An antenna arrangement for generating an electric field inside a process chamber through a window. Generally, the antenna arrangement comprises an outer loop, comprising a first outer loop turn disposed around an antenna axis, an inner loop, comprising a first inner loop turn disposed around the antenna axis, wherein the inner loop is closer to the antenna axis than the outer loop is to the antenna axis in each azimuthal direction, and a radial connector radially electrically connecting the outer loop to the inner loop, wherein the radial connector is placed a large distance from the window.