Abstract
Problems in structure of water load power meter and waveguide assemblies of the communication satellite transponder thermal test. This paper analyzes water load layout and reasons of signal attenuation, and then it proposes an optimization that put water load detached from satellite’s board. To ensure the reason of waveguide signal loss, this paper discusses the internal electromagnetic field distribution and currents on waveguide wall. the result of signal loss value showed that the new optimization can decrease signal attenuation value and shorten the process of crafts implementation.
Highlights
As of March 2016, China put hundreds of satellites in orbit so that ranked the third in the world only preceded by America and Russia
After determining the radio frequency connection and power absorption scheme in the chamber, experimental designer set the cable and waveguide connection mode according to the sub-system of each frequency transponder
The domestic general RF power absorption scheme needs to take into account the water-load
Summary
As of March 2016, China put hundreds of satellites in orbit so that ranked the third in the world only preceded by America and Russia. After determining the radio frequency connection and power absorption scheme in the chamber, experimental designer set the cable and waveguide connection mode according to the sub-system of each frequency transponder. The frequency band absorption scheme mostly adopted water-loads absorption mode for thermal test or connected a high-power attenuation device outside the chamber. The domestic general RF power absorption scheme needs to take into account the water-load. This article compared the measured values of electrical performance in different layouts, and improves the design of waveguides and water-loads. It aims to illustrate the implementation of the new solution and its significant advantages in reducing waveguide length, reducing signal attenuation, and reducing floor weight.
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