A compact antenna for centimetric frequency bands includes an active planar element forming a radiator, coupled to an input of a receiver circuit and/or to the output of an emitter circuit, and a passive planar element forming a reflector. The passive planar element is formed by a periodic structure of the metamaterial type comprising a network of resonating cells, in particular cells of the complementary concentric slit-ring type Complementary Split-Ring Resonator (CSRR). A clip-shaped support made of a dielectric material supports the active planar element and the passive planar element.

An armor plate system includes an integrated damage detector which may permit field testing of an armor plate. The system includes a ceramic plate and a piezoelectric transducer attached to lateral face of the ceramic plate. The piezoelectric transducer may apply a signal to the ceramic plate and receive a reflected signal. The applied signal may form a compression wave. An ultrasonic signal may be applied.

An armor system with a composite laminate having at least four alternating layers (two bi-layers) of a first material and a second material, the first material having a lower acoustic impedance than the second material. The first material is an elastomer and the second material can be a hard material such as steel, aluminum, or ceramic, or an elastomer with a higher acoustic impedance than the first material. The laminate can include many alternating layers of the first and second materials, and can be adhered or affixed to a thicker armor substrate. Additional protective elements such as corrugated metal-ceramic panels and armored glass cylinders can be added to improve resistance to armor piercing rounds, explosively formed penetrators, or other threats.

An armor system with a composite laminate having at least four alternating layers (two bi-layers) of a first material and a second material, the first material having a lower acoustic impedance than the second material. The first material is an elastomer and the second material can be a hard material such as steel, aluminum, or ceramic, or an elastomer with a higher acoustic impedance than the first material. The laminate can include many alternating layers of the first and second materials, and can be adhered or affixed to a thicker armor substrate. Additional protective elements such as corrugated metal-ceramic panels and armored glass cylinders can be added to improve resistance to armor piercing rounds, explosively formed penetrators, or other threats.

An improved RPG shield netting that comprises a net structure supporting a spaced arrangement of one-piece nodes manufactured using an insert injection molding process such that each node is formed as a one-piece three-dimensional solid shape with uniform surfaces that envelopes a portion of one or more cord elements.

An ammunition storage compartment includes a plurality of connected walls defining an interior region to store ammunition, wherein at least one of the walls includes an outer armor plate having an outer surface and an inner surface. A layer of energy absorbing material is located proximate the inner surface of the armor plate in the interior region. A spall mitigating panel is located inward of the layer of energy absorbing material in the interior region. At least one air gap is in between the layer of energy absorbing material and the spall mitigating panel.

The instant disclosure seeks to provide a ballistic armor carrier system for cellulose-based ballistic armor wearable by a user. The system includes front and back cellulose-based ballistic armor and a ballistic armor carrier that is configured to support the front and back cellulose-based ballistic armor. The front and back cellulose-based ballistic armor each comprise printed literature. The ballistic armor carrier includes front and back pockets; a pair of shoulder straps coupled proximate to the top of both the front pocket and the back pocket; and a pair of waist straps coupled proximate to the bottom the both the front pocket and the back pocket. The front cellulose-based ballistic armor is demountably positioned within the front pocket. The back cellulose-based ballistic armor is demountably positioned within the back pocket. The front cellulose-based ballistic armor and the back cellulose-based ballistic armor comprise one or more pieces of printed literature.

The instant disclosure seeks to provide a ballistic armor carrier system for cellulose-based ballistic armor wearable by a user. The system includes front and back cellulose-based ballistic armor and a ballistic armor carrier that is configured to support the front and back cellulose-based ballistic armor. The front and back cellulose-based ballistic armor each comprise printed literature. The ballistic armor carrier includes front and back pockets; a pair of shoulder straps coupled proximate to the top of both the front pocket and the back pocket; and a pair of waist straps coupled proximate to the bottom the both the front pocket and the back pocket. The front cellulose-based ballistic armor is demountably positioned within the front pocket. The back cellulose-based ballistic armor is demountably positioned within the back pocket. The front cellulose-based ballistic armor and the back cellulose-based ballistic armor comprise one or more pieces of printed literature.

An armoring part for a vehicle includes a steel plate made of at least partially hot formed and press hardened armor steel and having a hardness of 380 to 760 Vickers (HV). Applied on at least one side of the steel plate is a coat which is made of a metal material which is softer than a metal material of the armor steel. The coat is a thermally applied layer and has a hardness of 10 to 230 Vickers (HV).

This invention relates to a process for the preparation of an antiballistic article, the method comprising: a) Providing a transparent uniaxially stretched polymeric film with at least one layer I comprising a semi-crystalline thermoplastic polymer A and at least one layer II comprising an amorphous or semi-crystalline thermoplastic polymer B, of which polymer B has a glass transition temperature less than the melting temperature of polymer A if polymer B is amorphous or of which polymer B has a melting temperature less than the melting temperature of polymer A if polymer B is semi-crystalline; b) Stacking at least two of the uniaxially stretched polymeric films of a) at an angle a of between 45° and 135°, such that the films are in contact with each subsequent film through at least one layer II, to form an assembly; c) Compressing the thus formed assembly at a temperature above the glass transition temperature of polymer B if polymer B is amorphous, or above the melting temperature of polymer B if polymer B is semi-crystalline, and below the melting temperature of polymer A, to obtain an haze of at most 50% and having an energy absorption for 17 grain FSP according to the STANAG 2920 standard of at least 12 J/(kg/m.sup.2). The invention also relates to antiballistic articles.