Radio frequency power amplifier and radio frequency front end module

Abstract

The application discloses a radio frequency power amplifier, which comprises a radio frequency amplification unit and a first transformer. The primary line and the secondary line of the first transformer are arranged following each other, the distance between the first end of the first winding and the first end of the second winding is smaller than the distance between the first end of the first winding and the second end of the first winding, and the distance between the second end of the first winding and the second end of the second winding is smaller than the distance between the first end of the second winding and the second end of the second winding. Therefore, the flexible setting of the first transformer layout can be realized, and the loss and the occupied area can be further reduced under the condition of ensuring the overall performance of the radio frequency power amplifier.

Description

Technical Field

[0001] This invention relates to the field of radio frequency technology, and in particular to a radio frequency power amplifier and a radio frequency front-end module. Background Technology

[0002] Radio frequency (RF) power amplifiers are widely used in mobile terminals. Transformers, as a crucial component of RF power amplifiers, perform signal conversion and impedance matching. However, in RF power amplifier design, transformers often occupy a large area and their placement is very constrained, resulting in suboptimal overall performance and failure to meet practical requirements. Summary of the Invention

[0003] This invention provides a radio frequency power amplifier and a radio frequency power amplifier that solves the problem that radio frequency power amplifiers cannot simultaneously balance area and performance.

[0004] A radio frequency (RF) power amplifier includes an RF amplification unit; a first transformer connected to the RF amplification unit; the first transformer includes a first winding and a second winding coupled to each other, the first winding including a main wire connected between a first end and a second end of the first winding; the second winding including a secondary wire connected between a first end and a second end of the second winding, the main wire and the secondary wire being arranged sequentially; the distance between the first end of the first winding and the first end of the second winding is less than a first value, the first value being the distance between the first end of the first winding and the second end of the first winding; the distance between the second end of the first winding and the second end of the second winding is less than a second value, the second value being the distance between the first end of the second winding and the second end of the second winding.

[0005] Furthermore, the distance between the first end of the first winding and the first end of the second winding is less than twice the line width of the main line or the secondary line;

[0006] The distance between the second end of the first winding and the second end of the second winding is less than twice the line width of the main line or the secondary line.

[0007] Furthermore, the distance between the first end of the first winding and the first end of the second winding is less than or equal to the line width of the main line or the secondary line;

[0008] The distance between the second end of the first winding and the second end of the second winding is less than or equal to the line width of the main line or the secondary line.

[0009] Furthermore, the radio frequency amplification unit includes a first amplification transistor, a first end of the first winding is connected to the first amplification transistor, and a second end of the first winding is configured to be connected to a ground terminal or a power supply terminal.

[0010] Furthermore, the radio frequency amplification unit includes a first amplifying transistor and a second amplifying transistor, with a first end of the first winding connected to the first amplifying transistor and a second end of the first winding connected to the second amplifying transistor.

[0011] Furthermore, the first end of the first winding and the first end of the second winding are disposed near the radio frequency amplification unit, and the second end of the first winding and the second end of the second winding are disposed away from the radio frequency amplification unit relative to the first end of the first winding and the first end of the second winding.

[0012] Furthermore, the first end of the second winding is connected to the signal transmission end, and the second end of the second winding is grounded; or, the second end of the second winding is connected to the signal transmission end, and the first end of the second winding is grounded.

[0013] Furthermore, the distance between the first end of the first winding and the first end of the second winding is in the range of [2um, 40um], and the distance between the second end of the first winding and the second end of the second winding is in the range of [2um, 40um].

[0014] Furthermore, the first transformer is disposed on the chip; the distance between the first end of the first winding and the first end of the second winding is in the range of [2um, 15um]; the distance between the second end of the first winding and the second end of the second winding is in the range of [2um, 15um].

[0015] The first transformer is mounted on a substrate; the distance between the first end of the first winding and the first end of the second winding is in the range of [10um, 40um]; the distance between the second end of the first winding and the second end of the second winding is in the range of [10um, 40um].

[0016] Furthermore, the distance between the first end of the first winding and the first end of the second winding is less than half of the first value, and the distance between the second end of the first winding and the second end of the second winding is less than half of the second value.

[0017] Furthermore, the first winding includes a first main conductor and a second main conductor connected in parallel, and the second winding includes a first main conductor, which is disposed between the first main conductor and the second main conductor.

[0018] Wherein, the difference between the length of the first primary line and the length of the first secondary line is equal to the difference between the length of the first secondary line and the length of the second primary line, or the lengths of the first primary line and the second primary line are equal.

[0019] Furthermore, the second winding includes a first-stage line and a second-stage line connected in parallel, and the first winding includes a first-main-stage line disposed between the first-stage line and the second-stage line;

[0020] Wherein, the difference between the length of the first-level line and the length of the first main-level line is equal to the difference between the length of the first main-level line and the length of the second-level line, or the length of the first-level line is equal to the length of the second-level line.

[0021] Furthermore, the length difference between the main line and the secondary line is a first difference value, wherein the first difference value is less than or equal to 20 percent of the length of the main line or the secondary line.

[0022] Furthermore, the extension direction of the main wire from the first end to the second end of the first winding is the same as the extension direction of the secondary wire from the first end to the second end of the second winding.

[0023] Furthermore, both the main line and the secondary line are arranged in a straight line.

[0024] Furthermore, both the main line and the secondary line are arranged in an arc shape.

[0025] Furthermore, the central angle of the arc of the main line and the secondary line is greater than or equal to 90 degrees.

[0026] Furthermore, the first winding includes N first connecting segments connected in series, and the second winding includes M second connecting segments connected in series; the angle between two adjacent first connecting segments is greater than or equal to 90°, the angle between two adjacent second connecting segments is greater than or equal to 90°, and N is a positive integer greater than or equal to 2.

[0027] Furthermore, the first winding includes two first connecting segments connected in series, with an angle of 90 degrees between the two first connecting segments, and / or the second winding includes two second connecting segments connected in series, with an angle of 90 degrees between the two second connecting segments.

[0028] Furthermore, the first winding includes three first connecting segments connected in series, with an angle of 90 degrees between two adjacent first connecting segments; the second winding includes three second connecting segments connected in series, with an angle of 90 degrees between two adjacent second connecting segments.

[0029] Furthermore, the ratio of the line width of the first winding to the line width of the second winding is in the range of [1:2 to 2:1], or the ratio of the inductance of the first winding to the inductance of the second winding is in the range of [1:2 to 2:1].

[0030] Furthermore, the main line and the secondary line are coupled at the same layer, or the main line and the secondary line are coupled at different layers.

[0031] Furthermore, the first main conductor includes a first main conductor segment and a second main conductor segment. The first main conductor segment is connected to a first end of the first winding, and the second main conductor segment is connected to a second end of the first winding. The second main conductor includes a third main conductor segment and a fourth main conductor segment. The third main conductor segment is connected to a first end of the first winding, and the fourth main conductor segment is connected to a second end of the first winding. The first main conductor segment is connected to the fourth main conductor segment via a first jumper, and the third main conductor segment is connected to the second main conductor segment via a second jumper.

[0032] Furthermore, the first-level line includes a first-level line segment and a second-level line segment. The first-level line segment is connected to the first end of the second winding, and the second-level line segment is connected to the second end of the second winding. The second-level line includes a third-level line segment and a fourth-level line segment. The third-level line segment is connected to the first end of the second winding, and the fourth-level line segment is connected to the second end of the second winding. The first-level line segment is connected to the fourth-level line segment via a third jumper, and the third-level line segment is connected to the second-level line segment via a fourth jumper.

[0033] Furthermore, the first primary line segment includes a first primary line segment portion and a second primary line segment portion connected in series, the angle between the first primary line segment portion and the second primary line segment portion is a first angle, the second primary line segment includes a third primary line segment portion and a fourth primary line segment portion connected in series, the third primary line segment portion and the second primary line segment portion are on the same virtual straight line, the angle between the third primary line segment portion and the fourth primary line segment portion is a second angle.

[0034] Furthermore, the first-level line segment includes a first line segment portion and a second line segment portion connected in series, and the angle between the first line segment portion and the second line segment portion is a third angle. The second-level line segment includes a third line segment portion and a fourth line segment portion connected in series, and the third line segment portion and the second line segment portion are on the same virtual straight line, and the angle between the third line segment portion and the fourth line segment portion is a fourth angle.

[0035] Furthermore, the impedance at the input terminal of the first transformer is greater than the impedance at the output terminal of the first transformer, and the line width of the first winding is smaller than the line width of the second winding.

[0036] The impedance at the input terminal of the first transformer is less than the impedance at the output terminal of the first transformer, and the line width of the first winding is greater than the line width of the second winding.

[0037] A radio frequency (RF) front-end module includes: a substrate, a first chip disposed on the substrate, and a first transformer disposed on the substrate. The first chip includes a first amplifying transistor. The first transformer includes a first winding and a second winding coupled to each other. A first end of the first winding is connected to the first amplifying transistor, and a second end of the first winding is configured to be connected to a ground terminal or a power supply terminal. The first winding includes a main wire connected between the first end and the second end of the first winding. The second winding includes a secondary wire connected between the first end and the second end of the second winding. The main wire and the secondary wire are arranged sequentially. The distance between the first end of the first winding and the first end of the second winding is less than a first value, where the first value is the distance between the first end and the second end of the first winding. The distance between the second end of the first winding and the second end of the second winding is less than a second value, where the second value is the distance between the first end and the second end of the second winding.

[0038] Furthermore, the first end of the second winding is connected to the grounding end, and the second end of the second winding is connected to the signal transmission end.

[0039] Furthermore, the first end of the second winding is connected to the ground terminal on the first chip.

[0040] Furthermore, the first chip also includes a first capacitor, and the first end of the second winding is connected to the ground terminal of the first chip through the first capacitor.

[0041] Furthermore, the signal transmission end is configured to be connected to the first element, and the second end of the first winding and the second end of the second winding are both disposed in the area between the first chip and the first element.

