A duplexer

Abstract

The present invention relates to the technical field of communication devices, and particularly to a duplexer. The duplexer includes a substrate, on which two symmetric frequency conversion regions are provided. ANT output ports are arranged on both of the two frequency conversion regions. In the frequency conversion region, a first frequency modulation interval and a second frequency modulation interval are formed by partition ribs. A TX1 input port, a low-pass tube, and a plurality of first resonators are arranged in the first frequency modulation interval. An RX1 input port and a plurality of second resonators are arranged in the second frequency modulation interval. Signals of different frequency bands are respectively input from the two frequency modulation intervals, and after being frequency modulated and integrated by a plurality of different resonators, they are output through the ANT output ports, reducing the occurrence of wide offset noise and greatly improving the sensitivity and signal strength when the signals are output.

Description

Technical Field

[0001] The present invention relates to the technical field of communication devices, and particularly to a duplexer. Background Art

[0002] In recent years, in portable terminals such as mobile phones or smart phones, multi-band communication using radio waves of multiple frequency bands has been continuously progressing. In such portable terminals, a duplexer is mounted for splitting a high-frequency signal received and transmitted by one antenna into signals of multiple frequency bands.

[0003] The main application of a duplexer is to separate signals of multiple frequency bands received by an antenna in a radio frequency circuit. It is required not only that signals within each frequency band can pass through with low loss, but also that mutual interference between multiple signals is prevented. Conversely, signals of different frequencies can also be combined together; by analogy, a duplexer (triplexer) is to separate or combine signals of multiple (three) frequency bands.

[0004] When a traditional duplexer operates as a splitter, two or more signals of different frequencies are combined after being received at the antenna, and there will be a situation of wide-offset noise when the signals of multiple frequencies are converted, thereby reducing the sensitivity between frequency signals. Summary of the Invention

[0005] The present invention provides a duplexer to solve the problem that signals of different frequencies affect each other and reduce the sensitivity between signals in the prior art.

[0006] To solve the above problems, the present invention provides a duplexer, including a substrate, on which two symmetric frequency conversion regions are provided. ANT output ports are provided on both of the two frequency conversion regions. In the frequency conversion region, a first frequency modulation interval and a second frequency modulation interval are formed by a partition rib.

[0007] Wherein, in the first frequency modulation interval, a TX1 input port, a low-pass tube and a plurality of first resonators are provided. The plurality of first resonators are sequentially and spacedly distributed in the first frequency modulation interval. The TX1 input port is electrically connected to one end of the low-pass tube, the other end of the low-pass tube is electrically connected to the first resonator at the head end, and the first resonator at the tail end is electrically connected to the ANT output port.

[0008] In the second frequency modulation interval, an RX1 input port and a plurality of second resonators are provided. The plurality of second resonators are sequentially and spacedly distributed. The first second resonator at the head end is electrically connected to the RX1 input port, and the second resonator at the tail end is electrically connected to the ANT output port.

[0009] In a possible implementation, preferably, the frequency modulation frequency of the first frequency modulation range is 2110 - 2170 MHz, and the frequency modulation frequency of the second frequency modulation range is 1920 - 1980 MHz.

[0010] In a possible implementation, preferably, the two mutually symmetric frequency conversion regions have the same structure.

[0011] In a possible implementation, preferably, 17 first resonators are arranged in the first frequency modulation range, and two adjacent first resonators are electrically connected. 17 second resonators are arranged in the second frequency modulation range, and two adjacent second resonators are electrically connected.

[0012] The beneficial effects of the present invention are as follows: The present invention provides a duplexer, which includes two mutually symmetric frequency conversion regions. In one frequency conversion region, a first frequency modulation range and a second frequency modulation range composed of partition ribs are provided. A low-pass tube and a plurality of first resonators are arranged in the first frequency modulation range, and a plurality of second resonators are arranged in the second frequency modulation range. After frequency modulation and integration of signals in different frequency bands in the two frequency modulation ranges, the signals are output through the ANT output port, reducing the occurrence of wide-offset noise and greatly improving the sensitivity and signal strength when the signals are output. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 Shows a schematic diagram of the working principle framework structure of the duplexer;

[0015] Figure 2 Shows a schematic diagram of the overall structure of the duplexer after removing the resonators in the frequency conversion region;

[0016] Figure 3 Shows a schematic diagram of the overall structure of the duplexer.

