Radio frequency transmitter and antenna

Abstract

The application provides a radio frequency transmitter, and belongs to the technical field of radio frequencies. The radio frequency transmitter provided by the embodiment of the present application comprises a dielectric substrate, a first transmission structure and a second transmission structure arranged on at least one side of the dielectric substrate; the first transmission structure comprises a first transmission electrode and a first reference electrode arranged in the same layer; the second transmission structure comprises a second transmission electrode and a second reference electrode arranged in the same layer; wherein the first transmission electrode and the second transmission electrode are configured to transmit a loaded radio frequency signal from one to the other. The radio frequency transmitter can achieve a direct current isolation effect while having a smaller size, thereby not affecting the size of an antenna.

Description

Technical Field

[0001] This invention belongs to the field of radio frequency technology, specifically relating to a radio frequency transmitter and antenna. Background Technology

[0002] In the RF transmission section of the antenna, the transmission structure used for RF transmission is loaded with both DC and RF signals. Therefore, it is necessary to isolate the DC signal from the transmission structure. Currently, a common method is to connect a large capacitor in series with the transmission structure, utilizing the capacitor's ability to isolate DC signals while allowing RF signals to pass through. However, using a separate capacitor results in a large space requirement, increasing the antenna size and manufacturing complexity. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art, and to provide a radio frequency transmitter that can achieve DC blocking effect while having a small size, so as not to affect the size of the antenna.

[0004] This disclosure provides a radio frequency transmitter, which includes: a dielectric substrate, a first transmission structure and a second transmission structure disposed on at least one side of the dielectric substrate;

[0005] The first transmission structure includes a first transmission electrode and a first reference electrode disposed on the same layer;

[0006] The second transmission structure includes a second transmission electrode and a second reference electrode disposed on the same layer;

[0007] The first transmission electrode and the second transmission electrode are configured such that one of them transmits the loaded radio frequency signal to the other.

[0008] The radio frequency transmitter provided in this embodiment can generate a coupling capacitor due to the coupling effect between the first transmission electrode and the second transmission electrode. On the one hand, the radio frequency signal can be transmitted through the coupling capacitor, and on the other hand, the coupling capacitor can isolate the DC signal. Therefore, the radio frequency signal can be transmitted without the need to set up a separate DC blocking structure. Thus, if the radio frequency transmitter is applied to an antenna, it occupies less space, thereby avoiding increasing the size of the antenna and simplifying the manufacturing process.

[0009] In some examples, the first transmission structure and the second transmission structure are configured at the same layer;

[0010] The orthographic projection of the first transmission electrode on the dielectric substrate does not overlap with the orthographic projection of the second transmission electrode on the dielectric substrate;

[0011] The orthographic projection of the first transmission electrode onto a plane perpendicular to the dielectric substrate at least partially overlaps with the orthographic projection of the second transmission electrode onto a plane perpendicular to the dielectric substrate.

[0012] In some examples, the first transmission electrode and the second transmission electrode are arranged adjacent to each other, the first reference electrode is disposed on the side of the first transmission electrode away from the second transmission electrode, and the second reference electrode is disposed on the side of the second transmission electrode away from the first transmission electrode.

[0013] In some examples, the first transmission electrode includes a first main body portion and a first coupling portion connected to the first main body portion and extending toward the second transmission electrode; the second transmission electrode includes a second main body portion and a second coupling portion connected to the second main body portion and extending toward the first transmission electrode.

[0014] The first coupling part and the second coupling part are configured such that one of them transmits the loaded radio frequency signal to the other.

[0015] In some examples, both the first coupling portion and the second coupling portion employ interdigitated electrodes, and the multiple interdigitated electrodes of the first coupling portion and the multiple interdigitated electrodes of the second coupling portion are alternately and spaced apart.

[0016] In some examples, it further includes: a third reference electrode disposed on the side of the dielectric substrate opposite to the first transmission structure and the second transmission structure;

[0017] The orthographic projections of the first reference electrode and the second reference electrode on the dielectric substrate are located within the orthographic projection of the third reference electrode on the dielectric substrate.