[0042] Furthermore, the second end of the first winding and the second end of the second winding are disposed adjacent to the first element.

[0043] Furthermore, the first end of the first winding is disposed close to the first chip, and the second end of the first winding is disposed away from the first chip relative to the first end of the first winding;

[0044] The first end of the second winding is positioned close to the first chip, and the second end of the second winding is positioned away from the first chip relative to the first end of the second winding.

[0045] Furthermore, the distance between the first end of the first winding and the first end of the second winding is in the range of [10um, 40um]; the distance between the second end of the first winding and the second end of the second winding is in the range of [10um, 40um].

[0046] A radio frequency front-end module includes a substrate and a first chip disposed on the substrate. The first chip includes a first amplifying transistor and a first transformer. The first transformer includes a first winding and a second winding coupled to each other. A first end of the first winding is connected to the first amplifying transistor, and a second end of the first winding is configured to be connected to a ground terminal or a power supply terminal. The first winding includes a main wire connected between the first end and the second end of the first winding. The second winding includes a secondary wire connected between the first end and the second end of the second winding. The main wire and the secondary wire are arranged sequentially. The distance between the first end of the first winding and the first end of the second winding is less than a first value, where the first value is the distance between the first end and the second end of the first winding. The distance between the second end of the first winding and the second end of the second winding is less than a second value, where the second value is the distance between the first end and the second end of the second winding.

[0047] A radio frequency (RF) front-end module includes a substrate, a first transformer, and a first chip disposed on the substrate. The first chip includes a first amplifying transistor. The first transformer includes a first winding and a second winding coupled to each other. A first end of the first winding is connected to the first amplifying transistor, and a second end of the first winding is configured to be connected to a ground terminal or a power supply terminal. The first winding includes a main line connected between the first end and the second end of the first winding. The second winding includes a secondary line connected between the first end and the second end of the second winding. The main line and the secondary line are arranged sequentially. A portion of the main line segment is disposed on the first chip, and another portion of the main line segment is disposed on the substrate. A portion of the secondary line segment is disposed on the first chip, and another portion of the secondary line segment is disposed on the substrate. The distance between the first end of the first winding and the first end of the second winding is less than a first value, where the first value is the distance between the first end and the second end of the first winding. The distance between the second end of the first winding and the second end of the second winding is less than a second value, where the second value is the distance between the first end and the second end of the second winding.

[0048] In this embodiment, the radio frequency power amplifier includes a radio frequency amplification unit; a first transformer connected to the radio frequency amplification unit; the first transformer includes a first winding and a second winding coupled to each other; the first winding includes a main wire connected between a first end and a second end of the first winding; the second winding includes a secondary wire connected between a first end and a second end of the second winding, the main wire and the secondary wire being arranged sequentially; the distance between the first end of the first winding and the first end of the second winding is less than a first value, the first value being the distance between the first end of the first winding and the second end of the first winding, and the distance between the second end of the first winding and the second end of the second winding is less than a first value. The distance between the second ends of the second winding is less than a second value, where the second value is the distance between the first end of the second winding and the second end of the second winding. By making the main line and the secondary line follow each other, and the distance between the first end of the first winding and the first end of the second winding is less than the distance between the first end of the first winding and the second end of the first winding, and the distance between the second end of the first winding and the second end of the second winding is less than the distance between the first end of the second winding and the second end of the second winding, the layout of the first transformer can be flexibly configured while ensuring the overall performance of the RF power amplifier, and losses and occupied area can be further reduced. Attached Figure Description

[0049] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 This is a schematic diagram of a radio frequency power amplifier in one embodiment of the present invention;

[0051] Figure 2 This is another structural schematic diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0052] Figure 3 This is another circuit diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0053] Figure 4 This is another circuit diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0054] Figure 5 This is another circuit diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0055] Figure 6 This is another circuit diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0056] Figure 7 This is another circuit diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0057] Figure 8 This is another circuit diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0058] Figure 9 This is another circuit diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0059] Figure 10 This is another circuit diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0060] Figure 11 This is another circuit diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0061] Figure 12 This is another circuit diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0062] Figure 13 This is another circuit diagram of the radio frequency power amplifier in one embodiment of the present invention;

[0063] Figure 14This is another circuit diagram of the radio frequency front-end module in one embodiment of the present invention;

[0064] Figure 15 This is another circuit diagram of the radio frequency front-end module in one embodiment of the present invention;

[0065] Figure 16 This is another circuit diagram of the radio frequency front-end module in one embodiment of the present invention;

[0066] Figure 17 This is another circuit diagram of the radio frequency front-end module in one embodiment of the present invention;

[0067] In the figure, 10 is the first amplifying transistor; 20 is the second amplifying transistor; 11 is the first winding; 12 is the second winding; 100 is the first chip; 200 is the substrate; and C1 is the first capacitor. Detailed Implementation

[0068] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] It should be understood that the invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, for clarity, the dimensions and relative dimensions of layers and regions may be exaggerated. The same reference numerals denote the same elements throughout.

[0070] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this invention, the first element, component, area, layer, or portion discussed below may be referred to as the second element, component, area, layer, or portion.

[0071] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.

[0072] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. When used herein, the singular forms “a,” “an,” and “ / the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “comprising,” when used in this specification, identify the presence of features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0073] To fully understand this invention, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by this invention. Preferred embodiments of the invention are described in detail below; however, in addition to these detailed descriptions, the invention may have other embodiments.

[0074] This embodiment provides a radio frequency (RF) power amplifier, which is an amplifier used to amplify low-power signals in the transmission path of an RF front-end module. The RF front-end module also includes two or more discrete components such as RF switches, low-noise amplifiers, filters, and duplexers. Specifically, the RF front-end module can be applied to communication devices such as smartphones, tablets, and smartwatches.

[0075] A radio frequency power amplifier, such as Figure 1As shown, it includes a radio frequency (RF) amplification unit; a first transformer connected to the RF amplification unit; the first transformer includes a first winding 11 and a second winding 12 coupled to each other, the first winding including a main wire connected between a first end of the first winding 11 and a second end of the first winding; the second winding 12 including a secondary wire connected between a first end of the second winding and a second end of the second winding, the main wire and the secondary wire being arranged sequentially; the distance between the first end of the first winding and the first end of the second winding is less than a first value, the first value being the distance between the first end of the first winding and the second end of the first winding; the distance between the second end of the first winding and the second end of the second winding is less than a second value, the second value being the distance between the first end of the second winding and the second end of the second winding.

[0076] The radio frequency (RF) amplification unit can be an amplification unit composed of at least one power amplification transistor. For example, the power amplification transistor can be any type of transistor such as a bipolar junction transistor (BJT) or a metal-oxide-semiconductor field-effect transistor (MOSFET). The RF amplification unit can be any type of amplification unit such as a single-ended amplification unit, a differential amplification unit, a Dougherty power amplification unit, or a balanced power amplification unit.

[0077] In at least one embodiment, the first transformer is connected to the input terminal of the radio frequency amplification unit, and the first transformer is an input stage transformer of the radio frequency power amplifier. Alternatively, the first transformer is connected to the output terminal of the radio frequency amplification unit, and the first transformer is an output stage transformer of the radio frequency power amplifier.

[0078] In at least one embodiment, the main wire of the first winding 11 and the secondary wire of the second winding 12 are arranged to follow each other, that is, the extension direction of the main wire from the first end to the second end of the first winding and the extension direction of the secondary wire from the first end to the second end of the second winding are the same. The extension direction can be any angle and shape. For example, if the main wire of the first winding 11 is straight, then the secondary wire of the second winding 12 is also straight. Or, if the main wire of the first winding 11 is L-shaped, then the secondary wire of the second winding 12 is also L-shaped. Or, if the main wire of the first winding 11 is arc-shaped, then the secondary wire of the second winding 12 is also arc-shaped. It should be noted that this embodiment does not specifically limit the shape of the main wire of the first winding 11 and the secondary wire of the second winding 12, as long as the main wire and the secondary wire are arranged to follow each other.

[0079] In at least one embodiment, the distance between the first end of the first winding 11 and the first end of the second winding 12 is less than a first value, the first value being the distance between the first end of the first winding 11 and the second end of the first winding 11, and the distance between the second end of the first winding 11 and the second end of the second winding 12 is less than a second value, the second value being the distance between the first end of the second winding 12 and the second end of the second winding.

[0080] Wherein, the first value is the straight-line distance between the first end and the second end of the first winding 11, and the second value is the straight-line distance between the first end and the second end of the second winding 12. As an example, when the main wire of the first winding 11 is arranged in a straight line, the distance between the first end and the second end of the first winding 11 is equal to the length of the main wire. Similarly, when the secondary wire of the first winding 12 is arranged in a straight line, the distance between the first end and the second end of the second winding 12 is equal to the length of the secondary wire.

[0081] In at least one embodiment, since the main line and the secondary line are arranged to follow each other, the first end of the first winding is adjacent to the first end of the second winding, and the second end of the first winding is adjacent to the second end of the second winding. Specifically, in this embodiment, the distance between the first end of the first winding and the first end of the second winding is less than the distance between the first end of the first winding and the second end of the first winding, and the distance between the second end of the first winding and the second end of the second winding is less than the distance between the first end of the second winding and the second end of the second winding. This embodiment, while ensuring the coupling degree between the main line of the first winding and the secondary line of the second winding, allows for flexible setting of the positions of the two ports of the first winding and the two ports of the second winding. Furthermore, since the radii of the first winding and the second winding are infinitely large under this implementation, the Q value (quality factor) of the first transformer can be improved. In addition, since the main line and the secondary line are arranged to follow each other, no additional jumpers are introduced, resulting in lower losses and a smaller footprint.

