• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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    • 专利摘要:
    PURPOSE: A power combination device for an LPA is provided to minimize the reflected wave loss of RF signals and insertion loss by forming input and output ports of RF switching unit with asymmectric structure to make the impedance value of the output port be decided by the distribution number and by attaching option switching unit(50) to RF output terminal. CONSTITUTION: A power combination device for an LPA includes followings. A distribution unit(20) separates inputted RF signals into specific number and insulates the signals. An LPA module unit(30) is composed of specific number of LPAs which amplifies the RF signals isolated and separated from the distribution unit(20). An RF switching unit(40) cuts off the RF signals according to the output ports of the RF signals distributed from the distribution unit(20). A combination unit(50) combines the output power generated from the RF switching unit(40). An option switching unit(60) cuts off the output power when the path of the output port is changed by the RF switching unit(40). An alarm/monitor control unit(70) selectively controls the output switching signals and generates control signals for alarm/monitor to send alarm signals when bad RF signals or output power loss is generated from the RF switching unit(40) and the option switching unit(60).
    公开号:KR20000053981A
    申请号:KR1020000026106
    申请日:2000-05-16
    公开日:2000-09-05
    发明作者:김천원
    申请人:김천원；
    IPC主号:
    专利说明:

    Power combiner system for linear power amplifier
    The present invention relates to a power synthesizing apparatus used in a system of a base station or repeater for mobile communication. In particular, in the LPA power synthesizing apparatus, the input and output ports of the RF switching unit have different mismatching structures, and the optional switching unit is additionally added. The present invention relates to a technique for minimizing reflected loss (Loss) of a high frequency signal by forming.
    In general, a high frequency system employs a power splitter for distributing high frequency power to multiple output ports, and a power combiner for synthesizing high frequency power input to multiple ports and outputting them to one port. .
    In other words, the power divider is useful for distributing the high frequency signal input from one signal source to several required parts at a constant ratio, and the power synthesizer combines the ultra high frequency signals output from several signal sources or amplifiers to one antenna. It is also useful for increasing the intensity of the output.
    Such a power divider and a power synthesizer are generally implemented as a single circuit, and an N-way Wilkinson power divider / synthesizer, which is a bidirectional hybrid type divider / synthesizer proposed by Wilkinson, is used.
    FIG. 1 is a circuit diagram of a conventional N-way power divider / synthesizer, which will be briefly described.
    When the high frequency signal RF is input from the first port 1, the input RF signals are respectively distributed and output to the common node CN via the transmission lines 3a, 3b, 3c, and 3d.
    At this time, the first node (N1, N1, N1, N1) is connected to one side of the transmission line (3a, 3b, 3c, 3d), the other side and the second node (N2, N2, N2, N2) Isolation resistors 7a, 7b, 7c, and 7d are commonly connected to common node CN.
    In addition, second ports 5a, 5b, 5c, and 5d for outputting the divided signals are connected to the other side of the transmission lines 3a, 3b, 3c, and 3d, respectively.
    In this case, the wavelength length of the transmission lines 3a, 3b, 3c, and 3d has λ / 4, and the first port 1 is used as a common input and output port, and the second ports 5a, 5b, 5c, 5d) is used to input and output signals individually.
    Further, each of the first and second ports 1, 5a, 5b, 5c, and 5d is connected to a transmitter, a receiver for outputting a high frequency signal, or a high frequency power amplifier circuit for amplifying the high frequency signal.
    That is, when the high frequency signal RF is input to the port 1, the power of the input RF is divided into signals having the same phase and amplitude and separated into n ports.
    At this time, if the input and output of the N-way Wilkinson power divider are changed, the N-way Wilkinson power synthesizer synthesizes the power of the high frequency signal.
    However, the conventional N-way power divider / synthesizer RF switching structure has an input and output port of 50 Ω, so that the impedance loss and reflection due to the impedance imbalance when combined with the strip line or the micro strip line. As the losses increased, the desired output of the LPA was lost.
    Accordingly, an object of the present invention is to solve the above problems, and an object of the present invention is to implement an input / output port of an RF switching unit with a different mismatching structure, so that an impedance value of an output port is determined by a distribution number. Its purpose is to provide a power synthesis device.
