CN216903297U - Quadrature coupler and radio frequency module - Google Patents
Quadrature coupler and radio frequency module Download PDFInfo
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- CN216903297U CN216903297U CN202220351564.XU CN202220351564U CN216903297U CN 216903297 U CN216903297 U CN 216903297U CN 202220351564 U CN202220351564 U CN 202220351564U CN 216903297 U CN216903297 U CN 216903297U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The utility model provides a quadrature coupler and a radio frequency module, which are provided with an input end, an in-phase output end, an isolation end and a quadrature output end, and comprise: one end of the first transmission line group is connected with the input end, and the other end of the first transmission line group is connected with the in-phase output end; one end of the second transmission line group is connected with the orthogonal output end, and the other end of the second transmission line group is connected with the isolation end; the first transmission line group and the second transmission line group are both formed by at least two layers of transmission lines, each layer of transmission line comprises at least two transmission lines, the at least two layers of transmission lines form a laminated structure, and the coupling of the laminated structure comprises side coupling between the transmission lines on the same layer and plane coupling between the transmission lines on the upper layer and the lower layer. By providing the coupler with the laminated structure, the orthogonal coupler provided by the utility model has smaller size than the traditional structure, and is beneficial to integration in a chip.
Description
Technical Field
The utility model relates to the technical field of couplers, in particular to a quadrature coupler and a radio frequency module.
Background
As mobile communication is continuously pushed to high frequency bands, such as 5G millimeter wave frequency bands, the corresponding spectrum wavelength enters millimeter magnitude, and the size of the device becomes more compact correspondingly. The radio frequency/millimeter wave front end integrates the functions of amplification, frequency conversion and transceiving into one chip, which greatly improves the compactness of the link size.
The orthogonal coupler is a general microwave/millimeter wave component, can be used for isolation, distribution and synthesis of signals, has main technical indexes including directivity, coupling degree, insertion loss and the like, and is gradually applied to various radio frequency circuits. As shown in fig. 1, a conventional quadrature coupler includes an input end 101, an in-phase output end 102, an isolation end 103, and a quadrature output end 104, where two unshielded transmission lines are arranged in parallel, and an electrical signal is input to one of the two unshielded transmission lines, so that the one transmission line generates an electromagnetic field, and the electromagnetic field acts on the other transmission line, so that the two transmission lines can perform power coupling, and thus power distribution on the electrical signal is achieved. The overall size of the quadrature coupler shown in fig. 1 is large and difficult to integrate on-chip.
SUMMERY OF THE UTILITY MODEL
The utility model provides an orthogonal coupler and a radio frequency module, which are used for solving the problem that the orthogonal coupler in the prior art is difficult to integrate in a chip due to larger integral size.
In a first aspect, the present invention provides a quadrature coupler having an input terminal, an in-phase output terminal, an isolation terminal, and a quadrature output terminal, comprising:
one end of the first transmission line group is connected with the input end, and the other end of the first transmission line group is connected with the in-phase output end;
and one end of the second transmission line group is connected with the orthogonal output end, and the other end of the second transmission line group is connected with the isolation end.
The first transmission line group and the second transmission line group are both formed by at least two layers of transmission lines, each layer of transmission line comprises at least two transmission lines, the at least two layers of transmission lines form a laminated structure, and the coupling of the laminated structure comprises side coupling between the transmission lines on the same layer and plane coupling between the transmission lines on the upper layer and the lower layer.
In an embodiment of the present invention, the at least two layers of transmission lines include a first layer of transmission lines and a second layer of transmission lines, the first layer of transmission lines includes a first transmission line and a fourth transmission line, the second layer of transmission lines includes a second transmission line and a third transmission line corresponding to the first transmission line and the fourth transmission line, the first transmission line and the second transmission line realize plane coupling, and the first transmission line and the fourth transmission line realize side coupling.
In an embodiment of the utility model, the first transmission line group includes a second transmission line and a fourth transmission line, and the second transmission line group includes a first transmission line and a third transmission line.
In an embodiment of the present invention, the first transmission line and the fourth transmission line on the upper layer and the second transmission line and the third transmission line on the lower layer and corresponding to the first transmission line and the fourth transmission line are respectively wound from inside to outside in a side-by-side manner to form a first coil having a first preset shape.