[0082] In this embodiment, the radio frequency power amplifier includes a radio frequency amplification unit; a first transformer connected to the radio frequency amplification unit; the first transformer includes a first winding and a second winding coupled to each other; the first winding includes a main wire connected between a first end and a second end of the first winding; the second winding includes a secondary wire connected between a first end and a second end of the second winding, the main wire and the secondary wire being arranged sequentially; the distance between the first end of the first winding and the first end of the second winding is less than a first value, the first value being the distance between the first end of the first winding and the second end of the first winding, and the distance between the second end of the first winding and the second end of the second winding is less than a first value. The distance between the second ends of the second winding is less than a second value, where the second value is the distance between the first end of the second winding and the second end of the second winding. By making the main line and the secondary line follow each other, and the distance between the first end of the first winding and the first end of the second winding is less than the distance between the first end of the first winding and the second end of the first winding, and the distance between the second end of the first winding and the second end of the second winding is less than the distance between the first end of the second winding and the second end of the second winding, the layout of the first transformer can be flexibly configured while ensuring the overall performance of the RF power amplifier, and losses and occupied area can be further reduced.

[0083] In one specific embodiment, the distance between the first end of the first winding and the first end of the second winding is less than twice the line width of the main line or the secondary line; the distance between the second end of the first winding and the second end of the second winding is less than twice the line width of the main line or the secondary line.

[0084] For reference Figure 4 As shown, the distance between the first end of the first winding and the first end of the second winding is less than twice the line width X1 of the main wire. Alternatively, the distance between the first end of the first winding and the first end of the second winding is less than twice the line width X2 of the secondary wire. Similarly, the distance between the second end of the first winding and the second end of the second winding is less than twice the line width X1 of the main wire, or the distance between the second end of the first winding and the second end of the second winding is less than twice the line width X2 of the secondary wire. The line width X1 of the main wire and the line width X2 of the secondary wire can be the same or different.

[0085] In at least one embodiment, if the line width X1 of the primary wire is less than the line width X2 of the secondary wire, then the distance between the first end of the first winding and the first end of the second winding is less than the line width X1 of the primary wire. Similarly, if the line width X1 of the primary wire is less than the line width X2 of the secondary wire, then the distance between the second end of the first winding and the first end of the second winding is less than the line width X2 of the secondary wire. Likewise, if the line width X1 of the primary wire is less than the line width X2 of the secondary wire, then the distance between the second end of the first winding and the second end of the second winding is less than the line width X1 of the primary wire. And if the line width X2 of the secondary wire is less than the line width X2 of the primary wire, then the distance between the second end of the first winding and the second end of the second winding is less than the line width X2 of the secondary wire.

[0086] This embodiment allows for flexible layout of the first transformer by having the main line and the secondary line follow each other, and by limiting the distance between the first end of the first winding and the first end of the second winding to be less than twice the line width of the main line or the secondary line; the distance between the second end of the first winding and the second end of the second winding to be less than twice the line width of the main line or the secondary line; thereby not only can flexible layout of the first transformer be achieved, but losses and occupied area can also be further reduced.

[0087] In one specific embodiment, the distance between the first end of the first winding and the first end of the second winding is greater than or equal to half the line width of the main line or the secondary line, and less than or equal to the line width of the main line or the secondary line; the distance between the second end of the first winding and the second end of the second winding is greater than or equal to half the line width of the main line or the secondary line, and less than or equal to the line width of the main line or the secondary line.

[0088] For reference Figure 4 As shown, the distance between the first end of the first winding and the first end of the second winding is greater than or equal to half the line width X1 of the main wire, and less than or equal to the line width X1 of the main wire. Alternatively, the distance between the first end of the first winding and the first end of the second winding is greater than or equal to half the line width X2 of the secondary wire, and less than or equal to the line width X2 of the secondary wire. Similarly, the distance between the second end of the first winding and the second end of the second winding is greater than or equal to half the line width X1 of the main wire, and less than or equal to the line width X1 of the main wire. Alternatively, the distance between the second end of the first winding and the second end of the second winding is greater than or equal to half the line width X2 of the secondary wire, and less than or equal to the line width X2 of the secondary wire.

[0089] This embodiment allows for flexible layout of the first transformer by having the main line and the secondary line follow each other, and by limiting the distance between the first end of the first winding and the first end of the second winding to be greater than or equal to half the line width of the main line or the secondary line, and less than or equal to the line width of the main line or the secondary line; the distance between the second end of the first winding and the second end of the second winding to be greater than or equal to half the line width of the main line or the secondary line, and less than or equal to the line width of the main line or the secondary line; thereby not only can flexible layout of the first transformer be achieved, but losses and occupied area can also be further reduced.

[0090] In one specific embodiment, the radio frequency amplification unit includes a first amplification transistor, a first end of the first winding is connected to the first amplification transistor, and a second end of the first winding is configured to be connected to a ground terminal or a power supply terminal.

[0091] In at least one embodiment, a first end of the first winding is connected to the input terminal of the first amplifying transistor, and the first transformer is an input stage transformer of an RF power amplifier. Alternatively, a first end of the first winding is connected to the output terminal of the first amplifying transistor, and the first transformer is an output stage transformer of an RF power amplifier.

[0092] In at least one embodiment, the second end of the first winding is configured to be connected to the ground terminal, and other passive components (e.g., capacitors) can be connected along the path between the first amplifying transistor and the second end of the first winding to participate in impedance matching together with the first transformer, thereby improving the flexibility of impedance transformation of the RF power amplifier.

[0093] In at least one embodiment, the second end of the first winding is configured to be connected to a power supply terminal. The power supply voltage of the power supply terminal is transmitted to the first amplifying transistor through the first winding to power the first amplifying transistor and ensure its normal operation. By utilizing the first winding to transmit the power supply voltage from the power supply terminal to the first amplifying transistor, the RF power amplifier eliminates the need for an additional power supply inductor connected to the power supply terminal, thereby reducing the number of components and the overall footprint.

[0094] In one specific embodiment, reference is made to the following Figure 2 As shown, the amplification unit includes a first amplification transistor 10 and a second amplification transistor 20. The first end of the first winding is connected to the first amplification transistor, and the second end of the first winding is connected to the second amplification transistor.

[0095] In at least one embodiment, the first amplifying transistor 10 and the second amplifying transistor 20 form a differential amplifier circuit, wherein the phase of the first radio frequency signal RFIN1 input to the input terminal of the first amplifying transistor and the phase of the second radio frequency signal RFIN2 input to the input terminal of the second amplifying transistor differ by 180 degrees. Optionally, the first radio frequency signal and the second radio frequency signal can be two differential signals converted from a single radio frequency input signal by a power divider, or they can be two differential signals amplified by two different pre-amplifier stages.

[0096] In at least one implementation, the first amplifying transistor 10 can be a bipolar junction transistor (BJT) or a field-effect transistor (FET), etc. The second amplifying transistor 20 can also be a BJT or a FET, etc. In at least one implementation, both the first amplifying transistor 10 and the second amplifying transistor 20 are heterojunction transistors (HBTs). For example, the first amplifying transistor 10 is a heterojunction transistor fabricated using GaAs technology, and both the first and second amplifying transistors 20 are heterojunction transistors fabricated using GaAs technology. In at least one implementation, both the first amplifying transistor 10 and the second amplifying transistor 20 are NPN transistors.

[0097] Understandably, the differential amplifier circuit composed of the first amplifying transistor 10 and the second amplifying transistor 20 can be any amplification stage in the radio frequency power amplifier. For example, when the radio frequency power amplifier includes a driver stage and an output stage, the differential power amplifier unit in this embodiment can be any amplification stage (i.e., driver stage or output stage) in the radio frequency power amplifier.

[0098] In one specific embodiment, the first end of the first winding and the first end of the second winding are disposed adjacent to the amplification unit, and the second end of the first winding and the second end of the second winding are disposed away from the radio frequency amplification unit relative to the first end of the first winding and the first end of the second winding.

[0099] In at least one embodiment, the first end of the first winding and the first end of the second winding are disposed adjacent to the amplification unit, and the radio frequency amplification unit is disposed to the left of the first end of the first winding and the first end of the second winding. The second end of the first winding and the second end of the second winding may be disposed to the right of the first end of the first winding and the first end of the second winding, or the second end of the first winding and the second end of the second winding may be disposed in a region to the upper right, lower right, or directly right of the first end of the first winding and the first end of the second winding. The second end of the first winding and the second end of the second winding may be disposed in the same region to the upper right, lower right, or directly right, or they may be disposed in different regions. It is understood that the right side mentioned in this embodiment refers to the right side relative to the first radio frequency amplification chip and / or the first end of the first winding and the first end of the second winding.

[0100] In one specific embodiment, the first end of the second winding is connected to the signal transmission end, and the second end of the second winding is grounded; or, the second end of the second winding is connected to the signal transmission end, and the first end of the second winding is grounded. The signal transmission end can be a signal input end or a signal output end.

[0101] In at least one embodiment, the signal transmission terminal is used to connect to a subsequent circuit / component. Since the first end of the second winding is located close to the first end of the first winding, when the subsequent circuit / component is located close to the first amplifying transistor, the first end of the second winding is connected to the signal transmission terminal, and the second end of the second winding is grounded. When the other components are located far from the first amplifying transistor, the second end of the second winding is connected to the signal transmission terminal, and the first end of the second winding is grounded. The first and second ends of the second winding can be flexibly adjusted and positioned according to the location of the subsequent circuit / component. This ensures that the first end of the second winding is located close to the first end of the first winding while avoiding excessive insertion loss due to excessively long connection lines between the first end of the second winding and the subsequent circuit / component, thereby reducing the overall loss of the RF power amplifier.

[0102] In one specific embodiment, the distance between the first end of the first winding and the first end of the second winding is in the range of [2um, 40um], and the distance between the second end of the first winding and the second end of the second winding is in the range of [2um, 40um].

[0103] In at least one embodiment, since the coupling degree between the main line and the secondary line is related to the coupling distance between them, in order to ensure both the mutual following arrangement of the main line and the secondary line and the coupling degree between them, the distance between the first end of the first winding and the first end of the second winding, as well as the distance between the second end of the first winding and the second end of the second winding, cannot be too large. In this embodiment, the distance between the first end of the first winding and the first end of the second winding ranges from [2µm, 40µm], and the distance between the second end of the first winding and the second end of the second winding ranges from [2µm, 40µm]. For example, the distance between the first end of the first winding and the first end of the second winding is 5µm, 10µm, 20µm, 30µm, etc. The distance between the second end of the first winding and the second end of the second winding is 5µm, 10µm, 20µm, 30µm, etc.

