This paper presents a design of 1-THz imaging detectors implemented in 180-nm standard CMOS process. Device simulator is adopted to simulate the performances of the detectors and the results are well consistent with the theoretical predictions. An on-chip patch antenna is designed aided by HFSS. The simulated peak directivity and gain of antenna are 6.9dBi and 4.4dBi, respectively. The -10dB impedance bandwidth of the antenna is 28 GHz, which corresponds to 2.8% relative bandwidth. To improve power transfer efficiency, we extract the input impedance of the MOSFET and design a matching network inserted between the MOSFET and antenna. Imaging pixels have been arranged in a 3 x 5 array in 180-nm standard CMOS process.