A Power Distribution and Combiner Based on UWB Coaxial Impedance Transformer

Abstract

The invention discloses a power distribution and combination machine based on an ultra wide band coaxial impedance transformer. The power combination machine comprises a one-to-four coaxial impedance transformer, outputs of the one-to-four coaxial impedance transformer are a first output circuit and a second output circuit, the first output circuit and the second output circuit are each connected with a one-to-one coaxial impedance transformer, the one-to-four coaxial impedance transformer is connected with the one-to-one coaxial impedance transformers in series, and power distribution of four circuits is achieved; after the power distribution is carried out on the four circuits, each circuit is connected to a coaxial line coaxial balun with an alpha characteristic impedance, each coaxial balun is connected with a push-pull amplifier, and combination of four stages of push-pull output power is achieved; or after the power distribution is carried out on the four circuits, the circuits are connected to coaxial line coaxial baluns Z1 which are matched with output impedance of the one-to-one coaxial impedance transformers and have the same characteristic impedance; each coaxial balun Z1 is distributed into two circuits of constant amplitude inversion signals by the power distribution; each circuit of each coaxial balun Z1 is distributed into two circuits, and finally combined output is carried out through coaxial baluns Z2 which has the same structure with the coaxial baluns Z1.

Description

technical field [0001] The invention belongs to the field of power combiners, in particular to a power distribution and combiner based on an ultra-wideband coaxial impedance converter. Background technique [0002] Power amplifiers are widely used in the fields of industrial processing, radar, guidance and communication, etc., and higher and higher requirements are put forward for the bandwidth, gain and output power of power amplifiers. For example: in the 500KHz-3GHz frequency band, for the solid-state power amplifier chip whose port impedance is not internally matched to 50 ohms, the power synthesis mostly uses a coaxial balun combined with a microstrip matching push-pull output, but it is limited to the first-stage push-pull output. For a solid-state power amplifier chip whose port impedance is matched to 50 ohms, the microstrip power division and synthesis scheme has a large structure and large loss, and it is not easy to miniaturize the module and increase the output p...

AI Technical Summary

Problems solved by technology

The traditional planar microstrip line power division and synthesis scheme has the advantages of simple structure, easy fabrication and convenient integration with circuits, but in the frequency band of 500KHz-3GHz, due to the low frequency and ultra-wideband, the overall structure size of microstrip power division and synthesis It is not easy to miniaturize the module, and the large structure size brings large radio frequency loss, which greatly reduces the output power

The coaxial balun power division and synthesis scheme realizes four-way synthesis as a whole. There is no microstrip matching in the whole process, which greatly reduces the structure size and radio frequency loss, but the number of channels is limited to four.

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