Low-frequency and down-conversion combiner and vehicle-mounted communication device
By introducing a down-flipped resonant pillar structure into the combiner and increasing the resonant capacitance, the problem of insufficient spectrum utilization of low-frequency combiners is solved, and signal stability and loss reduction are achieved.
Patent Information
- Application Number
- CN202520352287.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-02-28
AI Technical Summary
Traditional combiners do not make full use of the low-frequency spectrum, especially in the civilian low-frequency band, and most combiners cannot down-frequency, resulting in excessive low-frequency loss.
Design a low-frequency down-converter, comprising a combiner box and low-frequency combiner components. Each combiner component includes a combiner resonant base and a down-converter resonant post. The down-converter resonant post is designed with a downward-folded cover structure to increase the resonant capacitance, thereby achieving signal down-converting and ensuring the stability of the combined signal.
By designing a frequency-reducing resonant pillar, the stability of the combined signal is improved, the loss of low-frequency signals is reduced, and 100% spectrum utilization is achieved.
Smart Images
Figure CN223941990U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of combiner technology, and in particular to a low-frequency down-converter combiner and an on-board communication device. Background Technology
[0002] With the continuous development and advancement of communication technology, especially the arrival of 5G, the spectrum is becoming increasingly congested. The spectrum among operators is generally allocated continuously (e.g., Operator A's 3400MHz-3500MHz, Operator B's 3500MHz-3600MHz). On the other hand, to save on antenna manufacturing costs or due to limitations in antenna area, multiple network devices need to share a common antenna feeder. In this case, the combiner is used as a crucial radio frequency component for sharing antenna feeders among different network devices. During the common antenna feeder combining process, it is necessary to reduce the losses caused by combining network equipment systems while ensuring that there is no spectrum loss after combining. In other words, the combiner application needs to guarantee 100% spectrum utilization for each operator.
[0003] However, traditional combiners do not make full use of the low-frequency spectrum, especially in civilian low frequencies. Moreover, most combiners in this frequency band cannot down-frequency, resulting in excessive low-frequency loss. Utility Model Content
[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and to provide a low-frequency frequency down-converter and a vehicle communication device that facilitates frequency down-conversion during low-frequency combining.
[0005] The purpose of this disclosure is achieved through the following technical solution:
[0006] A low-frequency down-conversion combiner includes: a combiner box and a low-frequency combiner assembly; the combiner box has at least two combiner cavities; the low-frequency combiner assembly includes at least two combiner elements, each combiner element being disposed within one of the combiner cavities; each combiner element includes multiple low-frequency combiner units, one low-frequency combiner unit of each combiner element is electrically connected to a low-frequency branch input terminal, and the remaining low-frequency combiner unit of each combiner element is electrically connected to a low-frequency combiner output terminal; each low-frequency combiner unit includes a combiner resonant base and a down-conversion resonant column, the combiner resonant base is connected to the bottom of the combiner cavity, the combiner resonant bases are interconnected, the down-conversion resonant column includes an interconnected mounting column and a down-conversion resonant cover, the mounting column is connected to the combiner resonant base, the down-conversion resonant cover is located on the side of the mounting column away from the combiner resonant base, and the cover edge of the down-conversion resonant cover extends toward the combiner resonant base.
[0007] In one embodiment, the frequency reduction resonant cover includes a top cover portion and a flange portion connected to each other. The top cover portion is connected to the mounting column, and the flange portion is located at the edge of the top cover portion and protrudes toward the combining resonant seat.
[0008] In one embodiment, the flange portion and the top cover portion form an angle of 60° to 135°.
[0009] In one embodiment, the flange portion and the top cover portion are arranged perpendicular to each other.
[0010] In one embodiment, the flange portion is integrally formed with the top cover portion.
[0011] In one embodiment, the diameter of the frequency-reducing resonant cover is larger than the diameter of the mounting column.
[0012] In one embodiment, the low-frequency combining unit further includes a mounting fastener, the frequency-reducing resonant column has a fixing hole, the mounting fastener passes through the fixing hole and is connected to the combining resonant base.
