Duplexer and broadcast device

Abstract

The utility model provides a duplexer and broadcasting equipment, and relates to the technical field of broadcasting equipment. The duplexer comprises a low-frequency path and a high-frequency path, the input ends of the low-frequency path and the high-frequency path are connected with different short-wave transmitters, the output ends of the low-frequency path and the high-frequency path are connected with the same transmitting antenna, and the frequencies of signals transmitted by the low-frequency path and the high-frequency path are different. According to the embodiment of the invention, mutual interference during signal transmission can be avoided through the high-frequency path and the low-frequency path, the signal quality is improved, signals with different frequencies can be simultaneously sent to the transmitting antenna, the use number of the transmitting antenna is effectively reduced, and the installation cost and the broadcasting cost are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of broadcasting equipment, and in particular, to a duplexer and a broadcasting equipment. Background Art

[0002] Wireless broadcasting is a device that transmits broadcasts by wireless transmission. It has the characteristics of no need to erect poles and wires, wide coverage, unlimited expansion, easy installation and maintenance, low investment, and beautiful sound quality. It completely solves the problems of traditional wired broadcasting, such as difficult wiring, complex installation, poor expansion, and damage to walls and campus environment. For large-scale and wide-area environments, wireless broadcasting has advantages that traditional wired broadcasting cannot match.

[0003] In the prior art, each broadcasting device that transmits signals wirelessly usually has an antenna corresponding to the signals of different channels, and transmits the signals through the antenna. However, the small site of the broadcasting station results in a small space for setting up antennas. When the broadcasting station needs to transmit multiple signals or multiple programs, multiple transmitting antennas are often required. To install the antennas, it is necessary to find a new antenna installation space outside the broadcasting station and lay a signal transmission line connecting the antenna in the antenna installation space and the broadcasting station. The installation process is cumbersome and increases the installation cost and broadcasting cost. Utility Model Content

[0004] The embodiments of the present application provide a duplexer and a broadcast device, which can reduce the number of transmitting antennas, and reduce the installation cost and broadcast cost. To achieve this purpose, the embodiments of the present application provide the following solutions.

[0005] According to one aspect of an embodiment of the present application, a duplexer is provided for use in a broadcasting device, the duplexer comprising a low-frequency path and a high-frequency path, the input ends of the low-frequency path and the high-frequency path being connected to different shortwave transmitters, and the output ends of the low-frequency path and the high-frequency path being connected to the same transmitting antenna, the frequencies of the signals transmitted by the low-frequency path and the high-frequency path being different.

[0006] In a possible implementation manner, the impedance of the low-frequency path is the same as the impedance of the high-frequency path.

[0007] In a possible implementation, the low-frequency path includes multiple first capacitor parallel circuits and multiple first inductors connected in sequence, the first end of each first inductor is connected to one first capacitor parallel circuit, and the first capacitor parallel circuit includes multiple capacitors connected in parallel.

[0008] In a possible implementation manner, the number of the first capacitor parallel circuits is the same as the number of the first inductors, and the first end of each first inductor is correspondingly connected to one of the first capacitor parallel circuits.

[0009] In a possible implementation, the capacitance values ​​of capacitors in the same first capacitor parallel circuit are the same, and the capacitance values ​​and the number of capacitors in different first capacitor parallel circuits are the same or different.

[0010] In a possible implementation manner, a first end of a capacitor in each of the first capacitor parallel circuits is connected to the corresponding first inductor, and a second end of the capacitor in the first capacitor parallel circuit is grounded.

[0011] In a possible implementation, the high-frequency path includes a second inductor and multiple second capacitor parallel circuits connected in sequence, the first end of each second inductor is grounded, and the second end of each second inductor is correspondingly connected to one second capacitor parallel circuit.

[0012] In a possible implementation, the number of the second capacitor parallel circuits is the same as the number of the second inductors, and the first end of the capacitor in each of the second capacitor parallel circuits is correspondingly connected to one of the second inductors, and the second end of the second inductor is grounded.

[0013] According to one aspect of an embodiment of the present application, a broadcasting device is provided, which includes a first shortwave transmitter, a second shortwave transmitter, a transmitting antenna and a duplexer as described above, wherein an input end of the duplexer is connected to the first shortwave transmitter and the second shortwave transmitter, and an output end of the duplexer is connected to the transmitting antenna.

[0014] In a possible implementation manner, the first shortwave transmitter and the second shortwave transmitter have the same power.