[0104] It should be noted that the distance between the first end of the first winding and the first end of the second winding can be the same as or different from the distance between the second end of the first winding and the second end of the second winding.

[0105] In this embodiment, the distance between the first end of the first winding and the first end of the second winding is in the range of [2um, 40um], and the distance between the second end of the first winding and the second end of the second winding is in the range of [2um, 40um]; thus, while realizing the flexible setting of the transformer layout, the coupling degree between the first winding and the second winding can also be improved.

[0106] In one specific embodiment, the first transformer is disposed on the chip; the distance between the first end of the first winding and the first end of the second winding ranges from [2µm, 15µm]; the distance between the second end of the first winding and the second end of the second winding ranges from [2µm, 15µm]. For example, the distance between the first end of the first winding and the first end of the second winding is 5µm, 8µm, 12µm, 14µm, etc. The distance between the second end of the first winding and the second end of the second winding is 5µm, 8µm, 12µm, 14µm, etc.

[0107] In at least one embodiment, since the area on the chip is relatively limited, when the first transformer is disposed on the chip, by making the distance between the first end of the first winding and the first end of the second winding range [2um, 15um], and the distance between the second end of the first winding and the second end of the second winding range [2um, 15um], not only can the layout of the first transformer be flexibly configured, but the area occupied by the first transformer can also be reduced.

[0108] In one specific embodiment, the first transformer is disposed on a substrate; the distance between the first end of the first winding and the first end of the second winding is in the range of [10um, 40um]; the distance between the second end of the first winding and the second end of the second winding is in the range of [10um, 40um].

[0109] In at least one embodiment, since the available area on the substrate is large, when the first transformer is disposed on the substrate, the flexibility of the layout of the first transformer can be further improved by making the distance between the first end of the first winding and the first end of the second winding range [10um, 40um] and the distance between the second end of the first winding and the second end of the second winding range [10um, 40um].

[0110] In one specific embodiment, the distance between the first end of the first winding 11 and the first end of the second winding 12 is less than half of the first value, and the distance between the second end of the first winding 11 and the second end of the second winding 12 is less than half of the second value.

[0111] In at least one embodiment, in order to ensure the coupling degree between the first winding 11 and the second winding, the distance between the first end of the first winding 11 and the first end of the second winding 12 cannot be too large, and the distance between the second end of the first winding 11 and the second end of the second winding 12 cannot be too large. This embodiment limits the distance between the first end of the first winding 11 and the first end of the second winding 12 to less than half of the first value, and the distance between the second end of the first winding 11 and the second end of the second winding 12 to less than half of the second value. The first value is the distance between the first end of the first winding and the second end of the first winding, and the second value is the distance between the first end of the second winding and the second end of the second winding. In this way, while ensuring the coupling degree between the first winding and the second winding, the quality factor (Q value) of the first transformer can also be improved, thereby reducing the overall loss of the RF power amplifier.

[0112] In one specific embodiment, the first winding includes a first primary line and a second primary line connected in parallel, and the second winding includes a first primary line disposed between the first primary line and the second primary line.

[0113] In at least one embodiment, refer to the following Figure 5 As shown, by dividing the first winding into a first main line and a second main line connected in parallel, and setting the first main line between the first main line and the second main line, the turns ratio between the first winding and the second winding can be flexibly adjusted while ensuring the coupling degree between the first winding and the second winding.

[0114] Understandably, the first winding includes, but is not limited to, a first primary winding and a second primary winding connected in parallel, and the second winding includes, but is not limited to, a first secondary winding; the first winding may also include a third primary winding and a fourth primary winding, etc. The second winding may also include a second secondary winding and a third secondary winding, etc. The more primary windings connected in parallel that the first winding includes, the smaller the equivalent inductance of the first winding. The more secondary windings connected in parallel that the second winding includes, the smaller the equivalent inductance of the second winding. The number of primary windings connected in parallel that the first winding includes, and the number of secondary windings connected in parallel that the second winding includes, can be set according to actual conditions. In this embodiment, in order to ensure the coupling degree between the first winding and the second winding, the primary windings connected in parallel that the first winding includes and the secondary windings connected in parallel that the second winding includes are spaced apart.

[0115] Wherein, the difference between the length of the first primary line and the length of the first secondary line is equal to the difference between the length of the first secondary line and the length of the second primary line, or the lengths of the first primary line and the second primary line are equal.

[0116] In at least one embodiment, since the first primary winding is positioned between the first primary winding and the second primary winding, when the first primary winding, the second primary winding, and the first primary winding are arranged in a straight line, the lengths of the first primary winding, the second primary winding, and the first primary winding tend to be the same. When the first primary winding, the second primary winding, and the first primary winding are arranged in an L-shape, a U-shape, or other shape, the lengths of the first primary winding, the second primary winding, and the first primary winding are not the same. This embodiment limits the difference between the length of the first primary winding and the length of the first primary winding to be equal to the difference between the length of the first primary winding and the length of the second primary winding, or the lengths of the first primary winding and the second primary winding to be equal, thereby allowing for flexible arrangement of the first winding and the second winding while ensuring the coupling degree between the first winding and the second winding, and reducing the losses caused by the first winding and the second winding.

[0117] As an example, assuming the length of the first primary winding is X, the length of the first main winding is XA, and the length of the second main winding is X+A, the total length of the first and second main windings is 2X, which is twice the length X of the first primary winding. As another example, assuming the length of the first primary winding is X, the length of the first main winding is X, and the length of the second main winding is X, the total length of the first and second main windings is again 2X, twice the length X of the first primary winding. This allows for flexible configuration of the first and second windings while ensuring the coupling between them and reducing losses caused by the first and second windings.

[0118] In one specific embodiment, the main line and the secondary line are coupled at the same layer, or the main line and the secondary line are coupled at different layers.

[0119] For reference Figure 13 As shown in (a), the main line 11 and the secondary line 12 are coupled at the same layer; refer to the following Figure 11 As shown in (b), the main line 11 and the secondary line 12 are coupled in the upper and lower layers.

[0120] In one specific embodiment, reference is made to the following Figure 8As shown, the first master line includes a first master line segment 111 and a second master line segment 112. The first master line segment 111 is connected to the first end of the first winding, and the second master line segment 112 is connected to the second end of the first winding. The second master line includes a third master line segment 113 and a fourth master line segment 114. The third master line segment 113 is connected to the first end of the first winding, and the fourth master line segment 114 is connected to the second end of the first winding. The first master line segment 111 is connected to the fourth master line segment 114 through a first jumper 11a, and the third master line segment 113 is connected to the second master line segment 112 through a second jumper 11b. This ensures that the lengths of the first master line and the second master line are the same, thereby improving balance while ensuring coupling.

[0121] In one specific embodiment, reference is made to the following Figure 9 As shown, the first-level line includes a first-level line segment 121 and a second-level line segment 122. The first-level line segment 121 is connected to the first end of the second winding, and the second-level line segment 122 is connected to the second end of the second winding. The second-level line includes a third-level line segment 123 and a fourth-level line segment 124. The third-level line segment 123 is connected to the first end of the second winding, and the fourth-level line segment 124 is connected to the second end of the second winding. The first-level line segment 121 is connected to the fourth-level line segment 124 via a third jumper 12a, and the third-level line segment 123 is connected to the second-level line segment 122 via a fourth jumper 12b. This ensures that the first-level line and the second-level line have the same length, thereby improving balance while ensuring coupling.

[0122] In one specific embodiment, reference is made to the following Figure 8As shown, the first primary line segment 111 includes a first primary line segment portion 1111 and a second primary line segment portion 1112 connected in series. The angle between the first primary line segment portion 1111 and the second primary line segment portion 1112 is a first angle. Preferably, the first angle is greater than or equal to 90°. The first angle can be an angle formed by directly connecting the first primary line segment portion 1111 and the second primary line segment portion 1112, or it can be an arc angle formed by connecting them with a short arc segment. For example, the angle between the first primary line segment portion 1111 and the second primary line segment portion 1112 can be any angle such as 90°, 120°, 135°, or 150°. The second primary line segment 112 includes a third primary line segment portion 1121 and a fourth primary line segment portion 1122 connected in series. The third primary line segment portion 1121 and the second primary line segment portion 1112 are on the same virtual straight line. The angle between the third primary line segment portion 1121 and the fourth primary line segment portion 1122 is a second angle. Preferably, the second angle is greater than or equal to 90°. The second angle can be the angle formed by the direct connection of the third main line segment 1121 and the fourth main line segment 1122, or it can be an arc angle formed by connecting them with a short arc. For example, the angle between the third main line segment 1121 and the fourth main line segment 1122 can be any angle such as 90°, 120°, 135°, or 150°. This ensures that the lengths of the first main line and the second main line are the same, thereby improving balance while maintaining coupling.

[0123] In one specific embodiment, reference is made to the following Figure 9As shown, the first-level line segment 121 includes a first-level line segment portion 1211 and a second-level line segment portion 1212 connected in series. The angle between the first-level line segment portion 1211 and the second-level line segment portion 1212 is a third angle. Preferably, the third angle is greater than or equal to 90°. The third angle can be the angle formed by directly connecting the first-level line segment portion 1211 and the second-level line segment portion 1212, or it can be an arc angle formed by connecting them with a short arc segment. For example, the angle between the first-level line segment portion 1211 and the second-level line segment portion 1212 can be any angle such as 90°, 120°, 135°, or 150°. The second-level line segment 122 includes a third-level line segment portion 1221 and a fourth-level line segment portion 1222 connected in series. The third-level line segment portion 1221 and the second-level line segment portion 1212 are on the same virtual straight line. The angle between the third-level line segment portion 1221 and the fourth-level line segment portion 1222 is a fourth angle. The fourth angle is greater than or equal to 90°. The fourth angle can be the angle formed by the direct connection of the third line segment 1221 and the second line segment 1212, or it can be an arc angle formed by connecting them with a short arc. For example, the angle between the third line segment 1221 and the second line segment 1212 can be any angle such as 90°, 120°, 135°, or 150°. This ensures that the lengths of the first-level line and the second-level line are the same, thereby improving balance while maintaining coupling.

