divider according to an embodiment of the present application, the unequal divider may be a two-stage unequal Wilkinson power divider, and the scattering type divider may be a 6-way resistive power divider.

The above-described problem solving means are merely exemplary, and should not be construed as limiting the present application. In addition to the exemplary embodiments described above, additional embodiments may exist in the drawings and detailed description.

According to the above-described problem solving means of the present application, by providing an RF power divider, a reference RF signal is supplied to an antenna arranged in a hexagonal honeycomb structure that cannot be implemented with a conventional tree type power divider or a direct distribution type divider to have fewer side lobes. This can be done, and the space efficiency can be improved by implementing the circuit to have a back-to-back ground structure.

However, the effects obtainable herein are not limited to the above-described effects, and other effects may exist.

값에 따른 입력 임피던스를 나타낸 도면이다.
도6b는 본원의 일 실시예에 따른, 산란형 분배기의 링저항

값에 따른

노드와 출력단자

간의 절연을 나타내기 위한 도면이다.
도7은 본원의 일 실시예에 따른, 산란형 분배기의 제11전송선로 내지 제16전송선로의 특성 임피던스

와 전기적 거리

에 따른 입출력포트의 반사의 크기를 나타낸 그래프이다.
도8은 본원의 일 실시예에 따른, RF 전력 분배기의 각 소자의 값을 나타낸 표이다.
도9a는 본원의 일 실시예에 따른, RF 전력 분배기를 이용한 실제 회로 및 출력 포트 배치를 구현한 예시이다.
도9b는 본원의 일 실시예에 따른 RF 전력 분배기의 포트2 내지 포트8 및 산란형 분배기가 위치한 면을 나타낸 도면이다.
도9c는 본원의 일 실시예에 따른 RF 전력 분배기의 포트1 및 불균등 분배기이 위치한 다른 면을 나타낸 도면이다.
도10은 본원의 일 실시예에 따른 RF 전력 분배기의 주파수에 따른 Insertion loss, Phase delay, Reflection, Isolation을 나타낸 그래프이다.
도11은 본원의 일 실시예에 따른 RF 전력 분배기의 개략적인 블록도이다.1 is a diagram illustrating a wireless power transmission system using an RF power divider according to an embodiment of the present application.
2 is a diagram showing a circuit diagram of an RF power divider according to an embodiment of the present application.
Figure 3a is a view showing the configuration of the unequal distributor according to an embodiment of the present application using a microstrip line.
3B is a diagram showing a circuit diagram of an equivalent circuit of a microstrip coupling line and a microstrip coupling line of the first transmission line of the unequal splitter according to an embodiment of the present application.
4 is a diagram illustrating a circuit in which each transmission line of the scattering type divider is composed of a microstrip and a ring resistance is applied, according to an embodiment of the present application.
5 is a diagram illustrating a circuit for obtaining a value of a ring resistance of a scattering divider according to an embodiment of the present application.
6a is a ring resistance of a scattering divider according to an embodiment of the present application;

It is a diagram showing the input impedance according to the value.
Figure 6b is a ring resistance of a scattering divider according to an embodiment of the present application;

according to value

Nodes and Outputs

It is a diagram for showing the insulation between the livers.
7 is a characteristic impedance of the 11th transmission line to the 16th transmission line of the scattering type divider according to an embodiment of the present application;

and electrical distance

It is a graph showing the size of reflection of input/output port according to
8 is a table showing values of each element of the RF power divider according to an embodiment of the present application.
9A is an example of implementing an actual circuit and output port arrangement using an RF power divider according to an embodiment of the present application.
Figure 9b is a view showing a surface where the port 2 to port 8 and the scattering type distributor of the RF power distributor according to an embodiment of the present application.
Figure 9c is a view showing the other side of the RF power divider port 1 and the unequal divider is located according to an embodiment of the present application.
10 is a graph showing insertion loss, phase delay, reflection, and isolation according to the frequency of the RF power divider according to an embodiment of the present application.
11 is a schematic block diagram of an RF power distributor according to an embodiment of the present application.

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art to which the present application pertains can easily implement them. However, the present application may be embodied in several different forms and is not limited to the embodiments described herein. And in order to clearly explain the present application in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout this specification, when a part is said to be "connected" with another part, it includes not only the case where it is "directly connected" but also the case where it is "electrically connected" with another element interposed therebetween. do.

Throughout this specification, when it is said that a member is positioned "on", "on", "on", "under", "under", or "under" another member, this means that a member is positioned on the other member. It includes not only the case where they are in contact, but also the case where another member exists between two members.

Throughout this specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be construed in an ideal or overly formal meaning unless explicitly defined herein. do.

The suffixes “module,” “block,” and “part” for the components used in the following description are given or mixed in consideration of the ease of writing the specification only, and do not have a meaning or role distinct from each other by themselves. .

Hereinafter, it will be described in relation to the RF power divider according to an embodiment of the present application.

1 is a diagram illustrating a wireless power transmission system 1 using an RF power divider 100 according to an embodiment of the present application.

Referring to FIG. 1 , the time (phase) difference of the reference RF signal supplied from the RF power divider 100 is controlled through the active module layer 2, and the time (phase) difference between the signals is controlled by the array antenna layer 3 through the wireless power transmission channel. It is transmitted through (4), and the transmitted wireless power is received by the array antenna layer 5 of the receiving side. The side receiving the wireless power has the same configuration as the side transmitting the wireless power, and transmits power through the reverse process of the transmission side.

RF power divider 100 is unequal divider 200, scattering divider 300, port C 500 for transferring a portion of the output distributed from unequal divider 200 to scattering divider 300, distributed power The output may include a plurality of ports 400 . The RF power divider 100 supplies the output of the unequal divider 200 and the output of the scattering divider 300 as reference RF power, and the size of each output may be the same. The scattering divider 300 is connected in cascade to the unequal divider 200 . Here, the same output size may include a range having a difference within a preset error range.

는 격리저항(210)을 나타내고,

는 링저항(310),

는 기준 임피던스(101), 포트1(401)은 전력이 입력되는 포트이고, 포트2 내지 포트8(402~408)은 전력이 출력되는 포트로 복수개의 포트(400)에 포함되는 것이다.2 is a diagram showing a circuit diagram of the RF power divider 100 according to an embodiment of the present application. in Figure 2

represents the isolation resistor 210,

is the ring resistance 310,

is the reference impedance 101 , port 1 401 is a port to which power is input, and ports 2 to 8 ( 402 to 408 ) are ports to which power is output and are included in the plurality of ports 400 .

