Disclosed is an antenna for railway vehicles including: a plurality of photonic band gaps PGB cells, placed adjacent each other and made of a layer of low dielectric properties material placed on a metal ground plane, wherein each photonic band gap cell form a reflector of the antenna; a plurality of first metallic bars, placed on top of the PBG cells; and a plurality of second metallic bars, each embedded, at least partially, in the thickness of the low dielectric properties material. The second metallic bars are each roughly perpendicular to the respective reflector.

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.

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.

A vehicle alignment system is adapted to align a vehicle with a wireless power induction coil for wireless charging through use of magnetic resonant induction. The system includes a transmission line disposed in the parking slot so as to guide the vehicle to the wireless power induction coil for charging. The transmission line leaks a signal having an operating frequency that is detected to align the vehicle left-right in the parking slot when the vehicle is aligned for charging by the wireless power induction coil. At least two vehicle mounted antennas mounted on opposite sides of transmission line when the vehicle is aligned in the parking slot detect the operating frequency from the transmission line, and signal processing circuitry detects a relative signal phase between signals detected by the antennas that is representative of alignment of the vehicle with respect to the wireless power induction coil and the parking slot.

An antenna for a communication device is disclosed. The antenna has a structure including a ground plane and a lid component. The lid component is conductive, substantially planar and has a planform shape which is lesser in a first lid component dimension (L.sub.1) than it is in a second lid component dimension (L.sub.2) perpendicular to the first lid component dimension (L.sub.1). The ground plane is conductive and substantially planar, and the size of the ground plane is greater than the size of the lid component. The lid component is conductively connected to the ground plane but also spaced apart from the ground plane, such that there is a space between the lid component and the ground plane, and the antenna is center fed.

An antenna for a vehicle. The antenna has an omni-directional radiation pattern and is configured for V2X communication. An x-y plane is defined as the horizontal plane in relation to the vehicle, an x-z plane is defined as a plane that is parallel to a side of the vehicle to which the antenna is positioned, and a y-z plane is defined as an elevation plane in relation to the vehicle. The antenna includes a first patch antenna and a second patch antenna and a reflector, and a feed network and power divider. The first patch antenna is aimed in a first direction along the x-axis. The second patch antenna is aimed in a second and opposite direction along the x-axis, and the reflector is positioned in a plane that is parallel to the x-z plane.

A communication system and method for vehicles, particularly trains, are described with the vehicle having antenna sets. Each antenna set includes a plurality of antennas mounted onto a convex-shaped vehicle roof in which an axis of one antenna set is approximately perpendicular to an axis of another antenna set and in which the antenna sets are mounted below roof level of the convex-shaped vehicle roof. A switching device is operable to switch between a first antenna configuration and a second antenna configuration based on a difference in measured signal power received at the antenna sets. The first antenna configuration is associated with a first stationary communication system of the plurality of stationary communication systems and a second antenna configuration is associated with a second stationary communication system of the plurality of stationary communication systems.

A high frequency antenna carrier in vehicle roof cross member is provided. The antenna carrier is configured to extend width-wise across a vehicle roof to provide structural support for the vehicle roof. The antenna carrier has a lower surface, and a plurality of sidewalls that meet at a common upper flange that mates in a face-to-face relationship with the vehicle roof. The sidewalls may be provided with apertures to facilitate a strong signal passage to and from the high frequency antenna through the carrier. The lower surface of the antenna carrier may be provided with apertures that are aligned with the antennas to improve signal strength.

A communications system for a vehicle includes an antenna mounted on a vehicle and configured to communicate with a plurality of remote units. A diagnostic controller is configured to detect obstacles or damage to the antenna. The diagnostic controller is configured to receive remote messages, measure a receive signal strength of the remote messages, and determine a ratio of low receive signal strength sample messages to total sample messages. The diagnostics controller is further configured to trigger a diagnostic output to the vehicle when the ratio is greater than a predetermined threshold.

A vehicle has a detection device for detecting a route-side transmitter device. The detection device has at least two receiving antennas which are suitable for receiving a magnetic field component, oriented in a longitudinal direction of the vehicle, of electromagnetic radiation which is emitted by the route-side transmitter device. The at least two receiving antennas are arranged with an offset in the longitudinal direction of the vehicle.