Abstract: A wedge shaped scimitar radio frequency (RF) antenna can include a lip, an RF signal feed connected to the lip, a base, and a back surface. The antenna can also include a convexly curved outer surface that extends from the lip to the back surface. The convexly curved outer surface can be wedge shaped from the back surface of the antenna to the lip. The antenna can also include a concavely curved outer surface that extends from the lip to the base of the antenna, and the concavely curved outer surface can be wedge shaped from the base of the antenna to the lip.

Abstract: A relatively short broad band monopole coaxial antenna is provided with a center conductor and an outer radiator. The antenna is mounted above a ground plane and comprises a bare outer radiator portion adjacent the ground plane and a portion remote from the ground plane which is covered with a variable thickness microwave absorbent material. The signal to be transmitted is applied to the base of the monopole antenna adjacent the ground plane. Non-radiated signals propagate up the antenna. The high frequency components are absorbed by the microwave absorbing material. A tip matching network and a base matching network are coupled between the outer conductor and the ground plane for attenuating and matching the low frequency components of the non-radiated signals. The resulting monopole coaxial antenna has no undesirable reflections and has the appearance of infinite effective length antenna.