Abstract: A dual-band omnidirectional antenna is provided. The antenna comprises a vertically stacked antenna array, in the following order: a first dual-band dipole which resonates at a first frequency band and a second frequency band, a first single-band dipole which resonates only at the first frequency band, a second single-band dipole which resonates only at the first frequency band, and a second dual band dipole which resonates at the first frequency band and second frequency band. The first frequency band is of a higher frequency than the second frequency band.

Abstract: A utility meter has an internal antenna for transmitting data. The antenna is positioned between the radome of the utility meter and its front surface. The antenna comprises dipole radiator that is generally curved to the shape of the meter housing. The dipole radiator comprises a dielectric substrate carrying two asymmetric curved radiating metallic sheets, each forming a portion of the dipole, which combined extend about 135° of the circumference of the utility meter. A balun feed is connected to the metallic sheets and a transmission line is coupled to a transmitter.

Abstract: An antenna is provided which includes a primary folded dipole element and a feed for the primary folded dipole element. The primary folded dipole element is operable to resonate at a first frequency range. A parasitic dipole element is located within the primary folded dipole element and is spaced therefrom. The parasitic dipole element is operable to resonate at a frequency range that is higher than the first frequency range. Additional parasitic dipole elements may be located within the primary folded dipole element and spaced therefrom to resonate at different frequency ranges.

Abstract: A license plate frame assembly comprises a license plate frame, a seat member attached to the license plate frame, and a first antenna carried at the seat member in a position facing at an angle from the vertical. Also, multiple antennas may be carried by the license plate frame.

Abstract: An adjustable mobile antenna comprising a dielectric rod several feet in length, a loading coil comprising a conductive wire helically wound in close fashion along an upper portion of the length of the dielectric rod, a protective outer insulator jacket covering the loading coil and a major portion of the dielectric rod, and a dielectric sleeve mounted on the outside of the protective jacket and slidable thereon along the length of the loading coil to effect "dielectric loading" of the loading coil to control the frequency of the antenna.