A satellite communication LTCC narrow-band band-pass filter

Abstract

The utility model discloses a satellite communication uses LTCC narrow band band pass filter, include: casing and set up in the main body of casing, the main body includes upper layer ground terminal, lower layer ground terminal, set up in the resonance subassembly between upper layer ground terminal and lower layer ground terminal, and first input and second input, first input with second input respectively set up in the both ends of resonance subassembly, the utility model discloses a satellite communication uses LTCC narrow band band pass filter, and band pass filter utilizes low temperature co -firing ceramic technology to realize. Adopt multilayer structure to reduce application frequency, and realize the out of band rejection, adopt the straight -through hole structure in input and output end to guarantee the good contact of internal conductor and side conductor, and improve yield and reliability.

Description

Technical Field

[0001] This utility model relates to the field of narrowband bandpass filters, and in particular to an LTCC narrowband bandpass filter for satellite communication. Background Technology

[0002] LTCC bandpass filters, as a type of passive microwave device, retain the signals needed in a communication system while filtering out unwanted signals. Bandpass filters are widely used in applications such as satellite communication.

[0003] Existing bandpass filters have the following drawbacks: 1. They are made using dielectric and PCB manufacturing processes, resulting in a large size; 2. Filters using LTCC technology have a hard connection between the internal signal and the side lead-out terminal. If the internal conductor is thin or has a large shrinkage rate, there is a risk of open circuit, resulting in poor reliability. Utility Model Content

[0004] This utility model overcomes the shortcomings of existing bandpass filters, which are large in size and have poor reliability, and provides an LTCC narrowband bandpass filter for satellite communication. To achieve the above objective, the technical solution adopted by this utility model is as follows: an LTCC narrowband bandpass filter for satellite communication, characterized in that it includes: a housing and a main body disposed within the housing, the main body including an upper ground terminal, a lower ground terminal, a resonant component disposed between the upper ground terminal and the lower ground terminal, and a first input terminal and a second input terminal;

[0005] The first input terminal and the second input terminal are respectively located at both ends of the resonant component.

[0006] In a preferred embodiment of this utility model, the resonant component includes four resonant structures with identical structures arranged in parallel.

[0007] In a preferred embodiment of the present invention, the resonant structure includes an upper resonant unit, a middle resonant unit, and a lower resonant unit arranged sequentially from top to bottom.

[0008] In a preferred embodiment of this utility model, the first input terminal and the second input terminal have the same structure.

[0009] In a preferred embodiment of the present invention, the first input terminal includes a surface layer, a side layer, and a lower layer that are electrically connected in sequence.

[0010] In a preferred embodiment of this invention, a suppression structure is provided between the resonant component and the lower ground terminal.

[0011] In a preferred embodiment of this utility model, the suppression structure is a Z-shaped structure, and the suppression structure includes a first segment, a second segment, and a third segment connected in sequence. The first segment and the third segment are arranged parallel to each other, and the second segment is arranged perpendicular to the first segment and the third segment.

[0012] In a preferred embodiment of the present invention, two through holes are further included, which penetrate the housing from top to bottom. One through hole is located at the first input end, and the other through hole is located at the second input end.

[0013] In a preferred embodiment of this invention, the surface layer and the side layer are connected through the through hole.

[0014] In a preferred embodiment of this invention, the upper resonant unit and the lower resonant unit have the same structure, and the middle resonant unit near the through hole is electrically connected to the side layer.

[0015] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0016] This invention discloses an LTCC narrowband bandpass filter for satellite communication, which is implemented using low-temperature co-fired ceramic technology. A multi-layer structure is employed to reduce the application frequency and achieve out-of-band rejection. Through-hole structures at the input and output terminals ensure good contact between the internal conductors and the side conductors, improving yield and reliability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0018] Figure 1 and Figure 2 This is a schematic diagram of an LTCC narrowband bandpass filter for satellite communication according to one embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the first and second input terminals of an LTCC narrowband bandpass filter for satellite communication according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the upper grounding terminal of an LTCC narrowband bandpass filter for satellite communication according to one embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the upper resonant unit of an LTCC narrowband bandpass filter for satellite communication according to one embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the middle resonant unit of an LTCC narrowband bandpass filter for satellite communication according to one embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the lower resonant unit of an LTCC narrowband bandpass filter for satellite communication according to one embodiment of the present invention.

[0024] Figure 8 This is a schematic diagram of the suppression structure of an LTCC narrowband bandpass filter for satellite communication according to one embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of the lower grounding terminal of an LTCC narrowband bandpass filter for satellite communication according to one embodiment of the present invention;

[0026] Figure 10 This is a lower layer schematic diagram of an LTCC narrowband bandpass filter for satellite communication according to one embodiment of the present invention;

[0027] Figure 11 The image shows a simulation curve of an LTCC narrowband bandpass filter for satellite communication as described in one embodiment of this utility model.

[0028] The reference numerals in the attached figures are explained as follows:

[0029] R1 - First resonant structure; R21 - Upper resonant unit; R22 - Middle resonant unit; R23 - Lower resonant unit; R2 - First resonant structure; R3 - First resonant structure; R4 - First resonant structure; G1 - Upper ground terminal; G2 - Lower ground terminal; P1 - First input terminal; P11 - Surface layer; P12 - Side layer; P13 - Lower layer; P2 - Second input terminal; V1 - Through hole; V2 - Through hole; Z1 - Suppression structure. Detailed Implementation

[0030] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present utility model in a schematic manner. Therefore, they only show the components related to the present utility model. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0031] In the description of this application, 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 based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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 limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, 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.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0034] An LTCC narrowband bandpass filter for satellite communication includes: a housing and a main body disposed within the housing. Figure 1 and Figure 2 As shown, the main body includes an upper ground terminal G1, a lower ground terminal G2, a resonant component disposed between the upper ground terminal G1 and the lower ground terminal G2, and a first input terminal P1 and a second input terminal P2.