In an embodiment of the present invention, the orthogonal coupler further includes a second coil having a second preset shape, the first coil and the second coil are connected through a metal through hole, the first preset shape is the same as or different from the second preset shape, and the second coil is a mirror image coil of the first coil.
In an embodiment of the utility model, the first predetermined shape or the second predetermined shape is a polygon or a circle.
In an embodiment of the present invention, the orthogonal coupler is located on a grounded metal layer, and the orthogonal coupler further includes a grounded capacitor, the grounded capacitor is formed by a grid ground structure of the grounded metal layer, and gaps and line widths of the grid ground structure are used for adjusting a coupling degree of the orthogonal coupler.
In an embodiment of the present invention, widths of the first transmission line, the second transmission line, the third transmission line, and the fourth transmission line are the same or different; the lengths of the first transmission line, the second transmission line, the third transmission line and the fourth transmission line are the same.
In an embodiment of the utility model, the isolation terminal is grounded after being connected in series with a resistor with a preset value.
In a second aspect, the present invention further provides a radio frequency module applied to a front end of a transceiver, the radio frequency module including the quadrature coupler according to any one of the first aspect.
According to the orthogonal coupler and the radio frequency module provided by the utility model, the coupler with the laminated structure is provided, so that the orthogonal coupler is smaller than the conventional structure in size, and the orthogonal coupler is beneficial to integration in a chip.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other embodiments can be obtained by using the drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art quadrature coupler;
FIG. 2 is a schematic diagram of a quadrature coupler according to the present invention;
FIG. 3(a) is one of the exploded views of FIG. 2;
FIG. 3(b) is a second exploded view of FIG. 2;
FIG. 3(c) is a partial enlarged view of FIG. 2;
FIG. 4 is a perspective view of a quadrature coupler provided by the present invention;
FIG. 5 is a top view of FIG. 4;
FIG. 6 is a bottom view of FIG. 4;
FIG. 7 is a left side view of FIG. 4;
fig. 8 is a schematic diagram of a first transmission line group provided by the present invention;
fig. 9 is a schematic diagram of a second transmission line group provided by the present invention;
FIG. 10 is a schematic view of the structure of a grid provided by the present invention;
FIG. 11 is a schematic diagram of the amplitude and phase errors of a quadrature coupler provided by the present invention;
FIG. 12 is a schematic illustration of the scattering parameters of a quadrature coupler provided by the present invention;
FIG. 13 is a schematic diagram of the loss of a quadrature coupler provided by the present invention;
FIG. 14 is a schematic diagram of the down conversion of the present invention applied to a quadrature mixer;
fig. 15 is a schematic diagram of the upconversion of the utility model applied to a quadrature mixer;
FIG. 16 is a schematic diagram of the utility model as applied to a balanced amplifier;
fig. 17 is a schematic diagram of the present invention applied to a power amplifier;
reference numerals:
100: a quadrature coupler; 101: an input end; 102: an in-phase output terminal;
103: an isolation end; 104: a quadrature output; 105: a first transmission line group;
106: a second transmission line group; 107: a metal via; 108: a first layer of transmission lines;
109: a second layer of transmission lines; 110: a first transmission line; 111: a second transmission line;
112: a third transmission line; 113: a fourth transmission line; 114: a first coil;
115: a second coil; 116: a first connection mode; 117: a second connection mode;
118: a third connection mode; 119: a metal layer; 120: and (4) grid ground structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein.
In order to solve the problems that the overall size of the orthogonal coupler in the prior art is large and integration in a chip is difficult, the orthogonal coupler and the radio frequency module are provided.
The quadrature coupler and the rf module according to the present invention are described below with reference to fig. 1 to 17.
Fig. 2 is a schematic structural diagram of a quadrature coupler provided by the present invention, fig. 3(a) is one of exploded views of fig. 2, and fig. 3(b) is a second exploded view of fig. 2, as shown in fig. 2, fig. 3(a), and fig. 3 (b).
As shown in fig. 2, a quadrature coupler 100 according to the present invention has four ports, i.e., an input port 101, an in-phase output port 102, an isolation port 103, and a quadrature output port 104. Wherein the output signal (90) at the quadrature output 104 differs from the output signal (0) at the in-phase output 102 by 90 °.
