Power division chip circuit structure with reconfigurable working mode and working method thereof
By designing a compact three-wire coupled spiral coil and control switch, the problem of switching between power divider and balun circuit modes in RF microwave integrated circuits is solved, realizing equal-amplitude in-phase or equal-amplitude out-of-phase signal output, which is suitable for small-size integrated circuit chip design.
Patent Information
- Application Number
- CN202511173490.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-21
- Publication Date
- 2025-12-19
AI Technical Summary
In existing radio frequency microwave integrated circuits, power dividers and balun circuits cannot simultaneously achieve equal-amplitude output conversion of signals with the same phase and those with opposite phases. Furthermore, the introduction of phase shifters results in large insertion losses and large wideband phase deviations, making them unsuitable for small-size integrated circuit chip design.
The design employs a compact three-wire coupled spiral coil and control switch. By switching the on/off state of the control switch, the two working modes of power division and balun can be switched. By utilizing the connection state changes of the three-wire coupled spiral coil and grounding post, the signal can be output in equal amplitude and in phase or in equal amplitude and out of phase.
The switching between power divider and balun operating modes is achieved in the same compact circuit structure, reducing chip size requirements and ensuring the amplitude consistency and phase difference continuity of the output signal without distortion.
Smart Images
Figure CN121173252A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of radio frequency microwave integrated circuit technology, in particular to a working mode reconfigurable power divider chip circuit structure and a working method thereof. BACKGROUND
[0002] A power divider circuit divides one input signal into two or more output signals and transmits them to different loads, which is widely used in radio frequency microwave systems and circuits. Generally, the amplitudes of the two signals are equal and the phases are the same. In some special applications, when the amplitudes of the two output signals are equal and the phases are opposite, such a circuit structure is called a balun circuit, which is mainly used to convert between differential signals and single-ended signals. It converts unbalanced single-ended signals into two balanced signal components with equal amplitudes and a 180° phase difference, and is widely used in differential amplifiers or mixers and other devices or circuits. The power divider circuit can be realized by Wilkinson and other circuit structures, and the balun circuit can be realized by Marchand and other circuit structures. Power division and balun are two different circuit functions. The two circuits cannot simultaneously realize the equal-amplitude output conversion of signals with the same phase and opposite phase, and cannot realize the switching of power division and balun working modes. At present, in some literature, a tunable phase shifter can be cascaded after the power divider to realize the switching of power division and balun circuits by introducing a phase difference. However, the introduction of the phase shifter will cause problems such as large insertion loss, large wideband phase deviation, and large circuit structure, which is especially not suitable for small-size integrated circuit chip design. SUMMARY
[0003] The present application aims to provide a working mode reconfigurable power divider chip circuit structure and a working method thereof to solve the problems of switching between power division and balun working modes and miniaturization of chip circuits in radio frequency microwave monolithic integrated circuits.
[0004] In one embodiment of the present application, a working mode reconfigurable power divider chip circuit structure includes an input port tap, two output port taps, a three-line coupled spiral coil, a grounding column, and two control switches. One of the input port taps is connected to the middle coil of the three-line coupled spiral coil as an incident signal input port. The two output port taps are connected to the two ends of the outer coil of the three-line coupled spiral coil as output signal output ports. The two ends of the grounding column are connected between the ends of the middle coil of the three-line coupled spiral coil through one control switch respectively. The on-off control states of the two control switches are the same, and are used to switch the working mode of the working mode reconfigurable power divider chip circuit structure.
[0005] As preferred, the working mode reconfigurable power divider chip circuit is a planar circuit structure, and the input port tap, the output port tap, the three-wire coupling spiral coil, the grounding column and the control switch are arranged on a chip substrate.
[0006] As preferred, the control switch is a switch tube.
[0007] The working method of the working mode reconfigurable power divider chip circuit structure comprises the following steps: When the control switch is in the off state, the grounding column and the middle coil of the three-wire coupling spiral coil are not conductive, the end of the middle coil of the three-wire coupling spiral coil is in an open circuit state, and two-way output signals are output in equal amplitude and in phase; When the control switch is in the on state, the grounding column and the middle coil of the three-wire coupling spiral coil are conductive, the end of the middle coil of the three-wire coupling spiral coil is in a short circuit state, and two-way output signals are output in equal amplitude and in opposite phase.
