Four way filtering-type power divider based on three-line coupling structures

Abstract

The invention discloses a four way filtering-type power divider based on three-line coupling structures, which relates to a microwave passive device. Five input and output feeder lines are composed of microstrip lines; the microstrip lines are serially connected with a step impedance structure, two vertically-symmetrical branches are divided, and each branch is composed of a three-line coupling structure, a metallized through hole grounding structure, a bent microstrip line, a two-way power dividing structure, an isolation resistor connected between the two three-line coupling structures and two isolation resistors connected in the two-way power dividing structure; the step impedance structure comprises two rectangular microstrip lines with different characteristic impedance serially connected in the circuit; the three-line coupling structure comprises three microstrip lines with the same width; the three microstrip lines are mutually parallel with the same gaps; the tail end of the middle microstrip line in the three-line coupling structure is connected with the metallized through hole grounding structure; the bent microstrip line is connected at one end of the three-line coupling structure; and the two-way power dividing structure comprises two branch microstrip lines in parallel connection onto the bent microstrip line and an isolation resistor connected between the tail ends of the two microstrip lines.

Description

technical field [0001] The invention relates to a microwave passive device, in particular to a four-way filter type power splitter based on a three-wire coupling structure. Background technique [0002] In recent years, with the rapid development of microwave and radio frequency technology, microwave circuits with the advantages of high-quality signal transmission and integration and miniaturization have become more and more popular ([1] D.M. Pozar, Microwave Engineering, third edition. NewYork, NY, USA: Wiley, 2005). The power splitter has the functions of signal separation and synthesis, and is widely used in some microwave and radio frequency circuits, such as power combining systems, array antennas, mixers and frequency multipliers, etc. Filters have the ability to filter out unwanted signals, so they are also widely used in radio frequency microwave circuits ([2] G.L.Matthaei, L.Young, and E.M.T.Jones, Microwave filters, impedance-matching networks, and coupling struct...

AI Technical Summary

Problems solved by technology

Of course, this theory is not very mature. Many power dividers of this type are often designed with a large volume and the isolation is not very good.

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