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In this paper, we extend our earlier proposal of corona product of signedgraphs into generalized corona product of signed graphs inspired by thegeneralized corona product of unsigned graphs. Then we study structural balanceand spectral properties of these graphs. Utilizing the notion of coronal of agraph, we determine computable formulae of characteristic, Laplacian, andsignless Laplacian polynomials of generalized corona product of signed graphs.Finally, we provide sufficient conditions for the generalized corona product ofsome distinct collections of signed graphs to be co-spectral.

Structural balance and spectral properties of generalized corona product of signed graphs