CN212366168U - Orthogonal coupler - Google Patents
Orthogonal coupler Download PDFInfo
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- CN212366168U CN212366168U CN202021173643.3U CN202021173643U CN212366168U CN 212366168 U CN212366168 U CN 212366168U CN 202021173643 U CN202021173643 U CN 202021173643U CN 212366168 U CN212366168 U CN 212366168U
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Abstract
The embodiment of the utility model discloses quadrature coupler, this quadrature coupler includes: the PCB comprises a bearing structure, a PCB dielectric substrate arranged on the bearing structure, a local windowing metal attached to the back of the PCB dielectric substrate, and a first coupling line and a second coupling line attached to the PCB dielectric substrate; the PCB substrate is sleeved outside the first coupling line and the second coupling line, and the first patch is arranged on the PCB medium substrate. A first groove is concavely arranged on the bearing structure and is attached to the PCB substrate, and the PCB substrate is connected with the first groove through metal arranged at the bottom; the first patch is made of the same material and attached metal as the PCB dielectric substrate and is arranged on the first coupling line and the second coupling line; the metal of windowing in the part that adheres to behind PCB medium base plate forms the second paster, and the second paster is the same with first paster size, and the second paster uses PCB medium base plate as the basis, and the metal is adhered to PCB medium base plate back. The embodiment of the utility model provides a quadrature coupler can solve the low, poor problem of power distribution orthogonal characteristic of quadrature coupler degree of coupling.
Description
Technical Field
The embodiment of the utility model provides a relate to microwave technical field, especially relate to an orthogonal coupler.
Background
At present, with the gradual development of microwave technology, quadrature couplers are gradually applied to various radio frequency circuits to distribute power of microwave signals according to a certain proportion. Generally, two unshielded transmission lines can be attached to each other, and an electric signal is introduced into one of the two transmission lines, so that the one transmission line generates an electromagnetic field, and the electromagnetic field acts on the other transmission line, so that power coupling can be performed between the two transmission lines, and power distribution can be performed on the electric signal.
However, since the orthogonal coupler is limited by the line width, the pitch, and the radiation characteristic of the coupled microstrip line, the degree of coupling of the orthogonal coupler may be low, which may result in a decrease in the coupling performance of the orthogonal coupler and a deterioration in the power distribution orthogonal characteristic.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an orthogonal coupler can solve the problem that the orthogonal coupler degree of coupling is low, power distribution orthogonality characteristic is poor.
In order to solve the technical problem, the embodiment of the utility model provides an adopt following technical scheme:
the utility model discloses a first aspect of the embodiment provides an orthogonal coupler, and this orthogonal coupler includes: the PCB comprises a bearing structure, a PCB dielectric substrate arranged on the bearing structure, a local windowing metal attached to the back of the PCB dielectric substrate, and a first coupling line and a second coupling line attached to the PCB dielectric substrate; the PCB substrate is sleeved outside the first coupling line and the second coupling line, and the first patch is arranged on the PCB medium substrate.
The bearing structure is concavely provided with a first groove, the attached PCB substrate is arranged in the first groove, and the PCB substrate is connected with the first groove through metal arranged at the bottom; the first patch is made of the same material and attached metal as the PCB dielectric substrate and is arranged on the first coupling line and the second coupling line; the metal of windowing in the part that adheres to behind PCB medium base plate forms the second paster, and the second paster is the same with first paster size, and the second paster uses PCB medium base plate as the basis, and the metal is adhered to PCB medium base plate back.
