  We present a multi-chroic kinetic inductance detector (KID) pixel design
integrated with a broadband hierarchical phased-array antenna. Each
low-frequency pixel consists of four high-frequency pixels. Four passbands are
designed from 125 to 365 GHz according to the atmospheric windows. The lumped
element KIDs consist of 100-nm thick AlMn inductors and Nb parallel plate
capacitors with hydrogenated amorphous Si dielectric. Two different coupling
structures are designed to couple millimeter-wave from microstrip lines to
KIDs. The KID designs are optimized for a 10-m-class telescope at a high, dry
site, for example, the Leighton Chajnantor Telescope. Preliminary measurement
results using Al KIDs are discussed.
