CN203932267U - Coaxial harmonic connector - Google Patents
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- CN203932267U CN203932267U CN201320892211.1U CN201320892211U CN203932267U CN 203932267 U CN203932267 U CN 203932267U CN 201320892211 U CN201320892211 U CN 201320892211U CN 203932267 U CN203932267 U CN 203932267U
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Abstract
本实用新型公开了同轴谐波滤波连接器,包括外壳,外壳内设置有谐波滤波器,谐波滤波器的两端分别连接有输入接头和输出接头;所述谐波滤波器中串联电感和并联电容分别用同轴高阻抗线和低阻抗线代替;所述的输入接头为微带同轴连接器的输入接头。本实用新型将功率放大器的射频输出连接器,抑制谐波输出的滤波器,及发射机的功率输出连接器进行了一体化创新设计,实现了将多个单一功能的微波器件联系到一起,既使发射机的谐波输出达到了较高的技术指标要求,又简化了电路、缩小了体积、降低了功率损耗和经济成本、进一步提高了设备适用性和可靠性。
The utility model discloses a coaxial harmonic filter connector, which comprises a shell, and a harmonic filter is arranged inside the shell, and the two ends of the harmonic filter are respectively connected with an input joint and an output joint; the series inductor in the harmonic filter and parallel capacitors are replaced by coaxial high-impedance lines and low-impedance lines respectively; the input connector is an input connector of a microstrip coaxial connector. The utility model integrates the RF output connector of the power amplifier, the filter for suppressing the harmonic output, and the power output connector of the transmitter, and realizes the connection of a plurality of single-function microwave devices. The harmonic output of the transmitter meets higher technical index requirements, and the circuit is simplified, the volume is reduced, the power loss and economic cost are reduced, and the applicability and reliability of the equipment are further improved.
Description
技术领域 technical field
本实用新型属于微波通信技术领域,尤其涉及同轴谐波滤波连接器。 The utility model belongs to the technical field of microwave communication, in particular to a coaxial harmonic filter connector.
背景技术 Background technique
谐波输出是发射机的一项重要技术指标。发射机作为电子系统的功率信号输出设备,在其输出的功率信号当中,除了规定要求的有用信号功率之外,往往还有一些无用或有害的功率成分存在,谐波输出就是其中最为典型的部分。 Harmonic output is an important technical index of the transmitter. As the power signal output device of the electronic system, the transmitter often has some useless or harmful power components in the output power signal, in addition to the required useful signal power, and the harmonic output is the most typical part of it. .
现有的同轴谐波滤波器件,电路复杂,结构庞大,且需要导线等安装在功率放大器输出端,整体滤波、稳定性能不能满足需求,安装不方便。 The existing coaxial harmonic filter device has complex circuits and a huge structure, and requires wires to be installed at the output end of the power amplifier. The overall filtering and stability performance cannot meet the requirements, and the installation is inconvenient.
实用新型内容 Utility model content
本实用新型的目的是提供同轴谐波滤波连接器,能实现多个单一功能的微波器件集成到一起,电路简单、结构紧凑、安装方便,又减少了插入损耗,提高了设备整体的可靠性。 The purpose of this utility model is to provide a coaxial harmonic filter connector, which can realize the integration of multiple single-function microwave devices, has simple circuit, compact structure, convenient installation, reduces insertion loss, and improves the overall reliability of the equipment. .
本实用新型采用下述技术方案: The utility model adopts the following technical solutions:
同轴谐波滤波连接器,包括外壳,外壳内设置有谐波滤波器,谐波滤波器的两端分别连接有输入接头和输出接头;所述谐波滤波器中串联电感和并联电容分别用同轴高阻抗线和低阻抗线代替。 The coaxial harmonic filter connector includes a shell, and a harmonic filter is arranged in the shell, and the two ends of the harmonic filter are respectively connected with an input joint and an output joint; the series inductor and the parallel capacitor in the harmonic filter are respectively used Coaxial high-impedance and low-impedance lines instead.
所述的输入接头为微带同轴连接器的输入接头。 The input connector is an input connector of a microstrip coaxial connector.
所述的输出接头采用标准的N型射频同轴连接器的输出接头。 The output connector adopts the output connector of a standard N-type radio frequency coaxial connector.
所述的外壳采用通用的N型KFK连接器的通用结构外壳。 The shell adopts a common structural shell of a common N-type KFK connector.
所述的谐波滤波器为低通原型滤波器。 The harmonic filter is a low-pass prototype filter.
本实用新型结构简单,它将功率放大器的射频输出连接器,抑制谐波输出的滤波器,及发射机的功率输出连接器进行了一体化创新设计,实现了将多个单一功能的微波器件联系到一起,既使发射机的谐波输出达到了较高的技术指标要求,又简化了电路、缩小了体积、降低了功率损耗和经济成本、进一步提高了设备适用性和可靠性。 The utility model has a simple structure. It integrates and innovates the RF output connector of the power amplifier, the filter for suppressing harmonic output, and the power output connector of the transmitter, and realizes the connection of multiple single-function microwave devices. Together, the harmonic output of the transmitter meets the higher technical index requirements, and the circuit is simplified, the volume is reduced, the power loss and economic cost are reduced, and the applicability and reliability of the equipment are further improved.