Referring to FIG. 2 , the RF power divider 100 receives power from the port 1 401 to which power is inputted to the input terminal 220 , and the power ratio is different between the port A 201 and the port B 202 . distribute power. In addition, the RF power distributor 100 receives power through the port C 500 for distributing the power output to the port B 202 to the plurality of output terminals 322 to 327, and a plurality of output terminals 322 ~327), power can be distributed to have an even power ratio. Power distributed through the port A 201 and the plurality of output terminals 322 to 327 may be transmitted to the plurality of ports 400 , and power of the same size may be transmitted to the antenna. That is, the input input to the RF power divider 100 is distributed to the port A 201 and the port B 202 , and the power output to the port B 202 is input to the port C 500 and again to a plurality of It is output to the output terminals 322 to 327. The outputs output to the port A 201 and the plurality of output terminals 322 to 327 are finally transmitted to the antenna through the plurality of ports 400 .

The RF power divider 100 according to an embodiment of the present application receives power from the port 1 401 to which power is inputted to the input terminal 220 , and transmits power to the port A 201 and the port B 202 . The power delivered from the unequal divider 200 is input to the unequal divider 200, which distributes power with different ratios, and the port C 500 distributes power so as to have an even power ratio to a plurality of output terminals 322 to 327. Port C 500 for receiving the power output from the port B 201 of the scattering divider 300, the unequal divider and distribute it to a plurality of output terminals 322 to 327 of the scattering divider 300, the unequal divider It may include a plurality of ports 400 for transmitting power of the same size output from the port A 201 of 200 and the plurality of output terminals 322 to 327 of the scattering splitter 300 to the antenna.

The unequal divider 200 of the RF power divider 100 receives power from the port 1 401 to which power is inputted to the input terminal 220, and the ratio of power to the port A 201 and the port B 202 is different. power can be distributed. Port C 500 receives power output from port B 202 and distributes power to a plurality of output terminals 322 to 327 connected to the scattering divider 300 to have a uniform power ratio. can convey In order to be used as a reference RF signal, the size of each output must be the same. The power ratio distributed from the port A 201 and the port B 202 is unequal, but then the power is input to the scattering distributor 300 through the port C 500 that receives the power output from the port B 202. , a power distribution process is performed to have an even power ratio to the plurality of output terminals 322 to 327 , so that power having the same magnitude as the power output by being connected to the port A 201 can be output. As a result, finally, power of the same size may be transmitted to the antenna through a plurality of (eg, seven) ports 400 .

For example, when the ratio of the power output to the port A 201 and the port B 202 is 1:n, the port B 202 having an output size n times larger than the output size of the port A 201 is The output is input to the port C 500 , and equal power equal to the power size of the port A 201 is outputted, so that a total of n+1 sizes of the same output can be obtained.

In the RF power divider 100 according to an embodiment of the present application, the unequal divider 200 may be an unequal Wilkinson power divider, and the scattering type divider 300 may be a 6-way scattering type power divider. For example, as the unequal divider 200 in which the power ratio of power output to the port A 201 and the port B 202 is different, various dividers such as a T-junction divider and an unequal Wilkinson divider may be applied. In addition, the scattering type divider 300 may be applied to various types of dividers, such as an n-way direct resistor divider, a 6-way scattering type divider using a junction resistor node, and a 6-way scattering type divider using a waveguide format.

3A is a view showing the configuration of the unequal distributor 200 using a microstrip line according to an embodiment of the present application.

의 크기에 따라 정해질 수 있다. 2 and 3A, the unequal divider 200 of the RF power divider 100 according to an embodiment of the present application has one end connected to the input terminal 220, and the other end is connected to one end of the third transmission line and A first transmission line connected, one end connected to the input terminal 220, the other end connected to one end of the fourth transmission line, a second transmission line connected to one end, one end connected to the first transmission line, and the other end connected to the port A 201 and a third transmission line to be connected, a fourth transmission line having one end connected to the second transmission line and the other end connected to the port B 202, a connection point 221 between the first transmission line and the third transmission line, and a second transmission line It may include an isolation resistor 210 connected to the connection point 222 of the furnace and the fourth transmission line. In addition, power output from port A 201 of the unequal divider 200 of the RF power divider 100 may be transmitted to the antenna through port 8 408 among the plurality of ports 400 . It has a first transmission line and a second transmission line bisected from the input terminal 220 , a third transmission line connected to the first transmission line, a fourth transmission line connected to the second transmission line, a first transmission line and a second transmission line The structure in which the isolation resistor 210 is connected to the connection point 221 of the 3 transmission line and the connection point 222 between the second transmission line and the fourth transmission line transfers power to the port A 201 and the port B 202. The ratio corresponds to a configuration for distributing power differently. The impedance of the first to fourth transmission lines and the size of the isolation resistor 210 have a power ratio of n:1 and a reference impedance 101 connected to the input/output port of power.

can be determined according to the size of

와 포트A(201)와 포트B(202)를 통해 출력되는 전력비에 따라 결정되는 제1전송선로 내지 제4전송선로의 특성 임피던스를 나타내는

내지

및 격리저항(210)

의 값을 나타낸 것이다. 포트A(201)와 포트B(202)로 출력하고자 하는 전력의 크기비를 결정하고, 입출력포트에 연결되는 기준 임피던스

를 결정하면, 제1전송선로 내지 제4전송선로의 임피던스 값을 구할 수 있고, 격리저항(210)의 크기도 구할 수 있게 되어, 제1전송선로 내지 제4전송선로의 특성 임피던스 값을 정할 수 있다. 예를 들어, 기준 임피던스(101)

를 50Ω, 전력비 n:1을 6:1로 결정한 경우(

)에, 아래 [식1]에 따라 제1전송선로의 임피던스

은 약 208Ω, 제2전송선로의 임피던스

는 약 35Ω, 제3전송선로의 임피던스

는 약 78Ω, 제4전송선로의 임피던스

는 약32Ω, 격리저항(210)의 저항

는 약 143Ω이 된다. 또한, 각 전송선로의 전기적 길이를 동일하게 π/2로 하여 격리저항(210)과 함께 출력단자 간의 절연(Isolation)을 향상시킬 수 있다.[Equation 1] below is the reference impedance (101)

and the characteristic impedance of the first to fourth transmission lines determined according to the ratio of power output through the port A (201) and the port B (202).

inside

and isolation resistance (210)

represents the value of The ratio of the power to be output to the port A 201 and the port B 202 is determined, and the reference impedance connected to the input/output port

is determined, the impedance values of the first to fourth transmission lines can be obtained, and the size of the isolation resistor 210 can also be obtained, so that the characteristic impedance values of the first to fourth transmission lines can be determined. have. For example, reference impedance 101

is 50Ω and the power ratio n:1 is 6:1 (

), the impedance of the first transmission line according to [Equation 1] below

is about 208Ω, the impedance of the second transmission line

is about 35Ω, the impedance of the third transmission line

is about 78Ω, the impedance of the 4th transmission line

is about 32Ω, the resistance of the isolation resistor 210

is about 143Ω. In addition, by making the electrical length of each transmission line equal to π/2, the isolation between the output terminals together with the isolation resistor 210 can be improved.