[0015] The beneficial effects of the technical solution provided by the embodiment of the present application are:

[0016] The duplexer provided by the present application includes a low-frequency path and a high-frequency path. The input ends of the low-frequency path and the high-frequency path are connected to different shortwave transmitters, and the output ends of the low-frequency path and the high-frequency path are connected to the same pair of transmitting antennas. The frequencies of the signals transmitted by the low-frequency path and the high-frequency path are different. The embodiment of the present application can avoid mutual interference during signal transmission through the high-frequency path and the low-frequency path, improve signal quality, and can send signals of different frequencies to the transmitting antenna at the same time, effectively reducing the number of transmitting antennas used and reducing installation costs and broadcasting costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in describing the embodiments of the present application.

[0018] Figure 1A structural diagram of a duplexer provided in an embodiment of the present application;

[0019] Figure 2 A circuit diagram of a high-frequency path provided in an embodiment of the present application;

[0020] Figure 3 A circuit diagram of a low-frequency path provided in an embodiment of the present application;

[0021] Figure 4 A structural diagram of a broadcasting device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described below in conjunction with the drawings in the present application. It should be understood that the implementation methods described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0023] It will be understood by those skilled in the art that, unless specifically stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the terms "including" and "comprising" used in the embodiments of the present application refer to that the corresponding features can be implemented as the presented features, information, data, steps, operations, elements and / or components, but do not exclude the implementation of other features, information, data, steps, operations, elements, components and / or combinations thereof supported by the present technical field. It should be understood that when we say that an element is "connected" or "coupled" to another element, the one element may be directly connected or coupled to the other element, or it may refer to that the one element and the other element establish a connection relationship through an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein indicates at least one of the items defined by the term, for example, "A and / or B" indicates that it is implemented as "A", or is implemented as "A", or is implemented as "A and B".

[0024] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0025] The following describes several exemplary embodiments to illustrate the technical solutions of the embodiments of the present application and the technical effects produced by the technical solutions of the present application. It should be noted that the following embodiments can refer to, draw on or combine with each other, and the same terms, similar features and similar implementation steps in different embodiments will not be described repeatedly.

[0026] The duplexer and magnetic resonance device provided in the present application are intended to solve at least one technical problem existing in the prior art.

[0027] In an embodiment of the present application, a duplexer is provided, such as Figure 1-Figure 3 As shown, for broadcasting equipment, the duplexer includes a low-frequency path and a high-frequency path, the input ends of the low-frequency path and the high-frequency path are connected to different shortwave transmitters, and the output ends of the low-frequency path and the high-frequency path are connected to the same transmitting antenna, and the frequencies of the signals transmitted by the low-frequency path and the high-frequency path are different.

[0028] Optionally, the impedance of the low frequency path is the same as the impedance of the high frequency path.

[0029] In one embodiment, the frequency interval between the high-frequency path and the low-frequency path in the duplexer is 1MHZ, the power of the low-frequency path and the high-frequency path is 2KW, the frequency of the signal transmitted by the low-frequency path is 3.2MHZ-10MHZ, the impedance is 50Ω, the standing wave ratio is less than or equal to 2.0, and the insertion loss is less than or equal to 0.5db. The frequency of the signal transmitted by the high-frequency path is 11MHZ-26.1MHZ, the impedance is 50Ω, the standing wave ratio is less than or equal to 2.0, and the insertion loss is less than or equal to 0.5db.

[0030] Optionally, the low-frequency path includes a plurality of first capacitor parallel circuits and a plurality of first inductors connected in sequence, a first end of each first inductor is connected to a first capacitor parallel circuit, and the first capacitor parallel circuit includes a plurality of capacitors connected in parallel.

[0031] Optionally, the number of the first capacitor parallel circuits is the same as the number of the first inductors, and the first end of each first inductor is correspondingly connected to one first capacitor parallel circuit.

[0032] In one embodiment, the number of the first capacitor parallel circuit and the number of the first inductor are both 9.

[0033] Optionally, the capacitance values ​​of the capacitors in the same first capacitor parallel circuit are the same, and the capacitance values ​​and the number of capacitors in different first capacitor parallel circuits are the same or different. The first end of the capacitor in each first capacitor parallel circuit is connected to the corresponding first inductor, and the second end of the capacitor in the first capacitor parallel circuit is grounded.

