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This paper describes a new modular concept for antennas for mobile satellite communications in Ka band. The antenna concept is based on an active planar array, which is subdivided into small subarrays. The antenna main beam can be steered by using a combined mechanical and electronical steering approach. The modular concept of both the aperture design as well as the beam steering allows easy tailoring...
A planar Ka-Band antenna demonstrator for nomadic satellite communication (satcom) is presented. A hybrid beam steering concept (mechanical/electrical) is proposed and implemented. Here, the electrical beam steering (phased array) with its fast response time can compensate for mechanical pointing errors and hence, reduce the accuracy requirements of the mechanical positioning unit. The aperture of...
A planar Ka-Band antenna demonstrator for nomadic satellite communication (satcom) is presented. A hybrid beam steering concept (mechanical/electrical) is proposed and implemented. Here, the electrical beam steering (phased array) with its fast response time can compensate for mechanical pointing errors and hence, reduce the accuracy requirements of the mechanical positioning unit. The aperture of...
This article presents an overview of developments performed by IMST in the area of phased array technology. Such technology has become a key area of interest for applications such as mobile satellite communication terminals, pushed by the ever growing multimedia services provided over wireless links and satellites, and radar frontends, motivated by automotive applications and sensory, for example...
This paper gives an overview on different research activities on electronically steerable antennas at Ka-band within the framework of the SANTANA project. In addition, it gives an outlook on future objectives, namely the perspective of testing SANTANA technologies with the projected German research satellite “Heinrich Hertz”.
This paper presents the background, the vision, and the motivation of the SANTANA project (Smart Antenna Terminal). Recent realizations of electronically steerable receive (Rx) and transmit (Tx) antennas for satellite communications at Ka-Band are shown. In detail, the integration and packaging techniques of frontend modules, which combine the antenna, the RF circuitry, and the cooling system within...
This paper describes an innovative phased array antenna for maritime satellite communications. The antenna consists of a near spherical aperture with 26 radiating elements that allow very good hemispherical coverage and a nearly constant gain down to very low elevation angles. The antenna is suitable for L-band satellite systems like Inmarsat or Thuraya.
This paper deals with a modular Rx- and Tx- antenna terminal featuring digital beamforming (DBF) at Ka-band frequencies. Background and vision of the project SANTANA II and recent realizations are described. Different system components are outlined covering digital baseband, RF- and IF- level as well as software aspects. An outlook on mobile field tests, which will be reported at the conference, concludes...
This paper describes an advanced concept for an electronically steerable antenna for mobile satellite communications. The antenna consists of eight stacked patches, mounted on a heptagonal surface. By switching between either single elements or combinations of two active elements hemispherical coverage can be reached. The realization of an inertial sensor system and an active power control makes the...
Mobile satellite terminals especially with high-gain antenna require fast and accurate beam tracking algorithms for communication. The main topic of this paper is the extension of a tracking algorithm to mobile satellite communications, its implementation and performance. The presented considerations and simulation results concern low SNR condition and narrow antenna beam configuration as existing...
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