附图说明 Description of drawings
图1a为本实用新型所述谐波滤波器中传输线小段的示意图; Fig. 1 a is the schematic diagram of the small section of the transmission line in the harmonic filter described in the present invention;
图1b为本实用新型所述谐波滤波器中传输线小段T型等效电路的示意图; Fig. 1 b is the schematic diagram of the T-shaped equivalent circuit of transmission line segment in the harmonic filter described in the utility model;
图1c为本实用新型所述谐波滤波器中传输线小段П型等效电路的示意图; Fig. 1c is the schematic diagram of the equivalent circuit of transmission line segment П type in the harmonic filter described in the utility model;
图2为本实用新型所述同轴谐波滤波电路模型图; Fig. 2 is a model diagram of the coaxial harmonic filter circuit described in the utility model;
图3为本实用新型结构外型示意图; Fig. 3 is a schematic view of the structure of the utility model;
图4为本实用新型的阻带抑制特性仿真图; Fig. 4 is the simulation diagram of the stop band suppression characteristic of the present utility model;
图5为本实用新型的通带衰减和端口驻波仿真图。 Fig. 5 is a simulation diagram of passband attenuation and port standing wave of the present invention.
具体实施方式 Detailed ways
如图3所示,同轴谐波滤波连接器,包括外壳2,外壳2内设置有谐波滤波器,谐波滤波器的两端分别连接有输入接头3和输出接头1;所述谐波器中串联电感和并联电容分别用同轴高阻抗线和低阻抗线代替,从而构成低通原型滤波器,从而实现谐波滤波。 As shown in Figure 3, the coaxial harmonic filter connector includes a shell 2, and a harmonic filter is arranged in the shell 2, and the two ends of the harmonic filter are respectively connected to an input joint 3 and an output joint 1; The series inductance and parallel capacitance in the filter are replaced by coaxial high-impedance lines and low-impedance lines respectively, thus forming a low-pass prototype filter, thereby realizing harmonic filtering.
低通原型滤波器由一系列串联电感和并联电容交替连接所组成的,在微波电路中,一个传输线小段可以等效为电容和电感组成的T形或П形网络;图1a-图1c中,I表示传输线小段的长度,Z0和Y0是其阻抗和导纳。在T型等效电路中,其等效电抗X和电纳分别为B: The low-pass prototype filter is composed of a series of series inductors and parallel capacitors connected alternately. In microwave circuits, a small section of transmission line can be equivalent to a T-shaped or П-shaped network composed of capacitors and inductors; in Figure 1a-Figure 1c, I represents the length of the small segment of the transmission line, and Z0 and Y0 are its impedance and admittance. In the T-type equivalent circuit, its equivalent reactance X and susceptance are B respectively:
在П型等效电路中,其等效电抗X和电纳B分别为: (3) In the П-type equivalent circuit, its equivalent reactance X and susceptance B are: (3)
上式的近似等效要求。当传输线很短且端接恰当时,则可近似认为其与一个单独的电抗元件相等效。对于两端接有高阻抗线的低阻抗传输线小段来说,在其T型等效电路中的串联电抗X很小,而其两端串接的高阻抗线的电抗很大,故X可以忽略,于是可以等效为一个单独的并联电容。同理,对于两端接有低阻抗线的高阻抗传输线小段来说,在其П型等效电路中的并联电纳B很小,而其两端并接的低阻抗线的电纳很大,故B亦可以忽略,因此其电路可以等效为一个单独的串联电感。 The approximate equivalent requirement of the above formula . When the transmission line is short and properly terminated, it can be approximated as equivalent to a single reactive element. For a small section of low-impedance transmission line with high-impedance lines connected at both ends, the series reactance X in its T-shaped equivalent circuit is very small, while the reactance of the high-impedance lines connected in series at both ends is very large, so X can be ignored , so it can be equivalent to a single parallel capacitor. Similarly, for a small section of high-impedance transmission line with low-impedance lines connected at both ends, the parallel susceptance B in its П-type equivalent circuit is very small, while the susceptance of the low-impedance line connected at both ends is very large , so B can also be ignored, so its circuit can be equivalent to a single series inductor.
同轴线的特性阻抗Z0与其内导体外径a和外导体内径b之间的关系为: (欧姆)( 5)式中:和分别是同轴线两导体间填充介质的相对介电常数和相对磁导率。 The relationship between the characteristic impedance Z0 of the coaxial line and the outer diameter a of the inner conductor and the inner diameter b of the outer conductor is: (Ohm) (5) where: and are the relative permittivity and relative permeability of the filling medium between the two conductors of the coaxial line, respectively.
