Broadband two-power divider

Abstract

The utility model provides a broadband power divider. The broadband power divider comprises an output end transmission transformer, an input end impedance conversion transformer, a balance resistor and a compensation capacitor. One end of the input end impedance conversion transformer is a radio frequency input end, and the other end is coupled with one end of the output end transmission transformer; the other end of the output end transmission transformer comprises a first radio frequency output end and a second radio frequency output end; the balancing resistor is connected in parallel between the first radio frequency output end and the second radio frequency output end; one end of the compensation capacitor is coupled with the radio frequency input end, and the other end is grounded. According to the broadband power divider, the problems that in a traditional broadband power divider, due to the fact that large ground capacitance is introduced into an input end balance resistor, the loss amplitude of the radio frequency input end is not uniform, the phase is not balanced, the withstand voltage is reduced, and the overall performance of the divider is reduced in actual manufacturing and using are solved.

Description

Technical Field

[0001] The present application relates to the technical field of power dividers, and in particular to a broadband two-power divider. Background Art

[0002] The traditional broadband power divider includes an input power synthesis transformer, an output impedance transformation transformer, and an input balanced resistor board. The input power synthesis transformer uses the inner conductor and outer conductor of a single RF coaxial cable as the transmission path of the RF input signal, and the input balanced resistor introduces a large capacitance to the ground, which causes uneven loss amplitude and phase imbalance at the RF input in actual production and use, and reduces the withstand voltage, which reduces the overall performance of the divider.

[0003] Currently, there is an urgent need for a broadband two-power divider to solve the problems existing in current technology. Utility Model Content

[0004] The present application provides a broadband power divider, which is used to solve the problem that in traditional broadband power dividers, the input balancing resistor introduces a large capacitance to ground, resulting in uneven loss amplitude and phase imbalance at the RF input end, and reduced withstand voltage, which reduces the overall performance of the divider during actual production and use.

[0005] The present application provides a broadband power distributor, which includes: an output-end transmission transformer, an input-end impedance transformation transformer, a balancing resistor and a compensation capacitor; one end of the input-end impedance transformation transformer is a radio frequency input terminal, and the other end is coupled to one end of the output-end transmission transformer; the other end of the output-end transmission transformer includes a first radio frequency output terminal and a second radio frequency output terminal; the balancing resistor is connected in parallel between the first radio frequency output terminal and the second radio frequency output terminal; one end of the compensation capacitor is coupled to the radio frequency input terminal, and the other end is grounded.

[0006] The present application adopts the above broadband power divider to improve the coverage of the operating frequency, stabilize the impedance and increase the distribution efficiency. At the same time, the structural layout is adopted to keep the amplitude and phase amplitude of each output end consistent.

[0007] Optionally, the transmission path of the output-end transmission transformer is composed of an inner conductor and an outer conductor of two radio frequency coaxial cables.

[0008] Optionally, the outer conductors of the two radio frequency coaxial cables are wound around the magnetic core of the output-end transmission transformer in the same number of turns.

[0009] Optionally, the transmission path of the input impedance transformation transformer is composed of an inner conductor and an outer conductor of a radio frequency coaxial cable.

[0010] Optionally, the inner conductor of the radio frequency coaxial cable is wound around the magnetic core of the input end impedance transformation transformer twice, and the outer conductor of the radio frequency coaxial cable is wound around the magnetic core of the input end impedance transformation transformer once.

[0011] Optionally, the balancing resistor is a beryllium oxide resistor.

[0012] Optionally, the broadband power divider further includes an adjustable capacitor; one end of the adjustable capacitor is coupled to the other end of the input impedance transformation transformer, and the other end of the adjustable capacitor is grounded.

[0013] Optionally, balancing resistors are used to reduce the capacitance to ground of the broadband power divider.

[0014] Compared with the related art, this application can achieve the following beneficial effects:

[0015] 1. This application adopts the above broadband power divider to improve the operating frequency coverage, stabilize the impedance, and increase the distribution efficiency. At the same time, the structural layout is adopted to keep the amplitude and phase amplitude of each output end consistent.

