Waveguide Coaxial Conversion Device Integrated Filtering

The patent combines the filter function with the waveguide coaxial conversion device by integrating a conductor plate with specific structural features (opening, antenna portion, short-circuit portions) that simultaneously perform signal conversion and frequency filtering. This merging eliminates the need for separate filter components while maintaining both conversion and filtering functions.

The conductor plate serves multiple functions: it acts as part of the waveguide structure, provides impedance transformation for signal conversion, and simultaneously functions as a filter element through its specific geometry (opening shape, antenna portion length, short-circuit portions) that creates frequency-selective characteristics. This multi-functionality reduces overall device complexity and size.

The waveguide structure is segmented into two parts: the first member contains a waveguide formed to full depth for optimal signal transmission, while the second member contains only a partial waveguide that does not fully penetrate. This segmentation allows the first member to handle the critical signal transmission function while the second member provides structural support and houses the conductor plate, reducing overall structural complexity.

Different regions of the device are assigned different waveguide depths based on their specific functions. The first member has a full-depth waveguide where signal transmission is critical, while the second member has a partial-depth waveguide where structural support and conductor plate integration are more important. This local differentiation optimizes both transmission and structural properties.