CN105789811A - Self-compensation directional coupler - Google Patents
Self-compensation directional coupler Download PDFInfo
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- CN105789811A CN105789811A CN201610246357.7A CN201610246357A CN105789811A CN 105789811 A CN105789811 A CN 105789811A CN 201610246357 A CN201610246357 A CN 201610246357A CN 105789811 A CN105789811 A CN 105789811A
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- 239000000758 substrate Substances 0.000 claims abstract description 22
- 230000008878 coupling Effects 0.000 abstract description 10
- 238000010168 coupling process Methods 0.000 abstract description 10
- 238000005859 coupling reaction Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
- H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
- H01P5/184—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being strip lines or microstrips
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Abstract
本发明公开一种自补偿定向耦合器，包括多层基板、主线路和副线路，所述主线路和副线路位于多层基板中不同的层，所述主线路中的射频信号被耦合到副线路中，所述副线路为Z形结构。本发明提出了一种新的“Z形”耦合器结构，把副线路设计为“Z形”，此结构能自动补偿因耦合器生产时由制造工艺偏差造成的多层基板的层与层间的主线路和副线路的不对齐，能有效稳定批量生产时耦合器的耦合度和方向性等性能指标在期望的范围之内。本发明结构简单，便于实现，能有效与射频电路融合。
The invention discloses a self-compensating directional coupler, which comprises a multilayer substrate, a main circuit and an auxiliary circuit, the main circuit and the auxiliary circuit are located in different layers of the multilayer substrate, and the radio frequency signal in the main circuit is coupled to the auxiliary circuit In the circuit, the secondary circuit is a Z-shaped structure. The present invention proposes a new "Z-shaped" coupler structure, and the secondary circuit is designed as a "Z-shaped", this structure can automatically compensate the layer-to-layer gap of the multi-layer substrate caused by the deviation of the manufacturing process during the production of the coupler The misalignment of the main line and the auxiliary line can effectively stabilize the performance indicators such as coupling degree and directivity of the coupler during mass production within the expected range. The invention has a simple structure, is easy to implement, and can be effectively integrated with a radio frequency circuit.
Description
技术领域 technical field
本发明涉及一种多层基板的耦合器，具体用于射频功率放大器的多层基板的耦合器。 The invention relates to a multilayer substrate coupler, in particular to a multilayer substrate coupler for a radio frequency power amplifier.
背景技术 Background technique
传统上，这些耦合器的实现通过将两个相邻的PCB板上的射频线和耦合线维持完全重叠对齐以提供射频耦合。这些基于多层基板的耦合器一个限制是，它的方向性和耦合度随着生产过程的变化而变化显著，例如，在射频线和耦合线的层与层之间不对齐，和传输线的刻蚀公差。这导致了使用了这些耦合器的系统的射频输出功率控制不良。 Traditionally, these couplers have been implemented by maintaining full overlapping alignment of the RF and coupled lines on two adjacent PCBs to provide RF coupling. A limitation of these couplers based on multilayer substrates is that their directivity and degree of coupling can vary significantly with changes in the production process, for example, layer-to-layer misalignment in the RF and coupling lines, and the engraving of the transmission lines. Eclipse tolerance. This results in poor RF output power control for systems using these couplers.