[0035] Appendix Figures 3-10 The structure of an LTCC narrowband bandpass filter for satellite communication, from top to bottom, is disclosed.

[0036] Combination Figure 1 and Figure 3As shown, the first input terminal P1 and the second input terminal P2 are respectively located at both ends of the resonant component. The first input terminal P1 and the second input terminal P2 have the same structure. Taking the first input terminal P1 as an example, combined with... Figure 3 and Figure 10 As shown, the first input terminal P1 includes a surface layer P11, a side layer P12, and a lower layer P13 that are electrically connected in sequence. The LTCC narrowband bandpass filter for satellite communication also includes two through-holes that penetrate the housing from top to bottom. One through-hole is located at the first input terminal P1, and the other through-hole is located at the second input terminal P2. The surface layer P11 and the side layer P12 in the first input terminal P1 are connected through the through-holes to ensure a good connection.

[0037] like Figure 4 As shown, the upper grounding terminal G1 is located below the first input terminal P1 and the second input terminal P2.

[0038] The resonant component is located below the upper grounding terminal G1. For example... Figures 5-7 As shown, the resonant assembly includes four identical resonant structures arranged side-by-side: a first resonant structure R1, a second resonant structure R2, a third resonant structure R3, and a fourth resonant structure R4. Each resonant structure includes, from top to bottom, an upper resonant unit R21, a middle resonant unit R22, and a lower resonant unit R23. The upper resonant unit R21 and the lower resonant unit R23 have the same structure. The middle resonant unit R22, which is close to the through-hole, is electrically connected to the side layer P12. That is, the middle resonant unit R22 of the first resonant structure R1 and the fourth resonant structure R4 is electrically connected to the side layer P12.

[0039] like Figure 8 As shown, a suppression structure is installed between the resonant component and the lower ground terminal G2. The suppression structure is a Z-shaped structure, consisting of a first segment, a second segment, and a third segment connected in sequence. The first and third segments are arranged parallel to each other, and the second segment is arranged perpendicular to the first and third segments. Here, a Z-shaped trace is used to achieve out-of-band suppression; a through-hole structure is used at the input and output terminals to ensure good contact between the internal conductors and the side conductors, improving yield and reliability.

[0040] like Figure 9 As shown, the lower grounding terminal G2 is located below the suppression structure, and its structure is the same as that of the upper grounding terminal G1.

[0041] Simulation results are as follows Figure 11 As shown. From Figure 11 It can be seen that within the 11.2GHz~12.0GHz band, the insertion loss is ≥-3.1dB, the return loss is ≤-13.5dB, and the out-of-band suppression at 0.6GHz is ≤-27.5dB. The LTCC bandpass filter has a size of only 1.6mm×1.2mm×0.48mm.

[0042] This invention discloses an LTCC narrowband bandpass filter for satellite communication, which is implemented using low-temperature co-fired ceramic technology. A multi-layer structure is employed to reduce the application frequency and achieve out-of-band rejection. Through-hole structures at the input and output terminals ensure good contact between the internal conductors and the side conductors, improving yield and reliability.

[0043] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An LTCC narrowband bandpass filter for satellite communication, characterized in that, include: The housing and the main body disposed within the housing, the main body including an upper ground terminal, a lower ground terminal, a resonant component disposed between the upper ground terminal and the lower ground terminal, and a first input terminal and a second input terminal; The first input terminal and the second input terminal are respectively located at both ends of the resonant component.

2. The LTCC narrowband bandpass filter for satellite communication according to claim 1, characterized in that: The resonant assembly includes four identical resonant structures arranged in parallel.

3. The LTCC narrowband bandpass filter for satellite communication according to claim 2, characterized in that: The resonant structure includes an upper resonant unit, a middle resonant unit, and a lower resonant unit arranged sequentially from top to bottom.

4. The LTCC narrowband bandpass filter for satellite communication according to claim 3, characterized in that: The first input terminal has the same structure as the second input terminal.

5. The LTCC narrowband bandpass filter for satellite communication according to claim 4, characterized in that: The first input terminal includes a surface layer, a side layer, and a lower layer that are electrically connected in sequence.

6. The LTCC narrowband bandpass filter for satellite communication according to claim 5, characterized in that: It also includes two through holes that penetrate the housing from top to bottom. One through hole is located at the first input end, and the other through hole is located at the second input end.

7. The LTCC narrowband bandpass filter for satellite communication according to claim 6, characterized in that: The surface layer and the side layer are connected through the through-hole.

8. The LTCC narrowband bandpass filter for satellite communication according to claim 7, characterized in that: The upper resonant unit has the same structure as the lower resonant unit, and the middle resonant unit near the through hole is electrically connected to the side layer.

9. The LTCC narrowband bandpass filter for satellite communication according to claim 1, characterized in that: A suppression structure is provided between the resonant component and the lower ground terminal.

10. The LTCC narrowband bandpass filter for satellite communication according to claim 9, characterized in that: The suppression structure is a Z-shaped structure, comprising a first segment, a second segment, and a third segment connected in sequence. The first segment and the third segment are arranged parallel to each other, and the second segment is arranged perpendicular to the first segment and the third segment.

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