Broadband one-to-five microstrip circuit

Abstract

The invention relates to a broadband one-to-five power divider / synthesizer for a hybrid circuit. According to the broadband one-to-five power divider / synthesizer, a circuit board is arranged in an aluminum shielding box; the top layer of the circuit board comprises an input port circuit, a transmission line circuit, five output port circuits and a large-area grounding circuit; the middle of the circuit board is a dielectric layer; the bottom layer of the circuit board comprises a transmission line circuit and a large-area grounding circuit; and a transmission line circuit comprises a one-to-two non-equally-divided power divider with a power ratio of 3: 2, a one-to-three power divider and a one-to-two power divider, wherein the output impedance of the one-to-two non-equally-divided power divider is 40.8 ohm and 61.2 ohm, and the one-to-two non-equally-divided power divider is separately connected with the one-to-three power divider and the one-to-two power divider. According to the invention, the transmission line circuit adopts two different forms of conventional coplanar waveguide and grounded coplanar waveguide, and various hybrid circuits are formed through different combination modes. By controlling three variables, namely transmission line width, transmission line length and slot width of the coplanar waveguide, the impedance, amplitude and phase of each circuit section in the circuit are respectively designed on the basis of overall design, and the indexes of low loss, equal output power, high isolation, high phase consistency, larger power bearing and the like of the broadband one-to-five power divider are realized.

Description

Technical field [0001] The present invention relates to the field of microwave technology, and more particularly to a broadband one-minute five microstrip circuit. Background technique [0002] At present, common broadband one-five-five-strokes, mainstream is Wilkinson multi-section micropro-belt circuit form, and the structure is: the input "5" is connected to the power ratio 2: 3 qi. "3" output is 60% (- 2.21dB) links to a three-point three-pin (20% * 3 ports = 60%). "2" output is 40% (- 3.98dB) links to a branch of two-secondary (20% * 2 ports = 40%). [0003] There is a problem that the power ratio 3: 2 broadband does not equal the power of "2" branch and broadband one-point three-pin, high impedance, micro-band transmission line finer, spatial coupling strength, The conductor loss is large, the power is small, and the high impedance transmission line is very affected by the low impedance transmission line and the isolation resistance. The high frequency loss of the wideband ...

AI Technical Summary

Problems solved by technology

[0003] The existing problem is: power ratio 3:2 broadband unequal power divider power is "2" branch road and the pre-stage of broadband one-point-three power divider, high impedance, thin microstrip transmission line, strong spatial coupling, The conductor loss is large, the power withstand is small, etc.; in addition, the high-impedance transmission line is greatly affected by the distribution parameters of the low-impedance transmission line and the isolation resistance, and the high-frequency loss of the broadband circuit increases, resulting in large fluctuations in the band; the power ratio is 3:2. The output of the equal power divider needs to be transformed to 50 ohms first, and then connected to other circuits, the number of circuit nodes increases, the loss increases, and the matching also deteriorates; it is difficult for the microstrip circuit to achieve two Two jumpers, choose two isolation resistor schemes, one-point three-power divider output two ports and four ports, the isolation is poor; the existing circuit structure is asymmetrical, the phase error of the five-way output is large, the amplitude error is large, and the phase needs to be increased circuit, loss

The existing microstrip circuit one-point five-power divider cannot solve the problem of circuit amplitude balance and phase balance at the same time, nor can it realize the low loss of the transmission circuit

[0004] The overall cascade design of the circuit has the advantages of less nodes, small overall size, good port standing wave ratio, wide matching bandwidth, etc., and the characteristics of high transmission line impedance in the circuit. The overall cascade design of the microstrip circuit one-point five-power splitter circuit , the loss will increase greatly, and it is not easy to adopt under normal circumstances

[0005] There are also very few applications of broadband one-to-five power splitters in the form of other transmission lines. Compared with microstrip circuit power splitters, it is more difficult and expensive to process. It is also impossible to directly solder components to the circuit layer, and it is difficult to debug circuits and components.

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