X-band slotted waveguide marine radar antenna on ship, 8–12 GHz. The antenna radiates a narrow vertical fan-shaped beam of microwaves, scanning the entire 360° water surface around the ship with each rotation.
Cross section of similar marine radar antenna with part of plastic radome removed, showing slots in waveguide.
Seeker of the Kh-35E anti-ship missile with slotted antenna.
A slot antenna consists of a metal surface, usually a flat plate, with one or more holes or slots cut out.[1] When the plate is driven as an antenna by an applied radio frequency current, the slot radiates electromagnetic waves in a way similar to a dipole antenna. The shape and size of the slot, as well as the driving frequency, determine the radiation pattern. Slot antennas are usually used at UHF and microwave frequencies at which wavelengths are small enough that the plate and slot are conveniently small. At these frequencies, the radio waves are often conducted by a waveguide, and the antenna consists of slots in the waveguide; this is called a slotted waveguide antenna. Multiple slots act as a directive array antenna and can emit a narrow fan-shaped beam of microwaves. They are used in standard laboratory microwave sources used for research, UHF television transmitting antennas, antennas on missiles and aircraft, sector antennas for cellular base stations, and particularly marine radar antennas. A slot antenna's main advantages are its size, design simplicity, and convenient adaptation to mass production using either waveguide or PC board technology.
A slotantenna consists of a metal surface, usually a flat plate, with one or more holes or slots cut out. When the plate is driven as an antenna by an...
aircraft to reduce the stall speed Slotantenna, a directional antenna consisting of a slot in a piece of metal Airport slot, a right allocated to an airline...
A Vivaldi antenna or Vivaldi aerial or tapered slotantenna is a co-planar broadband-antenna, which can be made from a solid piece of sheet metal, a printed...
17, No. 4 pp.235-236 Patch Antenna Tutorial EM Talk The basics of patch antennas A Dual-Band Rectangular CPW Folded SlotAntenna for GNSS Applications...
receiving antennas. For television broadcasting specialized vertical radiators that are mostly modifications of the slotantenna or reflective array antenna are...
The Moxon antenna or Moxon rectangle is a simple and mechanically rugged two-element parasitic array, single-frequency antenna. It takes its name from...
("dish") antennas are the most widely used directive antennas at microwave frequencies, but horn antennas, slotantennas and lens antennas are also used...
this antenna in 1946. It is very popular in the United States. The antenna can be erected as horizontal dipole, as sloper, or an inverted-V antenna. With...
distinction arises solely from different desirable radiation patterns of the antennas (near vertical for NVIS, near horizontal for conventional long-range skywave...
microstrip antenna may be understood as a pair of equivalent slots. These slots act as an array and have the highest directivity when the antenna has an air...
directional antenna or beam antenna is an antenna which radiates or receives greater radio wave power in specific directions. Directional antennas can radiate...
less susceptible to common mode noise and cross talk. Antenna selection: dipole, tapered slotantenna (TSA) Examples: coplanar strip, slotline Single-ended...
cheese antenna, also known as a pillbox antenna, is a type of microwave-frequency parabolic antenna used in certain types of radar. The antenna consists...
A horn antenna or microwave horn is an antenna that consists of a flaring metal waveguide shaped like a horn to direct radio waves in a beam. Horns are...
antenna elements, such as aerials or rows of slotted waveguide. Each antenna element or group of antenna elements incorporates a discrete phase shift...
A transmitarray antenna (or just transmitarray or called as layered lens antenna) is a phase-shifting surface (PSS), a structure capable of focusing electromagnetic...
The Sloper Antenna is a slanted Dipole antenna. While horizontal dipoles required two large support masts, this antenna type only needs one large mast...
typical example of a uniform leaky-wave antenna is an air-filled rectangular waveguide with a longitudinal slot. This simple structure illustrates the...
РЛСУ-27) AWCS for Su-27M is a multirole DSP radiolocator based on a slotantenna (developing process started in 1982) Radiolocator Targeting Complex Osa...
In antenna theory, a phased array usually means an electronically scanned array, a computer-controlled array of antennas which creates a beam of radio...
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