阅读说明：本技术 一种多端口的无方向功率衰减器 (A kind of directionless power attenuator of multiport ) 是由 张福洪 陆宇斌 易志强 江静 班多兴 贺杰 卓怡琳 于 2019-07-17 设计创作，主要内容包括：本发明公开了一种多端口的无方向功率衰减器,本发明包括十六个π型衰减网络模块、一个16路T型衰减网络模块；本发明中16个π型衰减网络模块与16路T型衰减网络模块相连接；本发明利用简单的π型和T型衰减网络,设计了多端口且是无方向性的功率衰减器,任意端口都可作为输入与输出端口,其具有各端口之间隔离度好,高带宽以及调整衰减数值方便等优点；本发明设计的功率衰减器衰减系数为：π型衰减网络模块的衰减系数A*2+16路T型衰减网络模块的衰减系数B。(The invention discloses a kind of directionless power attenuator of multiport, the present invention includes 16 π type attenuation network modules, a 16 road T-type attenuation network modules；16 π type attenuation network modules are connected with 16 road T-type attenuation network modules in the present invention；The present invention utilizes simple π type and T-type attenuation network, devises multiport and is direction-free power attenuator, and arbitrary port all can be used as input and output port, has many advantages, such as that isolation is good between each port, and high bandwidth and adjustment attenuation value are convenient；The power attenuator attenuation coefficient that the present invention designs are as follows: the attenuation coefficient B of the road the attenuation coefficient A*2+16 T-type attenuation network module of π type attenuation network module.)

1. a kind of directionless power attenuator of multiport, it is characterised in that: including 16 π type attenuation network modules, one 16 road T-type attenuation network modules；

The π type attenuation network module includes first resistor R1, second resistance R2,3rd resistor R3, the connection of the first microwave high-frequency Device J1, the second microwave high-frequency connector J2；

First resistor R1 mono- terminates the one end second resistance R2, another termination the of first resistor R1 in the π type attenuation network module Three one end resistance R3；Second resistance R2 other end ground connection, the 3rd resistor R3 other end are also grounded；First microwave high-frequency connector J1 Signal pins connect the one end first resistor R1, the second microwave high-frequency connector J2 signal pins connect the first resistor R1 other end, form one A π type attenuation network, remaining pin ground connection of the first microwave high-frequency connector J1, the second microwave high-frequency connector J2；

16 road T-type attenuation network module of Suo Su includes the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the Eight resistance R8, the 9th resistance R9, the tenth resistance R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13, 14 resistance R14, the 15th resistance R15, the 16th resistance R16, the 17th resistance R17, the 18th resistance R18, the 19th electricity R19, the 20th resistance R20, third microwave high-frequency connector J3, the 4th microwave high-frequency connector J4, the 5th microwave high-frequency is hindered to connect Meet device J5, the 6th microwave high-frequency connector J6, the 7th microwave high-frequency connector J7, the 8th microwave high-frequency connector J8, the 9th micro- Wave high frequency connectors J9, the tenth microwave high-frequency connector J10, the 11st microwave high-frequency connector J11, the 12nd microwave high-frequency connect Meet device J12, the 13rd microwave high-frequency connector J13, the 14th microwave high-frequency connector J14, the 15th microwave high-frequency connector J15, the 16th microwave high-frequency connector J16, the 17th microwave high-frequency connector J17, the 18th microwave high-frequency connector J18；

One end of the 4th resistance R4 to the 20th all resistance of resistance R20 is connected to one in 16 road T-type attenuation network module of Suo Su It rises, wherein the other end of the 4th resistance R4 to the 19th resistance R19 respectively connects a corresponding microwave high-frequency connector, and second The other end of ten resistance R20 is grounded, and makes to form a T-type attenuation network between each microwave high-frequency connector port；

The signal pins of one of microwave high-frequency connector of each π type attenuation network module and 16 road T-type attenuation network modules In microwave high-frequency connector wherein all the way signal pins connection.

2. a kind of directionless power attenuator of multiport according to claim 1, it is characterised in that: π type attenuation network The attenuation coefficient A of module is greater than the attenuation coefficient B of 16 road T-type attenuation network modules.

3. a kind of directionless power attenuator of multiport according to claim 1, it is characterised in that: π type attenuation network Attenuation coefficient A and input impedance Zc, first resistor R1, second resistance R2, the 3rd resistor R3 of module are related；Formula is as follows.

4. a kind of directionless power attenuator of multiport according to claim 1, it is characterised in that: the decaying of 16 road T-types The attenuation coefficient B and input characteristic impedance Zc of network module, the 20th resistance R20, T-type attenuation network the such as the 4th is electric all the way for certain It is related to the 5th resistance R5 to hinder R4；Formula is as follows:

Technical field

The present invention relates to electronic circuit fields, are mainly concerned with RF/Microwave Integrated Circuits, and in particular to a kind of nothing of multiport Direction power attenuator.