[0124] In one specific embodiment, the second winding includes a first primary line and a second primary line connected in parallel, and the first winding includes a first main line disposed between the first primary line and the second primary line.

[0125] In at least one embodiment, refer to the following Figure 3 As shown, by dividing the second winding into a first-stage line and a second-stage line connected in parallel, and placing the first main-stage line between the first-stage line and the second-stage line, the turns ratio between the first winding and the second winding can be flexibly adjusted while ensuring the coupling degree between the first winding and the second winding.

[0126] Understandably, the second winding includes, but is not limited to, a first primary winding and a second secondary winding connected in parallel, and the first winding includes, but is not limited to, a first primary winding; the second winding may also include a third primary winding and a fourth secondary winding, etc. The first winding may also include a second primary winding and a third primary winding, etc. The more primary windings connected in parallel that the first winding includes, the smaller the equivalent inductance of the first winding. The more secondary windings connected in parallel that the second winding includes, the smaller the equivalent inductance of the second winding. The number of primary windings connected in parallel that the first winding includes, and the number of secondary windings connected in parallel that the second winding includes, can be set according to actual conditions. In this embodiment, in order to ensure the coupling between the first winding and the second winding, the primary windings connected in parallel that the first winding includes and the secondary windings connected in parallel that the second winding includes are spaced apart.

[0127] Wherein, the difference between the length of the first-level line and the length of the first main-level line is equal to the difference between the length of the first main-level line and the length of the second-level line, or the length of the first-level line is equal to the length of the second-level line.

[0128] In at least one embodiment, since the first master wire is disposed between the first primary wire and the second primary wire, when the first primary wire, the second primary wire, and the first master wire are arranged in a straight line, the lengths of the first primary wire, the second primary wire, and the first master wire tend to be the same. When the first primary wire, the second primary wire, and the first master wire are arranged in an L-shape, a U-shape, or other shape, the lengths of the first primary wire, the second primary wire, and the first master wire are not the same. This embodiment limits the difference between the length of the first primary wire and the length of the first master wire to be equal to the difference between the length of the first master wire and the length of the second primary wire, or the lengths of the first primary wire and the second primary wire to be equal, thereby enabling flexible arrangement of the first winding and the second winding while ensuring the coupling degree between the first winding and the second winding, and reducing the losses caused by the first winding and the second winding.

[0129] As an example, assuming the length of the first primary winding is X, the length of the second secondary winding is XA, and the length of the second secondary winding is X+A, the total length of the first and second secondary windings is 2X, which is twice the length X of the first primary winding. As another example, assuming the length of the first secondary winding is X, the length of the first primary winding is X, and the length of the second secondary winding is X, the total length of the first and second secondary windings is again 2X, twice the length X of the first primary winding. This allows for flexible configuration of the first and second windings while ensuring the coupling between them and reducing losses caused by the first and second windings.

[0130] In one specific embodiment, reference is made to the following Figure 11 As shown, the first winding 11 includes a first main conductor, a second main conductor, and a third main conductor connected in parallel. The second winding 12 includes a first secondary conductor and a second secondary conductor. The first secondary conductor is disposed between the first and second main conductors, and the second secondary conductor is disposed between the second and third main conductors. Understandably, the secondary conductors and main conductors are alternately arranged.

[0131] In one specific embodiment, the second winding 12 includes a first secondary line, a second secondary line, and a third secondary line connected in parallel, and the first winding 11 includes a first main secondary line and a second main secondary line. The first main secondary line is disposed between the first secondary line and the second secondary line, and the second main secondary line is disposed between the second secondary line and the third main secondary line. Understandably, the secondary and main secondary lines are alternately arranged at intervals.

[0132] In one specific embodiment, the length difference between the main line and the secondary line is a first difference value, wherein the first difference value is less than or equal to 20 percent of the length of the main line or the secondary line.

[0133] In at least one embodiment, the longer the main line, the greater the equivalent inductance of the main line; similarly, the longer the secondary line, the greater the equivalent inductance of the main line. Since the main line and the secondary line are arranged sequentially, the coupling between them is optimal when their lengths are exactly equal. This embodiment limits the length difference between the main line and the secondary line to a first difference value, wherein this first difference value is less than or equal to 20% of the length of either the main line or the secondary line. This allows for flexible arrangement of the transformer layout while also improving the coupling between the first winding and the second winding.

[0134] In one specific embodiment, reference is made to the following Figures 1 to 12As shown, the main wire extends from the first end of the first winding to the second end in the same direction as the secondary wire extends from the first end of the second winding to the second end.

[0135] In at least one embodiment, the main wire can extend from the first end of the first winding to the second end along at least one direction, and the secondary wire can extend from the first end of the second winding to the second end along at least one direction, provided that the extension direction of the main wire from the first end of the first winding to the second end and the extension direction of the secondary wire from the first end of the second winding to the second end are the same. Furthermore, the extension directions of the main wire and the secondary wire in this embodiment can be arbitrary, and this embodiment does not specifically limit the extension directions of the main wire and the secondary wire.

[0136] As an example, the main wire extends from the first end of the first winding to the second end in a horizontal or vertical direction, and the secondary wire extends from the first end of the second winding to the second end in a horizontal or vertical direction as well. Alternatively, the main wire extends from the first end of the first winding to the second end in a horizontal direction first and then in a vertical direction, and the secondary wire extends from the first end of the second winding to the second end in a horizontal direction first and then in a vertical direction.

[0137] In this embodiment, the extension direction of the main line from the first end to the second end of the first winding is the same as the extension direction of the secondary line from the first end to the second end of the second winding; thereby improving the coupling between the main line and the secondary line while ensuring flexible arrangement of the main line and the secondary line layout.

[0138] In one specific embodiment, reference is made to the following Figures 1 to 3 As shown, both the main line and the secondary line are arranged in a straight line.

[0139] In at least one embodiment, since the first transformer is connected to the single-ended first amplifying transistor, when both the main line and the secondary line are arranged in a straight line, the radii of the main line and the secondary line are infinitely large, resulting in a high quality factor and low loss. Furthermore, when both the main line and the secondary line are arranged in a straight line, they occupy a small area, and their arrangement can be flexibly adjusted according to the overall layout of the RF power amplifier.

[0140] It should be noted that this embodiment does not specifically limit the direction and angle of the main line and the secondary line being arranged in a straight line. The main line and the secondary line can be arranged in a straight line along the horizontal direction, or they can be arranged in a straight line along the vertical direction, or they can be arranged in a straight line along any direction. The direction in which the main line and the secondary line are arranged in a straight line is mainly related to the position of the next-level component / circuit connected to the second winding, thereby reducing the loss caused by jumpers while achieving flexible arrangement.

[0141] In one specific embodiment, reference is made to the following Figure 10 As shown, both the main line and the secondary line are arranged in an arc shape.

[0142] In at least one embodiment, by making both the main line and the secondary line arc-shaped, the lengths of the main line and the secondary line can be increased within a limited area, thereby increasing the inductance of the main line and the secondary line and thus improving the coupling. In this embodiment, the angle of the central angle of the arc of the main line and the secondary line can be set to any angle according to actual needs.

[0143] In one specific embodiment, the central angle of the arc of the main line and the secondary line is greater than or equal to 90 degrees.

[0144] In at least one embodiment, by making the arc central angle between the main line and the secondary line greater than or equal to 90 degrees, the discontinuity of the transmitted signal can be reduced, the area utilization rate can be improved, and the overall performance of the first transformer can be improved.

[0145] In one specific embodiment, the first winding includes N first connecting segments connected in series, and the second winding includes M second connecting segments connected in series; the angle between two adjacent first connecting segments is greater than or equal to 90°, the angle between two adjacent second connecting segments is greater than or equal to 90°, and N is a positive integer greater than or equal to 2. The lengths and extension directions of the N first connecting segments may be the same or different, and the N first connecting segments can extend in any direction. The lengths and extension directions of the M second connecting segments may be the same or different, and the M second connecting segments can extend in any direction.

[0146] In at least one embodiment, when the angle between two adjacent first connecting segments is less than 90°, the signal directions between the two adjacent first connecting segments are opposite, which not only causes signal discontinuity at the corner but also causes the signals between the two adjacent first connecting segments to cancel each other out, thus affecting signal transmission performance. Therefore, this embodiment avoids signal discontinuity at the corner and improves signal transmission quality by making the angle between two adjacent first connecting segments greater than or equal to 90°. Similarly, when the angle between two adjacent second connecting segments is less than 90°, the signal directions between the two adjacent second connecting segments are opposite, which not only causes signal discontinuity at the corner but also causes the signals between the two adjacent second connecting segments to cancel each other out, thus affecting signal transmission performance. Therefore, this embodiment avoids signal discontinuity at the corner and improves signal transmission quality by making the angle between two adjacent second connecting segments greater than or equal to 90°.

[0147] In one specific embodiment, reference is made to the following Figures 4 to 5 As shown, the first winding includes two first connecting segments connected in series, with an angle of 90 degrees between the two first connecting segments, and / or the second winding includes two second connecting segments connected in series, with an angle of 90 degrees between the two second connecting segments.

[0148] Understandably, the angle between the two first connecting segments is 90 degrees, meaning the first winding can be arranged in an L-shape. Similarly, the angle between the two second connecting segments is 90 degrees, meaning the second winding can also be arranged in an L-shape.

