20 Gigahertz noise suppressor based on ferromagnetic nanowire arrays

Integrated Microwave Noise Suppressor Fabricated on Magnetic/Dielectric Composite Ceramic Substrate

“…8). In our previous work [17], 200 nm Co and Co-Ni nanowires had an absorption peak at 20-25 GHz, thus it seems that diameter of the nanowires could affect the position of the absorption peak. If we want to increase the magnitude of S 21 , based on our experimental results, the length and diameter of the ferromagnetic nanowires, the distance between the nanowires and the transmission lines and porosity of the AAO template could be the variables.…”

“…After deposition, the coplanar waveguide (CPW) lines were patterned on the AAO substrate filled with 20 nm Co nanowires by photolithography and the fabrication process flow of the noise suppressors was shown in Ref. [17].…”

“…12, where the c-axis (represented by K u ) of HCP Co is parallel to the longitudinal axis of the nanowire, we can derive Eqs. (16)(17) from Eq. ( 12) and Eq.…”

“…However, the noise suppression effects of the Co nanowires with a very small diameter have not been reported. Previously we studied the noise suppressors with 200 nm Co-Ni or Co nanowires [17]. In this paper, we synthesized 20 nm Co nanowires, fabricated the noise suppressors on anodic aluminum oxide (AAO) substrates filled with 20 nm Co nanowires and characterized the microwave properties of these noise suppressors.…”

Spin waves and electromagnetic waves in magnetic nanowires

“…An integrated self-biased planar microwave circuit on nanowire substrates was proposed (Carignan et al, 2009b;Carreón-González et al, 2011;Wang et al, 2012). A 20 GHz noise suppressor was made from nanowires (Li et al, 2011). Band stop filters and phase shifters were designed and fabricated (Hamoir et al, 2012;Sharma et al, 2014a).…”