Abstract: Aiming at the needs of Loran-C to receive radio navigation signals, a high-performance Loran-C small active receiving antenna is studied, which can greatly facilitate the use of Loran-C navigation receivers. It is of high practical significance to reduce the volume of the antenna to reduce the difficulty of installation. The main body of the antenna adopts a magnetic rod coil antenna to receive the Loran-C signal in the long-wave band. The front-end signal conditioning circuit including amplifier circuit, band-pass filter circuit, differential output circuit and power supply circuit is designed to increase signal sensitivity and signal-to-noise ratio; an integrated antenna structure is designed for engineering application. Simulations show that the antenna can efficiently receive Loran-C signals. It can amplify the weak Loran-C signal and filter out out-of-band noise, and the signal strength and signal-to-noise ratio meet the requirements. The antenna has the characteristics of small size, high sensitivity and convenient use, and can be used in Loran-C radio navigation, combined Navigation, additional secondary phase delay calculation and other scenarios.