[0013] In one embodiment, the mounting fastener is a tapping screw.
[0014] In one embodiment, the spacing between any two adjacent low-frequency combining units is equal.
[0015] A vehicle-mounted communication device includes the low-frequency down-combiner described in any of the above embodiments.
[0016] Compared with the prior art, this disclosure has at least the following advantages:
[0017] When performing low-frequency combining, after the low-frequency signal passes through the frequency-reducing resonant column, the resonant capacitance corresponding to the frequency-reducing resonant column increases because the cover edge of the frequency-reducing resonant cover extends downward, i.e., the frequency-reducing resonant cover is turned down. This causes the frequency-reducing resonant column to reduce the frequency of part of the signal, so that the combined signal can be reduced to the specified frequency before combining, thereby improving the stability of the combined signal. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of a low-frequency down-conversion combiner in one embodiment;
[0020] Figure 2 for Figure 1 The diagram shows the internal structure of the low-frequency down-converter.
[0021] Figure 3 for Figure 2 The diagram shows a cross-sectional view of the low-frequency down-converter along the AA direction. Detailed Implementation
[0022] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure 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.
[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0025] This disclosure relates to a low-frequency down-converter. In one embodiment, the low-frequency down-converter includes a combiner box and a low-frequency combiner assembly; the combiner box has at least two combiner cavities; the low-frequency combiner assembly includes at least two combiner elements, each combiner element being disposed within one of the combiner cavities; each combiner element includes a plurality of low-frequency combiner units, one low-frequency combiner unit of each combiner element being electrically connected to a low-frequency branch input terminal, and the remaining one low-frequency combiner unit of each combiner element being electrically connected together to a low-frequency combiner output terminal; each low-frequency combiner unit includes a combiner resonant base and a down-converter resonant column, the combiner resonant base being connected to the bottom of the combiner cavity, the combiner resonant bases being interconnected, and the down-converter resonant column including an interconnected mounting column and a down-converter resonant cover, the mounting column being connected to the combiner resonant base, the down-converter resonant cover being located on the side of the mounting column away from the combiner resonant base, and the cover edge of the down-converter resonant cover extending toward the combiner resonant base. When performing low-frequency combining, after the low-frequency signal passes through the frequency-reducing resonant column, the resonant capacitance corresponding to the frequency-reducing resonant column increases because the cover edge of the frequency-reducing resonant cover extends downward, i.e., the frequency-reducing resonant cover is turned down. This causes the frequency-reducing resonant column to reduce the frequency of part of the signal, so that the combined signal can be reduced to the specified frequency before combining, thereby improving the stability of the combined signal.
[0026] Please see Figure 1 This is a schematic diagram of the structure of a low-frequency down-combiner according to an embodiment of the present disclosure.
[0027] One embodiment of the low-frequency down-converter 10 includes a combiner box 100 and a low-frequency combiner assembly 200. Please refer to the accompanying document. Figure 2 The combiner box 100 has at least two combiner cavities 102. The low-frequency combiner assembly 200 includes at least two combiner members 210, each of which is disposed within one of the combiner cavities 102. Each combiner member 210 includes a plurality of low-frequency combiner units 212. One low-frequency combiner unit 212 of each combiner member 210 is electrically connected to a low-frequency branch input terminal, and the remaining one low-frequency combiner unit 212 of each combiner member 210 is electrically connected together to a low-frequency combiner output terminal. Please refer to the following: Figure 3The low-frequency combining unit 212 includes a combining resonant base 2122 and a frequency-reducing resonant column 2124. The combining resonant base 2122 is connected to the bottom of the combining cavity 102, and the combining resonant bases 2122 are interconnected. The frequency-reducing resonant column 2124 includes an interconnected mounting column 2126 and a frequency-reducing resonant cover 2128. The mounting column 2126 is connected to the combining resonant base 2122, and the frequency-reducing resonant cover 2128 is located on the side of the mounting column 2126 away from the combining resonant base 2122. The cover edge of the frequency-reducing resonant cover 2128 extends toward the combining resonant base 2122.
