主权项 |
1. An antenna element for transmission and/or reception of signals within a frequency band, the antenna element comprising a ground plane, a patch radiator, a connection point for connection of the antenna element to a feed network having a terminating impedance, and a probe having two ends, the probe being located between the ground plane and the patch radiator, the patch radiator being disposed in a parallel relationship with the ground plane to form a resonant cavity between the patch radiator and the ground plane,
wherein the antenna element comprises a transmission line disposed in a parallel relationship with the ground plane, wherein the transmission line is connected to an end of the probe and arranged to have a length such that an impedance at said end of the probe is transformed, and wherein the transmission line is contained within the resonant cavity between the patch radiator and the ground plane. |