CN-122026045-A - Reconfigurable unequal power distributor based on switch switching

CN122026045ACN 122026045 ACN122026045 ACN 122026045ACN-122026045-A

Abstract

The invention relates to the technical field of microwave and radio frequency circuits, in particular to a reconfigurable unequal power divider based on switch switching. The high-power branch circuit comprises a high-power branch circuit, a low-power branch circuit and an isolation network, wherein one end of the high-power branch circuit is connected with an input port, the other end of the high-power branch circuit is connected with a high-power output port, one end of the low-power branch circuit is connected with the input port, the other end of the low-power branch circuit is connected with the low-power output port, one end of the isolation network is connected with the high-power branch circuit, and the other end of the isolation network is connected with the low-power branch circuit. The invention can reconstruct the power divider circuit into preset different power distribution ratio states by regulating and controlling the switch state, effectively improve the isolation between two output ports and optimize the impedance matching performance under the odd mode excitation condition.

Inventors

LIU LIHENG
Zhang Qianran
YANG JIAHAO
WANG FANGKAI
WANG XUDONG

Assignees

南开大学

Dates

Publication Date: 20260512
Application Date: 20251226

Claims (9)

1. The reconfigurable unequal power divider based on switch switching is characterized by comprising a high-power branch, a low-power branch and an isolation network; the high-power branch circuit comprises a first lumped parameter network of the high-power branch circuit and a second lumped parameter network of the high-power branch circuit; The low-power branch comprises a first lumped parameter network of the low-power branch and a second lumped parameter network of the low-power branch; The high-power branch first lumped parameter network, the high-power branch second lumped parameter network, the low-power branch first lumped parameter network and the low-power branch second lumped parameter network adopt a topological structure internally comprising a switching element; One end of the first lumped parameter network of the high-power branch is connected with an input port; The other end of the first lumped parameter network of the high-power branch is connected with one end of the second lumped parameter network of the high-power branch; the other end of the second lumped parameter network of the high-power branch is connected with a high-power output port; One end of the first lumped parameter network of the low-power branch is connected with an input port; The other end of the first lumped parameter network of the low-power branch is connected with one end of the second lumped parameter network of the low-power branch; The other end of the second lumped parameter network of the low-power branch is connected with a low-power output port; One end of the isolation network is connected with one end of the second lumped parameter network of the high-power branch circuit; And the other end of the isolation network is connected with one end of the second lumped parameter network of the low-power branch.
2. The reconfigurable unequal power splitter based on switching of claim 1, wherein the isolation network is a parallel combination of an isolation resistor and an isolation capacitor, the isolation network adopts a structure internally comprising a switching element, and the isolation network is used for ensuring isolation between output ports and improving impedance matching performance of a circuit.
3. The reconfigurable unequal power splitter based on switching of claim 2, wherein the isolation network comprises at least two branches arranged in parallel, one branch is formed by connecting an isolation capacitor and an isolation switch in series, and the other branch is formed by connecting an isolation resistor and the isolation switch in parallel and then connecting the isolation resistor in series.
4. The reconfigurable unequal power splitter based on switching of claim 1, wherein the topology is any one of PI-type structure, T-coil type structure, or LC structure.
5. The reconfigurable unequal power splitter based on switching of claim 1, wherein the topology controls the on and off states of the controlled switches by a single or multi-bit control signal, changing the equivalent circuit topology and impedance characteristics of the topology, and enabling the power split ratio between the output ports to be switched in at least two unequal proportions.
6. The reconfigurable unequal power splitter of claim 1, wherein the topology comprises a capacitive element disposed between one end of an inductive element in the signal path and ground, at least one ground leg formed by a capacitor in series with the switch, and at least one series network formed by an inductor in parallel with the switch.
7. A reconfigurable unequal power splitter based on switching according to claim 5 wherein the at least two unequal ratios comprise all ratios from one all-pass another off to two-pass power splitting being the same.
8. The reconfigurable unequal power splitter based on switching of claim 7, wherein the high power branch second lumped parameter network comprises at least one ground branch having a resistor in series with the switch, a series switching element disposed on the signal path when one of the paths is all-pass and the other path is off; the low-power branch second lumped parameter network at least comprises a grounding branch with a resistor connected with the switch in series and a series switching element arranged on the signal path.
9. The reconfigurable unequal power splitter based on switching of claim 1, wherein the physical implementation of the inductor, capacitor, resistor and switching elements in the topology employs a combination of one or more of any form of surface mount technology discrete components, monolithic microwave integrated circuit processes, planarization structures in low temperature co-fired ceramic processes.

