A broadband microstrip thin-film combiner

Abstract

This invention discloses a broadband microstrip thin-film combiner, relating to the field of combiner structures. It includes at least two filter units, each filter unit comprising a resonator assembly. The first-order portion of the resonator assembly extends into the blank area between adjacent filter units by bending, thereby reducing the tap length. This invention achieves a reduction in volume and tap length without altering the resonator length by extending the first-order portions of the resonator assemblies of multiple filter units into the blank area between adjacent filter units.

Description

Technical Field

[0001] This utility model relates to the field of combiner structure, specifically to a broadband microstrip thin-film combiner. Background Technology

[0002] A combiner combines one end of two filters together, as shown in the reference. Figure 1 As shown, two channels can share a common port, allowing the signals from both channels to be combined into a single device. A microstrip thin-film combiner is a microstrip combiner fabricated using thin-film technology. A1-A7 and B1-B7 are the resonators of the filter, connected to the port via taps. The port is the connection point between the filter and other external circuits. By combining one end of two filters and then adjusting the structure of the combining end to ensure good impedance matching, a microstrip thin-film combiner can be formed. Common methods for combining two filters include vertical arrangement (see [reference]). Figure 2 (as shown) and parallel arrangement type (refer to) Figure 3 (As shown). These two structures have the following problems: a. The vertically arranged filter structure is bulky, and the two branch ports are not in the same direction, making it inconvenient to use; b. The tap lines of the horizontally arranged filter structure are too long, resulting in low harmonic frequencies and poor high-frequency suppression of the tap structure. c. If the tap line is too long, the coupling between the filter and the common tap will be reduced. Some filters with relatively wide bandwidth will not be able to use this structure for combining. Utility Model Content

[0003] The purpose of this invention is to provide a broadband microstrip thin-film combiner that extends the first-order portion of the resonator assembly of multiple filter units to the blank area between two adjacent filter units by bending, thereby solving the problems of large volume of vertically arranged filter structures and excessively long tap lines of horizontally arranged filter structures in the prior art.

[0004] This utility model embodiment is achieved through the following technical solution: This utility model embodiment provides a broadband microstrip thin film combiner, including at least two filter units, each filter unit including a resonator assembly, the first-order part of the resonator assembly extending to the blank area between two adjacent filter units by bending, so as to reduce the tap length.

[0005] Optionally, the filter unit includes filter unit A and filter unit B, where filter unit A includes a first resonator assembly and filter unit B includes a second resonator assembly. The first resonator assembly and the first-order portion of filter unit B extend to the blank area between filter unit A and filter unit B by bending. The first resonator assembly and the second resonator assembly are connected to a common port by taps. There is a gap between the first resonator assembly and the second resonator assembly in the blank area.

[0006] Optionally, the portion of the first resonator assembly bent in the blank area is parallel to the portion of the second resonator assembly bent in the blank area.

[0007] Optionally, the distance between the portion of the first resonator component bent in the blank area and the portion of the second resonator component bent in the blank area is d1, and the distance between the connection point of the tap line to the first resonator component and the connection point of the tap line to the second resonator component is d2, where d1≤d2≤5d1.

[0008] Optionally, filter unit A and filter unit B are arranged in parallel.

[0009] Optionally, filter unit A includes a first branch port, and filter unit B includes a second branch port, with the first branch port and the second branch port being parallel to each other.

[0010] Optionally, the first resonator assembly includes resonator A1, resonator A2, resonator A3, resonator A4, resonator A5, resonator A6 and resonator A7.

[0011] Optionally, the resonator A1 has a bent structure and is connected to the tap line, and the resonator A7 is connected to the first branch port.

[0012] Optionally, the second resonator assembly includes resonators B1, B2, B3, B4, B5, B6, and B7.

[0013] Optionally, the resonator B1 has a bent structure and is connected to the tap line, and the resonator B7 is connected to the second branch port.

[0014] Compared with the prior art, the embodiments of this utility model have the following advantages and beneficial effects: This utility model provides a broadband microstrip thin-film combiner that bends the first-order resonators of two filters, extending them into the gap between the two filters. The connection point between the taps and the resonators is moved towards the common port. Without changing the length of the resonators, the tap length is reduced, thereby increasing the harmonic frequency of the taps. Simultaneously, reducing the tap length increases the coupling between the first-order resonators of the filters and the common port, resulting in a wider relative bandwidth for the combiner. With this structure, the combiner can combine multiple filters in the 5GHz-6GHz and 7GHz-8.5GHz ranges.

[0015] In general, the broadband microstrip thin-film combiner provided by the embodiments of this utility model reduces the volume and the tap length without changing the length of the resonator by extending the first-order part of the resonator assembly of multiple filter units to the blank area between two adjacent filter units through bending. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 Diagram of existing filter structure; Figure 2 This is a structural diagram of a vertically arranged combiner; Figure 3 This is a structural diagram of a parallel-arranged combiner; Figure 4 A structural diagram of a combiner provided for an embodiment of this utility model.

