X-band 3D meander stripline delay line using multilayer LTCC

Two kinds of multilayer low-temperature co-fired ceramic (LTCC) delay lines (approximate 8λ<inf>g</inf> and 1λ<inf>g</inf> at 9.5GHz), using 3D meander stripline, are proposed in this paper. Measurement results in the whole band (9∼10GHz) show that, besides low VSWR, low time dispersion can be achieved as ≤ ±0.002ns for 8λ<inf>g</inf> delay line and ≤ ±0.001ns for 1λ<inf>g</inf> delay line. This technology can also obtain more compact size than other technologies, as 5mm×7mm×2.37mm for 8λ<inf>g</inf> delay line and 2mm×3mm×2.37mm for 1λ<inf>g</inf> delay line.