K-waveband dielectric disk-loaded circular waveguide feed filter

Abstract

The invention relates to a K-waveband dielectric disk-loaded circular waveguide feed filter (1) for a physical position measurement radar system, comprising a circular waveguide (4) which connects an antenna and a microwave circuit and two dielectric disks (3) which are loaded in the circular waveguide (4), the electromagnetic wave transmission mode in the circular waveguide (4) is TE11 mode, thetwo dielectric disks (3) loaded in the circular waveguide are processed by a commercial microwave substrate (2), the microwave substrate (2) etches the circular dielectric disks (3) through the pattern plating etching method, and a series of metal through holes (5) which surround the dielectric disks are processed on the outer rings of the dielectric disks, thereby forming an equivalent circular waveguide wall. The K-waveband dielectric disk-loaded circular waveguide feed filter can directly use the microwave substrate with high dielectric constant and good thermal resistance, the processing of the parts is very simple and the cost is low. As the dielectric disks in the filter have thin thickness, less loss and good matching performance, the insertion loss of the feed filter in the workingband is less than 0.1dB. In addition, as the dielectric disks are solid structures and have good dust-proof and thermal insulating performances, the feed filter can effectively protect a microwave circuit part of the radar system.

Description

technical field [0001] The invention relates to a dielectric diaphragm-loaded circular waveguide feed filter working in the K-band, which can pass microwave signals of a certain frequency and suppress microwave signals outside the designed frequency range, and is mainly used in level measurement radar systems. Isolated wave-transparent feeder. Background technique [0002] Microwave passive filter is an important device in microwave and millimeter-wave radar systems, and its performance often directly affects the quality of the entire system. In recent years, with the rapid development of microwave and millimeter wave technology, the demand for such devices in the fields of microwave, millimeter wave communication, microwave navigation, guidance, telemetry and remote control, satellite communication and military electronic countermeasures has been increasing. At present, there are waveguide filters, coaxial line filters, stripline filters, microstrip line filters, etc. acco...

AI Technical Summary

Problems solved by technology

However, since the dielectric film hole filter needs to open a certain size hole on the loaded dielectric film to achieve resonance characteristics, it cannot meet the mechanical isolation requirements of the microwave circuit in the radar system and the radar antenna placed in the working environment.

In harsh working environments, dust, heat, and corrosive gases will easily enter the subsequent microwave circuit through the die hole of the waveguide filter, thus affecting the performance of the entire system

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