In an embodiment of the present invention, the quadrature coupler includes: the PCB comprises a bearing structure, a PCB dielectric substrate arranged on the bearing structure, a local windowing metal attached to the back of the PCB dielectric substrate, and a first coupling line and a second coupling line attached to the PCB dielectric substrate; the PCB substrate is sleeved outside the first coupling line and the second coupling line, and the first patch is arranged on the PCB medium substrate. The PCB substrate is connected with the first groove through metal arranged at the bottom; the first patch is made of the same material and attached metal as the PCB dielectric substrate and is arranged on the first coupling line and the second coupling line; the metal of windowing in the part that adheres to behind PCB medium base plate forms the second paster, and the second paster is the same with first paster size, and the second paster uses PCB medium base plate as the basis, and the metal is adhered to PCB medium base plate back. Due to the adoption of the microstrip line, the patches with the same thickness as the patches and the corresponding first grooves, the characteristic of broadband orthogonal coupling can be accurately realized; in addition, in the embodiment, the structural grooving mode is adopted to add the PCB substrate and the PCB substrate, and the designed coupling microstrip line and the second patch at the lower part are designed and realized on the same PCB, so that the alignment is accurately realized.
Drawings
Fig. 1 is a cross-sectional view of a quadrature coupler according to an embodiment of the present invention;
fig. 2 is a top view of a quadrature coupler according to an embodiment of the present invention;
fig. 3 is a left side view of a quadrature coupler according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The terms "first" and "second" and the like in the description and claims of the embodiments of the present invention are used for distinguishing different objects, not for describing a specific order of the objects. For example, the first and second coupling lines, etc. are used to distinguish between different media files, rather than to describe a particular order of the media files.
In the description of the embodiments of the present invention, "a plurality" means two or more unless otherwise specified. For example, a plurality of elements refers to two elements or more.
The term "and/or" herein is an association relationship describing an associated object, and means that there may be three relationships, for example, a display panel and/or a backlight, which may mean: there are three cases of a display panel alone, a display panel and a backlight at the same time, and a backlight alone. The symbol "/" herein denotes a relationship in which the associated object is or, for example, input/output denotes input or output.
In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," in an embodiment of the present invention should not be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
The embodiment of the utility model provides an orthogonal coupler, because microstrip line that can adopt and upper and lower equal thickness paster and combine corresponding first recess, the accurate characteristic of realizing the broadband orthogonal coupling; in addition, the design of the microstrip coupler and the second sub-patch at the lower part on the same PCB is completed and realized by adopting the modes of slotting, adding a PCB medium substrate in the slot and covering the PCB substrate, which is beneficial to the accurate realization of alignment.
The following describes a quadrature coupler according to an embodiment of the present invention in detail with reference to the accompanying drawings.
The embodiment of the utility model provides a quadrature coupler, fig. 1 to 3 show the utility model provides a quadrature coupler's that provides structural schematic diagram. As shown in fig. 1 to 3, the quadrature coupler according to the embodiment of the present invention includes: the antenna comprises a bearing structure 11, a first coupling line 12 and a second coupling line 13 which are arranged on a PCB medium substrate 14 on the bearing structure 11, and a first patch 17 which is arranged on the PCB medium substrate 14 and attached with metal.
In the embodiment of the present invention, above-mentioned bearing structure 11 goes up the concave first recess 16 that is equipped with, and the inside packing of first recess 16 has the PCB substrate 18 based on 14 looks isomaterials of PCB medium base plate, bottom are with the metal, and this PCB substrate 18 bottom links to each other with first recess 16, and its thickness and groove depth equal. The metal on the back of the PCB dielectric substrate 14, i.e. the second surface, is opened with a window of a groove size, and the metal with the same size and vertically aligned position as the first patch 17 is retained to form a second patch.
Optionally, in an embodiment of the present invention, the above bearing structure 11 may be specifically prepared by a metal material, and the metal material may be any one of the following: aluminum materials, aluminum alloy materials, iron and other metal materials.
Optionally, in an embodiment of the present invention, the first coupling line and the second coupling line may be made of a metal material; the first coupling line comprises a coupling microstrip line, a reference ground step part and a coupling line compensation part; the second coupling line includes a coupling microstrip line, a reference ground step portion, and a coupling line compensation portion.
It can be understood that the performance of the first coupled line can be finely adjusted by adjusting the reference ground step part and the coupled line compensation part of the first coupled line; the performance of the second coupling line can be finely adjusted by adjusting the reference ground step part and the coupling line compensation part of the second coupling line.
