Planar multi-stage power divider

Abstract

A planar multi-stage power divider comprises multiple radio frequency transmission lines composed of a metal strap line and a metal plate, wherein the metal strap line of each radio frequency transmission line comprises a lumped input port and K layers of ring strap lines surrounding the lumped input port, the connection between each lumped input port and the corresponding innermost-layer ring strap line and the connection between the ring strap lines are achieved through Y connection strap lines, the outermost-layer ring strap line of each radio frequency transmission line is connected with X output ports through X output strap lines extending outwards, and an isolation resistor is connected between every two adjacent output strap liens through a resistor connection strap line, wherein X is larger than or equal to 3, Y is larger than or equal to 5 and K is larger than or equal to 2. A plane of the power divider has multiple ports and is miniaturized, the flexibility of the X output ports is high, the bandwidth of the power divider is obviously increased through arrangement of the K layers of ring strap lines around each lumped input port, the isolation degree between the ports is good, and the power divider is easy to process and obtain and has good engineering practical value.

Description

technical field [0001] The invention belongs to the field of radio frequency passive device manufacture, and in particular relates to a planar multistage power divider that can be applied to array antennas of various shapes. Background technique [0002] A power divider, as the name implies, distributes the power of the input port to multiple output port RF passive devices. There are two main implementation schemes for the power divider used in the antenna array. The first scheme is to use the power divider cascading method. For example, for a four-element array antenna, the feed network can use a one-to-two power divider Realization, that is, each output port of a one-to-two power divider is connected to a one-to-two power divider, so as to realize the purpose of one-to-four. The second solution is to use a non-cascaded power divider, that is, to directly implement a one-to-four power divider. For antenna arrays with a large number of array elements, if the cascading sche...

AI Technical Summary

Problems solved by technology

This solution mainly improves the isolation between ports, but as the number of ports N increases, the characteristic impedance of N parallel strip lines will increase to achieve impedance matching, resulting in thinner and thinner microstrip lines. The process is difficult to process or the processing error has a great influence on the performance

This makes the number of output ports N of the scheme limited to a certain extent, which affects the further improvement of isolation

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