[Formula 1]

는 포트 A(201)와 출력 포트 B(202)에서 출력되는 전력비의 제곱근 (

)이고,

는 입출력포트에 연결되는 기준 임피던스(101)의 크기를 나타낸다.here,

is the square root of the power ratio output from port A (201) and output port B (202) (

)ego,

denotes the size of the reference impedance 101 connected to the input/output port.

Therefore, as shown in [Equation 1] above, the sizes of the first to fourth transmission lines and the isolation resistor 210 are determined and the electrical lengths are the same, and output to the port A 201 and the port B 202. Power can be distributed with different ratios of power.

내지

의 값을 갖도록 설계할 수 있다.Referring to FIG. 3A , the first to fourth transmission lines included in the unequal divider 200 of the RF power divider 100 according to an embodiment of the present disclosure may be microstrips. The microstrip refers to a line having a structure in which a dielectric is placed between two metal plates (microstrip, ground conductor) as one of the planar transmission lines, and electromagnetic waves mainly propagate through the dielectric. The characteristic impedance value of the microstrip line varies depending on the width and length of the microstrip line, the relative permittivity of the dielectric, and the height of the dielectric.

inside

It can be designed to have a value of

내지

의 임피던스 값을 가져야 한다. 마이크로스트립 선로 ITTL(Impedance Transforming Transmission Line)이 가지는 특성 임피던스가 각각 [식1]을 통해 구한

내지

의 값을 가지도록 하고, 마이크로스트립으로 된 제1전송선로 내지 제4전송선로가 가지는 전기적 길이를 동일하게 하여, 포트A(201)와 포트B(202)에서 출력되는 전력의 크기가 다르게 전력을 분배할 수 있다. In order to determine the magnitude ratio of the power output from the port A 201 and the port B 202, the first to fourth transmission lines are determined by the above [Equation 1].

inside

It should have an impedance value of The characteristic impedance of the microstrip line ITTL (Impedance Transforming Transmission Line) is obtained through [Equation 1], respectively.

inside

to have a value of , and by making the electrical lengths of the first to fourth microstrip transmission lines the same, the power output from the port A 201 and the port B 202 is different in magnitude. can be distributed

3B is a diagram showing a circuit diagram of an equivalent circuit of a microstrip coupling line and a microstrip coupling line of the first transmission line of the unequal splitter 200 according to an embodiment of the present application. The microstrip coupling line uses the coupling phenomenon between adjacent microstrip lines to change the capacitance between two lines by adjusting the spacing and length of the adjacent lines.

의 크기가 큰 경우,

의 특성 임피던스를 갖는 마이크로스트립 선로를 구현하는 것이 어려울 수 있고, 수학적으로 계산하여 높은 임피던스 값을 갖도록 구현한 마이크로스트립 선로의 전기적 동작 특성이 계산과 일치하지 않을 수 있다. Referring to FIG. 3b (a), the first transmission line of the unequal distributor 200 according to an embodiment of the present application may be a microstrip coupling line. Figure 3b (a) is a diagram showing the first transmission line of the unequal distributor 200 as a microstrip coupling line circuit diagram. The first transmission line may require a high impedance value according to the magnitude of the power ratio output through the port A 201 and the port B 202 and the reference impedance 101 . At this time, the impedance of the first transmission line

If the size of is large,

It may be difficult to implement a microstrip line having a characteristic impedance of

A structure such as a Defected Ground Structure (DGS) has been proposed to implement a microstrip line having such a high impedance, but the structure is complicated, an additional processing process in the ground layer is required, and a sufficient space with other conductors is required. There are disadvantages such as However, like the RF power divider 100 according to an embodiment of the present application, when a transmission line is implemented as a microstrip coupling line, a high characteristic impedance can be realized as well as a ring resistance to the scattering type divider 300 to be described later. Space usability can also be improved by applying the 310 added divider and back-to-back ground structure.

및 전기적 거리

를 갖고, 포트1(401)로부터 전력을 전달받는 입력단자(220)와 제1전송선로와 제3전송선로의 접속점(221) 사이에 연결된다. 본원의 일 실시예에 따를 때, 도3a의 불균등 분배기(200)의 제1전송선로는 마이크로스트립 결합선로를 사용하여 도3b의 (ㄱ)로 대체될 수 있다. 대체된 마이크로스트립 결합선로는 입력단자(220)와 Ground사이에 연결되는 마이크로스트립 선로 및 Ground와 제1전송선로와 제3전송선로의 접속점(221) 사이에 연결되는 마이크로스트립 선로로 구성된다. 각 마이크로스트립 선로의 특성 임피던스는

,

이고 이는 각각 odd mode 임피던스와 even mode 임피던스를 뜻하며, 각 선로의 전기적 길이는

이다. 또한, 대각상에 위치한 두 포트가 단락(short) 되어 있다. 3A and 3B (a), the first transmission line of the unequal divider 200 according to an embodiment of the present application has a characteristic impedance

and electrical distance

and is connected between the input terminal 220 receiving power from the port 1 401 and the connection point 221 of the first transmission line and the third transmission line. According to an embodiment of the present application, the first transmission line of the unequal distributor 200 of FIG. 3A may be replaced by (a) of FIG. 3B using a microstrip coupling line. The replaced microstrip coupling line consists of a microstrip line connected between the input terminal 220 and the Ground, and a microstrip line connected between the ground and the connection point 221 of the first transmission line and the third transmission line. The characteristic impedance of each microstrip line is

,

and this means odd mode impedance and even mode impedance, respectively, and the electrical length of each line is

am. In addition, two ports located on a diagonal are shorted.

Figure 3b (b) is a diagram showing an equivalent circuit of the microstrip coupling line. The microstrip coupling circuit of FIG. 3b(b) is the same as the microstrip line with two stubs of FIG. 3b(b), and at this time, the admittance parameter [Y] of the two-port network is the following [Equation 2] and same.

[Formula 2]

여기서,

는

의 역수이고,

는

의 역수이다.

here,

Is

is the reciprocal of

Is

is the inverse of

인 두 스터브와 동일하고, 두 번째 항은 특성 임피던스

이고 전송선로의 전기적 길이가

의 어드미턴스 파라미터와 동일하다.

는even mode 임피던스와 odd mode 임피던스의 커플링 계수 C(Coupling coefficient)를 사용하여 나타내면 아래의 [식3]과 같다.In [Equation 2], the first term is the characteristic impedance

Same as phosphorus two stubs, the second term is the characteristic impedance

and the electrical length of the transmission line is

equal to the admittance parameter of

is expressed using the coupling coefficient C (Coupling coefficient) of the even mode impedance and the odd mode impedance as shown in [Equation 3] below.