[0018] The attached diagram shows the markings and corresponding component names: 1-First resonator assembly, 2-Second resonator assembly, 3-Tap wire, 4-Blank area, 5-Common port, 6-First branch port, 7-Second branch port. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that the terms "first", "second", "third", etc. are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Example

[0023] In the field of radio frequency and microwave communications, microstrip thin-film combiners are a key component, functioning to combine or separate multiple signal paths. The performance of this device directly impacts the overall efficiency and signal quality of the communication system. When designing microstrip thin-film combiners, special attention must be paid to their port layout and internal structure to ensure effective signal combining and separating while maintaining low signal loss and good frequency selectivity. In particular, the length of the common-terminal tap has a significant impact on the combiner's performance; excessively long taps can lead to a decrease in harmonic frequencies, affecting high-frequency suppression capabilities, posing a technical challenge for communication equipment that needs to operate at high frequencies.

[0024] Therefore, embodiments of the present invention provide a broadband microstrip thin-film combiner, with reference to Figure 4 As shown, the combiner includes at least two filter units, each filter unit including a resonator assembly, the first-order portion of the resonator assembly extending through a bend into the blank area 4 between two adjacent filter units to reduce the length of the tap line 3.

[0025] Specifically, the resonant oscillator assembly determines its resonant frequency through its physical dimensions and shape, thereby achieving selective transmission of signals at specific frequencies. Tap line 3 is the wire connecting the resonant oscillator to the signal port. The length and position of tap line 3 have a significant impact on the filter's performance, especially in the high-frequency range. This embodiment of the invention, by extending the first-order resonant oscillator into the blank area 4 between two adjacent filter units, helps to reduce the length of tap line 3, thereby improving the high-frequency suppression capability.

[0026] In this embodiment of the invention, the resonator assembly of each filter unit is connected to the signal port via tap line 3. The arrangement and layout of the resonator assembly are designed to resonate at a specific frequency, thereby achieving selective signal transmission. The bent and extended structure helps to reduce the length of the tap line 3, directly affecting the performance of the combiner in the high-frequency band. When a signal is input to the combiner, the filter unit processes the signal according to the design frequency response of the resonator assembly.

[0027] It should be noted that the number of filter units can be set according to the actual situation and is not limited here. For ease of understanding, the following will describe the setting of two filter units as an example, and is not limited to setting three or four filter units in other embodiments of this utility model.

[0028] For example, in this embodiment of the present invention, a filter unit A and a filter unit B are provided. Filter unit A includes a first resonator component 1, and filter unit B includes a second resonator component 2. The first resonator component 1 and the first-order portion of filter unit B extend to the blank area 4 between filter unit A and filter unit B by bending. The first resonator component 1 and the second resonator component 2 are connected to a common port 5 by a tap line 3. There is a gap between the first resonator component 1 and the second resonator component 2 in the blank area 4.

[0029] Specifically, filter unit A and filter unit B are responsible for processing signals in different frequency bands. The first resonator component 1 and the second resonator component 2 are located in filter unit A and filter unit B, respectively. Each resonator component contains multiple metal strips. These metal strips achieve the required resonant characteristics through a specific design. The specific arrangement structure of the metal strips is not within the scope of protection of this utility model. They can be set according to actual needs using existing methods and are not limited here.

[0030] In this embodiment of the invention, the first-order portions of the first resonator assembly 1 and B are extended into the blank area 4 between the two filter units by bending, which helps to reduce the length of the tap line 3, thereby optimizing the performance of the combiner. The first resonator assembly 1 and B are connected to the common port 5 through the tap line 3. Within the blank area 4 between filter unit A and filter unit B, there is a certain gap between the first resonator assembly 1 and the second resonator assembly 2, which helps to reduce electromagnetic interference between the two resonator assemblies and improve the selectivity and stability of the combiner.

[0031] For example, refer to Figure 4As shown, the first resonator assembly 1 includes resonators A1, A2, A3, A4, A5, A6, and A7. Resonator A1 has a bent structure and is connected to the tap line 3. Resonator A7 is connected to the first shunt port 6. The second resonator assembly 2 includes resonators B1, B2, B3, B4, B5, B6, and B7. Resonator B1 has a bent structure and is connected to the tap line 3. Resonator B7 is connected to the second shunt port 7.

[0032] In a preferred embodiment of this invention, filter unit A and filter unit B are arranged in parallel. This arrangement can effectively manage the electromagnetic field distribution between the two units, thereby reducing mutual interference between them, and also helps to maintain the stability and consistency of the signal during transmission. More preferably, filter unit A includes a first branch port 6, and filter unit B includes a second branch port 7, with the first branch port 6 and the second branch port 7 being parallel to each other.