[0028] In this embodiment, during low-frequency combining, after the low-frequency signal passes through the frequency-reducing resonant pillar 2124, the cover edge of the frequency-reducing resonant cover 2128 extends downward, i.e., the frequency-reducing resonant cover 2128 is turned downward, which increases the resonant capacitance corresponding to the frequency-reducing resonant pillar 2124. This causes the frequency-reducing resonant pillar 2124 to reduce the frequency of part of the signal, so that the combined signal can be reduced to a specified frequency before combining, thereby improving the stability of the combined signal.
[0029] In one embodiment, please refer to Figure 3 The frequency-reducing resonant cover 2128 includes a top cover portion 2128a and a flange portion 2128b connected to each other. The top cover portion 2128a is connected to the mounting column 2126, and the flange portion 2128b is located at the edge of the top cover portion 2128a, protruding towards the combining resonant seat 2122. In this embodiment, the top cover portion 2128a is located at the top of the mounting column 2126, and the top cover portion 2128a also serves as an outward extension of the flange portion 2128b, causing the top cover portion 2128a to extend the flange portion 2128b away from the mounting column 2126. This increases the distance between the flange portion 2128b and the mounting column 2126, thereby increasing the resonant capacitance corresponding to the frequency-reducing resonant column 2124 and achieving a better frequency-reducing effect.
[0030] Furthermore, the flanged portion 2128b and the top cover portion 2128a form an angle of 60° to 135°. The flanged portion 2128b and the top cover portion 2128a are mutually adjustable, facilitating the adjustment of the distance between the flanged portion 2128b and the mounting column 2126, thereby making the resonant capacitor corresponding to the frequency reduction resonant column 2124 adjustable. Specifically, the angle formed by the flanged portion 2128b and the top cover portion 2128a is 90°, that is, the flanged portion 2128b and the top cover portion 2128a are arranged perpendicular to each other, maximizing the resonant capacitor corresponding to the frequency reduction resonant column 2124, thereby maximizing the frequency reduction capability of the frequency reduction resonant column 2124.
[0031] In another embodiment, the flange portion 2128b is integrally formed with the top cover portion 2128a, thereby improving the overall strength of the frequency reduction resonant cover 2128.
[0032] In one embodiment, please refer to Figure 3 The diameter of the frequency-reducing resonant cover 2128 is larger than the diameter of the mounting post 2126. In this embodiment, the frequency-reducing resonant cover 2128 serves as a frequency-reducing component. The relationship between the diameters of the frequency-reducing resonant cover 2128 and the mounting post 2126 determines the variation in the size of the resonant capacitance corresponding to the frequency-reducing resonant post 2124. The larger diameter of the frequency-reducing resonant cover 2128 facilitates the formation of an equivalent resonant capacitance between the frequency-reducing resonant cover 2128 and the mounting post 2126.
[0033] In one embodiment, please refer to Figure 3 The low-frequency combining unit 212 further includes a mounting fastener 2121. The down-frequency resonant column 2124 has a fixing hole 202. The mounting fastener 2121 passes through the fixing hole 202 and is connected to the combining resonant base 2122. In this embodiment, the mounting fastener 2121 is located within the fixing hole 202. After passing through the fixing hole 202, the mounting fastener 2121 is connected to the combining resonant base 2122. That is, the mounting fastener 2121 is simultaneously connected to both the combining resonant base 2122 and the down-frequency resonant column 2124, facilitating the fixing of the down-frequency resonant column 2124 onto the combining resonant base 2122, thereby improving the installation stability of the down-frequency resonant column 2124. The mounting fastener 2121 is a tapped screw.
[0034] In one embodiment, please refer to Figure 2 The spacing between any two adjacent low-frequency combining units 212 is equal. In this embodiment, the low-frequency combining unit 212 serves as a combining transmission unit for low-frequency signals. The low-frequency combining units 212 are placed at equal intervals to minimize the loss of low-frequency signals during frequency downsampling, ensuring the integrity of the final combined output signal and avoiding distortion of the combined output signal.