[Formula 3]

를 연결하고 계산한 입력 임피던스

은 아래 [식4]와 같다.3b (b) in one port

connected and calculated input impedance

is as [Equation 4] below.

[Formula 4]

는

의 역수이고,

는

의 역수이다.here,

Is

is the reciprocal of

Is

is the inverse of

일 때,

가 된다. 여기서, 입력 임피던스

은 특성 임피던스가

이고, 3π/2의 전기적 길이를 가지는 전송선로와 같다. 이는 특성 임피던스

을 마이크로스트립 결합선로의

와

를 조정함으로써

로 교체하는 것이 가능하다는 결과가 된다. 다만, 특성 임피던스

를 가지는 마이크로스트립 결합선로로 대체된 제1전송선로는 도3b(ㄴ)과 같이 3π/2의 전기적 길이를 가지기 때문에, phase delay 매칭을 위하여 제2전송선로의 전송선로의 길이도 이와 동일하게 하여야 한다. In the above [Equation 4]

when,

becomes Here, the input impedance

is the characteristic impedance

and is the same as a transmission line having an electrical length of 3π/2. This is the characteristic impedance

of the microstrip coupling line.

Wow

by adjusting

The result is that it is possible to replace it with However, characteristic impedance

Since the first transmission line replaced by the microstrip coupling line having do.

을 가지는 제1전송선로를 대체하는 마이크로스트립 결합선로의

와

의 값을 선택하여, 특성 임피던스

를 결정할 수 있고, 마이크로스트립 결합선로의 특성 임피던스

가

의 값을 갖도록 하는 마이크로스트립 결합선로로 된 전송선로로 구현할 수 있다. 대체된 마이크로스트립 결합선로의 전기적 길이는 3π/2가 되므로 제2전송선로의 전기적 길이도 이에 대응하도록 조정할 수 있다.That is, the resulting characteristic impedance

of the microstrip coupling line replacing the first transmission line having

Wow

By choosing the value of the characteristic impedance

can be determined, and the characteristic impedance of the microstrip coupling line

go

It can be implemented as a transmission line with a microstrip coupling line that has a value of . Since the electrical length of the replaced microstrip coupling line becomes 3π/2, the electrical length of the second transmission line can also be adjusted to correspond thereto.

이 되고,

가 되고, 이때

가

와

가

이면

는

과 근사한 값이 된다. 이와 같이, 기준 임피던스(101)

와 분배 전력비

의 값에 따라 마이크로스트립 결합선로의

와

를 조절하여

의 값을 갖는

로 대체할 수 있다.For example, when the power ratio of port A 201 and port B 202 is 1:6, in [Equation 1]

become this,

becomes, at this time

go

Wow

go

back side

Is

is a value close to As such, the reference impedance 101

and distribution power ratio

According to the value of the microstrip coupling line

Wow

by adjusting

having a value of

can be replaced with

4 is a diagram illustrating a circuit in which each transmission line of the scattering type distributor 300 is configured as a microstrip and a ring resistor 310 is applied, according to an embodiment of the present application.

4, the scattering type divider 300 of the RF power divider 100 according to an embodiment of the present application has one end connected to the port C 500, and the other end connected to the second output terminal 322. A fifth transmission line, one end is connected to the port C (500), the other end is connected to the third output terminal (323), a sixth transmission line, one end is connected to the port C (500), the other end is connected to the fourth output terminal A seventh transmission line connected to 324, one end connected to the port C 500, the other end connected to the fifth output terminal 325, an eighth transmission line, one end connected to the port C 500, The other end may include a ninth transmission line connected to the sixth output terminal 326, one end connected to the port C 500, and the other end may include a tenth transmission line connected to the seventh output terminal 327, The plurality of ports 400 may transmit power output from the second to seventh output terminals 322 to 327 to the antenna through the ports 2 to 7 (402 to 407). The power input to the port C 500 is distributed through the second output terminals to the seventh output terminals 322 to 327 through the fifth transmission line to the tenth transmission line, and the magnitude of the output power is the same. The same amount of power output to the second to seventh output terminals 322 to 327 is transmitted to the antenna through ports 2 to 7 (402 to 407).

로 동일하고, 각 전송선로의 길이는 λ/4로 동일한 길이를 갖게 하여, 제2출력단자 내지 제7출력단자(322~327)를 통해 출력되는 크기가 동일하게 전력을 분배할 수 있다For example, the characteristic impedance of the fifth transmission line to the tenth transmission line

is the same, and the length of each transmission line is made to have the same length as λ/4, so that power can be equally distributed in the size output through the second output terminal to the seventh output terminal 322 to 327.

4, the scattering type divider 300 of the RF power divider 100 according to an embodiment of the present application has one end connected to the second output terminal 322, and the other end to the third output terminal 323. 11th transmission line connected, one end connected to the third output terminal 323, the other end connected to the fourth output terminal 324, a twelfth transmission line connected to the fourth output terminal 324, one end connected to the fourth output terminal 324, A thirteenth transmission line having the other end connected to the fifth output terminal 325, one end connected to the fifth output terminal 325, and the other end connected to the sixth output terminal 326, a fourteenth transmission line, one end connected to the sixth output terminal 326 A fifteenth transmission line connected to the sixth output terminal 326 and the other end connected to the seventh output terminal 327 , one end connected to the seventh output terminal 327 , and the other end connected to the second output terminal 322 . The connected sixteenth transmission line may be included, the fifth to sixteenth transmission lines may be microstrips, and the eleventh to sixteenth transmission lines may include a ring resistor 310 . The fifth transmission line to the sixteenth transmission line may be configured as microstrip lines and a ring resistor 310 may be added to have a back-to-back ground structure. In addition, by adjusting the size of the ring resistor 310 to match the output impedance of the second output terminal to the seventh output terminals 322 to 327 of the RF power divider 100, it is possible to improve the insulation between the output terminals.

, 전기적 거리

인 마이크로스트립 전송선로이고, 제11전송선로 내지 제16전송선로는 특성 임피던스

, 전기적 거리

이고, 링저항(310)

를 포함하는 마이크로스트립 전송선로이다. 제2출력단자 내지 제7출력단자(322~327)는 각각 포트2 내지 포트7(402~407)과 연결되어 출력된 동일한 크기의 전력을 전달하고, 포트2 내지 포트7(402~407)은 각각 전달된 전력을 안테나로 전달한다. 기존의 출력 임피던스 매칭 및 출력단자간의 절연을 향상하기 위한 산란형 분배기의 형태인 junction resistor node를 활용한 산란형 분배기 또는 waveguide format을 활용한 산란형 분배기는 출력 포트 임피던스와 출력포트 간의 절연을 향상시키는데 도움이 되나, 평면 마이크로스트립 선로를 활용하여 이를 구현하기 어려운 측면이 있다. 따라서, 마이크로스트립 선로로 된 제11전송선로 내지 제16전송선로를 추가하고, 링저항(310)을 배치함으로써 평면 마이크로스트립 선로를 적용하고 출력 임피던스 매칭 및 출력포트 간의 절연를 향상시킬 수 있다. 출력 임피던스 매칭 및 출력단자간의 절연 향상을 위해서 링저항(310)의 값이 중요하고, 이하에서는 이를 구하는 과정에 대해서 상술한다.Referring to FIG. 4 , the fifth to tenth transmission lines of the scattering splitter 300 have characteristic impedances.

