Interference and compatibility issues between the mobile satellite service and the fixed service in the Ku band
This paper examines the potential interference between the mobile satellite service and the fixed service in the Ku band. At first, the aggregate and the single-entry interference criteria for the terrestrial fixed service stations are calculated. Then, all the parameters that influence the interference magnitude are presented and extensively analyzed. In order to evaluate the impact of each one of them in the interference calculations, different scenarios are taken into consideration and simulations are conducted. The results are thoroughly presented and analyzed.
Application of a new methodology for the coordination of the fixed service (FS) with mobile earth stations on board vessels in realistic interference conditions
This paper addresses an in-depth analysis of the interference produced to the fixed service (FS) by the earth stations on board vessels (ESVs) operating with geostationary satellites and proposes a new methodology for the development of coordination areas around the FS receivers, taking into account parameters such as the velocity of the ESVs and their frequency of passage from specific locations. Simulations performed in realistic interference conditions prove the validity of the new methodology, which can constitute the basis for the development of new methods for the coordination between the fixed service and the ESVs contributing, by this way, significantly to the harmonic coexistence of the two services.
The REX-ISOLDE project
The Radioactive Beam Experiment REX-ISOLDE [1–3] is a pilot experiment at ISOLDE (CERN) testing the new concept of post acceleration of radioactive ion beams by using charge breeding of the ions in a high charge state ion source and the efficient acceleration of the highly charged ions in a short LINAC using modern ion accelerator structures. In order to prepare the ions for the experiments singly charged radioactive ions from the on-line mass separator ISOLDE will be cooled and bunched in a Penning trap, charge bred in an electron beam ion source (EBIS) and finally accelerated in the LINAC. The LINAC consists of a radiofrequency quadrupole (RFQ) accelerator, which accelerates the ions up to 0.3 MeV/u, an interdigital H-type (IH) structure with a final energy between 1.1 and 1.2 MeV/u and three seven gap resonators, which allow the variation of the final energy. With an energy of the radioactive beams between 0.8 MeV/u and 2.2 MeV/u a wide range of experiments in the field of nuclear spectroscopy, astrophysics and solid state physics will be addressed by REX-ISOLDE.