[0018] In some examples, the first transmission structure and the second transmission structure are disposed on opposite sides of the dielectric substrate; wherein the first transmission electrode and the second transmission electrode are configured to transmit a radio frequency signal loaded on one of them to the other through the dielectric substrate.

[0019] In some examples, the orthographic projection of the first transmission electrode on the dielectric substrate at least partially overlaps with the orthographic projection of the second transmission electrode on the dielectric substrate.

[0020] In some examples, the radio frequency transmitter includes a coupling region, which is the region where the first transmission electrode and the second transmission electrode produce a coupling effect;

[0021] The radio frequency transmitter further includes a DC bleed structure, which includes a disconnected first substructure and a second substructure, wherein the first substructure is connected to the first reference electrode and the second substructure is connected to the second reference electrode.

[0022] The first substructure and the second substructure are at least partially disposed in the coupling region.

[0023] In some examples, the first transmission structure, the second transmission structure, and the DC discharge structure are arranged on the same layer;

[0024] The first transmission electrode and the second transmission electrode are arranged adjacent to each other, the first reference electrode is arranged on the side of the first transmission electrode away from the second transmission electrode, and the second reference electrode is arranged on the side of the second transmission electrode away from the first electrode;

[0025] The first substructure and the second substructure are disposed between the first transmission electrode and the second transmission electrode, and the orthographic projections of the first substructure and the second substructure on the dielectric substrate do not overlap with the orthographic projections of the first transmission electrode and the second transmission electrode on the dielectric substrate.

[0026] In some examples, the first reference electrode is a defective structure, and / or the second reference electrode is a defective structure.

[0027] In some examples, the first transmission structure and the second transmission structure have the same shape and are symmetrically arranged along the length direction of the dielectric substrate.

[0028] Secondly, embodiments of this disclosure provide an antenna, which includes the radio frequency transmitter described above. Attached Figure Description

[0029] Figure 1 This is an exemplary structural diagram of a radio frequency transmitter provided in this disclosure.

[0030] Figure 2 For along Figure 1 One of the cross-sectional views cut along the DE direction.

[0031] Figure 3 This is another exemplary structural diagram of the radio frequency transmitter provided in this disclosure.

[0032] Figure 4 This is an exemplary structural diagram of the first and second transmission electrodes of the radio frequency transmitter provided in this disclosure.

[0033] Figure 5 For along Figure 1The second cross-sectional view cut along the DE direction.

[0034] Figure 6 This is another exemplary structural diagram of the radio frequency transmitter provided in this disclosure.

[0035] Figure 7 For along Figure 6 One of the cross-sectional views cut along the BC direction.

[0036] Figure 8 This is another exemplary structural diagram of the radio frequency transmitter provided in this disclosure.

[0037] Figure 9 This is another exemplary structural diagram of the radio frequency transmitter provided in this disclosure.

[0038] Figure 10 This is another exemplary structural diagram of the radio frequency transmitter provided in this disclosure. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0040] The shapes and sizes of the components in the accompanying drawings do not reflect actual proportions and are intended only to facilitate understanding of the embodiments of the present invention.

[0041] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including,” “comprising,” or “containing,” and similar terms mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0042] This disclosure is not limited to the embodiments shown in the accompanying drawings, but includes modifications to the configuration based on the manufacturing process. Therefore, the areas illustrated in the drawings are schematic, and the shapes of the areas shown illustrate specific shapes of the areas of an element, but are not intended to be limiting.

[0043] In the radio frequency (RF) transmission section of the antenna, the RF transmission structure (e.g., the first and second transmission structures) is loaded with both DC and RF signals. Therefore, it is necessary to isolate the DC signals from the transmission structure to ensure that the RF signals are not interfered with. In related technologies, a common approach is to connect a large capacitor in series with the transmission structure, utilizing the capacitor's ability to isolate DC signals while allowing RF signals to pass through. However, using a separate capacitor results in a large space requirement, increasing the antenna size and manufacturing complexity.

[0044] To address the aforementioned issues, this disclosure provides a radio frequency transmitter that achieves DC blocking while maintaining a small size, thus not affecting the antenna size and simplifying the antenna manufacturing process.

[0045] Firstly, see [the following] Figure 1 This disclosure provides a radio frequency transmitter, which includes a dielectric substrate 3, a first transmission structure 1, and a second transmission structure 2.

