Ultra wide band bridge based on thick film manufacturing technology

Abstract

The invention provides an ultra wide band bridge based on a thick film manufacturing technology. The ultra wide band bridge comprises a thick film circuit substrate, a coaxial cable, a magnetic core and a capacitor. The ultra wide band bridge is externally provided with three mutually connected ports P1, P2 and P3, wherein the port P1 and the port P3 are two radio frequency ports connected to a resistor power distribution circuit and the port P2 is connected to the unbalanced end of a Balun. When signals are transmitted in a non-inverting mode, the port P1 serves as an input port, and after resistor power distribution, partial power is coupled to the port P3 to be output and partial power is directly output through the port P2. When the signals are transmitted in an inverting mode, the port P2 serves as the input port, the signals are converted by the Balun from being unbalanced to being balanced, two routes of signals which are equal in amplitude and opposite in phase are obtained at the balanced end, the two routes of signals are offset at the port P3 through power distribution circuits respectively, signal isolation is achieved for the port P3, and partial power is directly output through the port P1. By the adoption of the ultra wide band bridge based on the thick film manufacturing technology, the applicable frequency of the directional bridge based on the Balun and the resistor power distribution circuit can be improved to be in a millimeter wave band, a larger working bandwidth can be realized, and the ultra wide band bridge is simple in structure and convenient to integrate.

Description

technical field [0001] The invention belongs to the technical field of signal directional separation, and in particular relates to an ultra-wideband electric bridge based on a thick film fabrication process. Background technique [0002] Signal directional separation technology is a key technology in RF microwave systems and testing and measurement. It is widely used in phase shifting, power synthesis and distribution, power sampling, directional coupling, directional detection, and dynamic monitoring of signal sources. The RF microwave circuits or devices that achieve directional separation of signals are mainly directional couplers and directional bridges. The directional coupler of the typical gradient coupling line can realize the directional separation of signals with high directivity in multiple octaves, but when the frequency is lower than 2GHz, the electrical length is long, and the limited coupling line length is difficult to achieve a relatively flat coupling degre...

AI Technical Summary

Problems solved by technology

It can be seen that the performance of the bridge is greatly affected by the constant-ratio power-dividing characteristics of the power dividing circuit and the Balun balance characteristics

[0004] At present, the resistive power dividing circuit is mainly a PCB printed board or microstrip circuit technology solution based on lumped parameter components, which is difficult to take into account the needs of low-frequency applications of megahertz and below and high-frequency applications above 10GHz

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