The invention relates to an underwater antenna device with a nonstationary antenna, an extension mechanism and a repositioning mechanism, wherein an extending force can be applied in a direction of the extending force by the extension mechanism of the antenna and an opposing force can be applied in a direction of the opposing force, in the opposite direction to the extending force by the repositioning mechanism of the antenna, characterized in that the repositioning mechanism or a part of the repositioning mechanism is designed as selectively nonstationary, so that, by selected changes to the position, the antenna can be positioned in a retracted position, an extended position or an intermediate position.

A telescopic mast which is automatically extendable and/or retractable comprising a first tubular section and a second tubular section having a locking member mounted thereto. The first tubular section is slideably disposed within the second tubular section, and the locking member is movable in a radial direction relative to the second tubular section to bear against the first tubular section, so that the first and second tubular sections are held together. A third tubular section has a disengaging block mounted thereto. The second tubular section is slideably disposed within the third tubular section, and the disengaging block is shaped to guide the locking member radially outwards and disengage the locking member from the first tubular section when the mast is collapsed. When the mast is retracted or collapsed the second tubular section slides with respect to the third tubular section so the disengaging block guides the locking member radially outwards.

Disclosed is a retractable antenna system designed for enhancing communication capabilities in sea environments for unmanned undersea vehicles (UUVs). The system includes a housing, a retractable antenna system with a central mast ending in a yoke, and an actuator attached to the housing to enable the rotation of the central mast in and out of the housing. Additionally, attachment means are provided for external fixation of the system to the UUV. This innovative design allows for the selective deployment and retraction of the antenna system, providing improved communication functionality for UUVs operating in challenging underwater conditions.

An AMC antenna apparatus includes a ground plane and a flexible antenna element layer above the ground plane. The ground plane includes a conductive base surface, a plurality of flexible conductors, and a frequency selective surface (FSS) layer above the base surface, where the FSS layer includes a plurality of conductive patches separated from one another. Each of the flexible conductors electrically connects one of the conductive patches to the base surface. A latch mechanism is arranged between the base layer and the FSS layer. An inflatable bladder system between the base layer and the FSS layer is configured to receive a gas input during deployment of the antenna apparatus and inflate to produce force sufficient to cause the latch mechanism to transition from an unlatched state to a latched state in which the conductive base surface is fixedly separated from the FSS layer at a predetermined distance.

A telescoping mast having a latch assembly includes a latch body mountable to a first tube section, a latch mechanism supported by the latch body, a toggle mechanism operatively connected to the latch mechanism, and a latch plate mountable to a second tube section. The latch mechanism includes a pawl member pivotably between an engaged position for interlocking with a corresponding recess in the latch plate to thereby restrict axial movement between the first and second tube sections, and a disengaged position allowing relative axial movement between the first and second tube sections. The toggle mechanism is movable between an over-center locked configuration corresponding to the engaged position of the latch mechanism and an unlocked configuration corresponding to the disengaged position of the latch member.

An AMC antenna apparatus includes a ground plane and a flexible antenna element layer above the ground plane. The ground plane includes a conductive base surface, a plurality of flexible conductors, and a frequency selective surface (FSS) layer above the base surface, where the FSS layer includes a plurality of conductive patches separated from one another. Each of the flexible conductors electrically connects one of the conductive patches to the base surface. A latch mechanism is arranged between the base layer and the FSS layer. An inflatable bladder system between the base layer and the FSS layer is configured to receive a gas input during deployment of the antenna apparatus and inflate to produce force sufficient to cause the latch mechanism to transition from an unlatched state to a latched state in which the conductive base surface is fixedly separated from the FSS layer at a predetermined distance.

A container for shipping a satellite terminal includes one or more compartments that are configured to partition an internal space of the container and securely receive one or more parts of the satellite terminal. The container further includes one or more devices that are configured to secure the parts and prevent them from being moved or damaged. The container, the compartments and the devices are of high-strength materials that bear a weight of the parts and external shocks.

A communications system including a telescopic antenna, a deployment motor configured to apply an extension force to the telescopic antenna for extending the telescopic antenna in response to a communications frequency, a transceiver for transmitting a transmit signal at the communications frequency, and a signal meter for determining the magnitude of a return signal from the telescopic antenna received in response to the transmission of the transmit signal and wherein the deployment motor is further configured to adjust an extension of the telescopic antenna in response to the magnitude of the return signal.