The COCORAM project evolves in the context of a very strong increase of the integration density of electronic systems for communication, localization, or supervision equipments. The deployment of such systems also has to answer an increasing demand of flexibility in terms of frequency, power or coverage. The flexibility in frequency can be simultaneous with multi-band devices or selective by reconfiguration of the frequency band. The flexibility in terms of power allows minimizing the consumption of the system and the flexibility of coverage directing the beam through the target in order to optimize the link budget or on the contrary to protect itself from a noise source. The increase of both efficiency and compactness requires grouping elementary functions (antenna, filter and LNA), which allows to reduce interconnection stages and to take into account the interactions between individual elements. The first objective of this project is to develop a methodology for co-designing the antenna and the associated circuits (filters and LNA) in order to reach optimal performances (radiation, efficiency) with an integrated and compact device. The demonstration will be realized with the design of a network of 4 elements for GNSS (Global Satellite Navigation System) radio navigation systems. Several difficulties have to be raised: - The capacity to develop a generic tool for the co-design of multifunction systems, in particular the matching of a circuit on complex and frequency variable impedances at its input and output ports, - The design of a radiation element with multiband circular polarizations, large angular opening, and the minimization of couplings during the network assembly, - The design of multiband filters in a context of a mutual design (co-design) and the distribution of the filtering function within the system, between the antenna and the LNA, and after the LNA, - The design of sub-circuits in heterogeneous technologies, - The realization of a part of the filtering function with the low quality factor elements used for the LNA MMIC, - The compromise between power and noise matching during the co-design for which the impedances of reference are different from 50 ohms. This project associates two academic partners (XLIM and INRIA) and a center of technological resources (CISTEME) with complementary skills. XLIM will bring its skills in the domains of antennas, filters and low-noise amplifiers. INRIA will bring all its mathematical skills in polynomial synthesis and modeling, which are necessary for the implementation of a generic methodology of co-design. CISTEME will bring its experience in the definition of the systems specifications and its capacity to go beyond the academic concept for the realization of demonstrators. The 3 partners have a long experience of collaborative projects and work together for a long time.