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This paper deals with the design, simulation, and practical modeling of metamaterial-based multiband conformal bandpass filter (BPF) for various wireless communication applications with improved quality factors. The novel metamaterial in the form of a split ring resonator is loaded on the ground plane face of the proposed BPF. The overall dimension of the designed BPF is only $28\times 28{\mathrm{\text{mm}}}^2$. The proposed BPF is tuned initially for quality factor enhancement based on the thickness of the substrate, physical parameters of the f transmission line, ground plane, externally loaded elements, and the gap in the metamaterial loading. The suggested filter operates at triple band covering the frequency bands from 1.4 to 2.2, 3.6 to 3.9, and 4.8 to 5.9GHz, which are suitable for sub-6GHz 5G and other wireless applications. The insertion loss is observed as 1dB, which is suitable for the proposed BPF. The conformal behavior of the filter is judged through bending deformation analysis at various bending positions like (15${}^{\circ }$, 30${}^{\circ }$, 45${}^{\circ }$, 60${}^{\circ }$, and 90${}^{\circ }$). The proposed BPF retains triple pass band characteristics at various bending deformations, which makes it suitable to be used in curved structures or flexible circuitry. The theory of equivalent circuits and quality factor $(Q)$ of the designed BPF is discussed in this paper. The results are analyzed experimentally through ANRITSU-MS2037C combinational analyzer. The proposed BPF is suitable for sub-6 GHz 5G, WLAN, and Wi-Max applications.

To integrate conformal antenna system on surface vessel, we must deal with some key problem, first is the solution, second the development platform, and third the approaches based on the solution and platform, for the design of antenna, and solve issues of details, such as reduce the kind and number of antenna, furthermore, the bulk of the antenna on a ship, to realize the electromagnetic stealth meeting the requirements of warship. Methods: the development framework had been built, including model of antenna, software radio and cognitive radio framework, as well as development platform which is an adaptive simulating and design platform based on distribution and parallel system, to realize the phased array, optimize the placement of array elements and whole structure of the planar, calculate the feature of material in needs which call different EM software in the proper time automatically. Furthermore, the series methods to solve the key technology such as signal processing algorithm and spectrum management had been proposed, including thinking of the top-level design, and modularity of approaches, as well as the technique of semi-physical simulation. Results: The framework and methods meet the requirement for seamless RF integration of the conformal antenna system, in which all the output are met the demand of design. For example, in 3.8-4.0GHz frequency band, the antenna parameters is as follows: horizontal omnidirectional gain 6dBi, directional beam gain 22dBi, VSWR 2, sidelobe level of horizontal plane −22dB, impeadance=50, number of planar=6, elements in each planar=128. Conclusion: The framework and methods brings many innovations, including not only design concept and design methods, but also design platform and design results which have many advantages such as high reliability and intelligence, strong stability and extendibility, as well as self-adapting.