Ultra-wideband continuous duplexer

Abstract

The utility model relates to an ultra-wideband continuous duplexer, which comprises a low-frequency filter and a high-pass filter, and the low-frequency filter and the high-pass filter are connected together through the common-end microstrip structure. According to the utility model, the working frequency range is 10 MHz to 110 GHz; wherein the low frequency passband is 10 MHz to 67 GHz; the high-frequency passband is from 67 GHz to 110 GHz; according to the utility model, the return loss in the wide frequency band of 10MHz-110GHz is superior to-12dB.

Description

Technical Field

[0001] This utility model relates to the technical field of millimeter-wave communication equipment, and in particular to an ultra-wideband continuous duplexer. Background Technology

[0002] Over the past half-century, microwave and millimeter-wave technologies have played an irreplaceable role in core technological fields such as wireless communication, greatly promoting scientific progress and human development. Among these, high-performance receivers, including multi-band receivers, are a crucial area of ​​research. The duplexer, a key component in receiver systems, not only divides frequency bands and performs filtering but also combines and separates uplink and downlink channels, providing vital support for achieving multi-band coverage in receiver systems.

[0003] A search revealed Chinese Patent Publication No. CN210272611U, which discloses a microwave duplexer for communication and measurement instruments. This duplexer is directly bonded to a cavity and includes a corresponding high-frequency signal port L and a common port C. A low-frequency signal port I is connected to the common port C. The high-frequency signal port L and the common port C are connected via a microstrip line A, and a low-pass filter is provided on the microstrip line B used to connect the low-frequency signal port I. A high-pass filter structure is formed by bonding capacitors on the microstrip line A used to connect the high-frequency signal port L and the common port C.

[0004] In summary, existing duplexer structures have a narrow operating frequency band and high return loss within that frequency band.

[0005] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create an ultra-wideband continuous duplexer, which would have greater industrial application value. Utility Model Content

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide an ultra-wideband continuous duplexer.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An ultrawideband continuous duplexer includes a low-frequency filter and a high-pass filter;

[0009] It also includes a common-terminal microstrip structure, which connects the low-frequency filter and the high-pass filter together;

[0010] The common terminal microstrip structure includes a common terminal substrate and a connection structure disposed on the common terminal substrate. The low-frequency filter includes a low-frequency filter substrate and a low-frequency filter microstrip disposed on the low-frequency filter substrate. The rear end of the low-frequency filter microstrip is connected to the high-pass filter through the connection structure. The high-pass filter is connected to the right-side bent waveguide.

[0011] As a further improvement of this utility model, a hollow rectangular waveguide is provided on the outside of the common end substrate, and the common end substrate is suspended inside the rectangular waveguide.

[0012] As a further improvement of this utility model, a hollow low-frequency filtering rectangular waveguide is provided on the outside of the low-frequency filtering substrate, and the low-frequency filtering substrate is suspended inside the low-frequency filtering rectangular waveguide.

[0013] As a further improvement of this utility model, the connection structure is suspended inside the high-pass filter.

[0014] As a further improvement of this utility model, the left side of the common terminal microstrip structure is the common port, the front end of the low-frequency filter is the low-frequency passband port, and the right side of the bent waveguide is the high-frequency passband port.

[0015] As a further improvement of this utility model, the connection structure is a T-shaped microstrip connection structure.

[0016] As a further improvement of this utility model, the connection structure is a Y-shaped microstrip connection structure.

[0017] By means of the above solution, this utility model has at least the following advantages:

[0018] 1. Wide bandwidth: The operating frequency band is 10MHz-110GHz; the low-frequency passband is 10MHz-67GHz; and the high-frequency passband is 67GHz-110GHz.

[0019] 2. Low return loss: The return loss is better than -12dB across a wide frequency band of 10MHz-110GHz.

[0020] 3. Miniaturized and easy-to-process structure.

[0021] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the following are the preferred embodiments of this utility model and are described in detail with reference to the accompanying drawings. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a schematic diagram of the structure of an ultra-wideband continuous duplexer according to this utility model;

[0024] Figure 2 yes Figure 1 Schematic diagram of the common port microstrip structure and low-frequency filter;

[0025] Figure 3 This is a schematic diagram illustrating the working principle of this utility model;

[0026] Figure 4 This is a schematic diagram of the simulation results of this utility model.

[0027] The meanings of the labels in the figures are as follows.

[0028] 1. Common terminal rectangular waveguide; 2. Common terminal microstrip structure; 3. Common port; 4. Low-frequency filtering rectangular waveguide; 5. Low-frequency filter; 6. Low-frequency passband port; 7. High-pass filter; 8. Bent waveguide; 9. High-frequency passband port; 10. Common terminal substrate; 11. Connection structure; 12. Low-frequency filtering substrate; 13. Low-frequency filtering microstrip. Detailed Implementation

[0029] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. 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 present 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.

[0031] Example

[0032] like Figures 1-4 As shown,

[0033] An ultrawideband continuous duplexer includes a low-frequency filter 5 and a high-pass filter 7, and also includes a common-terminal microstrip structure 2, through which the low-frequency filter 5 and the high-pass filter 7 are connected together.

