In this article, we will carry out the calculation for the power budget for a connection between ... more In this article, we will carry out the calculation for the power budget for a connection between a station of reception and a geostationary satellite, while stressing a phenomenon which influences the power budget which is the "phenomenon of antenna depointing" and that for both segments: ground and space. The application enables us to consider the losses caused by this phenomenon on the power budget and its impact on our connection while passing by the two cases: depointing of the antenna on the ground, and the depointing of the antenna on board. Finally, we will try to draw up a comparative study to see which of the two antennas can be most affected.
This paper will be devoted to a study which consists in the design of a multibeam offset paraboli... more This paper will be devoted to a study which consists in the design of a multibeam offset parabolic antenna embedded in the payload of a geostationary satellite in Ka-band; this antenna is responsible to ensure the communication between the satellite and multitude of receptor which are everywhere in a large area on earth and this for the broadcast of a multimedia service. First, we will start with a brief study of multibeam coverage and its characteristics, after we will study the parabolic antenna because it's this type of antenna which interests us in our application and also in order to choose the most appropriate model. In our case of study the parabolic antenna mounted in offset is the most appropriate. Finally, we will use specific software to simulate the antenna in order to arrive to determinate the different parameters of the antenna which can give us the best performances for ensure a coverage with high gain of all the area and ensure the reception of the service by all users.
In this paper, the main purpose is to design an Sband patch antenna which is basically directiona... more In this paper, the main purpose is to design an Sband patch antenna which is basically directional and circularly polarized for S-band small satellites applications. This antenna has a square shape ground and on the upper portion there is a patch which is also square but with a single truncated corner in order to get circular polarization, the connection between the patch and the ground has been established using a coaxial probe. The designed antenna can be easily integrated with a small satellite body due to the simplicity of the design. Commercially available finite element method solver based High Frequency Structural Simulator (HFSS) have been used in this analysis. The proposed antenna achieved desirable results with an axial ration of 0.17dB at center frequency of 2.2 GHz and less than 3dB for a frequency band of 31 MHz and beam width of more than 110°. The gain achieved by this antenna is around 7dBi at center frequency. The directional radiation pattern, circular polarizatio...
In this article, we will carry out the calculation for the power budget for a connection between ... more In this article, we will carry out the calculation for the power budget for a connection between a station of reception and a geostationary satellite, while stressing a phenomenon which influences the power budget which is the "phenomenon of antenna depointing" and that for both segments: ground and space. The application enables us to consider the losses caused by this phenomenon on the power budget and its impact on our connection while passing by the two cases: depointing of the antenna on the ground, and the depointing of the antenna on board. Finally, we will try to draw up a comparative study to see which of the two antennas can be most affected.
In this article, we will carry out the calculation for the power budget for a connection between ... more In this article, we will carry out the calculation for the power budget for a connection between a station of reception and a geostationary satellite, while stressing a phenomenon which influences the power budget which is the "phenomenon of antenna depointing" and that for both segments: ground and space. The application enables us to consider the losses caused by this phenomenon on the power budget and its impact on our connection while passing by the two cases: depointing of the antenna on the ground, and the depointing of the antenna on board. Finally, we will try to draw up a comparative study to see which of the two antennas can be most affected.
This paper will be devoted to a study which consists in the design of a multibeam offset paraboli... more This paper will be devoted to a study which consists in the design of a multibeam offset parabolic antenna embedded in the payload of a geostationary satellite in Ka-band; this antenna is responsible to ensure the communication between the satellite and multitude of receptor which are everywhere in a large area on earth and this for the broadcast of a multimedia service. First, we will start with a brief study of multibeam coverage and its characteristics, after we will study the parabolic antenna because it's this type of antenna which interests us in our application and also in order to choose the most appropriate model. In our case of study the parabolic antenna mounted in offset is the most appropriate. Finally, we will use specific software to simulate the antenna in order to arrive to determinate the different parameters of the antenna which can give us the best performances for ensure a coverage with high gain of all the area and ensure the reception of the service by all users.
In this paper, the main purpose is to design an Sband patch antenna which is basically directiona... more In this paper, the main purpose is to design an Sband patch antenna which is basically directional and circularly polarized for S-band small satellites applications. This antenna has a square shape ground and on the upper portion there is a patch which is also square but with a single truncated corner in order to get circular polarization, the connection between the patch and the ground has been established using a coaxial probe. The designed antenna can be easily integrated with a small satellite body due to the simplicity of the design. Commercially available finite element method solver based High Frequency Structural Simulator (HFSS) have been used in this analysis. The proposed antenna achieved desirable results with an axial ration of 0.17dB at center frequency of 2.2 GHz and less than 3dB for a frequency band of 31 MHz and beam width of more than 110°. The gain achieved by this antenna is around 7dBi at center frequency. The directional radiation pattern, circular polarizatio...
In this article, we will carry out the calculation for the power budget for a connection between ... more In this article, we will carry out the calculation for the power budget for a connection between a station of reception and a geostationary satellite, while stressing a phenomenon which influences the power budget which is the "phenomenon of antenna depointing" and that for both segments: ground and space. The application enables us to consider the losses caused by this phenomenon on the power budget and its impact on our connection while passing by the two cases: depointing of the antenna on the ground, and the depointing of the antenna on board. Finally, we will try to draw up a comparative study to see which of the two antennas can be most affected.
Uploads
Papers by Ali MEBREK