Abstract: The present invention relates to a carrier for supporting a catalyst for a spacecraft thruster and to a method for preparing the same, and more particularly, to a catalyst carrier for a spacecraft thruster and method for preparing the same, in which the diameter and distribution of pores of the carrier are controlled using a pore inducing material to lengthen the life of the catalyst.

Abstract: An apparatus and method for removing a transmission leakage signal are provided. The apparatus includes: a directional coupler connecting an antenna to a transmission path and a reception path; and a reflection coefficient adjustment unit outputting a reflection signal to the reception path, the reflection signal having the same amplitude as and opposite phase to a first transmission leakage signal generated from the transmission path and input to the reception path and a second transmission leakage signal reflected by the antenna and input to the reception path.

Abstract: The present invention relates to a carrier for supporting a catalyst for a spacecraft thruster and to a method for preparing the same, and more particularly, to a catalyst carrier for a spacecraft thruster and method for preparing the same, in which the diameter and distribution of pores of the carrier are controlled using a pore inducing material to lengthen the life of the catalyst.

Abstract: A transceiver is provided. The transceiver includes a transmission portion which generates a transmission signal; an antenna which transmits the transmission signal and receives a reception signal; a signal division element which receives the transmission signal from the transmission portion and inputs the received transmission signal to the antenna for transmission, and receives the reception signal received by the antenna; an extraction signal adjusting portion which extracts the transmission signal from the signal division element, and adjusts a phase of the extracted signal to generate an output signal; and a receiving portion which receives the reception signal from the signal division element, and applies the output signal from the extraction signal adjusting portion to the reception signal.

Abstract: An apparatus and method for removing a transmission leakage signal are provided. The apparatus includes: a directional coupler connecting an antenna to a transmission path and a reception path; and a reflection coefficient adjustment unit outputting a reflection signal to the reception path, the reflection signal having the same amplitude as and opposite phase to a first transmission leakage signal generated from the transmission path and input to the reception path and a second transmission leakage signal reflected by the antenna and input to the reception path.

Abstract: Disclosed herein is a method for manufacturing a high-crush-strength iridium catalyst for hydrazine decomposition for spacecraft and satellite propulsion using bauxite, the method including: an acid treatment step of bringing bauxite into contact with a 0.1-10 M acid solution for 10-14 hr; a filtration step of filtering the acid-treated bauxite as a solid to remove the remaining acid and impurities; a thermal treatment step of bringing the filtered bauxite into contact with hot air at a temperature of 500-700° C. for 2-6 hr; a catalyst loading step of loading an iridium catalyst onto the thermally treated bauxite; and a reduction step of reducing the catalyst of the catalyst-loaded bauxite.

Abstract: Disclosed herein is a method for manufacturing a high-crush-strength iridium catalyst for hydrazine decomposition for spacecraft and satellite propulsion using bauxite, the method including: an acid treatment step of bringing bauxite into contact with a 0.1-10 M acid solution for 10-14 hr; a filtration step of filtering the acid-treated bauxite as a solid to remove the remaining acid and impurities; a thermal treatment step of bringing the filtered bauxite into contact with hot air at a temperature of 500-700° C. for 2-6 hr; a catalyst loading step of loading an iridium catalyst onto the thermally treated bauxite; and a reduction step of reducing the catalyst of the catalyst-loaded bauxite.