[0034] The common terminal microstrip structure 2 includes a common terminal substrate 10 and a connection structure 11 disposed on the common terminal substrate 10. The low frequency filter 5 includes a low frequency filter substrate 12 and a low frequency filter microstrip 13 disposed on the low frequency filter substrate 12. The rear end of the low frequency filter microstrip 13 is connected to the high-pass filter 7 through the connection structure 11. The high-pass filter 7 is connected to the right-side bent waveguide 8.

[0035] Suspension mounting method for substrate or connecting structure:

[0036] A hollow rectangular waveguide 1 is provided on the outside of the common end substrate 10, and the common end substrate 10 is suspended inside the rectangular waveguide 1.

[0037] A hollow low-frequency filtering rectangular waveguide 4 is provided on the outside of the low-frequency filtering substrate 12, and the low-frequency filtering substrate 12 is suspended in the low-frequency filtering rectangular waveguide 4.

[0038] The connection structure 11 is suspended inside the high-pass filter 7.

[0039] The left side of the common terminal microstrip structure 2 is the common port 3, the front end of the low frequency filter 5 is the low frequency passband port 6, and the right side of the bent waveguide 8 is the high frequency passband port 9.

[0040] In addition, the connection structure 11 is a T-type microstrip connection structure, or the connection structure 11 is a Y-type microstrip connection structure.

[0041] 1. Common terminal rectangular waveguide; 2. Common terminal microstrip structure; 3. Common port; 4. Low-frequency filtering rectangular waveguide; 5. Low-frequency filter; 6. Low-frequency passband port; 7. High-pass filter; 8. Bent waveguide; 9. High-frequency passband port; 10. Common terminal substrate; 11. Connection structure; 12. Low-frequency filtering substrate; 13. Low-frequency filtering microstrip.

[0042] Brief description of the working principle of this utility model:

[0043] This invention is achieved using the following technical solution: a 10MHz-110GHz ultra-wideband duplexer is designed. To achieve ultra-wideband frequency selectivity, a wideband high-pass filter 7 is first designed based on a high-pass rectangular waveguide, followed by a wideband low-pass filter 5. Finally, the two filters are connected through the input terminal of a connection structure 11 for receiving wideband signals, thus realizing the wideband duplexer.

[0044] The low-pass filter 5 is based on high and low impedance characteristics, that is, high impedance lines and low impedance lines are connected in series. The substrate is made of 5880 material with a thickness of 127um and adopts a suspended microstrip structure. Metal microstrip circuits can be designed on both the upper and lower surfaces of the suspended microstrip to obtain lower losses.

[0045] The high-pass filter 7 is based on the low-frequency cutoff characteristic of the high-pass rectangular waveguide. The high-pass filter is achieved by changing the cutoff frequency of the high-pass rectangular waveguide by changing the width of the high-pass rectangular waveguide.

[0046] Meanwhile, the high-pass filter 7 also includes a suspension microstrip-high-pass rectangular waveguide transition structure (i.e., the mounting point of the connection structure 11 within the high-pass filter 7), through which the energy on the microstrip line can be effectively coupled to the waveguide for transmission.

[0047] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An ultra-wideband continuous duplexer, comprising a low-frequency filter (5) and a high-pass filter (7); Its features are: It also includes a common terminal microstrip structure (2), through which the low-frequency filter (5) and the high-pass filter (7) are connected together; The common end microstrip structure (2) includes a common end substrate (10) and a connection structure (11) disposed on the common end substrate (10). The low frequency filter (5) includes a low frequency filter substrate (12) and a low frequency filter microstrip (13) disposed on the low frequency filter substrate (12). The rear end of the low frequency filter microstrip (13) is connected to the high-pass filter (7) through the connection structure (11). The high-pass filter (7) is connected to the right-side bent waveguide (8).

2. The ultra-wideband continuous duplexer as described in claim 1, characterized in that, A hollow rectangular waveguide (1) is provided on the outside of the common end substrate (10), and the common end substrate (10) is suspended inside the rectangular waveguide (1).

3. The ultra-wideband continuous duplexer as described in claim 1, characterized in that, A hollow low-frequency filtering rectangular waveguide (4) is provided on the outside of the low-frequency filtering substrate (12), and the low-frequency filtering substrate (12) is suspended in the low-frequency filtering rectangular waveguide (4).

4. The ultra-wideband continuous duplexer as described in claim 1, characterized in that, The connection structure (11) is suspended within the high-pass filter (7).

5. The ultra-wideband continuous duplexer as described in claim 1, characterized in that, The left side of the common terminal microstrip structure (2) is the common port (3), the front end of the low frequency filter (5) is the low frequency passband port (6), and the right side of the bent waveguide (8) is the high frequency passband port (9).

6. The ultra-wideband continuous duplexer as described in claim 1, characterized in that, The connection structure (11) is a T-shaped microstrip connection structure.

7. The ultra-wideband continuous duplexer as described in claim 1, characterized in that, The connection structure (11) is a Y-shaped microstrip connection structure.

Images