A microfabricated ion trap with integrated microwave circuitry
  We describe the design, fabrication and testing of a surface-electrode ion trap, which incorporates microwave waveguides, resonators and coupling elements for the manipulation of trapped ion qubits using near-field microwaves. The trap is optimised to give a large microwave field gradient to allow state-dependent manipulation of the ions' motional degrees of freedom, the key to multiqubit entanglement. The microwave field near the centre of the trap is characterised by driving hyperfine transitions in a single laser-cooled 43Ca+ ion. 
D. T. C. Allcock, T. P. Harty, C. J. Ballance, B. C. Keitch, N. M.   Linke, D. N. Stacey, and D. M. Lucas
physics.atom-ph physics.ins-det quant-ph