  Kinetic inductance detectors (KID) have great potential in astronomical
observation, such as searching for exoplanets, because of their low noise, fast
response and photon counting characteristics. In this paper, we present the
design process and simulation results of a microstrip line coupled KIDs array
for near-infrared astronomical observation. Compared with coplanar waveguide
(CPW) feedlines, microstrip feedlines do not require air bridges, which
simplify fabrication process. In the design part, we mainly focus on the
impedance transforming networks, the KID structure, and the frequency crosstalk
simulations. The test array has a total of 104 resonators with 8 rows and 13
columns, which ranges from 4.899~GHz to 6.194~GHz. The pitch size is about
200~$\mu$m and the frequency crosstalk is less than 50~kHz in simulation.
