Validation of Planar Array of discrete beams used in Mobile Terminal for Satellite Communication (original) (raw)
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Transport and Telecommunication Journal
The work deals with the design, modelling and research of an antenna system for transmitting and receiving information in satellite systems. It was revealed that this antenna array with a transmitter of 85 dBWt is guaranteed to solve the target problem of providing mobile satellite communications with both one global beam and a plurality of beams with a width of 0,7 × 0,7°. It should be added that the advantage of forming multiple beams compared to a global beam with a single phased antenna array is: higher data rate, relatively low requirements for antenna systems of ground stations, greater noise immunity of the radio link, the ability to dynamically control the signal power in each beam.
Phased arrays for satellite communications: a system engineering approach
ABSTRACT A synthetic overview of the fascinating topic of phased array antennas for satellite communications is presented. A system engineering approach to the design and development of phased arrays is shown to be essential in order to achieve an effective and synergic design and to implement large-scale production techniques. It is the author's firm opinion that a broadband technical background and an open, “lateral thinking” mentality are key factors for the successful design, development and production of active phased arrays
High-Gain Planar Antenna Arrays for Mobile Satellite Communications [Antenna Applications Corner]
IEEE Antennas and Propagation Magazine, 2000
Two large and low profile panel antenna arrays used as receiving and transmitting antennas for mobile satellite communications are described. The receiving and transmitting arrays have overall dimensions of 120×20.7×1.3cm 3 and 107.5×20.4×1.7cm 3 , respectively, and exhibit high gains and adequate efficiencies due to integrated array designs. For the receiving panel array, a method using a number of high efficiency sub-arrays combined with a novel active integrated global feed network is proposed. For the transmitting panel array, a number of high efficiency sub-arrays together with a novel compact waveguide feed network is employed. Based on the above techniques, two large panel antenna arrays were successfully developed. We present detailed designs of the sub-arrays, the passive and active feed networks, and the vertical transitions. Simulated and experimental results show that the designed receiving and transmitting panel arrays achieve measured gains and efficiencies of 34.1dBi, 48.2% and 33.5dBi, 36.3%, respectively, in each band, which indicates that the proposed antenna panels are good candidates for future satellite communications applications.
Design of cost-optimised active receive array antenna for mobile satellite terminals
2007
A low profile scanning antenna for reception of S-DMB has been developed in the frame of the ESA funded project "Cost-Optimised High Performance Active Receive Phase Array Antenna for Mobile Terminals (CORPA)". The aforementioned project objectives are the design, prototyping and testing of a complete antenna based on digital beam forming (DBF) providing multimedia reception within the S-DMB system. The antenna is able to scan a circularly polarised beam in the range 8 to 72 degrees, covering DMB satellites and including some margin for vehicle tilt. A conformal, phased array antenna based on DBF has been selected providing an attractive solution for such medium gain antenna. Moreover, DBF allows avoiding a complex phase calibration and provides a good auto-tracking performance in a harsh environment in terms of multipath and interference.
Multi-shaped beams antennas design and technology for future communication satellites
Annales Des Télécommunications, 1989
An overview of multi-shaped beams antennas for communication satellites is presented. Microwave technologies and relevant techniques to perform beam reconfigurability are discussed by making reference to commercial satellites developed in the USA and to recent studies which Selenia Spazio completed for ESA and Intelsat. Emphasis is given to the design of advanced antenna configurations for the next generation of communication satellites with different beam and capacity reconfigurability levels. Les auteurs présentent une vue d’ensemble sur les antennes à faisceaux multiples modelés. La technologie hyperfréquence et les techniques associées sont examinées en se référant aux satellites commerciaux développés aux Etats-Unis ou aux récentes études realisées par Selenia Spazio pour I’Agence spatiale européenne et Intelsat. L’accent est mis sur les configurations d’antenne avancées destinées à la prochaine génération de satellites qui présenteront les différents niveaux de reconfigurabilité en faisceaux et en capacité.
Satellite ground stations with electronic beam steering
2012 IEEE First AESS European Conference on Satellite Telecommunications (ESTEL), 2012
In this work, we propose electronic beam steering via antenna arrays as a substitute for large parabolic antennas at satellite ground stations. We concentrate on two array geometries, faceted arrays and hemispherical arrays. A thorough analysis is carried out of the radiation characteristics, the array size, as well as the antenna element distribution and spacing. Moreover, in order to fulfill the requirement of the array design, that is, to achieve a higher gain at low elevation angles where the longer spacecraft to ground station distance leads to a larger range loss, we propose to adjust the number of active antenna elements, i.e., some antenna elements are turned on while others are turned off according to the required level of antenna gain. This also contributes to a concept of an optimized array design for this specific application. In the simulations, the array optimization for both array geometries is further investigated and realized with a realistic ephemeris incorporated. The numerical results support the proposal of replacing large reflector antennas by electronic beam steering via antenna arrays at satellite ground stations.
Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2009
Our activity has to do with the design of Direct Radiating Arrays (DRA) for satellite communications. The objective is to have a reduced number of controls in order to minimize the manufacturing and operating complexity. The DRAs will create a set of simultaneously overlapped multi-beams in the frequency range of 20 GHz and will satisfy certain specifications (End of Coverage (EOC) gain, grating and side lobe levels). RadioCommunications Laboratory (RCL) shall consider the DRA design and shall mainly optimize the geometry of the array and develop the appropriate software tool. The design methods which are going to be used are the Fractal Technique and the Orthogonal Method(OM) in conjunction with the Orthogonal Perturbation Method (OPM). Some preliminary examples are presented and show the effectiveness of the design methods.
Modelling and Simulation of Phased Array Antenna for LEO Satellite Tracking
2002
Nowadays achievements on mobile satellite systems (MSS) communication give a great concern for research in global wireless communication fields. The developments of several Low Earth Orbit (LEO) satellite systems have promised worldwide connectivity with low delay real-time voice communications. Since the LEO satellite systems revolving around the Earth overlay mobile terminals (MT) or Earth stations over several minutes only, a sophisticated LEO satellite tracking must be introduced. Phased array antenna is seen to be the most promising solution. Although phased array antenna has been widely use for mobile cellular communication systems with advantages of its electronically beam steering, it is still not truly used in integrate with LEO MSS. In this paper, the mathematical model of phased array antenna is introduced for LEO satellite tracking purpose. Furthermore, the simulation of beam forming using phased array antenna is explored to obtain multiple and also steerable beams for tracking the satellite smoothly. Finally, a integration of phased array antenna in MT is proposed for future global wireless communication systems.