[0149] In at least one embodiment, the first winding includes two first connecting segments connected in series, with an angle of 90 degrees between the two first connecting segments, and / or the second winding includes two second connecting segments connected in series, with an angle of 90 degrees between the two second connecting segments; thereby not only can the antenna effect at the tip be avoided, causing signal discontinuity at the corner, but the area utilization of the first transformer can also be improved, thereby further improving the overall performance of the RF power amplifier.

[0150] In one specific embodiment, reference is made to the following Figures 6 to 7 As shown, the first winding includes three first connecting segments connected in series, and the angle between two adjacent first connecting segments is 90 degrees; the second winding includes three second connecting segments connected in series, and the angle between two adjacent second connecting segments is 90 degrees.

[0151] Understandably, the angle between any two adjacent first connecting segments in the three first connecting segments is 90 degrees, meaning the first winding can be arranged in a Z-shape. Similarly, the angle between any two adjacent second connecting segments in the three second connecting segments is 90 degrees, meaning the second winding can also be arranged in a Z-shape.

[0152] In at least one embodiment, by making the angle between two adjacent first connection segments of the three first connection segments 90 degrees, and / or the angle between two adjacent second connection segments of the three second connection segments 90 degrees, not only can signal discontinuity at corners be avoided and the area utilization of the first transformer be improved, but the inductance of the first winding and the second winding can also be increased within a limited area, thereby further improving the overall performance of the RF power amplifier.

[0153] In one specific embodiment, the ratio of the line width of the first winding to the line width of the second winding is in the range of [1:2 to 2:1], or the ratio of the inductance of the first winding to the inductance of the second winding is in the range of [1:2 to 2:1].

[0154] In at least one embodiment, since the first winding and the second winding are arranged following each other, the difference between the lengths of the first winding and the second winding is small. Therefore, in order to improve the impedance conversion ratio that the first winding and the second winding can achieve, this embodiment limits the range of the line width ratio of the first winding to the line width of the second winding to [1:2 to 2:1], or limits the range of the inductance ratio of the first winding to the inductance of the second winding to [1:2 to 2:1]. This can improve the impedance conversion ratio that the first winding and the second winding can achieve while ensuring performance, and expand the application range of the first transformer.

[0155] Understandably, when the lengths of the first winding and the second winding are exactly the same, the ratio of the linewidth of the first winding to the linewidth of the second winding is equal to the ratio of the inductance of the first winding to the inductance of the second winding. Furthermore, the ratio of the linewidth of the first winding to the linewidth of the second winding is positively correlated with the impedance conversion ratio achievable by the first and second windings, and the ratio of the inductance of the first winding to the inductance of the second winding is also positively correlated with the impedance conversion ratio achievable by the first and second windings.

[0156] In one specific embodiment, the impedance at the input terminal of the first transformer is greater than the impedance at the output terminal of the first transformer, and the line width of the first winding is less than the line width of the second winding; the impedance at the input terminal of the first transformer is less than the impedance at the output terminal of the first transformer, and the line width of the first winding is greater than the line width of the second winding.

[0157] In at least one embodiment, since the primary wire of the first winding and the secondary wire of the second winding are arranged to follow each other, the inductance of the first winding and the second winding mainly depends on the line width of the first winding and the line width of the second winding. In this embodiment, by making the line widths of the first winding and the second winding different, impedance conversion from large to small or from small to large can be achieved. Specifically, the impedance at the input terminal of the first transformer is greater than the impedance at the output terminal of the first transformer, and the line width of the first winding is smaller than the line width of the second winding; conversely, the impedance at the input terminal of the first transformer is less than the impedance at the output terminal of the first transformer, and the line width of the first winding is greater than the line width of the second winding; thus, flexible adjustment of the impedance at the input and output terminals of the first transformer is achieved.

[0158] This embodiment also provides a radio frequency front-end module, as shown below. Figure 14 and Figure 15 As shown, it includes: a substrate 200, a first chip 100 disposed on the substrate 200, and a first transformer disposed on the substrate 200. The first chip 100 includes a first amplifying transistor 10. The first transformer includes a first winding 11 and a second winding 12 coupled to each other. A first end of the first winding 11 is connected to the first amplifying transistor 10, and a second end of the first winding 12 is configured to be connected to a ground terminal or a power supply terminal.

[0159] In at least one embodiment, the first amplifying transistor is disposed on a first chip, and the first transformer is disposed on a substrate. The first amplifying transistor disposed on the first chip and the first transformer disposed on the substrate can be connected by wire bonding or by inverted connection. This embodiment does not specifically limit the connection method of the first amplifying transistor and the first transformer, and any feasible method in the prior art can be adopted.

[0160] The first chip can be manufactured using GaAs (gallium arsenide) technology or CMOS (Complementary Metal Oxide Semiconductor) technology, etc.

[0161] The first winding includes a main wire connected between a first end and a second end of the first winding; the second winding includes a secondary wire connected between a first end and a second end of the second winding, and the main wire and the secondary wire are arranged to follow each other.

[0162] In at least one embodiment, the main wire of the first winding 11 and the secondary wire of the second winding 12 are arranged to follow each other, that is, the extension direction of the main wire from the first end to the second end of the first winding is the same as the extension direction of the secondary wire from the first end to the second end of the second winding. The extension direction can be any angle and shape. For example, if the main wire of the first winding 11 is straight, then the secondary wire of the second winding 12 is also straight. Or, if the main wire of the first winding 11 is L-shaped, then the secondary wire of the second winding 12 is also L-shaped. Or, if the main wire of the first winding 11 is arc-shaped, then the secondary wire of the second winding 12 is also arc-shaped. It should be noted that this embodiment does not specifically limit the shape of the main wire of the first winding 11 and the secondary wire of the second winding 12, as long as the main wire and the secondary wire are arranged to follow each other.

[0163] The distance between the first end of the first winding and the first end of the second winding is less than a first value, where the first value is the distance between the first end of the first winding and the second end of the first winding. The distance between the second end of the first winding and the second end of the second winding is less than a second value, where the second value is the distance between the first end of the second winding and the second end of the second winding.

[0164] Wherein, the first value is the straight-line distance between the first end and the second end of the first winding 11, and the second value is the straight-line distance between the first end and the second end of the second winding 12. As an example, when the main wire of the first winding 11 is arranged in a straight line, the distance between the first end and the second end of the first winding 11 is equal to the length of the main wire. Similarly, when the secondary wire of the first winding 12 is arranged in a straight line, the distance between the first end and the second end of the second winding 12 is equal to the length of the secondary wire.

[0165] In at least one embodiment, since the main line and the secondary line are arranged to follow each other, the first end of the first winding and the first end of the second winding are arranged adjacent to each other, and the second end of the first winding and the second end of the second winding are arranged adjacent to each other. Specifically, in this embodiment, the distance between the first end of the first winding and the first end of the second winding is less than the distance between the first end of the first winding and the second end of the first winding, and the distance between the second end of the first winding and the second end of the second winding is less than the distance between the first end of the second winding and the second end of the second winding. This embodiment, while ensuring the coupling degree between the main line of the first winding and the secondary line of the second winding, allows for flexible setting of the positions of the two ports of the first winding and the two ports of the second winding. Furthermore, since the radii of the first winding and the second winding are infinitely large under this implementation, the Q value (quality factor) of the first transformer can be improved. In addition, since the main line and the secondary line are arranged to follow each other, no additional jumpers are introduced, resulting in lower losses and a smaller footprint.

[0166] In this embodiment, by placing the first amplifying transistor on the first chip and the first transformer on the substrate, not only can chip area be saved, but also, due to the ample space on the substrate, the winding method of the first winding and the second winding of the first transformer can be more flexible, the coupling degree can be higher, and a greater impedance conversion ratio can be achieved.

[0167] In this embodiment, the radio frequency front-end module includes: a substrate, a first chip disposed on the substrate, and a first transformer disposed on the substrate. The first chip includes a first amplifying transistor. The first transformer includes a first winding and a second winding coupled to each other. A first end of the first winding is connected to the first amplifying transistor, and a second end of the first winding is configured to be connected to a ground terminal or a power supply terminal. The first winding includes a main line connected between the first end and the second end of the first winding. The second winding includes a secondary line connected between the first end and the second end of the second winding. The main line and the secondary line are arranged sequentially. The distance between the first end of the first winding and the first end of the second winding is less than a first value, where the first value is the distance between the first end of the first winding and the second end of the second winding. The distance between the second end of the first winding and the second end of the second winding is less than a second value, where the second value is the distance between the first end of the second winding and the second end of the second winding. In this embodiment, the first amplifying transistor is disposed on the first chip and the first transformer is disposed on the substrate, and the main line and the secondary line of the first transformer are arranged to follow each other. The distance between the first end of the first winding and the first end of the second winding is less than the distance between the first end of the first winding and the second end of the first winding, and the distance between the second end of the first winding and the second end of the second winding is less than the distance between the first end of the second winding and the second end of the second winding. Thus, while ensuring the overall performance of the RF power amplifier, not only can chip area be saved, but also flexible arrangement of the first transformer layout and a larger impedance conversion ratio can be achieved.

[0168] In one specific embodiment, the first end of the second winding is connected to the ground terminal, and the second end of the second winding is connected to the signal transmission terminal. The signal transmission terminal can be a port connected to other circuits / components.

[0169] In at least one embodiment, since the first end of the second winding is located close to the first end of the first winding, and the second end of the second winding is located close to the second end of the first winding, this embodiment can avoid excessively long jumpers when the second end of the second winding is connected to other circuits / components by connecting the first end of the second winding to the grounding end and the second end of the second winding to the signal transmission end. This reduces the loss of the first transformer caused by the jumper and makes the overall layout more compact and reasonable.

[0170] In one specific embodiment, the first end of the second winding is connected to the ground terminal on the first chip.

[0171] In at least one embodiment, since the first end of the second winding is located close to the first end of the first winding, and the second end of the second winding is located close to the second end of the first winding, while the first end of the first winding is often located close to the first chip, this embodiment can save layout space and improve space utilization by connecting the first end of the second winding to the ground terminal on the first chip when the first end of the second winding is grounded, without the need to drill a through hole on the substrate to connect to the ground.