[0034] In one embodiment, Figure 2As shown, the first inductor includes inductor L1, inductor L2, inductor L3, inductor L4, inductor L5, inductor L6, inductor L7, inductor L8, and inductor L9. The first capacitor parallel circuit connected to the first end of the inductor L1 includes capacitor C1, capacitor C2, capacitor C3, and capacitor C4. The first capacitor parallel circuit connected to the first end of the inductor L2 includes capacitor C4, capacitor C6, capacitor C7, capacitor C8, capacitor C9, and capacitor C10. The first capacitor parallel circuit connected to the first end of the inductor L3 includes capacitor C11, capacitor C12, capacitor C13, capacitor C14, capacitor C15, capacitor C16, capacitor C17, and capacitor C18. The first capacitor parallel circuit connected to the first end of the inductor L4 includes capacitor C19, capacitor C20, capacitor C21, capacitor C22, capacitor C23, capacitor C24, capacitor C25, and capacitor C26. The first capacitor parallel circuit connected to the first end of the inductor L5 includes capacitor C27, capacitor C28, capacitor C29, capacitor C30, capacitor C31, capacitor C32, capacitor C33, and capacitor C34. The first capacitor parallel circuit connected to the first end of the inductor L6 includes capacitor C35, capacitor C36, capacitor C37, capacitor C38, capacitor C39, capacitor C40, capacitor C41, and capacitor C42. The first capacitor parallel circuit connected to the first end of the inductor L7 includes capacitor C43, capacitor C44, capacitor C45, capacitor C46, ​​capacitor C47, capacitor C48, capacitor C49, and capacitor C50. The first capacitor parallel circuit connected to the first end of the inductor L8 includes capacitor C51, capacitor C52, capacitor C53, capacitor C54, capacitor C55, capacitor C56, capacitor C57, and capacitor C58. The first end of the inductor L9 is connected to a first capacitor parallel circuit including capacitor C59, capacitor C60, capacitor C61, capacitor C62, capacitor C63, and capacitor C64.

[0035] Optionally, the high-frequency path includes a second inductor and a plurality of second capacitor parallel circuits connected in sequence, a first end of each second inductor is grounded, and a second end of each second inductor is correspondingly connected to one second capacitor parallel circuit.

[0036] Optionally, the number of second capacitor parallel circuits is the same as the number of second inductors, and the first end of the capacitor in each second capacitor parallel circuit is connected to a corresponding second inductor, and the second end of the second inductor is grounded. The second inductors correspond to the second capacitor parallel circuits one by one.

[0037] In one embodiment, Figure 3As shown, the number of the second capacitor parallel circuit and the second inductor is 9, and the second inductor includes inductor L10, inductor L11, inductor L12, inductor L13, inductor L14, inductor L15, inductor L16, inductor L17, and inductor L18. Among them, the second end of the inductor L10 is grounded, and the second capacitor parallel circuit corresponding to the inductor L10 includes capacitor C65, capacitor C66, capacitor C67, and capacitor C68. The second end of the inductor L11 is grounded, and the second capacitor parallel circuit corresponding to the inductor L11 includes capacitor C69, capacitor C70, capacitor C71, and capacitor C72. The second end of the inductor L12 is grounded, and the second capacitor parallel circuit corresponding to the inductor L12 includes capacitor C73, capacitor C74, capacitor C75, capacitor C76, capacitor C77, and capacitor C78. The second end of the inductor L13 is grounded, and the second capacitor parallel circuit corresponding to the inductor L13 includes capacitor C79, capacitor C80, capacitor C81, capacitor C82, capacitor C83, and capacitor C84. The second end of the inductor L14 is grounded, and the second capacitor parallel circuit corresponding to the inductor L14 includes capacitor C85, capacitor C86, capacitor C87, capacitor C88, capacitor C89, and capacitor C90. The second end of the inductor L15 is grounded, and the second capacitor parallel circuit corresponding to the inductor L15 includes capacitor C91, capacitor C92, capacitor C93, capacitor C94, capacitor C95, and capacitor C96. The second end of the inductor L16 is grounded, and the second capacitor parallel circuit corresponding to the inductor L16 includes capacitor C97, capacitor C98, capacitor C99, capacitor C100, capacitor C101, and capacitor C102. The second end of the inductor L17 is grounded, and the second capacitor parallel circuit corresponding to the inductor L17 includes capacitors C103, C104, C105, and C106. The second end of the inductor L18 is grounded, and the second capacitor parallel circuit corresponding to the inductor L18 includes capacitors C107, C108, C109, and C110.

[0038] The duplexer of the present application has the following advantages:

[0039] 1. The operating frequency range is wide and can reach multiple octaves;

[0040] 2. Large rated power, single-channel input up to 2kW, two-channel combined output can reach 5kW;

[0041] 3. The frequency interval is small, and the operating frequency of the low-frequency channel and the high-frequency channel differs by only 1MHz;

[0042] 4. High isolation. When the frequency interval is only 1MHz, the isolation is still ≥23dB;

[0043] 5. The insertion loss is small, ≤0.5dB in the whole frequency band.

