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RF design and implementation of ceramic-filled resin-based 3D printed millimetre-wave bandpass filters (BPFs) using a new class of compact high-quality-factor hemispherical cavity resonators are addressed. Design concept of the hemispherical resonator is discussed for BPF applications in both X and Ka bands. For validation purpose, the Ka-band fourth-order BPF is fabricated with a high-temperature-resistant...
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