By using invert microstrip, a new on wafer multiline TRL calibration kits for THz measurement are designed in this paper. Our approach is based on the multi-frequency formulation of the vector network analyzer calibration problem. The calibration kits are designed covers a range of frequencies from 70 to 220 GHz. The simulator results are given in this paper.

This paper presents the development of 110GHz monolithic low-noise amplifier (LNA) using 100 nm In0.52Al0.48As/In0.53Ga0.47As GaAs metamorphic high electron mobility transistors (MHEMTs) technology. The MHEMT technology features an extrinsic fT of 220GHz and an extrinsic transconduction gm,max of 940mS/mm. The LNA is consisted by 4 stages 2×20um gate width transistors. The amplifier demonstrates a gain of 17.7dB at 110GHz with a noise figure of 4.3dB when biased for high gain, and a noise figure of 3.6dB is achieved with an associated gain of 16.6dB at 110GHz when biased for low-noise figure. The chip area is 2.7mm×1.4mm.

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Carbon dioxide displacement and storage is the most feasible technology to realize carbon neutralization, and also the key technology to improve the recovery of tight reservoirs. CO 2 capture and carbonization can be achieved by precipitation of potassium carbonate by using the "Ethanol + KOH" solution system. The reaction process in the solution system is affected by the ethanol concentration, resulting in different CO 2 carbonization amounts with the change of ethanol concentration. At the same time, the potassium-based acid salt generated by precipitation can react with water to complete the regeneration of ethanol. In this paper, experimental means are used to study the CO2 capture efficiency of the "Ethanol + KOH" system, monitor the ethanol content in the solution in real time, and screen out the best ethanol concentration suitable for the formation temperature. Add KOH to the solution, use the ethanol regenerated in the solution after carbonization reaction to carbonize again, and determine the maximum CO 2 capture of "ethanol + KOH". Based on the high temperature and high pressure core displacement device, the CO2 burial experiment after the injection of "Ethanol + KOH" solution was carried out to clarify the change rule of CO2 burial under the action of "Ethanol + KOH" system in low permeability cores. The research results show that "96% ethanol+3g KOH" can effectively capture CO 2 , and each capture will produce 4.56g precipitation on average. At the same time, after the core is saturated with "96% ethanol+3gKOH" solution, CO 2 is injected to generate sediment, and the core permeability decreases by about 15%. The research results of this paper prove that, compared with direct injection of CO 2 into the formation, injection of this system into the formation in advance can accelerate the CO 2 carbonization process, thus effectively improving the CO 2 burial efficiency.