[0008] In another embodiment of the present application, a working mode reconfigurable power divider chip circuit structure comprises two input port taps, one output port tap, a three-wire coupling spiral coil, a grounding column and two control switches; The two input port taps are connected to the two ends of the outer coil of the three-wire coupling spiral coil as incident signal input ports; The output port tap is connected to the middle coil of the three-wire coupling spiral coil as an output signal input port; The two ends of the grounding column are connected between the ends of the middle coil of the three-wire coupling spiral coil through one control switch; The on-off control states of the two control switches are the same, and are used to switch the working mode of the working mode reconfigurable power divider chip circuit structure.
[0009] As preferred, the working mode reconfigurable power divider chip circuit is a planar circuit structure, and the input port tap, the output port tap, the three-wire coupling spiral coil, the grounding column and the control switch are arranged on a chip substrate.
[0010] As preferred, the control switch is a switch tube.
[0011] The working method of the working mode reconfigurable power divider chip circuit structure comprises the following steps: When the control switch is in the off state, the grounding column and the middle coil of the three-wire coupling spiral coil are not conductive, the end of the middle coil of the three-wire coupling spiral coil is in an open circuit state, and two-way input signals are output in equal amplitude and in phase after being synthesized; When the control switch is in the on state, the grounding column and the middle coil of the three-wire coupling spiral coil are conductive, the end of the middle coil of the three-wire coupling spiral coil is in a short circuit state, and two-way input signals are output in equal amplitude and in opposite phase after being synthesized.
[0012] Therefore, by adopting the technical scheme, the application has the following beneficial effects: The application realizes the switching of the power division and the balun two working modes in the same compact circuit structure, and realizes the efficient use of the chip size by switching the on-off state of the control switch, changing the connection state of the three-line coupling spiral coil and the grounding column.
[0013] The working mode reconfigurable power division chip prepared by the application has the following advantages: when in the power division circuit working mode, the amplitude consistency of the two-way output signals is good, the phase difference of the two-way output signals is 0 degrees and continuous without distortion; when in the balun circuit working mode, the amplitude consistency of the two-way output signals is good, the phase difference of the two-way output signals is 180 degrees and continuous without distortion. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 is a schematic diagram of a working mode reconfigurable power division chip circuit structure provided by the embodiment of the application.
[0015] Figure 2 is a power division mode and balun mode amplitude consistency curve diagram of the working mode reconfigurable power division chip circuit in the embodiment of the application.
[0016] Figure 3 is a power division mode S21, S31 phase curve diagram of the working mode reconfigurable power division chip circuit in the embodiment of the application.
[0017] Figure 4 is a balun mode S21, S31 phase curve diagram of the working mode reconfigurable power division chip circuit in the embodiment of the application.
[0018] The drawings show that: 1 is an input port tap, 2 is a first output port tap, 3 is a second output port tap, 4 is a three-line coupling spiral coil, 5 is a grounding column, and 6 is a switch tube. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the application clearer, the technical scheme of the embodiments of the application will be described clearly and completely below in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, not all the embodiments. The components of the embodiments of the application described and shown in the drawings herein can be arranged and designed in various different configurations.
[0020] The following detailed description of embodiments of the application in the drawings provided is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based upon these embodiments of the application, all other embodiments obtained by persons of ordinary skill in the art without having to make creative efforts are within the scope of the application.
[0021] Embodiments As Figure 1 shown, the embodiment of the application provides a working mode reconfigurable power divider chip circuit structure, comprising an input port tap, two output port taps, a three-line coupling spiral coil, a grounding column and two control switches; One of the input port taps is connected with the middle coil of the three-line coupling spiral coil as an incident signal input port; The two output port taps are connected with the two ends of the outer coil of the three-line coupling spiral coil as output signal output ports; The two ends of the grounding column are respectively connected between the ends of the middle coil of the three-line coupling spiral coil through a control switch; The on-off control states of the two control switches are the same, and are used to switch the working mode of the working mode reconfigurable power divider chip circuit structure.