[0046] Specifically, the first transmission structure 1 and the second transmission structure 2 are disposed on at least one side of the dielectric substrate 3. In other words, the first transmission structure 1 and the second transmission structure 2 can be disposed on opposite sides of the dielectric substrate 3 or on the same side of the dielectric substrate 3. The first transmission structure 1 includes a first transmission electrode 11 and a first reference electrode 12 disposed on the same layer, and the second transmission structure 2 includes a second transmission electrode 21 and a second reference electrode 22 disposed on the same layer.

[0047] Furthermore, taking the first transmission structure 1 and the second transmission structure 2 as examples of using a coplanar waveguide (CPW) structure, DC bias signals are applied to the first transmission electrode 11 and the first reference electrode 12, respectively, so that the first transmission electrode 11 and the first reference electrode 12 form a first CPW structure. Similarly, DC bias signals are applied to the second transmission electrode 21 and the second reference electrode 22, respectively, so that the second transmission electrode 21 and the second reference electrode 22 form a second CPW structure. Furthermore, one of the first transmission electrode 11 and the second transmission electrode 21 acts as a receiver to receive an externally input radio frequency (RF) signal and transmits the received RF signal to the other, while the other acts as an output terminal to output an RF signal. The first transmission electrode 11 and the second transmission electrode 21 are configured to transmit the RF signal (i.e., the externally input RF signal) applied to the receiver to the output terminal through a coupling effect. Because of the coupling effect between the first transmission electrode 11 and the second transmission electrode 21, a coupling capacitance can be generated between the first transmission electrode 11 and the second transmission electrode 21. On the one hand, the radio frequency signal can be transmitted from one of the first transmission electrode 11 and the second transmission electrode 21 to the other through the coupling capacitance. On the other hand, the coupling capacitance can isolate DC signals (such as the DC bias signal mentioned above). Therefore, without the need to set a separate DC blocking structure (such as a large-capacity capacitor), the radio frequency transmitter provided in this embodiment can realize the transmission of radio frequency signals. Thus, if the radio frequency transmitter provided in this embodiment is applied to an antenna, the space occupied is small, thereby avoiding increasing the size of the antenna. Furthermore, since there is no need to set a separate DC blocking structure, the antenna manufacturing process can be simplified.

[0048] Furthermore, the first transmission electrode 11, the second transmission electrode 21, the first reference electrode 12, and the second reference electrode 22 can all extend along the first direction X. The first transmission electrode 11 has a first transmission terminal P1 and a second transmission terminal P2 at its two ends, and the second transmission electrode 21 has a third transmission terminal P3 and a fourth transmission terminal P4 at its two ends. The first transmission terminal P1 and the third transmission terminal P3 extend toward the edge of the dielectric substrate 3. One of the first transmission terminal P1 and the third transmission terminal P3 receives an externally input radio frequency signal, and the other outputs a radio frequency signal. The second transmission terminal P2 of the first transmission electrode 11 extends toward the fourth transmission terminal P4 near the second transmission electrode 21. The second transmission terminal P2 and the fourth transmission terminal P4 are arranged adjacent to each other. The distance between the second transmission terminal P2 and the fourth transmission terminal P4 can be set according to the range in which they can generate a coupling effect. Thus, the radio frequency signals on the first transmission electrode 11 and the second transmission electrode 21 can be coupled and transmitted through the coupling effect between the second transmission terminal P2 and the fourth transmission terminal P4. Since the second transmission terminal P2 and the fourth transmission terminal P4 can form a coupling capacitor through the coupling effect, the DC blocking and AC passing characteristics of the coupling capacitor can be used directly to achieve the DC blocking treatment of the radio frequency transmitter without the need to set an additional capacitor.

[0049] It should be noted that the first direction X is the length direction of the dielectric substrate 3, and the second direction Y intersects the first direction X. In some examples, the second direction Y can be perpendicular to the first direction X.

[0050] It should be noted that the distance between the second transmission end P2 of the first transmission electrode 11 and the fourth transmission end P4 of the second transmission electrode 21 can be defined as the distance between the second transmission end P2 and the fourth transmission end P4 in the second direction Y.

