The design of a Global Navigation Satellite System (GNSS) antenna requires consideration of a range of characteristics including, for example, the ability for tracking satellites at low elevation, phase centre variation (PCV), antenna efficiency and impedance, axial ratio and up-down ratio (UDR), antenna bandwidth, etc. whilst also providing a light weight, compact and robust form factor. For rover applications this becomes particularly important when the satellites being accessed may be at low elevations where prior art GNSS antenna exhibit poor performance. To address this a GNSS antenna is provided comprising a domed array of opposed metallized antenna elements which are indirectly coupled via a pair of dipoles to the feed network thereby avoiding the difficulties associated with direct electrical connections of feed circuits to antenna elements.

The design of a Global Navigation Satellite System (GNSS) antenna requires consideration of a range of characteristics including, for example, the ability for tracking satellites at low elevation, phase centre variation (PCV), antenna efficiency and impedance, axial ratio and up-down ratio (UDR), antenna bandwidth, etc. whilst also providing a light weight, compact and robust form factor. For rover applications this becomes particularly important when the satellites being accessed may be at low elevations where prior art GNSS antenna exhibit poor performance. To address this a GNSS antenna is provided comprising a domed array of opposed metallized antenna elements which are indirectly coupled via a pair of dipoles to the feed network thereby avoiding the difficulties associated with direct electrical connections of feed circuits to antenna elements.

The invention relates to a Global navigation satellite systems (GNSS) antenna. The invention also relates to a Global navigation satellite systems (GNSS) module comprising at least one GNSS antenna according to the invention. The invention further relates to a vehicle, such as a car, comprising at least one GNSS module to the invention.

The invention relates to a Global navigation satellite systems (GNSS) antenna. The invention also relates to a Global navigation satellite systems (GNSS) module comprising at least one GNSS antenna according to the invention. The invention further relates to a vehicle, such as a car, comprising at least one GNSS module to the invention.

A GNSS antenna and an inertial measurement unit are placed at a longitudinal center of a unit base mountable onto a work vehicle. A wireless communication unit is placed at the longitudinal one end side of the unit base. A wireless communication antenna of the wireless communication unit is placed in a front part of the unit base, which is located on the front side of a vehicle body when the unit base is mounted on the work vehicle. The GNSS antenna is provided above the inertial measurement unit.

A GNSS antenna and an inertial measurement unit are placed at a longitudinal center of a unit base mountable onto a work vehicle. A wireless communication unit is placed at the longitudinal one end side of the unit base. A wireless communication antenna of the wireless communication unit is placed in a front part of the unit base, which is located on the front side of a vehicle body when the unit base is mounted on the work vehicle. The GNSS antenna is provided above the inertial measurement unit.

The work vehicle includes a vehicle body, a cabin mounted on the vehicle body and having a roof, and a positioning device located above the cabin and configured to detect a position of the vehicle body on the basis of a signal transmitted from a positioning satellite. The roof has a roof front end located in a forefront portion in a front-rear direction; and a roof uppermost end located behind the roof front end and located higher than the roof front end. A position of the positioning device is lower than the roof uppermost end.

The work vehicle includes a vehicle body, a cabin mounted on the vehicle body and having a roof, and a positioning device located above the cabin and configured to detect a position of the vehicle body on the basis of a signal transmitted from a positioning satellite. The roof has a roof front end located in a forefront portion in a front-rear direction; and a roof uppermost end located behind the roof front end and located higher than the roof front end. A position of the positioning device is lower than the roof uppermost end.

Implementations of the present disclosure relate to positioning and synchronization of network device. A positioning and synchronization apparatus comprises an antenna. The apparatus also comprises a small form factor pluggable (SFP) connector comprising a first pin connected to a first pin of a SFP fiber port of a network device and a second pin connected to a second pin of the SFP fiber port. The apparatus also comprises a Global Navigation Satellite System (GNSS) receiver. The GNSS receiver is configured to receive signals comprising positioning-related information over the antenna and to provide a positioning signal over the first pin of the SFP connector and a pulse per second (PPS) signal over the second pin of the SFP connector.

A navigational apparatus and method for augmenting a GNSS signal to the GPS simulator with alternative position, navigation, or timing (PNT) data, wherein the GPS simulator encodes an RF-simulated GPS signal based on the alternative PNT data when the GNSS signal is not available or is denied. The alternative PNT data may be provided by one or more of an Inertial Measurement Unit, Inertial Navigation System (IMU/INS) module and oscillator coupled to the GPS simulator.