Broadband Characterization Of Low Dielectric Constant And Low Dielectric Loss Cytuf(Tm) Cyanate Ester Printed Circuit Board Material

Dielectric constant epsilon(r) and broadband dielectric loss tan delta measurements were performed for the thermoplastic toughened cyanate ester printed circuit board CYTUF(TM) material, Characterization of tan delta over the 1-8 GHz frequency range was made using a simple short-pulse propagation technique, All the measurements were taken on four-metal-layer, 23 x 36 cm cards with representative transmission line structures, It was found the epsilon(r) = 3.48 - 3.64 and tan delta = 0.0095 - 0.01, which are much lower than for standard FR-4 material, The impact of improved characteristics on wireability is analyzed through simulations of representative printed circuit board interconnections.