[0051] See in some examples Figure 1 and Figure 2 The first transmission structure 1 and the second transmission structure 2 are disposed on the same layer, that is, the first transmission electrode 11, the second transmission electrode 21, the first reference electrode 12, and the second reference electrode 22 are disposed on the same layer. The first transmission electrode 11 and the second transmission electrode 21 are disposed at intervals, that is, the orthographic projection of the first transmission electrode 11 on the dielectric substrate 3 does not overlap with the orthographic projection of the second transmission electrode 21 on the dielectric substrate 3. The orthographic projection of the first transmission electrode 11 on a plane perpendicular to the dielectric substrate 3 overlaps at least partially with the orthographic projection of the second transmission electrode 21 on a plane perpendicular to the dielectric substrate 3, so that the two can generate a coupling effect through the overlapping portion on the plane perpendicular to the dielectric substrate 3.

[0052] In some examples, the first transfer electrode 11, the second transfer electrode 21, the first reference electrode 12, and the second reference electrode 22 can be arranged on the dielectric substrate 3 in various ways, for example, see below. Figure 1 The first transmission electrode 11 and the second transmission electrode 21 are arranged adjacent to each other and spaced apart. The first reference electrode 12 is disposed on the side of the first transmission electrode 11 away from the second transmission electrode 21, and the second reference electrode 22 is disposed on the side of the second transmission electrode 21 away from the first transmission electrode 11. Furthermore, the orthographic projections of the first transmission electrode 11, the second transmission electrode 21, the first reference electrode 12, and the second reference electrode 22 on the dielectric substrate 3 do not overlap.

[0053] In some examples, the first transmission electrode 11, the second transmission electrode 21, the first reference electrode 12, and the second reference electrode 22 can also have various shapes. For example, the first transmission structure 1 can be a rectangular electrode with a notch to separate the first transmission structure 1 into the first transmission electrode 11 and the first reference electrode 12. Similarly, the second transmission structure 2 can be a rectangular electrode with a notch to separate the second transmission structure 2 into the second transmission electrode 21 and the second reference electrode 22.

[0054] See in some examples Figure 3 The first transmission electrode 11 includes a first main body portion 11a and a first coupling portion 11b connected to the first main body portion 11a and extending toward the second transmission electrode 21. Specifically, the first coupling portion 11b can be a protrusion disposed at the second transmission end P2 of the first transmission electrode 11 and extending toward the second transmission electrode 21. Correspondingly, the second transmission electrode 21 includes a second main body portion 21a and a second coupling portion 21b connected to the second main body portion 21a and extending toward the first transmission electrode 11. Specifically, the second coupling portion 21b can be a protrusion disposed at the fourth transmission end P4 of the second transmission electrode 21 and extending toward the first transmission electrode 11. The first coupling portion 11b and the second coupling portion 21b are arranged adjacent to each other. The distance between the first coupling portion 11b and the second coupling portion 21b can be set according to the range within which they can generate a coupling effect. Thus, the radio frequency signals on the first transmission electrode 11 and the second transmission electrode 21 can be coupled and transmitted through the coupling effect between the first coupling portion 11b and the second coupling portion 21b. Since the first coupling portion 11b and the second coupling portion 21b can form a coupling capacitor through the coupling effect, the DC blocking and AC passing characteristics of the coupling capacitor can be directly used to achieve DC blocking of the radio frequency transmitter without the need for an additional capacitor. By setting the first coupling portion 11b on the first main body 11a and the second coupling portion 21b on the second main body 21a, the coupling region A1 on the first transmission electrode 11 and the second transmission electrode 21 that generates a coupling effect can be controlled more precisely without having the entire first transmission electrode 11 and the entire second transmission electrode 21 arranged adjacent to each other.