    Another object of the present invention is to provide an LPA power synthesis apparatus that adds an optional switching unit to an RF output terminal to minimize reflection wave insertion loss and insertion loss of an RF signal.
    The present invention as a technical idea for achieving the object of the present invention
    A power distribution / synthesis device for LPA which insulates an input RF signal, amplifies power, and then resynthesizes each amplified output power.
    Distribution means for separating and isolating an input RF signal into a predetermined number;
    LPA module means consisting of a predetermined number of LPAs for power amplifying the RF signal isolated from the distribution means,
    RF switching means for blocking the RF signal in accordance with the output port of the RF signal distributed from the distribution means;
    Synthesizing means for synthesizing the output power output from the RF switching means;
    Optional switching means for cutting output power when the path of the output port is changed by the RF switching means; And
    Alarm / monitor control for generating a control signal to selectively control an output switching signal when an RF signal failure and loss of output power are generated from the RF switching means and the option switching means. It provides a power synthesis device for LPA, characterized in that consisting of means.
    1 is a circuit diagram of a conventional N-way power splitter / synthesizer
    Figure 2 is a circuit diagram of a power synthesis apparatus for LPA according to the present invention
    <Description of the symbols for the main parts of the drawings>
    10: isolator 20: distributor
    30: LPA module 40: RF switching unit
    50: synthesizer 60: OPTION switching unit
    70: alarm / monitor control unit
    Hereinafter, with reference to the accompanying drawings, the configuration and operation of the embodiment of the present invention will be described in detail.
    Figure 2 is a circuit diagram of a power synthesis apparatus for LPA according to the present invention.
    Referring to the circuit diagram shown in FIG. 2, a splitter 20 isolating and separating an input RF signal through an isolator 10 in an N-WAY manner, and an RF signal isolated from the splitter 20. LPA module unit 30 made of LPA of the N-WAY method for power amplification, RF switch unit 40 for setting a port of the RF signal distributed from the distributor 20 and cut off the RF signal, the RF switching unit ( A synthesizer 50 for synthesizing the output power output from the 40, and an optional switching unit 60 for cutting the output power when the path of the output port is changed by the RF switching unit 40; And an alarm / monitor control unit 70 for controlling an output switching signal from the RF switching unit 40 and the option switching unit 60 and generating a control signal to alarm through an alarm / monitor.
    In this case, the alarm / monitor control unit 70 selectively controls the output switching signal when a defective RF signal and a loss of output power are generated from the RF switching unit 40 and the option switching unit 60. Generate a control signal to alarm via alarm / monitor.
    Next, the operation of the LPA power synthesis apparatus according to the present invention will be described.
    First, when the RF signal is input from the RF input terminal of the LPA power synthesizer, the input RF signal is distributed and insulated in an N-WAY manner through the distributor 20 provided with the isolators 20a, 20b, and 20c.
    At this time, the isolators 20a, 20b, and 20c prevent the power reflected from the LPA module unit 30 from being reversed.
    The RF signal isolated from the divider 20 is amplified by the power through the LPA module unit 30, and then output through the RF switching unit 40. Of course, the N-WAY method is applied to the LPA module unit 30, and three LPAs 30a, 30b, and 30c are provided.
    At this time, the LPA module unit 30 receives the RF signal transmitted from the user terminal through the antenna of the mobile communication base station or repeater and amplifies the RF signal before transmitting to the other terminal again.
    On the other hand, the RF switching unit 40 selectively blocks the RF signal output when the RF signal output from the LPA module unit 30 is random or defective occurs.
    In the conventional LPA power synthesizer, in the RF switching structure, the impedance value of the input and output ports is implemented at 50 Ω. Therefore, when combined with the strip line, the insertion loss and the reflection loss increase due to the impedance imbalance. I didn't get the output.
    Therefore, in the present invention, in order to implement the input and output ports of the RF switching unit 40 with different mismatching structures, the input port has an impedance value of 50 Ω, and the output port has a distribution number of the divider 20. The RF switching signal is controlled to have an impedance value.
    The impedance value of the output port of the RF switching unit 40 as described above is represented by the following equation.
    Ｚ 0 : Impedance N: Distribution
    This determines the impedance value of each output port.
