On-Chip Miniaturized Triplexer Using Lumped Networks With Dual Resonators on an Integrated Passive Device Process

By utilizing lumped coplanar waveguide elements, an on-chip miniaturized triplexer on glass-based integrated passive device (GIPD) process is investigated. Each transmission channel is composed of two parallel LC resonators and an appended L-section network connected in cascade. While the resonators making the path resemble an open circuit at designated frequencies (transmission zeroes), the appended L-section helps create a 50- Ω transmission channel in the third band. In light of this unique approach, the proposed triplexer requires no matching section and features an extremely compact size. According to the experimental results, this on-chip triplexer, while still keeping good in-band/out-of-band performance, is less than one-third the size of the second smallest one in the literature.