[en] Among the features exhibited by the rotational spectra of doubly odd nuclei, signature inversion has attracted a lot of attention in both theory and experiments. Near the end of the last century many new experimental results were added in doubly odd nuclei of A=80 region, e.g. ^76-82₃₇Rb, ⁷⁸Br, ⁸²Y. Although these studies have shown that the low-spin structure of these nuclei could be complex, very interesting systematic behaviors have been identified. One of the most striking features occurs in the behavior of the differences in energy between the odd and even spin states (signature splitting). In last few years, it has been observed that in different mass regions at A = 160, 130 and 80 for doubly odd nuclei, signature inversion is a common phenomenon. Over the years, sufficient data have been accumulated by researchers to enable a meaningful study of the systematic of the signature inversion phenomenon to be undertaken. In the present paper the experimental data for isotopic chain of Rubidium (Rb) has been examined and analysis of the staggering pattern is presented