A Three-Port Microstrip Power Splitter with Arbitrary Power Split Ratio and Phase Output Characteristics

Abstract

The invention discloses a three-port micro-strip power divider with arbitrary power division ratio and phase position output characteristics, and relates to the technical field of microwave. The micro-strip power divider is provided with an input port, a first output port and a second output port, and comprises eight transmission lines; a lumped element is connected in series with the transmission line between the input port and the first output port; a lumped element is connected in parallel with the transmission line between the input port and the second output port; the transmission line between the input port and the first output port and the transmission line between the input port and the second output port are isolated from each other through an isolating element. Through the arrangement of the appropriate lumped elements on the transmission lines, the characteristic impedance of the transmission lines can be designed flexibly, so that the arbitrary power division ratio and the phase position output characteristics of the two output ports are achieved, the difficult problem of the construction of the power divider with large power division ratio is solved, and in addition, the high isolation between the small circuit and the output ports is achieved. The three-port micro-strip power divider can be used in an antenna feed network and other functional circuit modules in a radio frequency communication system.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a high-isolation three-port microstrip power divider with arbitrary power division ratio and phase output characteristics. Background technique [0002] As one of the indispensable key components in modern communication systems, power splitters are widely used in circuit modules such as antenna feed networks, power combiners, and mixers. In 1960, Wilkinson proposed a structure capable of equal-amplitude and same-phase power distribution. The principle of this structure is clear, the design parameters are simple and clear, and the isolation between output ports is high. It is widely used in microwave circuits. In recent years, with the continuous development of wireless communication systems, there are more and more functional requirements for power splitters, and higher and higher performance requirements, and unequal power splitters with high power ratio output ha...

AI Technical Summary

Problems solved by technology

Due to the loading of multiple stubs, the circuit size is large and it is difficult to meet the miniaturization requirements

[0006] At present, the methods to achieve high power division ratio mainly include periodic loading, double transmission line structure, defect ground structure, multi-layer technology, etc., but these methods still require transmission lines with high characteristic impedance, and at the same time do not realize the miniaturization of the circuit

Images