  We address the photonic spin-orbit coupling known from nano-optics and
plasmonics in the microwave regime. The transverse spin $\mathbf{S}$ and
momentum $\mathbf{q}$ of microwaves emitted by an excited magnetic dot are
locked by $\mathbf{q}\cdot\mathbf{S}=0$ with a fixed chirality
$\hat{\mathbf{n}}\cdot(\hat{\bf S}\times\hat{\bf q})=1$ when evanescent along
$\hat{\mathbf{n}}\perp {\bf q}$. This field excites magnons in a nearby
magnetic film in the form of directional beams that rotate with the
magnetization direction. The exchange of these magnons through a magnetic
substrate leads to a highly tunable strong coupling and entanglement between
two distant nanomagnets.