, electrical distance

In a microstrip transmission line, the 11th transmission line to the 16th transmission line are characteristic impedances

, electrical distance

, and the ring resistance (310)

It is a microstrip transmission line comprising a. The second output terminal to the seventh output terminal 322 to 327 are respectively connected to the ports 2 to 7 (402 to 407) to transmit the output power of the same size, and the ports 2 to the port 7 (402 to 407) are Each transmits the transmitted power to the antenna. A scattering type divider using a junction resistor node, which is a form of a scattering divider to improve the existing output impedance matching and insulation between output terminals, or a scattering type divider using a waveguide format improves the insulation between output port impedance and output port. It is helpful, but it is difficult to implement it using a flat microstrip line. Accordingly, it is possible to apply a planar microstrip line and improve output impedance matching and insulation between output ports by adding the eleventh to sixteenth transmission lines made of microstrip lines and disposing the ring resistor 310 . The value of the ring resistor 310 is important for output impedance matching and insulation improvement between output terminals, and a process for obtaining it is described in detail below.

및 길이는 링저항(310)

를 임피던스 왜곡 없이 적용하기 위해 중요하나, 우선 적절한 링저항(310)

의 값을 얻기 위해 제11전송선로 내지 제16전송선로의 특성 임피던스

를 0으로 하여 링저항(310)

의 값을 구하고, 이후 출력단자간의 반사에 의한 왜곡이 작은 값을 구할 수 있다.5 is a diagram illustrating a circuit for calculating the value of the ring resistance 310 of the scattering type divider 300 according to an embodiment of the present application. Characteristic impedance of the 11th transmission line to the 16th transmission line

and the length is the ring resistance (310)

is important to apply without impedance distortion, but first, an appropriate ring resistance 310

Characteristic impedance of the 11th transmission line to the 16th transmission line to obtain a value of

to 0 and the ring resistance (310)

After obtaining the value of , a value with a small distortion due to reflection between output terminals can be obtained.

를 연결하여 ground와 연결하고, 제2출력단자(322)는 기준 임피던스(101)

및 임의의 전압원

(321)를 연결하고 ground와 연결한다.

내지

은 제2출력단자 내지 제7출력단자(322~327)의 전압이고,

는 포트C(500)의 전압이다. 이때, 포트C(500)와 제2출력단자 내지 제7출력단자(322~327)와 각각 연결되는 제5전송선로 내지 제10전송선로는 각각 특성 임피던스

는

이고, 길이는 λ/4일 때, 아래 [식5]와 같은

과

사이의 관계식을 얻게 된다.Referring to FIG. 5 , the reference impedance 101 is applied to the third to seventh output terminals 323 to 327 and the port C 500 .

to connect to ground, and the second output terminal 322 is the reference impedance 101

and any voltage source

(321) and connect to ground.

inside

is the voltage of the second output terminal to the seventh output terminal (322 to 327),

is the voltage of port C (500). At this time, the fifth to tenth transmission lines respectively connected to the port C 500 and the second to seventh output terminals 322 to 327 have characteristic impedances, respectively.

Is

, and when the length is λ/4, as in [Equation 5] below,

class

get the relation between

[Formula 5]

와

는 특성 임피던스가

인 ITTL에서의 전압파(wave voltage)이고, k는 손실이 없는 조건의 wave number를 뜻하고, 2π/λ가 된다.here,

Wow

is the characteristic impedance

is the wave voltage in ITTL where k is the wave number under the condition of no loss, and becomes 2π/λ.

In addition, an additional simultaneous equation [Equation 6] can be obtained as follows.

[Formula 6]

는

노드에서

노드로 흐르는 전류를 뜻한다.here,

Is

in node

It means the current flowing through the node.

과

를 구할 수 있고, [식5], [식6]에 따라

를 구할 수 있다.Referring to FIG. 5, a Kirchhoff Current Law (KCL) matrix as shown in [Equation 7] below can be obtained. According to [Equation 7]

class

can be obtained, and according to [Equation 5] and [Equation 6]

can be obtained

[Formula 7]

노드의 입력 임피던스 및

노드와 출력단자

간의 절연을 나타내기 위한 도면으로, [식5] 내지 [식7]을 통해 얻은

과

,

를 이용한다. 6a and 6b are

the input impedance of the node and

Nodes and Outputs

As a drawing to show the insulation of the liver, it is obtained through [Equation 5] to [Equation 7].

class

,

use the

값에 따른 입력 임피던스를 나타낸 그래프이다. 도6a에서, 그래프 상에서 푸른 O으로 표시된

는

노드의 전압의 크기, 붉은 X로 표시된

는 접지점에서

노드로 흐르는 전류의 크기를 나타낸다.

노드(322)에서의 입력 임피던스는 전압

와

(321)로부터 생성된 전류인

의 비가 되고, 링저항(310)

의 값에 따른

,

의 값을 통해,

노드(322)에서의 입력 임피던스 를 구할 수 있다.Figure 6a is, according to an embodiment of the present application, a ring resistance 310 of the scattering type divider 300

It is a graph showing the input impedance according to the value. In Fig. 6a, indicated by blue O on the graph

Is

The magnitude of the voltage at the node, marked with a red X

is at the ground point

It represents the magnitude of the current flowing through the node.

The input impedance at node 322 is the voltage

Wow

The current generated from (321) is

becomes the ratio of the ring resistance (310)

according to the value of

,

through the value of

The input impedance at the node 322 can be obtained.

의 값에 따른

,

의 값을 확인할 수 있다. 도6a에서

노드(322)에서의 입력 임피던스는

가 약

일 때

와 근사한 값이 됨을 확인할 수 있다. 이것은

노드(322)에서의 출력 임피던스가

가 약

일 때

와 근사한 값이 되어, 출력 임피던스 매칭이 됨을 의미한다.Referring to Figure 6a, the ring resistor 310

according to the value of

,

value can be checked. in Figure 6a

The input impedance at node 322 is

about

when

It can be seen that the value is close to this is

The output impedance at node 322 is

about

when

It becomes a value close to , meaning output impedance matching.

