In this paper, we proposed a hybrid or compound reconfigurable antenna using three PIN diode switching to achieve the different types of reconfiguration: frequency and radiation pattern. Based on an open ring structure with the varied active PIN diodes, the proposed antenna radiation pattern can scan a beam along with one of five directions with the same operating frequency. Depended on the number of active PIN diodes, the antenna operating frequency also can switch to two of six bands which are 1.9 GHz, 2.4/2.6 GHz, 3.5 GHz, 5 GHz, and 5.6 GHz. All frequency bands are popular ones of wireless communication as well as 5G/IoT applications. In addition, the antenna gets a compact size of 30mm *30 mm*1.6 mm and wide bandwidth due to using the radiating shape of a double ring. All details of antenna design are optimized by CST software, and the simulation results agree well with the measurement results.
To support the future envisaged services that require a dynamic provision of wavelength paths, we have developed a dynamic optical path network utilizing the multi-stage routing capable selective switch-based optical cross-connect architecture. We evaluated and compared the performance of the developed network to that of conventional optical WDM networks. We also estimated the impact of intra-node parameters, i.e. the number of wavelength groups per fiber and the number of substituted 1xn switching devices applied for each outgoing link, on the network performance. Simulation results demonstrate that our proposed network offers almost the same performance as the conventional network while enabling a significant hardware scale reduction. A trade-off between the hardware scale reduction and the performance offset from the conventional network was also clarified.
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