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We deal with the non-autonomous parameter-dependent second-order differentialequation \begin{equation*} \delta \left( \dfrac{v'}{\sqrt{1-(v')^{2}}} \right)'+ q(t) f(v)= 0, \quad t\in\mathbb{R}, \end{equation*} driven by aMinkowski-curvature operator. Here, $\delta>0$, $q\in L^{\infty}(\mathbb{R})$,$f\colon\mathopen{[}0,1\mathclose{]}\to\mathbb{R}$ is a continuous functionwith $f(0)=f(1)=0=f(\alpha)$ for some $\alpha \in\mathopen{]}0,1\mathclose{[}$, $f(s)<0$ for all$s\in\mathopen{]}0,\alpha\mathclose{[}$ and $f(s)>0$ for all$s\in\mathopen{]}\alpha,1\mathclose{[}$. Based on a careful phase-planeanalysis, under suitable assumptions on $q$ we prove the existence of strictlyincreasing heteroclinic solutions and of homoclinic solutions with a uniquechange of monotonicity. Then, we analyze the asymptotic behaviour of suchsolutions both for $\delta \to 0^{+}$ and for $\delta\to+\infty$. Somenumerical examples illustrate the stated results.

Homoclinic and heteroclinic solutions for non-autonomous Minkowski-curvature equations