[0016] 2. By using oxide skin resistors as balanced isolation resistors, the capacitance to ground is reduced.

[0017] 4. Compensate for high frequency band indicators by adding compensation capacitors at the RF input end. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the circuit principle of a broadband power divider provided in an embodiment of the present application;

[0019] Figure 2 is a first structural schematic diagram of a broadband power distributor provided in an embodiment of the present application;

[0020] Figure 3 is a second structural schematic diagram of a broadband power distributor provided in an embodiment of the present application;

[0021] Figure 4 It is a schematic diagram of the structural principle of a broadband power divider provided in an embodiment of the present application;

[0022] Reference numerals: T1, output end transmission transformer; T2, input end impedance transformation transformer; R1, balancing resistor; C1, compensation capacitor; C2, second capacitor; C3, adjustable capacitor. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments.

[0024] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected" or "coupled" should be understood in a broad sense. For example, "connected", "connected" or "coupled" may refer to not only physical connection, but also electrical connection or signal connection. For example, it may be directly connected, i.e., physically connected, or indirectly connected through at least one intermediate element, as long as the circuit is connected, or it may be internal connection between two elements; signal connection may refer to signal connection through a media medium, such as radio waves, in addition to signal connection through a circuit. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0025] like Figure 1 As shown, it is a schematic diagram of the circuit principle of a broadband power divider provided in an embodiment of the present application, and the broadband power divider includes: an output end transmission transformer T1, an input end impedance transformation transformer T2, a balancing resistor R1 and a compensation capacitor C1; one end of the input end impedance transformation transformer T2 is the RF input end, and the other end is coupled to one end of the output end transmission transformer T1; the other end of the output end transmission transformer T1 includes a first RF output end and a second RF output end; the balancing resistor R1 is connected in parallel between the first RF output end and the second RF output end; one end of the compensation capacitor C1 is coupled to the RF input end, and the other end is grounded.

[0026] In the embodiment of the present application, the other end of the input impedance transformation transformer T2 is coupled to one end of the second capacitor C2, and the other end of the second capacitor C2 is grounded; the other end of the input impedance transformation transformer T2 is also coupled to one end of the adjustable capacitor C3, and the other end of the adjustable capacitor C3 is grounded.

[0027] In a possible implementation manner, the transmission path of the output-end transmission transformer T1 is composed of an inner conductor and an outer conductor of two radio frequency coaxial cables.

[0028] In the embodiments of the present application, Figure 2 As shown, the transmission path of the output transmission transformer T1 is composed of the inner conductor and the outer conductor of two RF coaxial cables, and each signal passes through the two transmission paths of the inner conductor and the outer conductor of the RF coaxial cable.

[0029] In an embodiment of the present application, the radio frequency coaxial cable is composed of two concentric conductors, namely an inner conductor and an outer conductor, and these two conductors and the shielding layer share the same axis. The inner conductor is usually composed of a thin core wire, and the outer layer is a ring conductor, also known as an outer conductor or a tissue shielding layer. The two conductors are isolated from each other by an insulating material, usually a physically foamed polyethylene isolated copper wire. The outer conductor can be constructed in a variety of ways, such as copper strip molding, welding, tying, or using an aluminum tube structure, or a braided structure. The entire cable is wrapped with a sheath of polyvinyl chloride material.

[0030] In a possible implementation manner, the outer conductors of the two radio frequency coaxial cables of the output-end transmission transformer T1 are wound around the magnetic core of the output-end transmission transformer T1 by the same number of turns.

[0031] In the embodiments of the present application, Figure 2 As shown, the outer conductors of the two RF coaxial cables are wound around the core of the output transmission transformer T1 with the same number of turns. By passing the RF coaxial cable with a double-hole core through the output transmission transformer T1, the number of turns is increased, the inductance of the transformer is increased, and the low-frequency index is compensated.

[0032] In a possible implementation manner, the transmission path of the input impedance transformation transformer T2 is composed of an inner conductor and an outer conductor of a radio frequency coaxial cable.