[0022] As preferred, the working mode reconfigurable power divider chip circuit is a planar circuit structure, and the input port tap, the output port tap, the three-line coupling spiral coil, the grounding column and the control switch are arranged on a chip substrate. The control switch can be realized by a switch tube, for example, a PMOS tube or an NMOS tube, and corresponding connection can be made according to the switch tube used.
[0023] The control of the two control switches is as follows: When the control switch is in an off state, the grounding column and the middle coil of the three-line coupling spiral coil are not conductive, the ends of the middle coil of the three-line coupling spiral coil are in an open circuit state, and two-way output signals are output in equal amplitude and in phase; When the control switch is in an on state, the grounding column and the middle coil of the three-line coupling spiral coil are conductive, the ends of the middle coil of the three-line coupling spiral coil are in a short circuit state, and two-way output signals are output in equal amplitude and in opposite phase.
[0024] As can be seen, through the design of the compact three-line coupling circuit, by switching the on-off state of the control switch, the connection state of the three-line coupling spiral coil and the grounding column is changed, in the same compact circuit structure, the switching of the power division and the balun two working modes is realized, and the efficient use of the chip size is realized.
[0025] The following is a specific implementation example: Figure 1This invention demonstrates the reconfigurable power divider chip circuit structure designed using Sanan GaAs ED process, operating in modes from 0.1 GHz to 8 GHz, including an input port tap 1, a first output port tap 2, a second output port tap 3, a three-wire coupled spiral coil 4, a grounding post 5, and two switching transistors 6.
[0026] When the reconfigurable power divider chip circuit structure is in the power divider working mode, the two switching transistors 6 are in a non-conducting state. The incident signal enters the three-wire coupled spiral coil 4 from the input port tap 1. At this time, the three-wire coupled spiral coil 4 and the grounding post 5 are in a non-conducting state. The output signal is output with equal amplitude and in phase from the first output port tap 2 and the second output port tap 3.
[0027] When the reconfigurable power divider chip circuit structure is in balun mode, the two switching transistors 6 are in the on state, and the incident signal enters the three-wire coupled spiral coil 4 from the input port tap 1. At this time, the three-wire coupled spiral coil 4 and the ground post 5 are in the on state, and the output signal is output from the first output port tap 2 and the second output port tap 3 with equal amplitude and inverse phase.
[0028] Figure 2 The amplitude consistency curves of the power divider mode and balun mode of the reconfigurable power divider chip circuit structure in the embodiment of the present invention are shown. It can be seen that when the reconfigurable power divider chip circuit structure operates in power divider mode and balun mode, the amplitude difference between the two output signals is -0.3dB to 1.6dB in the 0.1GHz to 8GHz frequency band, and the amplitude consistency is good.
[0029] Figure 3 The power divider mode transmission characteristics S21 and S31 phase curves of the reconfigurable power divider chip circuit structure in the embodiment of the present invention are shown. The phase difference between the two output signals is 0 degrees and is continuous without distortion.
[0030] Figure 4 The balun mode transmission characteristics S21 and S31 phase curves of the reconfigurable power divider chip circuit structure in the embodiment of the present invention are shown. The phase difference between the two output signals is 180 degrees and is continuous without distortion.
[0031] It should be noted that the above design results are only to demonstrate the effect of the present invention, and further parameter optimization can be used to achieve a wider bandwidth and better amplitude and phase characteristics.
[0032] The working mode reconfigurable power divider chip circuit structure of the present invention can be used as a working mode reconfigurable power divider and balun circuit, or it can be used as a standalone power divider chip and balun chip circuit.
