With the increasing water demand around the world, researchers are looking for new innovative techniques to meet this demand. Since available water resources are limited and only a few technologies like desalination are available which can be used to increase the water supply above the hydrological cycle to meet the rapidly increasing water demand. One such new emerging technology to increase the water supply is Atmospheric Water Harvesting (AWH), where the water vapors which are found everywhere in the air are condensed to obtain fresh water. The AWH system can run on low-grade energy like waste heat or solar energy, which is abundantly available in arid regions having water scarcity and can help in the decentralization of water resources by eliminating the need for power grids. In this paper, we have analyzed and compared some new innovative technologies of AWH systems after defining them mathematically and modeling them. The technologies will be compared based on various parameters such as the amount of water produced per day, the Gained Output Ratio (GOR) of the cycle under varying ambient conditions, such as dry bulb temperature (DBT), relative humidity (RH) and mass flow ratio (MFR). The results show that about 15kgh^-1 of water may be harvested with a GOR of about 0.28 for 30°C DBT, 60%RH and 80°C desiccant inlet temperature.