Decomposing fig. 2 into fig. 3(a) and 3(b), as shown in fig. 3(a) and 3(b), the quadrature coupler 100 includes a first transmission line group 105 and a second transmission line group 106. One end of the first transmission line group 105 is connected to the input terminal 101, and the other end is connected to the in-phase output terminal 102. One end of the second transmission line group 106 is connected to the quadrature output terminal 104, and the other end is connected to the isolation terminal 103.
The first transmission line group 105 and the second transmission line group 106 are formed by at least two layers of transmission lines, each layer of transmission line includes at least two transmission lines, the at least two layers of transmission lines form a laminated structure, and the coupling of the laminated structure includes side coupling between transmission lines on the same layer and plane coupling between transmission lines on upper and lower layers.
Illustratively, as shown in fig. 2, the connections between the transmission lines of the stacked structure may be connected through metal vias 107.
Illustratively, the isolation terminal 103 is grounded by connecting a resistor with a predetermined value in series, for example, the resistor with the predetermined value is a 50 ohm resistor.
Therefore, by the above-mentioned coupling technology with a laminated structure, the planar transmission line in the prior art can be improved into a transmission line with a three-dimensional structure, and the physical size of the orthogonal coupler can be reduced.
Illustratively, the at least two layers of transmission lines include a first layer of transmission lines 108 and a second layer of transmission lines 109. The first layer transmission line 108 includes a first transmission line 110 and a fourth transmission line 113, the second layer transmission line 109 includes a second transmission line 111 and a third transmission line 112 corresponding to the first transmission line 110 and the fourth transmission line 113, that is, the first transmission line 110 and the second transmission line 111 are in a top-bottom layer relationship, the fourth transmission line 113 and the third transmission line 112 are in a top-bottom layer relationship, the first transmission line 110 and the fourth transmission line 113 are in a same layer relationship, and the second transmission line 111 and the third transmission line 112 are in a same layer relationship. The first transmission line 110 is in planar coupling with the second transmission line 111, and the first transmission line 110 is in lateral coupling with the fourth transmission line 113.
Illustratively, the first transmission line 110 is coupled to the second transmission line 111 and the fourth transmission line 113, respectively, and if the first transmission line 110 and the third transmission line 112 are taken as the second transmission line group (also referred to as coupled transmission line group) 105, the second transmission line 111 and the fourth transmission line 113 are taken as the first transmission line group (also referred to as through transmission line group) 106.
Note that, the second transmission line 111 and the fourth transmission line 113 may be used as the second transmission line group 106, and the first transmission line 110 and the third transmission line 112 may be used as the first transmission line group 105. However, regardless of which group of transmission lines is used as the first transmission line group 105 or the second transmission line group 106, the first transmission line group 105 or the second transmission line group 106 is formed of transmission lines of at least two layers.
Although the enlarged view on the right side of fig. 3(c) shows two layers of transmission lines (the first layer transmission line 108 and the second layer transmission line 109), and each layer of transmission line includes two transmission lines, for example, the first layer transmission line 108 includes the first transmission line 110 and the fourth transmission line 113, and the second layer transmission line 109 includes the second transmission line 111 and the third transmission line 112. However, the present invention is not limited to the two layers of transmission lines, and is not limited to each layer of transmission line including two transmission lines, that is, the present invention may include more than two transmission lines, and each layer of transmission line may include more than two transmission lines.
Assuming that the prior art quadrature coupler is formed by four transmission lines side by side on a plane, the quadrature coupler of the present invention can modify the four transmission lines to be formed by two transmission lines side by side on the plane, and the other two transmission lines are of an upper-lower layer structure, thereby forming four transmission lines of a laminated structure, and theoretically reducing the physical size by 50%.
It should be noted that, as shown in fig. 3(c), the coupling degree of the stacked structure can be adjusted by the distance D between the transmission lines on the same layer. The distance D between the transmission lines on the same layer, the distance H between the stacked layers, and the line width W of each transmission line can be designed according to actual requirements, which is not limited in the present invention.
Because the utility model is the orthogonal coupler with the laminated structure, the utility model has the side coupling between the transmission lines on the same layer and the plane coupling between the transmission lines on the upper layer and the lower layer at the same time, and compared with the prior art, the orthogonal coupler has higher coupling degree.
In order to further compress the physical size of the laminated structure, the utility model can also adopt a winding inductance type layout design scheme, so that a more compact layout size is realized under the communicated equivalent electrical length. The following description will be given taking two layers of transmission lines, each layer of transmission line including two transmission lines as an example.