[0033] In the embodiments of the present application, Figure 3 As shown in the figure, the transmission path of the input impedance transformation transformer T2 is composed of the inner conductor and outer conductor of an RF coaxial cable. The input impedance transformer uses a double-hole magnetic core. The inner conductor and outer conductor of the RF coaxial cable are wrapped around the magnetic ring for one circle, and the inner conductor is then wrapped around the double-hole magnetic ring for one circle. According to the impedance transformation calculation formula 32:22, 9:4 is derived to achieve 2:1 impedance transformation.

[0034] In a possible implementation, the inner conductor of the RF coaxial cable of the input impedance transformation transformer T2 is wrapped around the magnetic core of the input impedance transformation transformer T2 twice, and the outer conductor of the RF coaxial cable is wrapped around the magnetic core of the input impedance transformation transformer T2 once.

[0035] In a possible implementation, the balancing resistor R1 is a beryllium oxide resistor.

[0036] In a possible implementation, the balancing resistor R1 is used to reduce the capacitance of the broadband power divider to ground.

[0037] In a possible implementation, the broadband power divider further includes an adjustable capacitor C3; one end of the adjustable capacitor C3 is coupled to the other end of the input impedance conversion transformer T2, and the other end of the adjustable capacitor C3 is grounded.

[0038] In the embodiments of the present application, Figure 1 As shown, the adjustable capacitor C3 is used to adjust the capacitance to ground at both ends of the input impedance converter, so that the broadband power divider can adaptively adjust the capacitance to ground at both ends of the input impedance converter when the input power changes.

[0039] like Figure 4 , which is a schematic diagram of the structural principle of a broadband power divider provided in an embodiment of the present application.

[0040] This application can achieve the following beneficial effects:

[0041] 1. This application adopts the above broadband power divider to improve the operating frequency coverage, stabilize the impedance, and increase the distribution efficiency. At the same time, the structural layout is adopted to keep the amplitude and phase amplitude of each output end consistent.

[0042] 2. By using oxide skin resistors as balanced isolation resistors, the capacitance to ground is reduced.

[0043] 4. Compensate for high frequency band indicators by adding compensation capacitors at the RF input end.

[0044] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A broadband power divider, characterized in that: The broadband power distributor comprises: an output end transmission transformer (T1), an input end impedance transformation transformer (T2), a balancing resistor (R1) and a compensation capacitor (C1); One end of the input impedance conversion transformer (T2) is a radio frequency input end, and the other end is coupled to one end of the output transmission transformer (T1); The other end of the output transmission transformer (T1) includes a first radio frequency output end and a second radio frequency output end; The balancing resistor (R1) is connected in parallel between the first RF output terminal and the second RF output terminal; One end of the compensation capacitor (C1) is coupled to the radio frequency input end, and the other end is grounded.

2. The broadband power divider according to claim 1, characterized in that: The transmission path of the output end transmission transformer (T1) is composed of an inner conductor and an outer conductor of two radio frequency coaxial cables.

3. The broadband power divider according to claim 2, characterized in that: The outer conductors of the two radio frequency coaxial cables are wound around the magnetic core of the output end transmission transformer (T1) with the same number of turns.

4. The broadband power divider according to claim 1, characterized in that: The transmission path of the input impedance transformation transformer (T2) is composed of an inner conductor and an outer conductor of a radio frequency coaxial cable.

5. The broadband power divider according to claim 4, characterized in that: The inner conductor of the radio frequency coaxial cable is wound around the magnetic core of the input end impedance transformation transformer (T2) twice, and the outer conductor of the radio frequency coaxial cable is wound around the magnetic core of the input end impedance transformation transformer (T2) once.

6. The broadband power divider according to claim 1, characterized in that: The balancing resistor (R1) is a beryllium oxide resistor.

7. The broadband power divider according to claim 1, characterized in that: The broadband power divider also includes an adjustable capacitor (C3); One end of the adjustable capacitor (C3) is coupled to the other end of the input impedance conversion transformer (T2), and the other end of the adjustable capacitor (C3) is grounded.

8. The broadband power divider according to claim 6, characterized in that: The balancing resistor (R1) is used to reduce the capacitance of the broadband power divider to ground.

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