Terminal connection feed-backward type rectangular waveguide-microstrip transition device

Abstract

The invention discloses a terminal connection feed-backward type rectangular waveguide-microstrip transition device, comprising a rectangular waveguide, a height reduction rectangular waveguide, a transition window, a microstrip line conduction band, a microstrip medium substrate, a microstrip plate large-area ground layer and a microstrip transmission line cavity block. The microstrip medium substrate consists of a waveguide side substrate, a connection section substrate and a transmission side substrate; the top of the microstrip medium substrate is provided with the microstrip line conduction band; the microstrip medium substrate and the microstrip line conduction band are combined into a microstrip probe plate; the bottom of the microstrip probe plate is provided with the microstrip plate large-area ground layer; one end of the microstrip probe plate is connected to a rectangular waveguide through the height reduction rectangular waveguide; and the top of the other end of the microstrip probe plate is provided with a microstrip transmission line cavity block. The terminal connection feed-backward type rectangular waveguide-microstrip transition device is small in volume, compact in structure and easy to implement. The length size of the slotting window in the transition section is inversely proportional to a central working frequency of the system and satisfies various working frequency bands of the W wave band.

Description

Technical field [0001] The present invention belongs to the field of millimeter wave hybrid integrated circuit technology, which involves a conversion circuit between a millimeter wave rectangular wave guide and the micro-band, especially a rectangular wave guide-micro-band transition device based on the principle of magnetic couplingEssence Background technique [0002] Due to the characteristics of large power capacity, no radiation loss, and high Q value, the rectangular waveguide has become an important transmission medium for microwave millimeter wave bands. As a microwave hybrid integrated circuit and microwave single -chip integrated circuit baseLight weight, frequency bandwidth, high reliability, low manufacturing costs, and miniaturization and integration of micro -band circuits are also a very important graphic transmission line in the application of millimeter -wave circuit.With the rapid development and application of the W -band single -chip integrated circuit in the...

AI Technical Summary

Problems solved by technology

The circuits are all based on electric field excitation. Although the waveguide-ridge waveguide-microstrip transition is a simple structure with good transition characteristics, it requires high machining accuracy and is difficult to achieve in the W-band.

The waveguide-to-ridge-fin line-microstrip transition may resonate in the metal-free area below the gradual change in the working frequency band. If a certain resonant frequency just falls into the working bandwidth of the device connected to it, it may cause it to couple to the device, thereby Affects the performance of the device, which complicates its design and limits its application

The coupling probe transition is developed from the coaxial probe. This structure can obtain smaller insertion loss and input standing wave ratio in a wider frequency range. It is currently the main transition mode in the W-band, but its waveguide and microstrip The transmission direction is vertical, it is an orthogonal transition structure, the overall size is large, the structure is not compact enough, and it is difficult to meet the requirements of the miniaturized system structure

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