现已有几种技术来应对这种耦合器的性能变化和提高这种多层基板耦合器的方向性。例如，补充槽线扩展耦合器的长度来补偿偶模和奇模相速度和提高耦合度等。在《微带线-槽耦合器-设计部分I：非补偿和补偿性耦合器的S-参数》讨论到，ReinmutK.Hoffmanetal.，IEEE微波理论和技术学报，MIT-30卷，8号，1982年8月。各种提高定向耦合器性能的方法包括增加耦合器的额外组件，如在射频线和耦合线的末端增加电感器或并联电容器。另外一种方法涉及把一个浮动金属板放置在平行耦合微带线上来增强线间耦合等。还有《传统微带耦合器的封闭方程应用到设计浮板重叠结构的耦合器和滤波器》提到，”Kuo-ShengChinetal.,IEEE微波理论和技术学报，56卷，5号，2008年5月。另一个提高微带定向耦合器的方向性的技术包括在平行线耦合器的共线端使用反馈元件，使用前馈补偿电路连接到定向耦合器的耦合端以增加方向性/隔离度的耦合器也被提出了。基于多层基板的定向微带线耦合器已经在各种射频功率放大器模块中广泛实施，其原因首先归功于其易于制造和低成本。这种定向耦合器通常设计为在邻近的两层PCB板中分别放置射频线和耦合线，并确保两者相互重叠以提供射频耦合。然而，这种基于多层基板的耦合器有一个缺陷，即它的方向性和耦合度随着制造工艺的变化而发生显著的改变，例如，相邻层上的主线路和副线路的是否完全重叠对齐，还有每条传输线的刻蚀容差等。 Several techniques are available to address the performance variation of such couplers and to improve the directivity of such multilayer substrate couplers. For example, supplementary slot lines extend the length of the coupler to compensate for even-mode and odd-mode phase velocities and improve coupling, etc. Discussed in "Microstrip Line-Slot Couplers - Design Part I: S-Parameters of Uncompensated and Compensated Couplers", Reinmut K. Hoffman et al., IEEE Transactions on Microwave Theory and Technology, MIT-30, No. 8, 1982 August. Various methods of improving the performance of directional couplers include adding additional components to the coupler, such as adding inductors or shunt capacitors at the end of the RF line and the coupled line. Another approach involves placing a floating metal plate on parallel coupled microstrip lines to enhance line-to-line coupling, etc. There is also "Application of Closed Equation of Traditional Microstrip Coupler to Design Coupler and Filter with Floating Plate Overlapping Structure," Kuo-Sheng Chinese et al., IEEE Transactions on Microwave Theory and Technology, Vol. 56, No. 5, 2008 5 Jan. Another technique to improve the directivity of a microstrip directional coupler involves using a feedback element at the common-line end of the parallel-line coupler, using a feed-forward compensation circuit connected to the coupled end of the directional coupler to increase the directivity/isolation Couplers have also been proposed. Directional microstrip line couplers based on multilayer substrates have been widely implemented in various RF power amplifier modules, the reason for which is first of all due to their ease of manufacture and low cost. This directional coupler is usually designed as Place the RF line and the coupling line in adjacent two-layer PCB boards, and ensure that the two overlap each other to provide RF coupling. However, this coupler based on multi-layer substrates has a defect, that is, its directivity and coupling degree Significant changes occur with changes in the manufacturing process, for example, whether the main lines and sub-lines on adjacent layers are completely overlapped and aligned, and the etching tolerance of each transmission line, etc.
发明内容 Contents of the invention
为了解决现有技术存在的不足，本发明的目的是提供一种结构简单并能有效与射频电路融合的自补偿定向耦合器。 In order to solve the deficiencies of the prior art, the object of the present invention is to provide a self-compensating directional coupler which has a simple structure and can be effectively integrated with a radio frequency circuit.
为实现上述目的，本发明所采用的技术方案是： To achieve the above object, the technical solution adopted in the present invention is:
自补偿定向耦合器，包括多层基板、主线路和副线路，所述主线路和副线路位于多层基板中不同的层，所述主线路中的射频信号被耦合到副线路中，所述副线路为Z形结构。 A self-compensating directional coupler includes a multilayer substrate, a main line and an auxiliary line, the main line and the auxiliary line are located at different layers in the multilayer substrate, the radio frequency signal in the main line is coupled into the auxiliary line, the said The secondary circuit is a Z-shaped structure.
进一步地，所述多层基板为4层结构，主线路布置在第一层，副线路布置在第二层。 Further, the multi-layer substrate has a 4-layer structure, the main circuit is arranged on the first layer, and the auxiliary circuit is arranged on the second layer.
进一步地，所述多层基板为6层结构，主线路布置在第二层，副线路布置在第三层。 Further, the multi-layer substrate has a 6-layer structure, the main circuit is arranged on the second layer, and the auxiliary circuit is arranged on the third layer.