Fig. 4 is a perspective view of a quadrature coupler provided by the present invention, fig. 5 is a top view of fig. 4, fig. 6 is a bottom view of fig. 4, and fig. 7 is a left side view of fig. 4, as shown in fig. 4 to 7. Fig. 4 shows two coils, a first coil 114 on the left, a second coil 115 on the right, and the second coil 115 being a mirror image of the first coil 114, i.e. the first coil 114 and the second coil 115 are in a mirror image relationship.
For the first coil 114: the first and fourth transmission lines 110 and 113 positioned at an upper layer and the second and third transmission lines 111 and 112 positioned at a lower layer and corresponding to the first and fourth transmission lines 110 and 113 are respectively wound in a side-by-side manner from inside to outside to form a first coil 114 having a first predetermined shape.
Illustratively, the winding mode can be clockwise or counterclockwise. The first predetermined shape may be a polygon, a circle, or other shapes, and the first coil 114 on the left side of fig. 4 is a quadrangle.
Illustratively, the second coil 115 has a second preset shape, which may be a polygon, a circle, or another shape, and the second coil 115 on the right side of fig. 4 is a quadrangle.
Illustratively, the first coil 114 and the second coil 115 are connected by a metal via 107.
The quadrature coupler 100 shown in fig. 4 includes a first connection means 116, a second connection means 117, and a third connection means 118.
The first connection mode 116 is that the first transmission line 110, the second transmission line 111, the third transmission line 112 and the fourth transmission line 113 are respectively connected to respective metal layers 119 on the ground through metal vias 107, and the respective metal layers 119 are connected to the corresponding input terminal 101 or the corresponding quadrature output terminal 104 through the metal vias 107, that is, the second transmission line 111 and the fourth transmission line 113 are respectively connected to the input terminal 101, and the first transmission line 110 and the third transmission line 112 are respectively connected to the quadrature output terminal 104.
The second connection 117 is a connection portion of the first coil 114 and the second coil 115, and the first transmission line 110 of the first coil 114 is connected to the third transmission line 112 of the first coil and the third transmission line 112 of the second coil 115 through the metal via 107, respectively. The second transmission line 111 of the first coil 114 is connected to the second transmission line 111 of the second coil 115 through a metal via 107. The third transmission line 112 of the first coil 114 is connected to the first transmission line 110 and the third transmission line 112 of the second coil 115, respectively, through the metal vias 107. The fourth transmission line 113 of the first coil 114 is the fourth transmission line 113 of the second coil 115.
The third connection mode 118 is that the first transmission line 110, the second transmission line 111, the third transmission line 112 and the fourth transmission line 113 are respectively connected to respective metal layers 119 on the ground through metal vias 107, and the respective metal layers 119 are connected to the corresponding non-inverting output terminal 102 or the isolating terminal 103 through the metal vias 107, that is, the first transmission line 110 and the third transmission line 112 are respectively connected to the isolating terminal 103, and the second transmission line 111 and the fourth transmission line 113 are respectively connected to the non-inverting output terminal 102.
It should be noted that the transmission line subjects of the first coil 114 and the second coil 115 shown in fig. 4, 5, and 6 are in mirror image relationship, so the relationship between the first transmission line 110 and the third transmission line 112 of the first coil 114 and the second transmission line 111 and the fourth transmission line 113 of the second coil 115 are interchanged, specifically as shown by the reference numerals in fig. 5.
To better explain the first and second transmission line groups 105 and 106 in fig. 4, they are shown in fig. 8 and 9.
Fig. 8 is a schematic diagram of a first transmission line group provided by the present invention, one end of the first transmission line group 105 is connected to the input terminal 101, and the other end is connected to the in-phase output terminal 102, and the first transmission line group 105 (i.e., dark line) shown in fig. 9 includes a second transmission line 111 and a fourth transmission line 113.
Fig. 9 is a schematic diagram of a second transmission line group provided by the present invention, one end of the second transmission line group 106 is connected to the quadrature output terminal 104, and the other end is connected to the isolation terminal 103, and the second transmission line group 106 (i.e. dark line) shown in fig. 8 includes a first transmission line 110 and a third transmission line 112.
As can be seen from the above, the degree of coupling of the quadrature coupler according to the present invention is higher than that of the conventional art, but the present invention may also introduce a grid structure into the stacked coupling structure to weaken the coupling strength of the stacked coupler.