[0172] In one specific embodiment, reference is made to the following Figure 15 As shown, the first chip also includes a first capacitor C1, and the first end of the second winding 12 is connected to the ground terminal of the first chip through the first capacitor C1.

[0173] In this embodiment, the first capacitor is configured to participate in impedance matching together with the first transformer, thereby improving the flexibility of impedance conversion. The first end of the second winding in this embodiment is connected to ground through the first capacitor C1, and the first capacitor C1 is placed on the first chip, which can improve the quality factor (Q value) of the RF front-end module while saving layout space.

[0174] In one specific embodiment, reference is made to the following Figure 15 As shown, the signal transmission end is configured to be connected to the first element 300, and the second end of the first winding and the second end of the second winding are both located in the area between the first chip 100 and the first element 300.

[0175] The first element 300 can be either an active or passive element. For example, the first element can be any type of element such as a capacitor, inductor, switch, or filter. The first element can be directly disposed on the substrate, or it can be integrated on a chip and then disposed on the substrate. This embodiment does not specifically limit the type and implementation of the first element, as long as it is a component connected to the signal transmission end.

[0176] In this embodiment, since the first transformer is a component connected between the first amplifying transistor and the first element, in order to optimize the layout and improve space utilization, the second ends of both the first winding and the second winding are located in the area between the first chip 100 and the first element 300. This allows for a more compact layout of the RF front-end module while ensuring the coupling between the first winding and the second winding.

[0177] As an example, the first chip 100 is spaced apart on the left side of the first element 300. The area between the first chip 100 and the first element 300 includes the left, upper left, or lower left area of ​​the first element 300, or the right, upper right, or lower right area of ​​the first chip 100. It is acceptable as long as the area is located on the left side of the first element 300 and the right side of the first chip 100.

[0178] In one specific embodiment, the second end of the first winding and the second end of the second winding are disposed adjacent to the first element.

[0179] In at least one embodiment, since the second ends of the first winding and the second ends of the second winding are arranged close to each other, and the second end of the second winding is connected to the first element through a signal transmission terminal, in order to reduce the jumper when the second end of the second winding is connected to the first element, the second ends of the first winding and the second ends of the second winding are arranged close to the first element, thereby reducing the loss of the first transformer caused by the jumper and making the whole layout more compact and reasonable.

[0180] In one specific embodiment, reference is made to the following Figure 15 As shown, the first end of the first winding 11 is disposed close to the first chip 100, and the second end of the first winding 11 is disposed away from the first chip 100 relative to the first end of the first winding; the first end of the second winding 12 is disposed close to the first chip 100, and the second end of the second winding 12 is disposed away from the first chip 100 relative to the first end of the second winding.

[0181] In at least one embodiment, to Figure 15 For example, the first chip is disposed to the left of the first end of the first winding 11, and the second end of the first winding 11 is disposed to the right of the first end of the first winding 11. Similarly, the first chip is disposed to the left of the first end of the second winding 12, and the second end of the second winding 12 is disposed to the right of the first end of the second winding 11.

[0182] Understandably, the second end of the first winding 11 can be located to the right of the first end of the first winding 11, and the second end of the second winding 12 can be located to the right of the first end of the second winding 12; it is not limited to this. Figure 11The location of the first winding 11. For example, the second end of the first winding 11 can be located in an area to the upper right, lower right, or directly right of the first end of the first winding 11, and the second end of the second winding 12 can be located in an area to the upper right, lower right, or directly right of the first end of the second winding 12. It is understood that the right side mentioned in this embodiment refers to the right side relative to the first chip and / or the first end of the first winding 11 / the first end of the second winding 12.

[0183] In one specific embodiment, since the first transformer is disposed on the substrate; the distance between the first end of the first winding and the first end of the second winding is in the range of [10um, 40um]; the distance between the second end of the first winding and the second end of the second winding is in the range of [10um, 40um].

[0184] In at least one embodiment, since the available area on the substrate is large, when the first transformer is disposed on the substrate, the flexibility of the layout of the first transformer can be further improved by making the distance between the first end of the first winding and the first end of the second winding range [10um, 40um] and the distance between the second end of the first winding and the second end of the second winding range [10um, 40um].

[0185] This embodiment also provides a radio frequency front-end module, as shown below. Figure 16 As shown, the device includes a substrate and a first chip disposed on the substrate. The first chip includes a first amplifying transistor and a first transformer. The first transformer includes a first winding and a second winding coupled to each other. A first end of the first winding is connected to the first amplifying transistor, and a second end of the first winding is configured to be connected to a ground terminal or a power supply terminal. The first winding includes a main wire connected between the first end and the second end of the first winding. The second winding includes a secondary wire connected between the first end and the second end of the second winding. The main wire and the secondary wire are arranged sequentially. The distance between the first end of the first winding and the first end of the second winding is less than a first value, where the first value is the distance between the first end and the second end of the first winding. The distance between the second end of the first winding and the second end of the second winding is less than a second value, where the second value is the distance between the first end and the second end of the second winding.

[0186] The first chip can be manufactured using GaAs (gallium arsenide) technology or CMOS (Complementary Metal Oxide Semiconductor) technology, etc.

[0187] It should be noted that the specific implementation and function of the first amplifying transistor and the first transformer in this embodiment are the same as those in the above embodiments, and will not be repeated here.

[0188] This embodiment integrates both the first amplifying transistor and the first transformer onto the first chip. This facilitates the connection between the first amplifying transistor and the first transformer, and also improves the overall performance of the RF front-end module (e.g., quality factor (Q value), efficiency, etc.), as well as adapting to the performance requirements of higher frequency RF signals on the RF front-end module.

[0189] This embodiment also provides a radio frequency front-end module, as shown below. Figure 17 As shown, the system includes a substrate, a first transformer, and a first chip disposed on the substrate. The first chip includes a first amplifying transistor. The first transformer includes a first winding and a second winding coupled to each other. A first end of the first winding is connected to the first amplifying transistor, and a second end of the first winding is configured to be connected to a ground terminal or a power supply terminal. The first winding includes a main wire connected between the first end and the second end of the first winding. The second winding includes a secondary wire connected between the first end and the second end of the second winding. The main wire and the secondary wire are arranged sequentially. A portion of the main wire segment is disposed on the first chip, and another portion of the main wire segment is disposed on the substrate. A portion of the secondary wire segment is disposed on the first chip, and another portion of the secondary wire segment is disposed on the substrate. The distance between the first end of the first winding and the first end of the second winding is less than a first value, where the first value is the distance between the first end of the first winding and the second end of the first winding. The distance between the second end of the first winding and the second end of the second winding is less than a second value, where the second value is the distance between the first end of the second winding and the second end of the second winding.

[0190] The first chip can be manufactured using GaAs (gallium arsenide) technology or CMOS (Complementary Metal Oxide Semiconductor) technology, etc.

[0191] It should be noted that the specific implementation and function of the first amplifying transistor and the first transformer in this embodiment are the same as those in the above embodiments, and will not be repeated here.

[0192] This embodiment sets a portion of the main line segment on the first chip and another portion of the main line segment on the substrate. Similarly, a portion of the secondary line segment is set on the first chip and another portion of the secondary line segment is set on the substrate. This not only improves the overall performance of the RF front-end module (e.g., quality factor (Q value), efficiency, etc.) and adapts to the performance requirements of higher frequency RF signals, but also allows for flexible layout of the first transformer, further reducing losses and footprint.

[0193] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A radio frequency power amplifier, characterized in that, include: Radio frequency amplification unit; A first transformer is connected to the radio frequency amplification unit; The first transformer includes a first winding and a second winding that are coupled to each other. The first winding includes a main wire connected between a first end of the first winding and a second end of the first winding; The second winding includes a secondary wire connected between the first end of the second winding and the second end of the second winding, wherein the primary wire and the secondary wire are arranged to follow each other. The distance between the first end of the first winding and the first end of the second winding is less than a first value, where the first value is the distance between the first end of the first winding and the second end of the first winding. The distance between the second end of the first winding and the second end of the second winding is less than a second value, where the second value is the distance between the first end of the second winding and the second end of the second winding.

2. The radio frequency power amplifier as described in claim 1, characterized in that, The distance between the first end of the first winding and the first end of the second winding is less than twice the line width of the main line or the secondary line; The distance between the second end of the first winding and the second end of the second winding is less than twice the line width of the main line or the secondary line.

3. The radio frequency power amplifier as described in claim 1, characterized in that, The distance between the first end of the first winding and the first end of the second winding is less than or equal to the line width of the main line or the secondary line; The distance between the second end of the first winding and the second end of the second winding is less than or equal to the line width of the main line or the secondary line.

4. The radio frequency power amplifier as described in claim 1, characterized in that, The radio frequency amplification unit includes a first amplification transistor, a first end of the first winding is connected to the first amplification transistor, and a second end of the first winding is configured to be connected to a ground terminal or a power supply terminal.

5. The radio frequency power amplifier as described in claim 1, characterized in that, The radio frequency amplification unit includes a first amplifying transistor and a second amplifying transistor, with a first end of the first winding connected to the first amplifying transistor and a second end of the first winding connected to the second amplifying transistor.

6. The radio frequency power amplifier as described in claim 1, characterized in that, The first end of the first winding and the first end of the second winding are disposed near the radio frequency amplification unit, and the second end of the first winding and the second end of the second winding are disposed away from the radio frequency amplification unit relative to the first end of the first winding and the first end of the second winding.

7. The radio frequency power amplifier as described in claim 1, characterized in that, The first end of the second winding is connected to the signal transmission end, and the second end of the second winding is grounded; or, the second end of the second winding is connected to the signal transmission end, and the first end of the second winding is grounded.

8. The radio frequency power amplifier as described in claim 1, characterized in that, The distance between the first end of the first winding and the first end of the second winding is in the range of [2um, 40um], and the distance between the second end of the first winding and the second end of the second winding is in the range of [2um, 40um].