[0055] In some examples, the first transmission electrode 11 includes a first main body portion 11a and a first coupling portion 11b connected to the first main body portion 11a and extending toward the second transmission electrode 21. The second transmission electrode 21 includes a second main body portion 21a and a second coupling portion 21b connected to the second main body portion 21a and extending toward the first transmission electrode 11. Both the first coupling portion 11b and the second coupling portion 21b can be electrodes of various shapes, such as rectangular electrodes, interdigitated electrodes, triangular electrodes, etc. (See [reference]). Figure 4 For ease of explanation, Figure 4 Only the first transmission electrode 1111 and the second transmission electrode 2121 are shown. Taking the example where both the first coupling part 11b and the second coupling part 21b use interdigitated electrodes, the first coupling part 11b has multiple interdigitated fingers (e.g., the interdigitated fingers represented by 11b1 in the figure), and the second coupling part 21b has multiple interdigitated fingers (e.g., the interdigitated fingers represented by 21b1 in the figure). The multiple interdigitated fingers of the first coupling part 11b are spaced apart along the first direction X on the first transmission electrode 11, and the multiple interdigitated fingers of the second coupling part 21b are spaced apart along the first direction X on the second transmission electrode 21. Furthermore, the multiple interdigitated fingers of the first coupling part 11b and the multiple interdigitated fingers of the second coupling part 21b are alternately and spaced apart, thereby generating a strong coupling effect between the multiple interdigitated fingers of the first coupling part 11b and the multiple interdigitated fingers of the second coupling part 21b, forming multiple series coupling capacitors. The area where the multiple interdigitated fingers of the first coupling part 11b and the multiple interdigitated fingers of the second coupling part 21b are distributed defines the coupling region A1.

[0056] In some examples, the first transmission structure 1 and the second transmission structure 2 of this embodiment can also adopt a grounded coplanar waveguide structure (GCPW). Specifically, see [link to relevant documentation]. Figure 5 , Figure 5 In an embodiment where the third reference electrode 4 is provided, along... Figure 1 The image shows a cross-sectional view of the radio frequency transmitter cut along the DE direction. The radio frequency transmitter may also include a third reference electrode 4, which is disposed on the side of the dielectric substrate 3 opposite to the first transmission structure 1 and the second transmission structure 2. The orthogonal projections of the first reference electrode 12 and the second reference electrode 22 onto the dielectric substrate 3 are located within the orthogonal projection of the third reference electrode 4 onto the dielectric substrate 3. The third reference electrode 4 can be electrically connected to the first reference electrode 12 and the second reference electrode 22, thereby serving as an extension surface of the reference electrode, extending the reference electrode to the back side of the dielectric substrate 3. This increases the overall structural strength of the radio frequency transmitter and provides better heat dissipation.

[0057] In some examples, the third reference electrode 4 can be electrically connected to the first reference electrode 12 and the second reference electrode 22 in various ways. For example, the portion of the first reference electrode 12 extending to the edge of the dielectric substrate 3 and the portion of the third reference electrode 4 extending to the edge of the dielectric substrate 3 are directly electrically connected through the side of the dielectric substrate 3 in the thickness direction. Similarly, the portion of the second reference electrode 22 extending to the edge of the dielectric substrate 3 and the portion of the third reference electrode 4 extending to the edge of the dielectric substrate 3 are directly electrically connected through the side of the dielectric substrate 3 in the thickness direction. Another example is that a hole can be drilled in the dielectric substrate 3, and a conductive connection portion can be provided within the hole. One end of the conductive connection portion is connected to the first reference electrode 12 and / or the second reference electrode 22, and the other end is connected to the third reference electrode 4.

[0058] See in some examples Figures 6-8 The first transmission structure 1 and the second transmission structure 2 can also be disposed on opposite sides of the dielectric substrate 3. In other words, the first transmission electrode 11 and the first reference electrode 12 are disposed on the same layer and on one side of the dielectric substrate 3, and the second transmission electrode 21 and the second reference electrode 22 are disposed on the same layer and on the side of the dielectric substrate 3 away from the first transmission electrode 11 and the first reference electrode 12. In this case, the first transmission electrode 11 and the second transmission electrode 21 are configured to transmit the radio frequency signal loaded on one of them to the other through the coupling effect generated by the dielectric substrate 3. In other words, the first transmission electrode 11 and the second transmission electrode 21 transmit the radio frequency signal received by one to the other through the coupling effect of the dielectric substrate 3. Furthermore, since only one of the first transmission structure 1 and the second transmission structure 2 needs to be arranged on one side of the dielectric substrate 3, the size in the planar direction can be reduced.