[0033] The above embodiments illustrate the use of one port input and two port outputs. The reconfigurable power divider chip circuit structure of this invention can also be used for power combining with two port inputs and one port output, as described below: A reconfigurable power divider chip circuit structure includes two input port taps, one output port tap, a three-wire coupled spiral coil, a grounding post, and two control switches; The two input port taps are connected to the two ends of the outer coil of the three-wire coupled spiral coil as the incident signal input ports; One of the output port taps is connected to the middle coil of the three-wire coupled helical coil as an output signal input port; The two ends of the grounding post are respectively connected to the ends of the middle coil of the three-wire coupled spiral coil via a control switch; The two control switches have the same on / off control state, used to switch the operating mode of the reconfigurable power divider chip circuit structure, specifically: When the control switch is in the off state, there is no conduction between the grounding post and the intermediate coil of the three-wire coupled spiral coil, and the end of the intermediate coil of the three-wire coupled spiral coil is in an open circuit state. The two incident signals are combined with equal amplitude and phase and then output. When the control switch is in the ON state, the grounding post is connected to the middle coil of the three-wire coupled spiral coil, and the end of the middle coil of the three-wire coupled spiral coil is short-circuited. The two incident signals are combined with equal amplitude and opposite phase and then output.
[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A reconfigurable power divider chip circuit structure, characterized in that, It includes one input port tap, two output port taps, a three-wire coupled spiral coil, a grounding post, and two control switches; One of the input port taps is connected to the middle coil of the three-wire coupled helical coil as the incident signal input port; The two output port taps are connected to the two ends of the outer coil of the three-wire coupled spiral coil as output signal output ports; The two ends of the grounding post are respectively connected to the ends of the middle coil of the three-wire coupled spiral coil via a control switch; The two control switches have the same on / off control state, which is used to switch the working mode of the reconfigurable power divider chip circuit structure.
2. The reconfigurable power divider chip circuit structure according to claim 1, characterized in that, The reconfigurable power divider chip circuit of the described working mode is a planar circuit structure, and the input port tap, output port tap, three-wire coupled spiral coil, grounding post, and control switch are disposed on the chip substrate.
3. The reconfigurable power divider chip circuit structure according to claim 1, characterized in that, The control switch uses a switching transistor.
4. A method for operating a reconfigurable power divider chip circuit structure according to any one of claims 1-3, characterized in that, include: When the control switch is in the off state, there is no continuity between the grounding post and the intermediate coil of the three-wire coupled spiral coil, the end of the intermediate coil of the three-wire coupled spiral coil is in an open circuit state, and the two output signals are output with equal amplitude and phase. When the control switch is in the ON state, the grounding post is connected to the intermediate coil of the three-wire coupled spiral coil, the end of the intermediate coil of the three-wire coupled spiral coil is short-circuited, and the two output signals are output with equal amplitude and opposite phase.
5. A reconfigurable power divider chip circuit structure, characterized in that, It includes two input port taps, one output port tap, a three-wire coupled spiral coil, a grounding post, and two control switches; The two input port taps are connected to the two ends of the outer coil of the three-wire coupled spiral coil as the incident signal input ports; One of the output port taps is connected to the middle coil of the three-wire coupled helical coil as an output signal input port; The two ends of the grounding post are respectively connected to the ends of the middle coil of the three-wire coupled spiral coil via a control switch; The two control switches have the same on / off control state, which is used to switch the working mode of the reconfigurable power divider chip circuit structure.
6. The reconfigurable power divider chip circuit structure according to claim 5, characterized in that, The reconfigurable power divider chip circuit of the described working mode is a planar circuit structure, and the input port tap, output port tap, three-wire coupled spiral coil, grounding post, and control switch are disposed on the chip substrate.
7. The reconfigurable power divider chip circuit structure according to claim 5, characterized in that, The control switch uses a switching transistor.
8. A method for operating a reconfigurable power divider chip circuit structure according to any one of claims 5-7, characterized in that, include: When the control switch is in the off state, there is no conduction between the grounding post and the intermediate coil of the three-wire coupled spiral coil, and the end of the intermediate coil of the three-wire coupled spiral coil is in an open circuit state. The two incident signals are combined with equal amplitude and phase and then output. When the control switch is in the ON state, the grounding post is connected to the middle coil of the three-wire coupled spiral coil, and the end of the middle coil of the three-wire coupled spiral coil is short-circuited. The two incident signals are combined with equal amplitude and opposite phase and then output.