9. The radio frequency power amplifier as described in claim 1, characterized in that, The first transformer is mounted on the chip; the distance between the first end of the first winding and the first end of the second winding is [2um, 15um]; the distance between the second end of the first winding and the second end of the second winding is [2um, 15um].

10. The radio frequency power amplifier as claimed in claim 1, characterized in that, The first transformer is mounted on a substrate; the distance between the first end of the first winding and the first end of the second winding is in the range of [10um, 40um]; the distance between the second end of the first winding and the second end of the second winding is in the range of [10um, 40um].

11. The radio frequency power amplifier as claimed in claim 1, characterized in that, The distance between the first end of the first winding and the first end of the second winding is less than half of the first value, and the distance between the second end of the first winding and the second end of the second winding is less than half of the second value.

12. The radio frequency power amplifier as claimed in claim 1, characterized in that, The first winding includes a first main conductor and a second main conductor connected in parallel; the second winding includes a first main conductor, which is disposed between the first main conductor and the second main conductor. Wherein, the difference between the length of the first primary line and the length of the first secondary line is equal to the difference between the length of the first secondary line and the length of the second primary line, or the lengths of the first primary line and the second primary line are equal.

13. The radio frequency power amplifier as described in claim 1, characterized in that, The second winding includes a first-stage line and a second-stage line connected in parallel, and the first winding includes a first-main-stage line disposed between the first-stage line and the second-stage line; Wherein, the difference between the length of the first-level line and the length of the first main-level line is equal to the difference between the length of the first main-level line and the length of the second-level line, or the length of the first-level line is equal to the length of the second-level line.

14. The radio frequency power amplifier as claimed in claim 1, characterized in that, The length difference between the main line and the secondary line is a first difference value, wherein the first difference value is less than or equal to 20 percent of the length of the main line or the secondary line.

15. The radio frequency power amplifier as claimed in claim 1, characterized in that, The main wire extends from the first end of the first winding to the second end in the same direction as the secondary wire extends from the first end of the second winding to the second end.

16. The radio frequency power amplifier as claimed in claim 1, characterized in that, Both the main line and the secondary line are arranged in a straight line.

17. The radio frequency power amplifier as claimed in claim 1, characterized in that, Both the main line and the secondary line are arranged in an arc shape.

18. The radio frequency power amplifier as claimed in claim 17, characterized in that, The central angle of the arc of the primary line and the secondary line is greater than or equal to 90 degrees.

19. The radio frequency power amplifier as claimed in claim 1, characterized in that, The first winding includes N first connecting segments connected in series, and the second winding includes M second connecting segments connected in series; the angle between two adjacent first connecting segments is greater than or equal to 90°, the angle between two adjacent second connecting segments is greater than or equal to 90°, and N is a positive integer greater than or equal to 2.

20. The radio frequency power amplifier as claimed in claim 1, characterized in that, The first winding includes two first connecting segments connected in series, with an angle of 90 degrees between the two first connecting segments, and / or the second winding includes two second connecting segments connected in series, with an angle of 90 degrees between the two second connecting segments.

21. The radio frequency power amplifier as claimed in claim 1, characterized in that, The first winding includes three first connecting segments connected in series, with an angle of 90 degrees between two adjacent first connecting segments; the second winding includes three second connecting segments connected in series, with an angle of 90 degrees between two adjacent second connecting segments.

22. The radio frequency power amplifier as claimed in claim 1, characterized in that, The ratio of the line width of the first winding to the line width of the second winding is in the range of [1:2~2:1], or the ratio of the inductance of the first winding to the inductance of the second winding is in the range of [1:2~2:1].

23. The radio frequency power amplifier as claimed in claim 1, characterized in that, The main line and the secondary line are coupled at the same layer, or the main line and the secondary line are coupled at different layers.

24. The radio frequency power amplifier as claimed in claim 12, characterized in that, The first main conductor includes a first main conductor segment and a second main conductor segment. The first main conductor segment is connected to a first end of the first winding, and the second main conductor segment is connected to a second end of the first winding. The second main conductor includes a third main conductor segment and a fourth main conductor segment. The third main conductor segment is connected to a first end of the first winding, and the fourth main conductor segment is connected to a second end of the first winding. The first main conductor segment is connected to the fourth main conductor segment via a first jumper, and the third main conductor segment is connected to the second main conductor segment via a second jumper.

25. The radio frequency power amplifier as described in claim 13, characterized in that, The first-level line includes a first-level line segment and a second-level line segment. The first-level line segment is connected to the first end of the second winding, and the second-level line segment is connected to the second end of the second winding. The second-level line includes a third-level line segment and a fourth-level line segment. The third-level line segment is connected to the first end of the second winding, and the fourth-level line segment is connected to the second end of the second winding. The first-level line segment is connected to the fourth-level line segment via a third jumper, and the third-level line segment is connected to the second-level line segment via a fourth jumper.

26. The radio frequency power amplifier as claimed in claim 24, characterized in that, The first primary line segment includes a first primary line segment portion and a second primary line segment portion connected in series. The angle between the first primary line segment portion and the second primary line segment portion is a first angle. The second primary line segment includes a third primary line segment portion and a fourth primary line segment portion connected in series. The third primary line segment portion and the second primary line segment portion are on the same virtual straight line. The angle between the third primary line segment portion and the fourth primary line segment portion is a second angle.

27. The radio frequency power amplifier as claimed in claim 25, characterized in that, The first-level line segment includes a first-level line segment and a second-level line segment connected in series, with the angle between the first-level line segment and the second-level line segment being a third angle. The second-level line segment includes a third-level line segment and a fourth-level line segment connected in series, with the third-level line segment and the second-level line segment lying on the same virtual straight line, and the angle between the third-level line segment and the fourth-level line segment being a fourth angle.

28. The radio frequency power amplifier as claimed in claim 1, characterized in that, The impedance at the input terminal of the first transformer is greater than the impedance at the output terminal of the first transformer, and the line width of the first winding is smaller than the line width of the second winding. The impedance at the input terminal of the first transformer is less than the impedance at the output terminal of the first transformer, and the line width of the first winding is greater than the line width of the second winding.

29. A radio frequency front-end module, characterized in that, include: A substrate, a first chip disposed on the substrate, and a first transformer disposed on the substrate, the first chip including a first amplifying transistor; The first transformer includes a first winding and a second winding coupled to each other. A first end of the first winding is connected to the first amplifying transistor, and a second end of the first winding is configured to be connected to a ground terminal or a power supply terminal. The first winding includes a main wire connected between a first end of the first winding and a second end of the first winding; The second winding includes a secondary wire connected between the first end of the second winding and the second end of the second winding, wherein the primary wire and the secondary wire are arranged to follow each other. The distance between the first end of the first winding and the first end of the second winding is less than a first value, where the first value is the distance between the first end of the first winding and the second end of the first winding. The distance between the second end of the first winding and the second end of the second winding is less than a second value, where the second value is the distance between the first end of the second winding and the second end of the second winding.

30. The radio frequency front-end module as described in claim 29, characterized in that, The first end of the second winding is connected to the grounding end, and the second end of the second winding is connected to the signal transmission end.

31. The radio frequency front-end module as described in claim 30, characterized in that, The first end of the second winding is connected to the ground terminal on the first chip.

32. The radio frequency front-end module as described in claim 31, characterized in that, The first chip also includes a first capacitor, and the first end of the second winding is connected to the ground terminal of the first chip through the first capacitor.

33. The radio frequency front-end module as described in claim 32, characterized in that, The signal transmission end is configured to be connected to the first element, and the second end of the first winding and the second end of the second winding are both located in the area between the first chip and the first element.

34. The radio frequency front-end module as described in claim 33, characterized in that, The second end of the first winding and the second end of the second winding are disposed adjacent to the first element.

35. The radio frequency front-end module as described in claim 29, characterized in that, The first end of the first winding is disposed close to the first chip, and the second end of the first winding is disposed away from the first chip relative to the first end of the first winding; The first end of the second winding is positioned close to the first chip, and the second end of the second winding is positioned away from the first chip relative to the first end of the second winding.

36. The radio frequency front-end module as described in claim 32, characterized in that, The distance between the first end of the first winding and the first end of the second winding is in the range of [10um, 40um]; the distance between the second end of the first winding and the second end of the second winding is in the range of [10um, 40um].

37. A radio frequency front-end module, characterized in that, A substrate, a first chip disposed on the substrate, the first chip including a first amplifying transistor and a first transformer; the first transformer including a first winding and a second winding coupled to each other, a first end of the first winding being connected to the first amplifying transistor, and a second end of the first winding being configured to be connected to a ground terminal or a power supply terminal; the first winding including a main wire connected between the first end and the second end of the first winding; the second winding including a secondary wire connected between the first end and the second end of the second winding, the main wire and the secondary wire being arranged sequentially; the distance between the first end of the first winding and the first end of the second winding is less than a first value, the first value being the distance between the first end of the first winding and the second end of the first winding; the distance between the second end of the first winding and the second end of the second winding is less than a second value, the second value being the distance between the first end of the second winding and the second end of the second winding.

38. A radio frequency front-end module, characterized in that, include: A substrate, a first transformer, and a first chip disposed on the substrate, the first chip including a first amplifying transistor; The first transformer includes a first winding and a second winding coupled to each other. A first end of the first winding is connected to the first amplifying transistor, and a second end of the first winding is configured to be connected to a ground terminal or a power supply terminal. The first winding includes a main wire connected between the first end and the second end of the first winding. The second winding includes a secondary wire connected between the first end and the second end of the second winding. The main wire and the secondary wire are arranged sequentially. A portion of the main wire segment is disposed on the first chip, and another portion of the main wire segment is disposed on the substrate. A portion of the secondary wire segment is disposed on the first chip, and another portion of the secondary wire segment is disposed on the substrate. The distance between the first end of the first winding and the first end of the second winding is less than a first value, where the first value is the distance between the first end and the second end of the first winding. The distance between the second end of the first winding and the second end of the second winding is less than a second value, where the second value is the distance between the first end and the second end of the second winding.

Images