[0059] In some examples, see further. Figure 6 , Figure 6 The dashed box A2 shows the region of the orthographic projection of the second reference electrode 22 of the second transmission electrode 21 disposed on the side of the dielectric substrate 3 opposite to the first transmission electrode 11 on the dielectric substrate 3. The dashed box A3 shows the region of the orthographic projection of the second transmission electrode 21 on the dielectric substrate 3. The orthographic projection of the first transmission electrode 11 on the dielectric substrate 3 at least partially overlaps with the orthographic projection of the second transmission electrode 21 on the dielectric substrate 3. Therefore, the overlapping portion of the orthographic projections of the first transmission electrode 11 and the second transmission electrode 21 in the direction perpendicular to the dielectric substrate 3 forms a coupling capacitor, thereby achieving the effect of blocking DC and passing AC through the coupling capacitor.

[0060] In some examples, the shape and arrangement of the first transmission electrode 11, the second transmission electrode 21, the first reference electrode 12, and the second reference electrode 22 can be varied, for example, see [link to relevant documentation]. Figure 6The first transmission structure 1 can be a rectangular electrode with a notch to divide it into a first transmission electrode 11 and a first reference electrode 12. Similarly, the second transmission structure 2 can be a rectangular electrode with a notch to divide it into a second transmission electrode 21 and a second reference electrode 22. The orthographic projections of the first transmission electrode 11 and the second transmission electrode 21 onto the dielectric substrate 3 are located on the same side of the first reference electrode 12 and the second reference electrode 22. For example, see... Figure 8 The first transmission electrode 11 and the first reference electrode 12 are both linear electrodes extending along the first direction X, and the second transmission electrode 21 and the second reference electrode 22 are both linear electrodes extending along the first direction X. The first reference electrode 12 and the first transmission electrode 11 are spaced apart and adjacent to each other, and the second transmission electrode 21 and the second reference electrode 22 are spaced apart and adjacent to each other. The orthographic projections of the first transmission electrode 11 and the second transmission electrode 21 on the dielectric substrate 3 overlap, and the orthographic projections of the first reference electrode 12 and the second reference electrode 22 on the dielectric substrate 3 overlap.

[0061] See in some examples Figure 9The radio frequency transmitter includes a coupling region A1, which can be defined as the area where the first transmission electrode 11 and the second transmission electrode 21 generate a coupling effect. For example, it can be the area where the first coupling part 11b and the second coupling part 21b are distributed. In the coupling region A1, the first transmission electrode 11 and the second transmission electrode 21 form a coupling capacitor through the coupling effect. However, the coupling capacitor has a certain withstand limit. During the operation of the radio frequency transmitter, the coupling capacitor may be broken down due to sudden voltage applied to the first transmission electrode 11 or the second transmission electrode 21. As a result, the medium (e.g., air) in the coupling region becomes a conductor, shorting the first transmission electrode 11 and the second transmission electrode 21 and leaking the sudden voltage to other circuits outside the radio frequency transmitter, causing damage to other circuits. To solve the above problem, the radio frequency transmitter provided in this embodiment may also include a DC discharge structure 5. The DC discharge structure 5 includes a disconnected first substructure 51 and a second substructure 52. The first substructure 51 is connected to the first reference electrode 12, and the second substructure 52 is connected to the second reference electrode 22. At least a portion of the first substructure 51 and the second substructure 52 are disposed in the coupling region. The first substructure 51 and the second substructure 52 are configured to be electrically connected when the dielectric of the coupling region A1 becomes a conductor. That is, when the coupling capacitor is broken down, the instantaneous current will turn the dielectric of the coupling region A1 into a conductor. The conductor enables the first substructure 51 and the second substructure 52 to be electrically connected, so that the instantaneous current can flow through the first substructure 51 and the second substructure 52 to the first reference electrode 12 and the second reference electrode 22, and be discharged through the reference terminal. This can prevent the instantaneous current from leaking to other circuits outside the radio frequency transmitter and causing damage to other circuits.

