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Wideband digital array radar (WDAR) has the potential of achieving high resolution and providing multi-function simultaneously, but it is limited in practical use due to the effects of frequency-dependent array model errors. A method to jointly calibrate gain-phase perturbations and mutual coupling effects in WDRA is presented. First, a sparse-based method is deployed to calculate the narrowband calibration...
An efficient reduced model of the method of moments based on the second-order Arnoldi (SOAR) algorithm is proposed for the wide-band simulations of the microstrip circuits. In order to construct the reduced model, the second-order Taylor series is employed to expand the impedance matrix, and then the impedance matrix can be linearised with respect to the frequency with transformations. Thus a (SOAR)...
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