Optionally, in an embodiment of the present invention, the length of the coupling microstrip line of the first coupling line may be L, and the width may be W; the first coupling line may have a ground reference step portion with a length of L1 and a width of W, and a coupling line compensation portion with a length of L2 and a width of W.
Optionally, in an embodiment of the present invention, W may be 0.8mm, L1 may be 0.2mm, L2 may be 0.1mm, and the line width of the 50 ohm microstrip line is calculated based on the low dielectric constant material and the plate thickness; the distance S between the first and second coupled lines is 0.15 mm. It will be appreciated that W may affect the coupling strength of the quadrature coupler, the magnitude of the distance S between the first and second coupled lines affecting the coupling strength of the coupler.
Optionally, in the embodiment of the present invention, the substrate may be specifically prepared from a low dielectric constant material, and the thickness h1 of the substrate may be 0.127 mm.
Optionally, in an embodiment of the present invention, a size (e.g., a length or a width) of the first groove may be larger than a size (e.g., a length or a width) of the first coupling line and the second coupling line, and the size may vary with the size of the coupling lines.
Optionally, in an embodiment of the present invention, the width of the first groove may specifically be 5mm, and the depth of the first groove may specifically be 0.822 mm.
It can be understood that, by setting the size of the first notch, the influence of the first notch on the characteristics of the quadrature coupler can be reduced, so as to improve the accuracy of power distribution performed by the quadrature coupler.
Optionally, in the embodiment of the present invention, the first patch 17 is a metal patch attached to the upper surface of the PCB substrate made of the same material as the PCB substrate; the second patch is formed by etching and reserving formed metal on a second surface of the back of the PCB dielectric substrate 14 to form a second patch.
Optionally, in the embodiment of the present invention, in the first patch, the length of the first patch may be L, the width may be W1, and this W1 is greater than 2W + S, and it can be understood that the first patch may cover the coupling microstrip line of the first coupling line and the coupling microstrip line of the second coupling line in the width direction.
Optionally, in the embodiment of the present invention, for an equivalent second patch, the size of the second patch is consistent with that of the first patch, the length of the second patch may be L, the width may be W1, and this W1 is greater than 2W + S, it can be understood that the second patch can cover the coupling microstrip line of the first coupling line and the coupling microstrip line of the second coupling line in the width direction.
Optionally, in an embodiment of the present invention, the W1 may be specifically 2.05 mm.
Optionally, in the embodiment of the utility model provides an in, at least one first paster can carry out the paster fixed on the definite and follow-up technology of corresponding position through the silk screen printing.
Optionally, in an embodiment of the present invention, the thickness of the first patch may be the same as the thickness of the second patch.
Optionally, in an embodiment of the present invention, the first patch and the equivalent second patch are parallel to each other, and the projection of overlooking is overlapped.
The embodiment of the utility model provides an in, can use the theory of quadrature coupler in the design of microstrip coupler, the microstrip line that adopts promptly and the first paster and the second paster of upper and lower equal thickness to and combine the first groove structure that corresponds, with the characteristic of accurately realizing the broadband quadrature coupling.
Optionally, in an embodiment of the present invention, the above quadrature coupler further includes: a transmission line PCB substrate; wherein, the PCB substrate and the PCB medium substrate 14 have the same thickness and material. The 50 ohm transmission microstrip line on the transmission line PCB substrate is connected with the first coupling line 12 and the second coupling line 13 respectively.
Optionally, in the embodiment of the present invention, the transmission line PCB substrate is made of a low dielectric constant plate.
Optionally, in an embodiment of the present invention, the specific low dielectric constant and the low loss tangent of the dielectric constant of the transmission line PCB substrate are described above.
Optionally, in an embodiment of the present invention, the substrate materials of the PCB substrate, and the first patch may be the same or different.