값에 따른

노드(322)와 출력단자

(323~327)간의 절연을 나타내기 위한 그래프이다. 도6b에서,

는 검은 실선으로 표시되어 있고, 나머지는

및

를 나타낸다. 각 포트간의 절연은

(322)와

를 제외한 나머지 노드의 전압의 크기에 따라 결정된다.Figure 6b is, according to an embodiment of the present application, the ring resistance 310 of the scattering type divider 300

according to value

Node 322 and an output terminal

It is a graph to show the insulation between (323~327). 6b,

is indicated by a solid black line, and the rest are

and

indicates Insulation between each port is

(322) and

It is determined according to the magnitude of the voltage of the remaining nodes except for .

에 따른 각 노드에서의 전압

을 확인할 수 있다. 도6b에서는

와

을 제외한 나머지 노드의 전압은

와 무관하게 0이 됨을 알 수 있다. 따라서,

와 무관하게 출력포트간의 절연됨을 알 수 있다.Referring to Figure 6b, the ring resistor 310

voltage at each node according to

can confirm. In Figure 6b

Wow

The voltages at the nodes except for

It can be seen that irrespective of thus,

It can be seen that the insulation between the output ports is independent of .

노드(322)에서의 입력 임피던스는

가 약 2.08

일 때

와 근사한 값이 되고, 도6b에서는

와

을 제외한 나머지 노드의 전압은

와 무관하게 0이 됨을 확인할 수 있다. 따라서,

의 값이

인 경우, 입력 임피던스는 기준 임피던스(101)

와 같은 값을 가지고, 출력단자간의 절연도 우수함을 알 수 있고, 링저항(310)

의 값을

로 정할 수 있다.Taken together, in Fig. 6a

The input impedance at node 322 is

about 2.08

when

is an approximate value, and in Fig. 6b

Wow

The voltages at the nodes except for

It can be confirmed that it becomes 0 regardless of . thus,

the value of

If , the input impedance is the reference impedance 101

It can be seen that has the same value as , and the insulation between the output terminals is excellent, and the ring resistance 310

the value of

can be set as

와 전기적 거리

에 따른 입출력포트의 반사의 크기를 나타낸 그래프이다. 도7에서는 특성 임피던스

의 크기가 각각

,

,

,

일때의 포트C의 반사값

와 포트n(n=2,3,...,7)의 반사값

을 나타낸다. 앞서 링저항(310)의 크기를 정하는 과정에서는 제11전송선로 내지 제16전송선로의 특성 임피던스

를 0으로 가정하였으나, 파장이 몇 센티미터에 불과하기 때문에, 제11전송선로 내지 제16전송선로의 특성 임피던스

와 전기적 거리

에 따라 입출력 임피던스의 왜곡을 야기할 수 있다. 특성 임피던스

와 전기적 거리

에 따른 입출력포트의 반사의 크기를 통해 분배기가 올바르게 동작할 수 있는 조건을 확인하여야 한다.7 is a characteristic impedance of the eleventh transmission line to the sixteenth transmission line of the scattering type divider 300 according to an embodiment of the present application.

and electrical distance

It is a graph showing the size of reflection of input/output port according to 7, the characteristic impedance

the size of each

,

,

,

Reflection value of port C at one time

and the reflection value of port n (n=2,3,...,7)

indicates In the process of determining the size of the ring resistor 310 previously, the characteristic impedance of the 11th transmission line to the 16th transmission line

is assumed to be 0, but since the wavelength is only a few centimeters, the characteristic impedance of the 11th transmission line to the 16th transmission line

and electrical distance

This may cause distortion of input/output impedance. characteristic impedance

and electrical distance

Through the size of the reflection of the input/output port according to

와 전기적 거리

에 따른 입력 포트인 포트C(500)에서의 반사(

)와 출력 포트인 포트2 내지 포트7(402~407)의 반사(

)의 크기를 나타낸 것이다. 도7에서, 전기적 거리

가 π/2일 때, 입출력 포트에서의 반사의 크기(

,

)가 최대로 가장 나쁘고, 0 또는 π일 때 입출력 포트에서의 반사의 크기(

,

)가 최소로 가장 좋음을 알 수 있다.

는 0°로 구현하기가 어렵기 때문에, 그 값이 π가 됨이 바람직하다. 그리고, 특성 임피던스

가

일 때 입출력 포트에서의 반사의 크기(

,

)가 전체적으로 낮음을 알 수 있다. 따라서, 제11전송선로 내지 제16전송선로의 특성 임피던스

와 전기적 거리

의 값은 각각

와 π가 될 수 있다.Referring to FIG. 7, characteristic impedances of the 11th transmission line to the 16th transmission line

and electrical distance

Reflection at port C (500), which is the input port according to (

) and the reflection of ports 2 to 7 (402 to 407) that are output ports (

) is the size of the 7, the electrical distance

When is π/2, the magnitude of the reflection at the input/output port (

,

) is at its worst worst, 0 or π, the magnitude of the reflection at the input/output port (

,

) is the least and best.

Since it is difficult to implement as 0°, it is preferable that the value be π. And, the characteristic impedance

go

The magnitude of reflection at the input/output port (

,

) is generally low. Accordingly, the characteristic impedance of the 11th transmission line to the 16th transmission line

and electrical distance

each value of

and π can be

In summary, the RF power divider 100 according to an embodiment of the present application may configure the first to fourth transmission lines of the unequal divider 200 as microstrip lines, and By replacing the first transmission line with a microstrip coupling line in order to realize a high characteristic impedance value of the first transmission line, the power ratio of the power output to the port A 201 and the port B 202 can be different. . In addition, between the fifth transmission line to the tenth transmission line and the output terminal respectively connected to the port C 500 and the second output terminal to the seventh output terminals 322 to 327 to which the power of the scattering type distributor 300 is input. to form a ring structure, and the eleventh to sixteenth transmission lines including the ring resistor 310 may be configured as microstrip lines, and may improve output impedance matching and insulation between output ports.