Background technique

Attenuator is a kind of component that can be provided signal and decay, and is widely used in electronic equipment.Its master It acts on: being adjusted by level of the attenuator to signal；Impedance matching is improved by attenuator, plays buffering resistance Anti- effect.

Attenuator is divided to passive attenuator and two kinds of active attenuator.Active attenuator is combined into the matching of other temperature-sensitive elements Variable attenuator, device is in amplifier in automatic gain or slope control circuit.Passive attenuator has fixed attenuator And adjustable attenuator.

The basic material for constituting RF/Microwave power attenuator is resistive material, and usually resistance is power attenuation A kind of citation form of device.Resistance material is placed into the RF/Microwave Integrated Circuits structure of different-waveband by certain technique It is formed the attenuator of corresponding frequencies.Resistance decrement network is divided into T-type attenuation network and π type attenuation network, T-type attenuation network again Network and π type attenuation network can realize the decaying to signal power under the premise of not changing equivalent impedance.

For the multinode network for being in the debugging stage, for the interference for avoiding wireless signal, using multiport attenuator Multiple nodes are connected, with the signal decaying of wire link simulation Radio Link, while avoiding wireless signal lacking vulnerable to interference Point.

Summary of the invention

In view of the deficiencies of the prior art, the present invention proposes a kind of direction-free power attenuations with multiple ports Device.

The technical solution adopted for solving the technical problem of the present invention is as follows:

The present invention uses passive attenuator scheme, including 16 π type attenuation network modules, a 16 road T-type attenuation networks Network module.

The π type attenuation network module includes first resistor R1, second resistance R2,3rd resistor R3, the first microwave high-frequency Connector J1, the second microwave high-frequency connector J2.

First resistor R1 mono- terminates the one end second resistance R2, the first resistor R1 other end in the π type attenuation network module Connect the one end 3rd resistor R3；Second resistance R2 other end ground connection, the 3rd resistor R3 other end are also grounded；The connection of first microwave high-frequency The signal pins of device J1 connect the one end first resistor R1, and the second microwave high-frequency connector J2 signal pins connect the first resistor R1 other end, shape At a π type attenuation network, remaining pin ground connection of the first microwave high-frequency connector J1, the second microwave high-frequency connector J2；

16 road T-type attenuation network module of Suo Su includes the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13, the 14th resistance R14, the 15th resistance R15, the 16th resistance R16, the 17th resistance R17, the 18th resistance R18, 19 resistance R19, the 20th resistance R20, third microwave high-frequency connector J3, the 4th microwave high-frequency connector J4, the 5th microwave High frequency connectors J5, the 6th microwave high-frequency connector J6, the 7th microwave high-frequency connector J7, the 8th microwave high-frequency connector J8, 9th microwave high-frequency connector J9, the tenth microwave high-frequency connector J10, the 11st microwave high-frequency connector J11, the 12nd microwave High frequency connectors J12, the 13rd microwave high-frequency connector J13, the 14th microwave high-frequency connector J14, the 15th microwave high-frequency Connector J15, the 16th microwave high-frequency connector J16, the 17th microwave high-frequency connector J17, the connection of the 18th microwave high-frequency Device J18.

One end connection of 4th resistance R4 to the 20th all resistance of resistance R20 in 16 road T-type attenuation network module of Suo Su Together, wherein the other end of the 4th resistance R4 to the 19th resistance R19 respectively connects a corresponding microwave high-frequency connector, and The other end of 20th resistance R20 is grounded, and makes to form a T-type attenuation network between each microwave high-frequency connector port；

The signal pins of one of microwave high-frequency connector of each π type attenuation network module and 16 road T-type attenuation networks The signal pins of microwave high-frequency connector in module wherein all the way connect.

The present invention has the advantages that compared with the existing technology

The present invention utilizes simple π type and T-type attenuation network, devises multiport and is direction-free power attenuation Device, any port all can be used as input port or output port, and isolation is good between each port, while the function that the present invention designs Rate attenuator has many advantages, such as that high bandwidth and adjustment attenuation value are convenient.

Detailed description of the invention

Fig. 1 is schematic structural view of the invention.

Fig. 2 is π type attenuation network module circuit diagram of the present invention.

The position Fig. 3 16 road T-type attenuation network module circuit diagrams of the present invention.

Specific embodiment

It elaborates with reference to the accompanying drawing.

As shown in Figure 1, the present invention includes 16 π type attenuation network modules and 1 16 road T-type attenuation network module.

As shown in Fig. 2, be π type attenuation network module of the invention, the module include first resistor R1, second resistance R2, 3rd resistor R3, the first microwave high-frequency connector J1, the second microwave high-frequency connector J2.