[0035] In one embodiment, this disclosure also provides an in-vehicle communication device, including the low-frequency down-combiner described in any of the above embodiments. In this embodiment, the low-frequency down-conversion combiner includes a combiner box and a low-frequency combiner assembly; the combiner box has at least two combiner cavities; the low-frequency combiner assembly includes at least two combiner elements, each combiner element being disposed within one of the combiner cavities; each combiner element includes multiple low-frequency combiner units, one low-frequency combiner unit of each combiner element is electrically connected to a low-frequency branch input terminal, and the remaining low-frequency combiner unit of each combiner element is electrically connected to a low-frequency combiner output terminal; the low-frequency combiner unit includes a combiner resonant base and a down-conversion resonant column, the combiner resonant base is connected to the bottom of the combiner cavity, and each combiner resonant base is interconnected; the down-conversion resonant column includes an interconnected mounting column and a down-conversion resonant cover, the mounting column is connected to the combiner resonant base, and the down-conversion resonant cover is located on the side of the mounting column away from the combiner resonant base, with the cover edge of the down-conversion resonant cover extending toward the combiner resonant base. When performing low-frequency combining, after the low-frequency signal passes through the frequency-reducing resonant column, the resonant capacitance corresponding to the frequency-reducing resonant column increases because the cover edge of the frequency-reducing resonant cover extends downward, i.e., the frequency-reducing resonant cover is turned down. This causes the frequency-reducing resonant column to reduce the frequency of part of the signal, so that the combined signal can be reduced to the specified frequency before combining, thereby improving the stability of the combined signal.
[0036] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent disclosure. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent disclosure should be determined by the appended claims.
Claims
1. A low-frequency down-conversion combiner, characterized in that, include: A combiner box having at least two combiner cavities; A low-frequency combining assembly includes at least two combining components, each of which is disposed within a combining cavity. Each combining component includes multiple low-frequency combining units. One low-frequency combining unit of each combining component is electrically connected to a low-frequency branch input terminal, and the remaining low-frequency combining unit of each combining component is electrically connected to a low-frequency combining output terminal. Each low-frequency combining unit includes a combining resonant base and a frequency-reducing resonant column. The combining resonant base is connected to the bottom of the combining cavity, and the combining resonant bases are interconnected. Each frequency-reducing resonant column includes an interconnected mounting column and a frequency-reducing resonant cover. The mounting column is connected to the combining resonant base, and the frequency-reducing resonant cover is located on the side of the mounting column opposite to the combining resonant base, with the cover edge extending towards the combining resonant base.
2. The low-frequency down-conversion combiner according to claim 1, characterized in that, The frequency reduction resonant cover includes a top cover portion and a flange portion that are connected to each other. The top cover portion is connected to the mounting column, and the flange portion is located at the edge of the top cover portion and protrudes toward the combining resonant seat.
3. The low-frequency down-conversion combiner according to claim 2, characterized in that, The flanged portion and the top cover portion form an angle, the angle being 60° to 135°.
4. The low-frequency down-conversion combiner according to claim 3, characterized in that, The flanged portion and the top cover portion are arranged perpendicular to each other.
5. The low-frequency down-conversion combiner according to claim 2, characterized in that, The flanged portion is integrally formed with the top cover portion.
6. The low-frequency down-conversion combiner according to claim 1, characterized in that, The diameter of the frequency reduction resonant cover is larger than the diameter of the mounting column.
7. The low-frequency down-conversion combiner according to claim 1, characterized in that, The low-frequency combining unit also includes a mounting fastener. The frequency-reducing resonant column has a fixing hole, and the mounting fastener passes through the fixing hole and is connected to the combining resonant base.
8. The low-frequency down-conversion combiner according to claim 7, characterized in that, The mounting fastener is a tapping screw.
9. The low-frequency down-conversion combiner according to claim 1, characterized in that, The spacing between any two adjacent low-frequency combining units is equal.
10. A vehicle-mounted communication device, characterized in that, Includes the low-frequency down-combiner as described in any one of claims 1 to 9.