내지

및 격리저항(310)

의 크기와 마이크로스트립 결합선로의

,

는 [식1] 및 [식3]을 통해 얻을 수 있고, 제2전송선로의 전기적 길이

는 제1전송선로 보다 π 더 긴 3π/2가 되며, 제1전송선로, 제3전송선로 및 제4전송선로의 전기적 길이는 π/2가 된다. 제5전송선로 내지 제10전송선로는

및 전기적 길이

는 π/2이고, [식5] 내지 [식7]과 도6 및 도7에 따라 제11전송선로 내지 제16전송선로의 특성 임피던스

는

및 전기적 길이

는 π가 되고, 링저항(310)

는

가 된다.8 is a table showing values of each element of the RF power divider 100 according to an embodiment of the present application. 8 shows the characteristic impedance and electrical characteristics of each transmission line of the scattering type divider 300 to which the output ratio of the port A 201 and the port B 202 of the unequal divider 200 is 1:6, and a 6-way ring resistance is applied. The distance, the isolation resistor 210 and the size of the ring resistor 310 are shown. Impedance of the first transmission line to the fourth transmission line

inside

and isolation resistance (310)

of the size and microstrip coupling line

,

can be obtained through [Equation 1] and [Equation 3], and the electrical length of the second transmission line

becomes 3π/2, which is π longer than that of the first transmission line, and the electrical lengths of the first transmission line, the third transmission line, and the fourth transmission line become π/2. The fifth transmission line to the tenth transmission line are

and electrical length

is π/2, and the characteristic impedance of the 11th transmission line to the 16th transmission line according to [Equation 5] to [Equation 7] and FIGS. 6 and 7

Is

and electrical length

becomes π, and the ring resistance 310

Is

becomes

The RF power divider 100 according to an embodiment of the present application may determine the distribution ratio of the unequal divider 200 in consideration of an insertion loss of the scattering type divider 300 . The power output through port 8 (408) is transmitted from port A (201) which is the output of the unequal divider 200, whereas ports 2 to 7 (402 to 407) are the output of the unequal divider 200. Power input from the port B 202 to the scattering type distributor 300 is transmitted through the second output terminal to the seventh output terminal 322 to 327. That is, the power output to the ports 2 to 7 (402 to 407) has an additional power distribution step compared to the power output to the port 8 (408), resulting in additional insertion loss. In order to offset this, the distribution ratio of the unequal divider 200 may be determined in consideration of the insertion loss in such a way that the size of the power output to the port B 202 is increased in consideration of the insertion loss.

,

,

내지

의 값도 변경된 전력 분배비에 따라 달라질 수 있다. 불균등 분배기(200)의 전력 분배비가 6.8:1이고, 기준 임피던스(101)의 크기가 50Ω일 때, 해당 전력 분배비에 따른

,

는 각각 62.33Ω, 40.11Ω이 되고,

내지

는 각각 33.16Ω, 80.74Ω, 30.96Ω이 된다.For example, when ports 2 to 7 (402 to 407) have an additional insertion loss of 0.8 dB compared to port 8 (408) at a specific frequency, the distribution ratio of the unequal divider 200 may be determined to be 6.8:1 . At this time, in FIG.

,

,

inside

The value of may also vary according to the changed power distribution ratio. When the power distribution ratio of the unequal divider 200 is 6.8:1 and the size of the reference impedance 101 is 50Ω,

,

becomes 62.33Ω and 40.11Ω, respectively,

inside

becomes 33.16Ω, 80.74Ω, and 30.96Ω, respectively.

9A is an example of implementing an actual circuit and output port arrangement using the RF power divider 100 according to an embodiment of the present application.

Referring to FIG. 9, the RF power distributor 100 according to an embodiment of the present application may have a Back-to-back Ground structure, and ports 2 to 7 ( 402 to 407) may be arranged.

Referring to FIG. 9A , the RF power distributor 100 may have ports 2 to 7 (402 to 407) arranged in a hexagonal shape centered on the port 8 (408). The port A 201 output from the unequal distributor 200 is connected to the port 8 408 and disposed at the center of the regular hexagon. The output of the port B 202 output from the unequal distributor 200 is transmitted to the scattering type distributor 300 through the port C 500 that receives the output. Ports 2 to 7 (402 to 407) connected to the second to seventh output terminals 322 to 327 and transmitting the output power may be disposed at vertices of the regular hexagon. The magnitude of power transmitted from ports 2 to 8 (402 to 408) is the same. As described above, in order to equalize the size of the power delivered to the ports 2 to 7 (402 to 407) and the power output to the port 8 (408), the power distribution process of the scattering type divider 300 occurs. The power distribution ratio of the port A 201 and the port B 202 of the unequal divider 200 may be determined in consideration of the insertion loss.

As described above, by arranging the plurality of ports 400 to which the power of the RF power distributor 100 is transmitted and at the vertices and the center of the regular hexagon, power can be transmitted to the antenna arranged in the same shape as the plurality of ports 400 . Since the phased array beamforming method has various beam patterns depending on the arrangement of each element antenna, the arrangement or arrangement of each element antenna is important. It is important to supply it properly. In the case of a hexagonal honeycomb shape in which the distance between each element antenna of the phased array beamforming system is constant, that is, when the antenna is disposed at the vertex of a regular hexagon and the center of the regular hexagon, it has fewer side lobes and high space efficiency. However, it may be difficult to supply a reference RF signal with the existing RF power divider when the antenna is arranged at the vertex of a regular hexagon and the center of the regular hexagon.

In addition, the RF power divider 100 according to an embodiment of the present application may use a back-to-back ground structure. As described above, it is difficult to implement the unequal divider 200 as a back-to-back ground structure when using DGS or the like, or when the scattering divider 300 is used to increase the insulation between output terminals by a junction resistor node or the like. . The RF power divider 100 is implemented by replacing the high characteristic impedance value of the first transmission line included in the unequal divider 100 with a microstrip coupling line, and receives the output of the unequal divider 200 as an input and distributes power. By including the 11th transmission line to the 16th transmission line including the ring resistor 310 in the type distributor 300, it solves the difficulty of implementing the existing first transmission line to have a high characteristic impedance, and the scattering type It is possible to save the circuit space by solving the problem of insulation and output impedance matching between the output terminals of the divider 300 and having a back-to-back ground structure at the same time.

Figure 9b is a view showing a surface on which ports 2 to 8 (402 to 408) and the scattering type distributor 300 of the RF power distributor 100 according to an embodiment of the present application are located, Figure 9c is an embodiment of the present application Port 1 401 of the RF power divider 100 and the unequal divider 200 is a view showing the other side is located.

In Figure 9a, there are ports 2 to 8 (402 to 408) and the 5th to 16th transmission lines and ring resistors 310 corresponding to the scattering type divider 300 on one side, and power is supplied to the other side. It can be seen that the first to fourth transmission lines corresponding to the input port 1 401 and the unequal divider 200 are arranged. Fig. 9b shows the side where ports 2 to 8 (402 to 408) and the scattering distributor 300 are located in Fig. 9a, and Fig. 9c shows the other side where the port 1 401 and the unequal distributor 200 are located in Fig. 9a indicates That is, it can be seen from FIGS. 9A to 9C that the RF power divider can be configured to have a back-to-back ground structure.