Fig. 10 is a schematic diagram of a grid structure provided by an embodiment of the present invention, as shown in fig. 10. The ground metal area is reduced by making a gap in the plane of the grounded metal layer 119. Since the larger the metal layer area of the capacitor is, the larger the equivalent capacitance thereof is, the ground capacitance is formed by the ground structure 120 by digging a slit on the ground metal layer 119 plane to form the ground structure 120, and the equivalent capacitance thereof is made smaller by reducing the ground metal area.
Illustratively, by adjusting the spacing S of the grid ground structureGSum line width WGThe degree of coupling of the quadrature coupler of the present invention can be adjusted.
In summary, the quadrature coupler of the present invention adopts a stacked structure, so that the overall size is reduced, which is beneficial to the integration in a chip (for example, the integration in a 5G millimeter wave intermediate frequency band chip), and the chip cost is saved. Because the laminated structure is adopted, the coupling mode has the side coupling of the same layer and the plane coupling of the upper layer and the lower layer, and the coupling degree is higher.
In addition, the utility model can also adopt a winding inductance type layout structure, so that the size of the orthogonal coupler can be further compact.
In addition, the coupling degree of the orthogonal coupler can be adjusted by introducing the capacitance to ground by adopting a grid ground structure.
The performance of the quadrature coupler according to the present invention will be described below with reference to fig. 11 to 13.
Fig. 11 is a schematic diagram of the amplitude and phase errors of the quadrature coupler provided by the present invention, as shown in fig. 11. The abscissa of fig. 11 represents frequency, the left side of the ordinate represents amplitude error, and the right side of the ordinate represents phase error. The two lines shown in fig. 11 represent the amplitude error and phase error performance of the quadrature coupler of the present invention at different frequency points.
Where the left is the amplitude error, i.e. the difference in amplitude between the quadrature signal and the in-phase signal, and the right is the phase error, i.e. -90 deg. the difference in phase between the quadrature signal and the in-phase signal. In an ideal case, two paths of output signals (output from an in-phase output end and output from a quadrature output end) of the quadrature coupler have equal amplitude and phase difference of 90 degrees.
As can be seen from FIG. 11, the quadrature coupler of the present invention has an amplitude error of less than 2dB and a phase error of less than 10 degrees in a 2.9-6.8GHz band (59.8% relative bandwidth).
Fig. 12 is a schematic diagram of the scattering parameters of the quadrature coupler provided by the present invention, as shown in fig. 12. The abscissa of fig. 12 represents frequency, and the ordinate represents S (scattering) parameter between transmission lines of the same layer. In fig. 12, "1" denotes an input port, "2" denotes an in-phase output port, and "3" denotes a quadrature output port. For example, S11 represents the amplitude ratio from "1" port to "1" port, i.e., the return loss of "1" port.
S21 and S31 indicate insertion loss of signals transmitted from 1 port to 2 and 3 ports, and the smaller the insertion loss, the better. S11, S22, and S33 indicate return loss of each port, and the smaller the return loss, the better. The quadrature coupler of the present invention shown in fig. 12 has return loss better than-15 dB for the input port and the two output ports in the 2-8GHz band.
Fig. 13 is a schematic diagram of the loss of the quadrature coupler provided by the present invention, as shown in fig. 13. The abscissa represents frequency and the ordinate represents loss. Fig. 13 shows the loss of a signal through the quadrature coupler according to the present invention, the curves in the figure showing the loss values for different frequencies.
In summary, the operating frequency bandwidth of the quadrature coupler is within a frequency band (59.8% relative bandwidth) of 2.9-6.8GHz, the amplitude error is less than 2dB, the phase error is less than 10 °, and the return loss performance of each port is good.
The utility model also provides a radio frequency module applied to the front end of a transceiver, wherein the radio frequency module comprises the quadrature coupler.
Illustratively, the radio frequency module may further include one or more combinations of a quadrature mixer, a balanced amplifier, and a power amplifier.
The application of the quadrature coupler according to the present invention to a quadrature mixer, a balanced amplifier, and a power amplifier will be described below with reference to fig. 14 to 17.
