High-T_c Superconducting Filters for Wireless Communication

Superconducting microwave devices can realize future wireless communication systems with higher selectivity, higher sensitivity and smaller power consumption. We firstly fabricated microwave bandpass filters of a high-temperature superconducting oxide NdBa₂Cu₃O₇, which is superior to the widely-used superconductor YBa₂Cu₃O₇ in various properties including the superconducting transition temperature T_c and the surface resistance R_s. The filters were fabricated using high-quality films obtained by NTT-original thin film-growth technique for molecular-beam epitaxy (MBE) of high-T_c superconducting oxides. Improving the performance of the new filters, we may realize application of superconducting filters for transmitting parts in wireless systems, which is supposed to give remarkable reduction in size and power consumption of the systems.

---

[back]　[Top]　[Next]