A dipole antenna is disclosed, which is formed on an electrical circuit substrate having a ground plane and comprises a first antenna group, a second antenna group and a feeding microstrip line, wherein the first antenna group and the second antenna group have the length of a quarter wavelength on the substrate, two feeding points are formed by the intersections of the individual vertical radiating metallic line and the radiating metallic line on two sides, and the feeding microstrip line is connected between the two vertical radiating metallic lines thereby enhancing the radiation signals.

A dipole antenna is disclosed, which is formed on an electrical circuit substrate having a ground plane and comprises a first antenna group, a second antenna group and a feeding microstrip line, wherein the first antenna group and the second antenna group have the length of a quarter wavelength on the substrate, two feeding points are formed by the intersections of the individual vertical radiating metallic line and the radiating metallic line on two sides, and the feeding microstrip line is connected between the two vertical radiating metallic lines thereby enhancing the radiation signals.

Disclosed is a system, method, mobile communication device and one or more computer programs for a monitoring system. In one aspect, the system includes a plurality of transmitters, each transmitter having associated therewith a reflector antenna configured to substantially reflect signal transmission toward a detection area; and a mobile device configured to: receive transmitter signals from at least two transmitters from the plurality of transmitters; and determine that the mobile device is located within the detection area based on received signal strengths of the at least some of the transmitter signals.

An antenna device installed in a vehicle includes a stacked dipole antenna unit. The stacked dipole antenna unit has a plurality of dipole antennas that are arranged parallel to a plane perpendicular to a front-back direction of the vehicle.

An antenna device installed in a vehicle includes a stacked dipole antenna unit. The stacked dipole antenna unit has a plurality of dipole antennas that are arranged parallel to a plane perpendicular to a front-back direction of the vehicle.

An array antenna is provided with: a first conductive member including a planar part; plural antennas arranged at a predetermined first interval to the planar part of the first conductive member, each of the plural antennas transmitting and receiving radio frequencies of a first polarization and radio frequencies of a second polarization that is different from the first polarization; and a second conductive member provided between the antennas adjacent to each other among the plural antennas via a gap of a predetermined second interval to the planar part of the first conductive member, the second conductive member being capacitively coupled to the first conductive member.

An RF antenna assembly and system are provided that can employ cost-effective geometry and manufacturing methods to control tolerance variations, thereby precisely controlling an antenna element of the RF antenna assembly during manufacturing and operation and enabling the RF antenna system to properly operate at high frequencies, such as in a 6-67 GHz frequency range. The RF antenna assembly can include a top alignment collar, a bottom alignment collar coupled to the top alignment collar by a press fit connection, and the antenna element secured from movement in all degrees of freedom and aligned for consistent RF operation by the top alignment collar and the press fit connection.

A compact antenna device has a ground plane at floating potential and at least one dipole antenna extending through the ground plane. The at least one dipole antenna has first and second strands extending on either side of the ground plane. A control circuit is arranged on the ground plane in order to control the at least one dipole antenna.

A multiband radiating array according to the present invention includes a vertical column of lower band dipole elements and a vertical column of higher band dipole elements. The lower band dipole elements operate at a lower operational frequency band, and the lower band dipole elements have dipole arms that combine to be about one half of a wavelength of the lower operational frequency band midpoint frequency. The higher band dipole elements operate at a higher frequency band, and the higher band dipole elements have dipole arms that combine to be about three quarters of a wavelength of the higher operational frequency band midpoint frequency. The higher band radiating elements are supported above a reflector by higher band feed boards. A combination of the higher band feed boards and higher band dipole arms do not resonate in the lower operational frequency band.

A multiband radiating array according to the present invention includes a vertical column of lower band dipole elements and a vertical column of higher band dipole elements. The lower band dipole elements operate at a lower operational frequency band, and the lower band dipole elements have dipole arms that combine to be about one half of a wavelength of the lower operational frequency band midpoint frequency. The higher band dipole elements operate at a higher frequency band, and the higher band dipole elements have dipole arms that combine to be about three quarters of a wavelength of the higher operational frequency band midpoint frequency. The higher band radiating elements are supported above a reflector by higher band feed boards. A combination of the higher band feed boards and higher band dipole arms do not resonate in the lower operational frequency band.