Description

Reconfigurable unequal power distributor based on switch switching Technical Field The invention relates to the technical field of microwave and radio frequency circuits, in particular to a reconfigurable unequal power divider based on switch switching. Background The microwave power divider is an indispensable key passive device in the radio frequency front-end system, and the core function of the microwave power divider is to efficiently and reliably divide an input microwave signal into two or more output ports according to a given proportion, so that the characteristic plays a crucial role in phased array radars, modern multi-antenna communication systems and precise microwave measurement equipment. In the prior art, a traditional power divider, whether a classical aliquoting structure or an aliquoting structure designed for a specific scene, is fixed in power dividing ratio once the physical design is determined, and lacks the possibility of dynamic adjustment in an application site. However, with the rapid development of wireless communication technologies, especially the increasing demand for intelligent radio frequency resource management in 5G and future communication systems, the system often needs to dynamically adjust the signal energy allocation scheme according to real-time user distribution, drastic changes in channel state, and different power consumption management strategies. To overcome the limitations of fixed power distribution ratios, the technical community has also explored. A more intuitive approach is to combine multiple power splitters with fixed splitting ratios with a complex single pole, multiple throw switching network, with switching to select different signal paths. However, the drawbacks of this approach are evident in that it results in an abnormally complex system architecture, a significant accumulation of insertion loss, and takes up valuable circuit board area. Another technical route is to employ tunable circuits based on semiconductor devices such as varactors or PIN diodes, with continuous adjustment of circuit parameters by varying the bias voltage. While such schemes provide continuously tunable flexibility, they are often accompanied by a series of inherent problems of limited power handling capability, significant nonlinear distortion effects, the need for additional and complex bias and control circuitry, and the like. In addition, the power divider based on the distributed parameter theory such as microstrip line and strip line design, which is commonly used conventionally, has excellent performance in a higher frequency band, but its physical size is generally proportional to the operating wavelength, so that the size of the power divider is too large in a lower microwave frequency band, and it is difficult to adapt to the urgent requirements of the current radio frequency system on miniaturization and high integration of devices. In summary, there is an obvious gap in the prior art, that is, there is a lack of a reconfigurable unequal power divider capable of achieving both compactness, fast switching capability and control simplicity, and maintaining excellent port matching and high isolation performance in various operating states. Disclosure of Invention The present invention is directed to solving at least one of the technical problems existing in the related art. Therefore, the reconfigurable unequal power divider based on switch switching provided by the invention can effectively improve the isolation between two output ports in different power distribution states and optimize the impedance matching performance under the odd-mode excitation condition. The invention provides a reconfigurable unequal power divider based on switch switching, which comprises a high-power branch, a low-power branch and an isolation network, wherein the high-power branch is connected with the low-power branch; the high-power branch circuit comprises a first lumped parameter network of the high-power branch circuit and a second lumped parameter network of the high-power branch circuit; The low-power branch comprises a first lumped parameter network of the low-power branch and a second lumped parameter network of the low-power branch; The high-power branch first lumped parameter network, the high-power branch second lumped parameter network, the low-power branch first lumped parameter network and the low-power branch second lumped parameter network adopt a topological structure internally comprising a switching element; One end of the first lumped parameter network of the high-power branch is connected with an input port; The other end of the first lumped parameter network of the high-power branch is connected with one end of the second lumped parameter network of the high-power branch; the other end of the second lumped parameter network of the high-power branch is connected with a high-power output port; One end of the first lumped parameter network of the low-power branch i