Small-sized wideband power splitter

Abstract

The invention discloses a small-sized wideband power splitter, which comprises two groups of magnetic core transformer windings which are respectively 1:2 impedance transformers and two power splitters, wherein the signal output ends of the 1:2 impedance transformers are signal input ends of the two power splitters; the signal output ends of the 1:2 impedance transformers are connected in parallelwith a capacitance element used for absorbing leakage inductance; an isolation resistor is in span connection between the output ports of the two power splitters. The two ferrite magnetic cores are respectively used as an impedance conversion network and a power distribution network; the impedance matching effect is higher; the insertion loss is smaller; the electromagnetic parameters of the ferrite magnetic core materials meet the complementary relationship; the performance consistency of the power splitter in the board frequency band range is ensured; an impedance converter uses three strands of copper core enamelled wires for winding; by regulating the diameter and length of the winding coil L3 enamelled wires, the voltage standing wave ratio at the signal input port is smaller; the batter impedance matching is realized.

Description

technical field [0001] The invention relates to a power distribution or power synthesis device in the field of radio frequency and microwave engineering, in particular to a miniaturized broadband power divider. Background technique [0002] In radio frequency communication systems, the input power often needs to be transmitted to different circuit loads according to a certain proportion, or the power of different proportions needs to be combined into the same path. Therefore, a power splitter / combiner is often required. Generally speaking, there are three main implementation technologies for power dividers: lumped parameter power divider, microstrip line power divider, waveguide power divider, and transformer power divider based on ferrite core. The lumped parameter power divider circuit is generally used in the case of very low frequency. It is usually composed of lossy components, such as resistors. The loss is relatively large, and the isolation between the ports is limit...

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: To address the problems of large volume, narrow frequency band, and low isolation of microstrip lines and waveguide power dividers / combiners between low-frequency and microwave bands, and for the disclosed power splitter based on magnetic core windings, its impedance matching The high insertion loss and high return loss caused by inconsistency in the broadband range, as well as the problems of unbalanced amplitude and phase, the purpose of the present invention is to provide a transmission line transformer structure with a low voltage standing wave ratio in the broadband range , Smaller insertion loss, higher output isolation, better output signal amplitude and phase balance, one-to-two miniaturized broadband power distribution / combiner

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