[0017] MAIN ELEMENT SYMBOL DESCRIPTION:

[0018] 10 - Substrate; 100 - Frequency conversion region; 110 - Partition rib; 120 - First frequency modulation range; 121 - TX1 input port; 122 - Low-pass tube; 123 - First resonator; 130 - Second frequency modulation range; 131 - RX1 input port; 132 - Second resonator; 200 - ANT output port. Detailed implementation manners

[0019] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0022] In the present invention, unless otherwise clearly defined and limited, terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0024] Please refer to Figure 1 、 Figure 2 and Figure 3 , the present invention provides a duplexer, which includes a substrate 10. Two symmetric frequency conversion regions 100 are provided on the substrate 10. The two frequency conversion regions 100 have the same structure, and corresponding ANT output ports 200 are provided on each frequency conversion region 100.

[0025] Specifically, in a frequency conversion region 100, a first frequency modulation interval 120 and a second frequency modulation interval 130 are separated by a partition rib 110. At the same time, a TX1 input port 121, a low-pass tube 122 and a plurality of first resonators 123 are provided in the first frequency modulation interval 120. The plurality of first resonators 123 are evenly spaced in the first frequency modulation interval 120. Two adjacent first resonators 123 are electrically connected to each other, and the first resonator 123 at the head end is electrically connected to the low-pass tube 122, and the first resonator 123 at the tail end is electrically connected to the ANT output port 200.

[0026] Specifically, an RX1 input port 131 and a plurality of second resonators 132 are provided in the second frequency modulation interval 130. The plurality of second resonators 132 are evenly spaced in the second frequency modulation interval 130, and the first second resonator 132 at the head end is electrically connected to the RX1 input port 131, and the second resonator 132 at the tail end is electrically connected to the ANT output port 200.

[0027] Please refer to Figure 2 , it should be explained that the two different frequency modulation intervals are separated by a partition rib 110, and the structures of the signal conversion channels formed by the separation between the first frequency modulation interval 120 and the second frequency modulation interval 130 are different. Through the structural design in the above solution, the occurrence of wide offset noise between resonators can be reduced, and the sensitivity and signal strength when the signal is output are greatly improved.

[0028] In the above solution, the TX1 input port 121 in the first frequency modulation interval 120 is electrically connected to the low-pass tube 122. The low-pass tube 122 is provided in the base 100. The low-pass tube 122 is electrically connected to the first resonator 123. The low-pass tube 122 is used to filter high-frequency signals and then input.

[0029] It should be explained that in this solution, different frequency modulation intervals can be regarded as different signal conversion channels, and a plurality of resonators with the same number are provided in different conversion regions. Different resonators are separated by a partition rib 110, and finally output on the low-pass tube 122 after frequency modulation integration, so that the occurrence of wide offset noise can be effectively reduced, and the sensitivity and signal strength when the signal is output are greatly improved.

[0030] It should be noted that the head end and the tail end mentioned above respectively refer to: among the multiple resonators arranged, the resonator closest to the input port is the head end resonator; the resonator closest to the output port among the multiple resonators arranged is the tail end resonator.

[0031] In the above solution, preferably, there are 17 first resonators 123 arranged in the first frequency modulation range 120, and 17 second resonators 132 arranged in the second frequency modulation range 130, and adjacent resonators are electrically connected.

[0032] Specifically, through the above structural arrangement, the frequency modulation frequency of the first frequency modulation range 120 is 2110 - 2170 MHz, and the frequency modulation frequency of the second frequency modulation range 130 is 1920 - 1980 MHz.

[0033] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0034] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A duplexer, characterized in that, it includes a substrate, two symmetric frequency conversion regions are provided on the substrate, ANT output ports are arranged on both of the two frequency conversion regions, and a first frequency modulation interval and a second frequency modulation interval are formed in the frequency conversion region by being blocked by partition ribs; wherein a TX1 input port, a low-pass tube and a plurality of first resonators are arranged in the first frequency modulation interval, the plurality of first resonators are arranged at intervals in sequence in the first frequency modulation interval, the TX1 input port is electrically connected to one end of the low-pass tube, the other end of the low-pass tube is electrically connected to the first resonator at the head end, and the first resonator at the tail end is electrically connected to the ANT output port, an RX1 input port and a plurality of second resonators are arranged in the second frequency modulation interval, the plurality of second resonators are arranged at intervals in sequence, the second resonator at the head end is electrically connected to the RX1 input port, and the second resonator at the tail end is electrically connected to the ANT output port.

2. The duplexer according to claim 1, characterized in that, the frequency modulation frequency of the first frequency modulation interval is 2110 - 2170 MHz, and the frequency modulation frequency of the second frequency modulation interval is 1920 - 1980 MHz.

3. The duplexer according to claim 1, characterized in that, the two symmetric frequency conversion regions have the same structure.

4. The duplexer according to claim 1, characterized in that, 17 first resonators are arranged in the first frequency modulation interval, and adjacent first resonators are electrically connected to each other; 17 second resonators are arranged in the second frequency modulation interval, and adjacent second resonators are electrically connected to each other.

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