    Here, the pattern length between the output terminal c of the RF switching unit 40 and the junction point 50d of the combiner 50 has lambda / 2.
    Preferably, the output impedance of the divider 20 has an impedance value of 70.7Ω in the 2-WAY mode, 86.6Ω in the 3-WAY mode, and 100Ω in the 4-WAY mode.
    When a predetermined power is output from each of the LPA modules 30 through the LPAs 30a, 30b, and 30c, the synthesizer 50 synthesizes them.
    At this time, when the loss of the output power output from the synthesizer 50 occurs, that is, when the path of the output port is changed by the RF switching unit 40, the return loss occurs, to minimize the option switching unit 60 This also optimizes insertion loss.
    That is, when the path port is changed by the RF switching unit 40, the reflection loss is also increased. In order to compensate for this, the reflection switching and insertion loss can be minimized by adding the option switching unit 60 to the final output terminal.
    As described above, in order to compensate for the failure of the RF signal and the loss of the output power from the RF switching unit 40 and the option switching unit 60, the alarm / monitor control unit 70 in the RF switching unit 40 And selectively controls the output switching signal of the option switching unit 60.
    In addition, the alarm / monitor control unit 70 generates a control signal so that the alarm can be alarmed through the speaker and displayed on the monitor.
    As described above, according to the LPA power synthesis apparatus according to the present invention has the following advantages.
    First, in combination with the strip line in the conventional RF switching structure, the insertion loss and the reflection loss are increased due to the imbalance of impedance, so that the desired output is not obtained by increasing the LOSS of the synthesizer than the LPA alone test. As in the present invention, the input and output ports of the RF switching unit may be implemented in different mismatching structures to minimize insertion loss and reflection loss of the high frequency signal.
    Second, when the path port is changed by the conventional RF switching unit, the reflection loss is also increased. However, in order to compensate for this, the reflection loss and insertion loss can be minimized by adding an optional switching unit to the final output terminal.
    权利要求:
    Claims (5)
    [1" claim-type="Currently amended] A power distribution / synthesis device for LPA which insulates an input RF signal, amplifies power, and then resynthesizes each amplified output power.
    Distribution means for separating and isolating an input RF signal into a predetermined number;
    LPA module means consisting of a predetermined number of LPAs for power amplifying the RF signal isolated from the distribution means,
    RF switching means for blocking the RF signal in accordance with the output port of the RF signal distributed from the distribution means;
    Synthesizing means for synthesizing the output power output from the RF switching means;
    Optional switching means for cutting output power when the path of the output port is changed by the RF switching means; And
    Alarm / monitor control for generating a control signal to selectively control an output switching signal when an RF signal failure and loss of output power are generated from the RF switching means and the option switching means. LPA power synthesis apparatus, characterized in that consisting of means.
    [2" claim-type="Currently amended] The method of claim 1, wherein the LPA module means for the LPA power synthesis apparatus, characterized in that the N-WAY method.
    [3" claim-type="Currently amended] The power synthesis apparatus for an LPA according to claim 1, wherein a pattern length between the distribution line (a) and the distribution junction (b) and the output terminal (c) of the distribution means has a λ / 2.
    [4" claim-type="Currently amended] The impedance specification of the impedance line of the distribution line (a) of the distribution means and the transmission line between the distribution junction (b) and the output terminal (c) is
    Ｚ 0 : Impedance N: Distribution
    And an input / output port of the RF switching means by implementing a different mismatching structure so that the output port impedance value is determined by the distribution number.
    [5" claim-type="Currently amended] The method of claim 1, wherein the impedance value of the distribution means for the LPA power synthesis characterized in that it has an impedance value of 70.7Ω in the case of 2-way, 86.6Ω in the case of 3-WAY, 100Ω in the case of 4-way Device.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2000-05-16|Application filed by 김천원
    2000-05-16|Priority to KR1020000026106A
    2000-05-16|Priority claimed from KR1020000026106A
    2000-09-05|Publication of KR20000053981A
    2002-12-05|Application granted
    2002-12-05|Publication of KR100363612B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1020000026106A|KR100363612B1|2000-05-16|Power combiner system for Linear Power Amplifier|
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