[0033] Specifically, the first branch port 6 is the output port of filter unit A, responsible for outputting the processed signal to subsequent circuits or devices. The second branch port 7 is the output port of filter unit B, also responsible for outputting the processed signal. By setting the first branch port 6 and the second branch port 7 to be parallel to each other, the physical structure of the combiner is simplified, and manufacturing convenience may be improved. At the same time, parallel branch ports can reduce interference between ports because their distance and direction are optimized to minimize electromagnetic interference.

[0034] Furthermore, the portion of the first resonator component 1 bent in the blank area 4 is parallel to the portion of the second resonator component 2 bent in the blank area 4, which helps optimize the electromagnetic field distribution inside the combiner and reduces potential interference between different resonator components. Preferably, the distance between the portion of the first resonator component 1 bent in the blank area 4 and the portion of the second resonator component 2 bent in the blank area 4 is d1, and the distance between the connection point of the tap line 3 with the first resonator component 1 and the connection point of the tap line 3 with the second resonator component 2 is d2, where d1 ≤ d2 ≤ 5d1. By optimizing the ratio between d1 and d2, an appropriate ratio is maintained between the distance between the two resonator components and the distance at the connection point of the tap line 3, to achieve optimal electromagnetic compatibility and signal processing performance.

[0035] In summary, this embodiment of the invention places the bent portions of the first resonator assembly 1 and the second resonator assembly 2 parallel to each other within the blank area 4, and the distance d1 between them and the distance d2 at the connection point of the tap line 3 satisfy the relationship d1≤d2≤5d1, achieving optimized electromagnetic field distribution and minimized electromagnetic interference. This structure not only improves the frequency selectivity and signal integrity of the combiner but also enhances its performance stability, while simplifying the manufacturing process and reducing costs. By precisely controlling the geometric layout and connection method of the resonator assemblies, this embodiment of the invention improves the signal combining efficiency and interference suppression capability of the combiner in high-frequency communication systems, meeting the demands of modern communication for high-performance combiners, especially in wideband and high-reliability application scenarios.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model. It should be noted that the structures or components illustrated in the accompanying drawings are not necessarily drawn to scale, and descriptions of well-known components, processing techniques, and processes are omitted to avoid unnecessarily limiting the utility model.

Claims

1. A broadband microstrip thin-film combiner, characterized in that, It includes at least two filter units, each filter unit including a resonator assembly, the first-order portion of which extends by bending into the blank area (4) between two adjacent filter units to reduce the length of the tap line (3).

2. The broadband microstrip thin-film combiner according to claim 1, characterized in that, It includes filter unit A and filter unit B, wherein filter unit A includes a first resonator component (1) and filter unit B includes a second resonator component (2). The first resonator assembly (1) and the first-order portion of the filter unit B extend to the blank area (4) between the filter unit A and the filter unit B by bending. The first resonator assembly (1) and the second resonator assembly (2) are connected to the common port (5) by tap line (3). There is a gap between the first resonator assembly (1) and the second resonator assembly (2) in the blank area (4).

3. A broadband microstrip thin-film combiner according to claim 2, characterized in that, The portion of the first resonator assembly (1) bent in the blank area (4) is parallel to the portion of the second resonator assembly (2) bent in the blank area (4).

4. A broadband microstrip thin-film combiner according to claim 3, characterized in that, The distance between the portion of the first resonator assembly (1) bent in the blank area (4) and the portion of the second resonator assembly (2) bent in the blank area (4) is d1, and the distance between the connection point of the tap line (3) to the first resonator assembly (1) and the connection point of the tap line (3) to the second resonator assembly (2) is d2, wherein d1≤d2≤5d1.

5. A broadband microstrip thin-film combiner according to claim 2, characterized in that, Filter unit A and filter unit B are arranged in parallel.

6. A broadband microstrip thin-film combiner according to claim 5, characterized in that, The filter unit A includes a first branch port (6), and the filter unit B includes a second branch port (7). The first branch port (6) and the second branch port (7) are parallel to each other.

7. A broadband microstrip thin-film combiner according to claim 6, characterized in that, The first resonator assembly (1) includes resonator A1, resonator A2, resonator A3, resonator A4, resonator A5, resonator A6 and resonator A7.

8. A broadband microstrip thin-film combiner according to claim 7, characterized in that, The resonator A1 has a bent structure and is connected to the tap line (3), and the resonator A7 is connected to the first branch port (6).

9. A broadband microstrip thin-film combiner according to claim 6, characterized in that, The second resonator assembly (2) includes resonator B1, resonator B2, resonator B3, resonator B4, resonator B5, resonator B6 and resonator B7.

10. A broadband microstrip thin-film combiner according to claim 9, characterized in that, The resonator B1 has a bent structure and is connected to the tap line (3), and the resonator B7 is connected to the second branch port (7).

Images