本发明的有益效果：本发明提出了一种新的“Z形”耦合器结构，把副线路设计为“Z形”，此结构能自动补偿因耦合器生产时由制造工艺偏差造成的多层基板的层与层间的主线路和副线路的不对齐，能有效稳定批量生产时耦合器的耦合度和方向性等性能指标在期望的范围之内。本发明结构简单，便于实现，能有效与射频电路融合。 Beneficial effects of the present invention: the present invention proposes a new "Z-shaped" coupler structure, and the auxiliary circuit is designed as a "Z-shaped", and this structure can automatically compensate for the multi-layer caused by the deviation of the manufacturing process during the production of the coupler. The misalignment of the main line and the auxiliary line between the layers of the substrate can effectively stabilize the coupling degree and directivity of the coupler and other performance indicators within the expected range during mass production. The invention has a simple structure, is easy to implement, and can be effectively integrated with a radio frequency circuit .
附图说明 Description of drawings
下面结合附图和具体实施方式对本发明作进一步详细说明： Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
图1为本发明的电路结构图。 Fig. 1 is a circuit structure diagram of the present invention.
具体实施方式 detailed description
如图1所示，自补偿定向耦合器，包括多层基板1、主线路2和副线路3，所述主线路2和副线路3位于多层基板1中不同的层，所述主线路2中的射频信号被耦合到副线路3中，所述副线路3为Z形结构。 As shown in Figure 1, the self-compensating directional coupler includes a multilayer substrate 1, a main circuit 2 and a secondary circuit 3, the main circuit 2 and the secondary circuit 3 are located at different layers in the multilayer substrate 1, and the main circuit 2 The radio frequency signal in is coupled into the sub-circuit 3, and the sub-circuit 3 has a Z-shaped structure.
当所述多层基板1为4层结构时，主线路2布置在第一层，副线路3布置在第二层。当所述多层基板1为6层结构时，主线路2布置在第二层，副线路3布置在第三层。 When the multi-layer substrate 1 has a 4-layer structure, the main circuit 2 is arranged on the first layer, and the auxiliary circuit 3 is arranged on the second layer. When the multi-layer substrate 1 has a 6-layer structure, the main circuit 2 is arranged on the second layer, and the auxiliary circuit 3 is arranged on the third layer.
以上所述是本发明的优选实施方式而已，当然不能以此来限定本发明之权利范围，应当指出，对于本技术领域的普通技术人员来说，对本发明的技术方案进行修改或者等同替换，都不脱离本发明技术方案的保护范围。 The above description is only a preferred embodiment of the present invention, and of course it cannot be used to limit the scope of rights of the present invention. It should be pointed out that for those of ordinary skill in the art, any modification or equivalent replacement of the technical solutions of the present invention will Do not depart from the scope of protection of the technical solution of the present invention.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610246357.7A CN105789811A (en) | 2016-04-20 | 2016-04-20 | Self-compensation directional coupler |
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| CN201610246357.7A CN105789811A (en) | 2016-04-20 | 2016-04-20 | Self-compensation directional coupler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109449553A (en) * | 2019-01-10 | 2019-03-08 | 广西芯百特微电子有限公司 | A kind of novel RF coupler and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1383590A (en) * | 2000-06-09 | 2002-12-04 | 三菱电机株式会社 | Directional coupler |
| EP2178155A1 (en) * | 2008-10-16 | 2010-04-21 | Rohde & Schwarz GmbH & Co. KG | Directional coupler with compensation of direction accuracy with target error adjustment |
| US20120019335A1 (en) * | 2010-07-20 | 2012-01-26 | Hoang Dinhphuoc V | Self compensated directional coupler |
| CN205564945U (en) * | 2016-04-20 | 2016-09-07 | 广东工业大学 | Self compensating directional coupler |
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2016
- 2016-04-20 CN CN201610246357.7A patent/CN105789811A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1383590A (en) * | 2000-06-09 | 2002-12-04 | 三菱电机株式会社 | Directional coupler |
| EP2178155A1 (en) * | 2008-10-16 | 2010-04-21 | Rohde & Schwarz GmbH & Co. KG | Directional coupler with compensation of direction accuracy with target error adjustment |
| US20120019335A1 (en) * | 2010-07-20 | 2012-01-26 | Hoang Dinhphuoc V | Self compensated directional coupler |
| TW201222962A (en) * | 2010-07-20 | 2012-06-01 | Skyworks Solutions Inc | Self compensated directional coupler |
| CN205564945U (en) * | 2016-04-20 | 2016-09-07 | 广东工业大学 | Self compensating directional coupler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109449553A (en) * | 2019-01-10 | 2019-03-08 | 广西芯百特微电子有限公司 | A kind of novel RF coupler and device |
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