Fig. 14 is a schematic diagram of down-conversion of the present invention applied to a quadrature mixer, and fig. 15 is a schematic diagram of up-conversion of the present invention applied to a quadrature mixer, as shown in fig. 14 and fig. 15. IF represents Intermediate Frequency (IF), RF represents Radio Frequency (RF), and LO represents Local Oscillator Frequency (LO). LO, RF, IF are the three ports of the quadrature mixer. The IF may be the difference between RF and LO (down conversion) or the sum of RF and LO (up conversion).
In the quadrature mixing circuit, the quadrature coupler can be used for generating or synthesizing intermediate frequency and local oscillation quadrature signals.
Fig. 16 is a schematic diagram of the present invention applied to a balanced amplifier, and fig. 17 is a schematic diagram of the present invention applied to a power amplifier, as shown in fig. 16 and 17. In an amplifier circuit, the quadrature coupler of the present invention can be used for generation of an input quadrature signal or synthesis of an output quadrature signal.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A quadrature coupler having an input, an in-phase output, an isolated terminal, and a quadrature output, comprising:
one end of the first transmission line group is connected with the input end, and the other end of the first transmission line group is connected with the in-phase output end;
one end of the second transmission line group is connected with the orthogonal output end, and the other end of the second transmission line group is connected with the isolation end;
the first transmission line group and the second transmission line group are both formed by at least two layers of transmission lines, each layer of transmission line comprises at least two transmission lines, the at least two layers of transmission lines form a laminated structure, and the coupling of the laminated structure comprises side coupling between the transmission lines on the same layer and plane coupling between the transmission lines on the upper layer and the lower layer.
2. The quadrature coupler of claim 1 wherein said at least two layers of transmission lines include a first layer of transmission lines including a first transmission line and a fourth transmission line and a second layer of transmission lines including a second transmission line and a third transmission line corresponding to said first transmission line and said fourth transmission line, said first transmission line providing planar coupling with said second transmission line and said first transmission line providing side coupling with said fourth transmission line.
3. The quadrature coupler of claim 2 wherein said first set of transmission lines includes a second transmission line and a fourth transmission line, and said second set of transmission lines includes a first transmission line and a third transmission line.
4. The quadrature coupler of claim 2 wherein said first and fourth transmission lines at an upper level and said second and third transmission lines at a lower level and corresponding to said first and fourth transmission lines are each wound in a side-by-side manner from inside to outside to form a first coil having a first predetermined shape.
5. The quadrature coupler of claim 4 further comprising a second coil having a second predetermined shape, wherein the first coil is connected to the second coil through a metal via, the first predetermined shape is the same as or different from the second predetermined shape, and the second coil is a mirror image of the first coil.
6. The quadrature coupler of claim 5 wherein said first predetermined shape or said second predetermined shape is a polygon or a circle.
7. The quadrature coupler of claim 1 wherein said quadrature coupler is located on a grounded metal layer, said quadrature coupler further comprising a grounded capacitance formed by a grid ground structure of said grounded metal layer, gaps and line widths of said grid ground structure being used to adjust a degree of coupling of said quadrature coupler.
8. The quadrature coupler of claim 2 wherein the widths of the first, second, third and fourth transmission lines are the same or different; the lengths of the first transmission line, the second transmission line, the third transmission line and the fourth transmission line are the same.
9. The quadrature coupler of claim 1 wherein said isolated terminal is grounded by connecting a predetermined resistor in series.
10. A radio frequency module for use in a front-end of a transceiver, wherein the radio frequency module comprises a quadrature coupler as claimed in any one of claims 1 to 9.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115603021A (en) * | 2022-11-25 | 2023-01-13 | 南京迈矽科微电子科技有限公司（Cn） | Directional coupler and microwave device |
| CN118380746A (en) * | 2024-06-25 | 2024-07-23 | 深圳飞骧科技股份有限公司 | Bidirectional coupler and radio frequency module |
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2022
- 2022-02-21 CN CN202220351564.XU patent/CN216903297U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115603021A (en) * | 2022-11-25 | 2023-01-13 | 南京迈矽科微电子科技有限公司（Cn） | Directional coupler and microwave device |
| CN118380746A (en) * | 2024-06-25 | 2024-07-23 | 深圳飞骧科技股份有限公司 | Bidirectional coupler and radio frequency module |
| CN118380746B (en) * | 2024-06-25 | 2024-09-13 | 深圳飞骧科技股份有限公司 | Bidirectional coupler and radio frequency module |
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