Optionally, in an embodiment of the present invention, the substrate thickness of the first patch and the PCB substrate thickness may be the same or different, and may be adjusted according to requirements.
The embodiment of the utility model provides an in, transmission line PCB base plate has the same material with the substrate of paster (being first paster or equivalent second paster), is the PCB paster that low dielectric constant dielectric material and thickness are 0.035 mm's metallic copper formation by thickness for h 1. The first patch, the second patch, the coupling microstrip line, the PCB substrate and the designed first groove structure form a main body of the orthogonal coupler.
An embodiment of the utility model provides an orthogonal coupler, this orthogonal coupler includes: the PCB comprises a bearing structure, a PCB dielectric substrate arranged on the bearing structure, a local windowing metal attached to the back of the PCB dielectric substrate, and a first coupling line and a second coupling line attached to the PCB dielectric substrate; the PCB substrate is sleeved outside the first coupling line and the second coupling line, and the first patch is arranged on the PCB medium substrate. The PCB substrate is connected with the first groove through metal arranged at the bottom; the first patch is made of the same material and attached metal as the PCB dielectric substrate and is arranged on the first coupling line and the second coupling line; the metal of windowing in the part that adheres to behind PCB medium base plate forms the second paster, and the second paster is the same with first paster size, and the second paster uses PCB medium base plate as the basis, and the metal is adhered to PCB medium base plate back. Due to the adoption of the microstrip line, the patches with the same thickness and the corresponding first groove, the characteristic of orthogonal coupling of the broadband can be accurately realized; in addition, in the embodiment, the structural grooving mode is adopted to add the PCB substrate and the PCB substrate, and the designed coupling microstrip line and the second patch at the lower part are designed and realized on the same PCB, so that the alignment is accurately realized.
Optionally, in an embodiment of the present invention, the quadrature coupler further includes: a first transmission line and a second transmission line; the first transmission line is connected with the first coupling line, and the second transmission line is respectively connected with the second coupling line; the first transmission line and the first coupled line have the same first reference ground.
Optionally, in an embodiment of the present invention, the first patch has a third and a fourth interval with equal length between the length direction and the first groove.
Optionally, in the embodiment of the present invention, the structure of the quadrature coupler may be analyzed according to the methods of odd-mode and even-mode impedances (Zoo and Zoe):
zoo1 is the odd mode characteristic impedance of the first patch and the equivalent second patch in the quadrature coupler, replacing the sub-patch of finite width W1 with infinity. A similar even mode impedance Zoe has the following approximate formula:
where Zoe1 is the even mode impedance for the same structure. Wherein ZABThe two patches are a first patch and an equivalent second patch which are equal to the length L of the coupling line part, the line width W1, the plate thickness is b, and the suspension height relative to the metal structure ground is h equivalent impedance. The length of L determines the working frequency band of the coupler to a certain extent, the length is approximately equal to lambda/4, and lambda is the working wavelength of the orthogonal coupler. Zoo1 and Zoe1 and ZABIn combination with the structure of the quadrature coupler, determines the characteristic parameters of the quadrature coupler.
The reference discontinuity of the microstrip line at the interface of the coupling line of the orthogonal coupler and the transmission line needs to be compensated to a certain extent. By extending the wire length of the coupler outward beyond the coverage of the first patch and the second patch, the length is L1+ L2. Where the length of L1 is the length of the reference ground discontinuity (i.e., the third or fourth spacing) of the first coupled line (and/or the second coupled line), the length of L1 is approximately equal to the distance between the first patch metal and the second patch metal. L2 is the length (i.e. the third interval) of the first coupled line (and/or the second coupled line) at the same reference ground as the first transmission line (and/or the second transmission line), and is calculated by the following formula:
where ρ 1 and ρ 2 refer to the ratio of the different transition region impedances and Zo; v is the phase velocity in the region L2; c is the capacitance caused by the discontinuity.
The design parameters in the currently designed quadrature coupler can be determined according to the above formula.