[0044] According to one aspect of an embodiment of the present application, a broadcast device is provided, such as Figure 4 As shown, the broadcasting device includes a first shortwave transmitter, a second shortwave transmitter, a transmitting antenna and a duplexer as described in the above embodiment, the input end of the duplexer is connected to the first shortwave transmitter and the second shortwave transmitter, and the output end of the duplexer is connected to the transmitting antenna.

[0045] Optionally, the first shortwave transmitter and the second shortwave transmitter have the same power.

[0046] In one embodiment, the power of the first shortwave transmitter and the second shortwave transmitter are the same, both 2KW. The low-frequency path in the duplexer is connected to the first shortwave transmitter of 2kW, the input end of the high-frequency path is connected to the second shortwave transmitter of 2kW, and the output end of the low-frequency path and the output end of the high-frequency path are connected together and connected to the transmitting antenna. Thus, the signals of different frequencies broadcasted simultaneously by the two shortwave transmitters are sent to the same transmitting antenna.

[0047] The terms "first", "second", "third", "fourth", "1", "2", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that shown or described in the drawings.

[0048] It should be understood that, although each operation step is indicated by arrows in the flowchart of the embodiment of the present application, the implementation order of these steps is not limited to the order indicated by the arrows. Unless clearly stated herein, in some implementation scenarios of the embodiment of the present application, the implementation steps in each flowchart can be performed in other orders according to demand. In addition, some or all of the steps in each flowchart may include multiple sub-steps or multiple stages based on actual implementation scenarios. Some or all of these sub-steps or stages may be executed at the same time, and each sub-step or stage in these sub-steps or stages may also be executed at different times respectively. In different scenarios of execution time, the execution order of these sub-steps or stages may be flexibly configured according to demand, and the embodiment of the present application does not limit this.

[0049] The above is only an optional implementation method for some implementation scenarios of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the solution of the present application, other similar implementation methods based on the technical ideas of the present application are also within the protection scope of the embodiments of the present application.

Claims

1. A duplexer, characterized in that: Used in broadcasting equipment, the duplexer includes a low-frequency path and a high-frequency path, the input ends of the low-frequency path and the high-frequency path are connected to different shortwave transmitters, and the output ends of the low-frequency path and the high-frequency path are connected to the same transmitting antenna, and the frequencies of the signals transmitted by the low-frequency path and the high-frequency path are different.

2. The duplexer according to claim 1, characterized in that: The impedance of the low frequency path is the same as the impedance of the high frequency path.

3. The duplexer according to claim 1, characterized in that: The low-frequency path includes multiple first capacitor parallel circuits and multiple first inductors connected in sequence, the first end of each first inductor is connected to one first capacitor parallel circuit, and the first capacitor parallel circuit includes multiple capacitors connected in parallel.

4. The duplexer according to claim 3, characterized in that: The number of the first capacitor parallel circuits is the same as the number of the first inductors, and the first end of each first inductor is correspondingly connected to one of the first capacitor parallel circuits.

5. The duplexer according to claim 3, characterized in that: The capacitance values ​​of the capacitors in the same first capacitor parallel circuit are the same, and the capacitance values ​​and the number of capacitors in different first capacitor parallel circuits are the same or different.

6. The duplexer according to claim 3, characterized in that: A first end of a capacitor in each of the first capacitor parallel circuits is connected to the corresponding first inductor, and a second end of the capacitor in the first capacitor parallel circuit is grounded.

7. The duplexer according to claim 1, characterized in that: The high-frequency path includes a second inductor and a plurality of second capacitor parallel circuits connected in sequence, a first end of each second inductor is grounded, and a second end of each second inductor is correspondingly connected to one second capacitor parallel circuit.

8. The duplexer according to claim 7, characterized in that: The number of the second capacitor parallel circuits is the same as the number of the second inductors, and the first end of the capacitor in each second capacitor parallel circuit is correspondingly connected to one second inductor, and the second end of the second inductor is grounded.

9. A broadcasting device, characterized in that: The broadcasting device includes a first shortwave transmitter, a second shortwave transmitter, a transmitting antenna and a duplexer as described in any one of claims 1 to 8, wherein an input end of the duplexer is connected to the first shortwave transmitter and the second shortwave transmitter, and an output end of the duplexer is connected to the transmitting antenna.

10. The broadcasting device according to claim 9, characterized in that The first shortwave transmitter and the second shortwave transmitter have the same power.

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