As shown in Fig. 2, first resistor R1 mono- terminates the one end second resistance R2, first resistor R1 in π type attenuation network module The one end another termination 3rd resistor R3；Second resistance R2 other end ground connection, the 3rd resistor R3 other end are also grounded；First microwave is high The signal pins of frequency connector J1 connect the one end first resistor R1, and it is another that the second microwave high-frequency connector J2 signal pins meet first resistor R1 End, forms a π type attenuation network, the first microwave high-frequency connector J1, the second microwave high-frequency connector J2 remaining pin connect Ground；

As shown in figure 3, being 16 road T-type attenuation network modules of the invention, which includes the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, eleventh resistor R11, the tenth Two resistance R12, thirteenth resistor R13, the 14th resistance R14, the 15th resistance R15, the 16th resistance R16, the 17th resistance R17, the 18th resistance R18, the 19th resistance R19, the 20th resistance R20.Third microwave high-frequency connector J3, the 4th microwave are high Frequency connector J4, the 5th microwave high-frequency connector J5, the 6th microwave high-frequency connector J6, the 7th microwave high-frequency connector J7, Eight microwave high-frequency connector J8, the 9th microwave high-frequency connector J9, the tenth microwave high-frequency connector J10, the 11st microwave high-frequency Connector J11, the 12nd microwave high-frequency connector J12, the 13rd microwave high-frequency connector J13, the connection of the 14th microwave high-frequency Device J14, the 15th microwave high-frequency connector J15, the 16th microwave high-frequency connector J16, the 17th microwave high-frequency connector J17, the 18th microwave high-frequency connector J18.

As shown in figure 3, the 4th resistance R4 to the one of the 20th all resistance of resistance R20 in 16 road T-type attenuation network modules End links together, and connects wherein the other end of the 4th resistance R4 to the 19th resistance R19 respectively connects a corresponding microwave high-frequency Device is connect, and the other end of the 20th resistance R20 is grounded, and makes to form a T-type attenuation network between each microwave high-frequency connector port Network；

The signal pins of one of microwave high-frequency connector of each π type attenuation network module and 16 road T-type attenuation networks The signal pins of microwave high-frequency connector in module wherein all the way connect.

Attenuation coefficient A (dB) and input impedance Zc, first resistor R1, the second electricity of π type attenuation network module of the invention It is related to hinder R2,3rd resistor R3.It for radio-frequency power attenuator, is generally converted without impedance, i.e. input impedance is equal to defeated Impedance out, circuit are in symmetric form, i.e. second resistance R2 is equal to three resistance R3.Formula is as follows:

The attenuation coefficient B and input characteristic impedance Zc of 16 road T-type attenuation network modules of the invention, the 20th resistance R20, T-type attenuation network such as the 4th resistance R4 is related to the 5th resistance R5 all the way for certain.4th resistance R4 is equal to the 5th resistance R5.Formula It is as follows:

Power attenuator of the invention is to reach preferable isolation, will be plus shielding in each π type attenuation network module Cover, to reduce interfering with each other between modules；In 16 road T-type attenuation network modules, equally it is isolated using shielding case, and It is connected with each other between various modules using the good coaxial wire of isolation.

The power attenuator attenuation coefficient that the present invention designs are as follows: attenuation coefficient A (dB) the * 2+16 of π type attenuation network module The attenuation coefficient B (dB) of road T-type attenuation network module.

In the power attenuator that the present invention designs, the attenuation coefficient B (dB) of 16 road T-type attenuation network modules should be smaller, and π The attenuation coefficient A (dB) of type attenuation network module answer it is larger, with reduce 16 road T-type attenuation network inside modules isolations it is limited and Bring interference problem, to improve the isolation between each road of power attenuator.

When the attenuation coefficient B (dB) of 16 road T-type attenuation network module of Zhong Dang of the present invention is larger, 16 road T-type attenuation network moulds The 20th resistance R20 resistance value in block is too small, is difficult to ensure its accuracy, so that the accuracy of decaying is influenced, so when power declines Subtract device attenuation coefficient it is larger when, the attenuation coefficient A (dB) of π type attenuation network module should be improved as far as possible, while reducing by 16 road T The attenuation coefficient B (dB) of type attenuation network module.

Specific work process of the present invention is as follows:

16 π type attenuation network modules are connected to the 16 road each ports of T-type attenuation network module, at this time 16 π type decaying Network module all can be used as input port, non-directional selection.When arbitrarily selected a port is as input terminal, remaining port It is all used as output end, the signal of output is signal of the input signal after overdamping.When change power attenuator attenuation coefficient When, it can choose the resistance value for changing the 20th resistance R20 in 16 road T-type attenuation network modules, change 16 road T-type attenuation networks The attenuation coefficient B (dB) of module；Or π type attenuation network module is directly replaced, change the attenuation coefficient A of π type attenuation network module (dB)。