[0062] In some examples, the first transmission structure 1, the second transmission structure 2, and the DC discharge structure 5 are arranged on the same layer. In other words, the first substructure 51 and the second substructure 52 of the DC discharge structure 5 are arranged on the same layer as the first reference electrode 12 and the second reference electrode 22. The first substructure 51 can be connected to the first reference electrode 12 by welding or other means, or it can be integrally formed with the first reference electrode 12. Similarly, the second substructure 52 can be connected to the second reference electrode 22 by welding or other means, or it can be integrally formed with the second reference electrode 22. No limitation is made here.

[0063] In some examples, the shapes of the first substructure 51 and the second substructure 52 can take various forms, such as linear electrodes. One end of the first substructure 51 is connected to the first reference electrode 12 and the other end extends into the coupling region. One end of the second substructure 52 is connected to the second reference electrode 22 and the other end extends into the coupling region.

[0064] In some examples, the first transmission electrode 11, the second transmission electrode 21, the first reference electrode 12, the second reference electrode 22, the first substructure 51, and the second substructure 52 can be arranged in various ways, for example, see [link to relevant documentation]. Figure 9 The first transmission electrode 11 and the second transmission electrode 21 are adjacent and spaced apart. The first reference electrode 12 is disposed on the side of the first transmission electrode 11 away from the second transmission electrode 21. The second reference electrode 22 is disposed on the side of the second transmission electrode 21 away from the first transmission electrode 11. The first substructure 51 and the second substructure 52 are disposed between the first transmission electrode 11 and the second transmission electrode 21 and are disposed in the coupling region A1. The orthographic projections of the first substructure 51 and the second substructure 52 on the dielectric substrate 3 do not overlap with the orthographic projections of the first transmission electrode 11 and the second transmission electrode 21 on the dielectric substrate 3.

[0065] See in some examples Figure 10 The first reference electrode 12 is a defective ground structure (DGS), and the second reference electrode 22 can also be a DGS structure. By using a DGS structure as the first reference electrode 12 and / or the second reference electrode 22, the distributed inductance and distributed capacitance of the CPW structure can be changed, obtaining band-stop characteristics and slow wave characteristics, thereby expanding the bandwidth of the transmittable radio frequency signals. Specifically, periodic or non-periodic notches or perforated patterns can be formed on the sheet-like first reference electrode 12 (or second reference electrode 22) to form a DGS structure. Specifically, the shape and arrangement of the notches or perforated patterns can have various forms, which are not limited here. See also Figure 10 The first reference electrode 12 is provided with a first notch S1 near the second transmission end P2 of the first transmission electrode 11. The first notch S1 can be rectangular. Correspondingly, the second reference electrode 22 is provided with a second notch S2 near the fourth transmission end P4 of the second transmission electrode 21. The second notch S2 can be rectangular.

[0066] In some examples, the first transmission structure 1 and the second transmission structure 2 have the same shape. In other words, the first transmission electrode 11 and the second transmission electrode 21 have the same shape, the first reference electrode 12 and the second reference electrode 22 have the same shape, and the first transmission structure 1 and the second transmission structure 2 are symmetrically arranged along the length direction (i.e., the first direction X) of the dielectric substrate 3, thereby simplifying the complexity of manufacturing the first transmission structure 1 and the second transmission structure 2.

[0067] In some examples, the material of the dielectric substrate 3 may include at least one of glass, polyethylene terephthalate (PET), and polyimide (PI), without limitation herein.

[0068] In some examples, the material of any of the first transmission structure 1, the second transmission structure 2, the third reference electrode 4, and the DC discharge structure 5 may include at least one of copper, aluminum, gold, and silver, without limitation herein.

[0069] Secondly, embodiments of this disclosure provide an antenna, which includes the radio frequency transmitter described above.

[0070] In some examples, the antenna may also include a pre-feed structure, a phase shifter, a radiating structure, etc. The pre-feed circuit feeds the radio frequency signal to the phase shifter. After the radio frequency signal is phase-shifted by the phase shifter, it is fed into the radio frequency transmitter through one of the first transmission electrode 11 and the second transmission electrode 21. The other of the first transmission electrode 11 and the second transmission electrode 21 feeds the radio frequency signal to the radiating unit, and the radiating unit radiates the radio frequency signal.

