Antenna system including a circularly polarized antenna

摘要

An antenna system includes a circularly polarized (CP) antenna for receiving and/or transmitting a circularly polarized RF signal. The CP antenna includes a pair of radiating patches each having an elongated shape. An elongated axis is defined along a longest length of each of the radiating patches. The elongated axes are disposed generally perpendicular to one another to generate the circular polarization. A coplanar waveguide feeding element is disposed between the radiating patches for feeding RF signals from and/or to the radiating patches via electromagnetic coupling. A width of the slot of the coplanar waveguide is varied to provide impedance matching of the CP antenna with a transmission line.

主权项

1. A window having integrated antennas for receiving and/or transmitting a RF signal, said window comprising:
a nonconductive pane; a CP antenna for receiving and/or transmitting circularly polarized RF signals, said CP antenna including
a first radiating patch disposed on said nonconductive pane,a second radiating patch disposed generally parallel to and non-planar with said first radiating patch, anda feeding element disposed between said radiating patches for feeding RF signals from and/or to said radiating patches via electromagnetic coupling,wherein an elongated axis is defined along a longest length of each of said radiating patches, andwherein said elongated axis of said first radiating patch is disposed at about a 90 degree angle with respect to said elongated axis of said second radiating patch; an LP antenna for receiving and/or transmitting linearly polarized RF signals, said LP antenna including
a first radiating patch disposed on said nonconductive pane, anda second radiating patch disposed generally parallel to and non-planar with said first radiating patch; a common ground plane disposed between said first and second radiating patches of both said CP and LP antennas; and a common reflector disposed generally parallel to and non-planar with said common ground plane and said radiating patches of both said CP and LP antennas such that one of said radiating patches of each of said CP and LP antennas is sandwiched between said common reflector and said common ground plane.