According to an embodiment of the present application, in the RF power distributor 100, the electrical length of the fifth transmission line to the tenth transmission line may be 3π/2. In FIG. 8 , it is stated that the electrical length of the fifth transmission line to the tenth transmission line according to the embodiment of the present application may correspond to π/2. However, in implementing the circuit, the transmission line may be reduced depending on the arrangement of output ports and input ports. You need to adjust the length. As shown in Figure 9, the port 2 to port 7 (402 to 407) to which the output of the scattering-type distributor 300 is transmitted, port C 500 for inputting power to the scattering-type distributor 300 can be arranged at the center none. This is the output of port A 201 of the unequal distributor 200 at the center of ports 2 to 7 (402 to 407) to which the output of the scattering distributor 300 is transmitted when the output port is placed in a regular hexagon and its center. This is because port 8 (408) to which this is forwarded is located. In this case, the electrical length of the fifth transmission line to the tenth transmission line π/2 may not be sufficient, and the circuit may be configured with the corresponding electrical length of 3π/2.

10 is a graph showing insertion loss, phase delay, reflection, and isolation according to the frequency of the RF power divider 100 according to an embodiment of the present application. The RF power divider described in FIG. 10 was used, and the distribution ratio of the unequal divider 200 was 6.8:1 and the target frequency was 5.8 GHz.

Referring to FIG. 10, (a) of FIG. 10 shows an insertion loss, (b) is a phase delay, (c) is a loss due to reflection, and (d) is an insulation between output pods. It can be seen that the insertion loss, phase delay, return loss, and insulation performance are respectively 9.3~9.7dB, 4.7° or less, 16dB or more, and 18dB or more at 5.8GHz, and it can be confirmed that all indicators are measured close to simulation. (d) shows the result measured at port 2 (402) because the isolation between each output port is measured similarly.

11 is a schematic block diagram of an RF power distributor 100 according to an embodiment of the present application. The RF power divider 100 may include an unequal divider 200 , a scatter type divider 300 , a plurality of ports 400 , and a port C 500 .

The unequal divider 200 may receive power from the port 1 401 to which power is input to an input terminal, and distribute power to the port A 201 and the port B 202 at a different ratio of power. The sizes of the first to fourth transmission lines and the isolation resistor 210 included in the unequal divider 200 may be determined according to the ratio of the distributed power.

The scattering type divider 300 may distribute power so that power is input to the port C 500 and has an even power ratio to the plurality of output terminals 322 to 327 . The scattering divider 300 redistributes the power output from the unequal divider 200 so that all output terminals receive power of the same size. In addition, the fifth transmission line to the tenth transmission line for distributing power may be included, and the eleventh transmission line to the sixteenth transmission line including the ring resistor 310 may be included, and output impedance matching and output Insulation between terminals can be improved.

The port C 500 may receive power output from the port B 202 of the unequal divider 200 and input it to the scattering type divider 300 , and distribute it to a plurality of output terminals 322 to 327 .

The plurality of ports 400 may transmit power of the same size output from the port A 201 of the unequal divider 200 and the plurality of output terminals 322 to 327 of the scattering type divider 300 to the antenna. Through the plurality of ports 400, the reference RF power of the same size may be supplied.

The above description of the present application is for illustration, and those of ordinary skill in the art to which the present application pertains will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present application. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and likewise components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present application.

1: Wireless power transmission system
2: Active module layer
3: Array antenna layer
4: Wireless power transmission channel
5: Array antenna layer
100: RF power divider
101: reference impedance
200: unequal divider
201: port A
202: port B
210: isolation resistance
220: input terminal
221: a connection point of the first transmission line and the third transmission line
222: connection point of the second transmission line and the fourth transmission line
300: scattering type divider
310: ring resistance
321: random power
322 to 327: second output terminal to seventh output terminal
400: multiple ports
401~408: Port 1 ~ Port 8
500: port C

Claims (11)

An RF power divider comprising:
an unequal divider that receives power from port 1 to which power is inputted to an input terminal and distributes power to port A and port B in different ratios;
a scattering type divider that receives power through port C and distributes power to a plurality of output terminals to have an even power ratio;
a port C for receiving power output from the port B of the unequal divider and distributing it to a plurality of output terminals of the scattering type divider;
A plurality of ports for transmitting power of the same magnitude output from port A of the unequal splitter and a plurality of output terminals of the scattering splitter to the antenna
Including, RF power divider. According to claim 1,
The unequal divider is
a first transmission line having one end connected to the input terminal and the other end connected to one end of the third transmission line;
a second transmission line having one end connected to the input terminal and the other end connected to one end of the fourth transmission line;
a third transmission line having one end connected to the first transmission line and the other end connected to the port A;
a fourth transmission line having one end connected to the second transmission line and the other end connected to the port B; and
an isolation resistor connected to a connection point of the first transmission line and the third transmission line and a connection point between the second transmission line and the fourth transmission line
including,
The plurality of ports,
Including a port 8 for transmitting the power output from the port A to the antenna, RF power splitter. 3. The method of claim 2,
The first transmission line to the fourth transmission line, the RF power distributor will be made of a micro-strip. 4. The method of claim 3,
The first transmission line,
A microstrip coupling line (Coupler Line), the RF power divider. 3. The method of claim 2,
The scattering type distributor,
a fifth transmission line having one end connected to the port C and the other end connected to the second output terminal;
a sixth transmission line having one end connected to the port C and the other end connected to a third output terminal;
a seventh transmission line having one end connected to the port C and the other end connected to a fourth output terminal;
an eighth transmission line having one end connected to the port C and the other end connected to a fifth output terminal;
a ninth transmission line having one end connected to the port C and the other end connected to a sixth output terminal; and
A tenth transmission line having one end connected to the port C and the other end connected to the seventh output terminal
including,
The plurality of ports,
The second output terminal to the RF power splitter comprising ports 2 to 7 for transmitting the power output from the seventh output terminal to the antenna. 6. The method of claim 5,
The scattering type distributor,
an eleventh transmission line having one end connected to the second output terminal and the other end connected to the third output terminal;
a twelfth transmission line having one end connected to the third output terminal and the other end connected to the fourth output terminal;
a thirteenth transmission line having one end connected to the fourth output terminal and the other end connected to the fifth output terminal;
a fourteenth transmission line having one end connected to the fifth output terminal and the other end connected to the sixth output terminal;
a fifteenth transmission line having one end connected to the sixth output terminal and the other end connected to the seventh output terminal;
a 16th transmission line having one end connected to the seventh output terminal and the other end connected to the second output terminal;
Including, RF power divider. 7. The method of claim 6,
The fifth transmission line to the sixteenth transmission line are made of a microstrip, an RF power distributor. 8. The method of claim 7,
The 11th transmission line to the 16th transmission line will include a ring resistor, RF power divider. 6. The method of claim 5,
The port 2 to the port 7 will be disposed in a regular hexagonal shape centered on the port 8, RF power distributor. 6. The method of claim 5,
An RF power divider that uses a Back-to-Back Ground structure. According to claim 1,
wherein the unequal divider is an unequal Wilkinson power divider,
The scattering type divider is a 6-way scattering type power divider, RF power divider.

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