Parallel acquisition scheme for direct-sequence spread-spectrum multiple-access packet radio communi - Electronics Letters

A second example is representative of a complex antenna structure. An RCDLA, introduced by [5] and shown in Fig. 1, is analysed close to a homogeneous lossy dielectric sphere of radius R = 0.10m with relative permittivity E, = 50 and specific conductivity o = 1.3Sirn at f = 925MHz. The distance between the sphere and case is 0.02m, and the cover plate of the case is 0.04111 above the plane 8 = 90”. Fig. 3 compares the far-field radiation pattern in the horizontal plane (0 = 90’) for free-space to the case in which the head is present.