若滤波元件中的串联电感和并联电容分别用同轴高阻抗线和低阻抗线来实现,则无论串联电感还是并联电容都将与同轴线的阻抗值和线段长度有关,而阻抗只与同轴线内外导体的尺寸有关,其长度则与频率有关。考虑到结构设计尺寸的加工合理性及导体损耗和平均功率的传输特性,本实施例中选定高阻抗为100欧姆,低阻抗为25欧姆;考虑到通带最大衰减LAr≤0.3dB,阻带最小衰减LA≥40dB,取元件数目n=11,其同轴滤波电路设计模型如图2所示。 If the series inductance and parallel capacitance in the filter element are realized by coaxial high-impedance lines and low-impedance lines respectively, then both the series inductance and parallel capacitance will be related to the impedance value of the coaxial line and the length of the line segment, while the impedance is only related to the coaxial line. The size of the inner and outer conductors of the axis is related, and its length is related to the frequency. Considering the processing rationality of the structural design size and the transmission characteristics of conductor loss and average power, the selected high impedance is 100 ohms and the low impedance is 25 ohms in this embodiment; considering the maximum attenuation of the passband LAr≤0.3dB, the stopband The minimum attenuation LA≥40dB, the number of components is n=11, and the design model of the coaxial filter circuit is shown in Figure 2.
在结构实现上,输入接头3设计为微带同轴连接器形式,输出接头1则直接采用标准的N型射频同轴连接器形式;在安装方式的设计上,采用通用的N型KFK连接器的通用结构形式。整个谐波滤波连接器的结构外型示意如图3所示。 In terms of structural realization, the input connector 3 is designed in the form of a microstrip coaxial connector, and the output connector 1 is directly in the form of a standard N-type RF coaxial connector; in the design of the installation method, a general-purpose N-type KFK connector is used general structural form. The structural appearance of the entire harmonic filter connector is shown in Figure 3.
所述的输入接头为微带同轴连接器的输入接头3,所述的输出接头1采用标准的N型射频同轴连接器的输出接头1,所述的外壳采用通用的N型KFK连接器的通用结构外壳。该同轴谐波滤波连接器的设计,不仅电路简单、结构紧凑、安装方便,而且由于巧妙地进行了一体化集成处理,从而原有的功率电缆插入端口时的插入损耗,改善了端口驻波,并且降低了成本,提高了发射机效率和设备可靠性。 The input connector is the input connector 3 of the microstrip coaxial connector, the output connector 1 adopts the output connector 1 of the standard N-type radio frequency coaxial connector, and the shell adopts the universal N-type KFK connector general structure shell. The design of the coaxial harmonic filter connector is not only simple in circuit, compact in structure and easy to install, but also due to the ingenious integrated processing, the insertion loss of the original power cable when inserted into the port improves the port standing wave , and reduces cost, improves transmitter efficiency and equipment reliability.
图4、图5所示:选用铜材和空气介质,使用Ansoft微波仿真软件对滤波器连接器的电路进行建模仿真和优化设计。通过改变高低阻抗线段的长度和同轴连接器的结构参数数值对滤波器电路的通带衰减和阻带抑制特性进行优化计算,得到的仿真结果。 As shown in Figure 4 and Figure 5: choose copper material and air medium, use Ansoft microwave simulation software to model, simulate and optimize the design of the filter connector circuit. By changing the length of the high and low impedance line segments and the structural parameter values of the coaxial connector, the passband attenuation and stopband suppression characteristics of the filter circuit are optimized and calculated, and the simulation results are obtained.
根据工程需要,实际设计的谐波滤波连接器的外形尺寸为85 mm×35 mm×25mm,其主要技术指标测试结果;通过实施例中可以看出,除了频带宽度、谐波抑制、端口驻波能够很好的满足要求外,其插入损耗较以前大约改善了0.85dB,相当于在同样条件下,使功放输出功率提高了17.8%。 According to the needs of the project, the actual design of the harmonic filter connector has an overall size of 85mm×35mm×25mm, and the test results of its main technical indicators; it can be seen from the examples that, in addition to the frequency bandwidth, harmonic suppression, port standing wave In addition to being able to meet the requirements well, its insertion loss has improved by about 0.85dB compared with the previous one, which is equivalent to increasing the output power of the power amplifier by 17.8% under the same conditions.
实践证明,这一谐波滤波连接器的设计,不仅电路简单、结构紧凑、安装方便,而且由于巧妙地进行了一体化集成处理,从而减小了插入损耗,改善了端口驻波,并且降低了成本,提高了发射机效率和设备可靠性。 Practice has proved that the design of this harmonic filter connector not only has a simple circuit, compact structure, and convenient installation, but also reduces insertion loss, improves port standing waves, and reduces cost, improved transmitter efficiency and equipment reliability.
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