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Encapsulation technology for antenna-feeder and waveguide units

Keywords:

A. Yu. Sedakov – Dr.Sc. (Eng.), Director of FSUE FRPC “Measuring System Research Institute n.a. Yu.Ye. Sedakov” (Nizhny Novgorod) V. L. Zephirov – Head of Research Team, FSUE FRPC “Measuring System Research Institute n.a. Yu.Ye. Sedakov” (Nizhny Novgorod). E-mail: vzefirov@niiis.nnov.ru L. A. Khasyanova – Leading Process Engineer, FSUE FRPC “Measuring System Research Institute n.a. Yu.Ye. Sedakov” (Nizhny Novgorod)


Antenna-feeder and waveguide units are integral part of microwave devices. Specific operating conditions for some microwave devices require some measures for dust sealing, moisture protection and vibration protection of such devices. Traditionally waveguide units dust sealing and moisture protection were provided by introducing sealing dielectric partitions (polymer or quartz windows), and devices vibration stability was defined by glue properties (BF-4, VK-9) used for fastening of components (loads, absorbers, adjusting dielectric parts) in antenna units, nonreciprocal and waveguide devices. However, dielectric partitions introduction into the wave-guide trans-mission lines causes inevitably electromagnetic waves reflection effects (as their dielectric constant is higher than 2), units standing wave factor (SWF) increase and device performance degradation as a whole. As concerns the strength of seat member fixture in the waveguide transmission lines and nonreciprocal devices by glue is not always sufficient to meet the requirements to the waveguide units vibration stability and impact loads. The present work proposes an original method of sealing (dust-moisture protection), increasing vibration and impact loads stability for antenna, wave-guide units and HF units by filling them with scrumming PSV-S polystyrene. The method was tested using a radar sensor model. The method was proved to be high-efficient. The material filling the horn antennas cavities does not impair device characteristics and provides its dust and moisture protection.
References:

 

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May 29, 2020

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