In the embodiment of the utility model, L1 length and L2 length are great to the performance influence of quadrature coupler, according to the thickness of the dielectric material of first paster and second paster to and the impedance characteristic between first paster and second paster and the structure reference ground determine the value of corresponding L1 and L2, thereby realize the discontinuous compensation to the impedance that arouses because change of reference ground.
The embodiment of the utility model provides an in, the degree of depth h of the last first recess of bearing structure is the important parameter that influences the orthogonal coupler that designs, and it can produce great influence to the equivalent impedance of coupling microstrip line and first paster and second paster to produce certain influence to the orthogonal coupler characteristic.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention.
Claims (9)
1. A quadrature coupler, characterized in that the quadrature coupler comprises:
the PCB comprises a bearing structure, a PCB dielectric substrate arranged on the bearing structure, a local windowing metal attached to the back of the PCB dielectric substrate, and a first coupling line and a second coupling line attached to the PCB dielectric substrate; the PCB substrate is sleeved outside the first coupling line and the second coupling line, and the first patch is arranged on the PCB medium substrate;
the PCB substrate is connected with the first groove through metal arranged at the bottom; the first patch is made of the same material and attached metal as the PCB dielectric substrate and is arranged on the first coupling line and the second coupling line; and the second patch is the same as the first patch in size and is based on the PCB medium substrate, and the metal is attached to the back of the PCB medium substrate.
2. The quadrature coupler of claim 1 wherein said first patch and said second patch are disposed parallel to each other.
3. The quadrature coupler of claim 1 or 2 wherein the dielectric material of the first patch PCB is the same thickness as the dielectric material of the coupled line substrate, and the first patch metal and the first coupled line and the second coupled line on the PCB dielectric substrate, and the metal of the second patch are equally spaced.
4. The quadrature coupler of claim 3 wherein said first patch is placed in alignment with said second patch.
5. The quadrature coupler of claim 1 wherein the PCB dielectric substrate is a substrate of the quadrature coupler that couples a microstrip line, a transmission microstrip line and the second patch.
6. The quadrature coupler of claim 5 wherein said PCB dielectric substrate is fabricated from a high frequency low dielectric constant board material.
7. The quadrature coupler of claim 1 further comprising: a first transmission line and a second transmission line; the first transmission line is connected with the first coupling line, and the second transmission line is connected with the second coupling line; the first and second transmission lines and the first and second coupled lines have the same first reference ground.
8. The quadrature coupler of claim 7 wherein a first metal line of the first transmission line and the first coupled line is spaced apart from a second metal line of the second transmission line and the second coupled line by a spacing distance, the spacing distance satisfying a predetermined relationship.
9. The quadrature coupler of claim 8 wherein said spacing distance is obtained by a predetermined algorithm relative to the spacing of said coupled lines, and varies according to the width of the coupled lines, and said spacing of said coupled lines is the spacing between said first coupled line and said second coupled line.
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| CN202021173643.3U CN212366168U (en) | 2020-06-23 | 2020-06-23 | Orthogonal coupler |
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| CN202021173643.3U CN212366168U (en) | 2020-06-23 | 2020-06-23 | Orthogonal coupler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697306A (en) * | 2020-06-23 | 2020-09-22 | 西安博瑞集信电子科技有限公司 | Orthogonal coupler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111697306A (en) * | 2020-06-23 | 2020-09-22 | 西安博瑞集信电子科技有限公司 | Orthogonal coupler |
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Address after: Building 12, Hard Technology Enterprise Community, No. 3000 Biyuan Second Road, High tech Zone, Xi'an City, Shaanxi Province, 710065 Patentee after: Borui Jixin (Xi'an) Electronic Technology Co.,Ltd. Address before: 22nd floor, East Building, block B, Tengfei Kehui City, 88 Tiangu 7th Road, Yuhua Street office, high tech Zone, Xi'an, Shaanxi 710000 Patentee before: XI'AN BORUI JIXIN ELECTRONIC TECHNOLOGY Co.,Ltd. |