[0071] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A radio frequency transmitter, comprising: A dielectric substrate, and a first transmission structure and a second transmission structure disposed on at least one side of the dielectric substrate; The first transmission structure includes a first transmission electrode and a first reference electrode disposed on the same layer; The second transmission structure includes a second transmission electrode and a second reference electrode disposed on the same layer; the radio frequency transmitter includes a coupling region, which is the region where the first transmission electrode and the second transmission electrode generate a coupling effect; The first transmission electrode and the second transmission electrode are configured such that one of them transmits the loaded radio frequency signal to the other. The radio frequency transmitter further includes a DC bleed structure; the DC bleed structure includes a disconnected first substructure and a second substructure, the first substructure being connected to the first reference electrode and the second substructure being connected to the second reference electrode; at least a portion of the first substructure and the second substructure are disposed in the coupling region.

2. The radio frequency transmitter according to claim 1, wherein, The first transmission structure and the second transmission structure are configured on the same layer; The orthographic projection of the first transmission electrode on the dielectric substrate does not overlap with the orthographic projection of the second transmission electrode on the dielectric substrate; The orthographic projection of the first transmission electrode onto a plane perpendicular to the dielectric substrate at least partially overlaps with the orthographic projection of the second transmission electrode onto a plane perpendicular to the dielectric substrate.

3. The radio frequency transmitter according to claim 2, wherein, The first transmission electrode and the second transmission electrode are arranged adjacent to each other, the first reference electrode is arranged on the side of the first transmission electrode away from the second transmission electrode, and the second reference electrode is arranged on the side of the second transmission electrode away from the first transmission electrode.

4. The radio frequency transmitter according to claim 3, wherein, The first transmission electrode includes a first main body portion and a first coupling portion connected to the first main body portion and extending toward the second transmission electrode; the second transmission electrode includes a second main body portion and a second coupling portion connected to the second main body portion and extending toward the first transmission electrode. The first coupling part and the second coupling part are configured such that one of them transmits the loaded radio frequency signal to the other.

5. The radio frequency transmitter according to claim 4, wherein, Both the first coupling part and the second coupling part adopt interdigitated electrodes, and the multiple interdigitated electrodes of the first coupling part and the multiple interdigitated electrodes of the second coupling part are arranged alternately and at intervals.

6. The radio frequency transmitter according to claim 2, wherein, It also includes: a third reference electrode, disposed on the side of the dielectric substrate opposite to the first transmission structure and the second transmission structure; The orthographic projections of the first reference electrode and the second reference electrode on the dielectric substrate are located within the orthographic projection of the third reference electrode on the dielectric substrate.

7. The radio frequency transmitter according to claim 1, wherein, The first transmission structure and the second transmission structure are disposed on opposite sides of the dielectric substrate; wherein the first transmission electrode and the second transmission electrode are configured to transmit a radio frequency signal loaded on one of them to the other through the dielectric substrate.

8. The radio frequency transmitter according to claim 7, wherein, The orthographic projection of the first transmission electrode on the dielectric substrate at least partially overlaps with the orthographic projection of the second transmission electrode on the dielectric substrate.

9. The radio frequency transmitter according to claim 1, wherein, The first transmission structure, the second transmission structure, and the DC discharge structure are arranged on the same layer; The first transmission electrode and the second transmission electrode are arranged adjacent to each other, the first reference electrode is arranged on the side of the first transmission electrode away from the second transmission electrode, and the second reference electrode is arranged on the side of the second transmission electrode away from the first electrode; The first substructure and the second substructure are disposed between the first transmission electrode and the second transmission electrode, and the orthographic projections of the first substructure and the second substructure on the dielectric substrate do not overlap with the orthographic projections of the first transmission electrode and the second transmission electrode on the dielectric substrate.

10. The radio frequency transmitter according to any one of claims 1-8, wherein, The first reference electrode has a defective ground structure, and / or the second reference electrode has a defective ground structure.

11. The radio frequency transmitter according to any one of claims 1-8, wherein, The first transmission structure and the second transmission structure have the same shape and are symmetrically arranged along the length direction of the dielectric substrate.

12. An antenna, wherein, Includes the radio frequency transmitter as described in any one of claims 1-11.

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