EVAding Interference: A Hybrid Architecture Approach for Substrate-Integrated Evanescent-Mode Cavity Filters

In today’s crowded RF spectrum, receivers must be highly selective to mitigate any interference, whether intentional or from adjacent channels. The upper part of the C band (4–8 GHz) has been designated for space-to-Earth satellite communications and space exploration [1]. This long-range communication demands sensitive, low-loss receivers that can recover weak signals. Customarily, a tradeoff between size and performance presents itself, which poses a challenge to the microwave community as size is often critical in satellite payloads. Therefore, a compact, radiation-impervious filtering solution is needed.