67 GHz microwave sparkplug coaxial connector development

67 GHz microwave coaxial connector or known as the 1.85-mm connector is developed for mode-free performance up to 67 GHz. It consists of a few precise machined connector parts stacked up against glass metal seal (GMS), which is soldered down to microcircuit housing body. Possibility of reworking damaged GMS is limited by reliability concerns on the brittle solder-gold IMC layers, resulting in high disposal .This paper details the challenges of designing a new 1.85mm microwave sparkplug coaxial connector, as an alternative replacement for existing non-reworkable connector. New sparkplug connector features, design considerations, material selections, electromagnetic simulation studies and RF measurement verifications will be discussed in this paper.