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A beam waveguide antenna is a particular type of antenna dish, at which waveguides are used to transmit the radio beam between the large steerable dish
Beam_waveguide_antenna
Type of antenna used for various communication
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
Slot_antenna
Type of parabolic antenna with a convex secondary reflector
must be longer for a given wavelength. A beam waveguide antenna is a type of complicated Cassegrain antenna with a long radio wave path to allow the feed
Cassegrain_antenna
Funnel-shaped waveguide radio device
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
Horn_antenna
S-band downlink. As of 2017, the 34 m antennas are being decommissioned. The 34 m BWG Subnet (beam waveguide antenna) (DSS-24, DSS-25, DSS-26, DSS-34, DSS-54)
List of antennas in NASA's Deep Space Network
List_of_antennas_in_NASA's_Deep_Space_Network
Hollow metal pipe used to carry radio waves
feed radio waves to the antenna. By March 1936, he had derived the propagation modes and cutoff frequency in a rectangular waveguide. The source he was using
Waveguide_(radio_frequency)
Interplanetary radio communication station
has been ongoing construction since 2010 building additional 34 m beam waveguide antenna. Construction of DSS-35 began in July 2010. The station's collimation
Canberra Deep Space Communication Complex
Canberra_Deep_Space_Communication_Complex
Microwave antenna
antenna to be a manageable size. The lens can be made of a dielectric material like plastic, or a composite structure of metal plates or waveguides.
Lens_antenna
Type of antenna
called a dish antenna or parabolic dish. It functions similarly to a searchlight or flashlight reflector to direct radio waves in a narrow beam, or receive
Parabolic_antenna
array or slotted waveguide antenna, squint refers to the angle that the transmission is offset from the normal of the plane of the antenna. In simple terms
Squint_(antenna)
Region of the radiation pattern of an antenna
loudspeakers. Antenna boresight Antenna gain Beam radio navigation Beam waveguide antenna Beamwidth Side lobe Software defined antenna This article incorporates
Main_lobe
Array of antennas creating a steerable beam
In antenna theory, a phased array usually means an electronically scanned array, a computer-controlled array of antennas which creates a beam of radio
Phased_array
Network of radio communication facilities run by NASA
antennas. There are: Three or more 34-meter (112 ft) Beam waveguide antennas (BWG) One 70-meter (230 ft) antenna. Five of the 34-meter (112 ft) beam waveguide
NASA_Deep_Space_Network
Passive electronic component used for RF beamforming
allows multiple antenna beams to be formed without the need for phase shifters. It consists of a range of input ports (also called beam ports) and output
Rotman_lens
Cable or conductor connecting a radio transmitter to an antenna
transmitter or receiver to the antenna must be a special type of cable called transmission line. At microwave frequencies, waveguide is often used, which is
Antenna_feed
Communications facility of JAXA
beam waveguide antennas, an older 64 meter antenna and a newer 54 meter dish. Usuda was the first deep-space antenna constructed with beam-waveguide technology
Usuda_Deep_Space_Center
Single-pulse radar system
antenna beam. The signal strength from each delta beam increases as the aircraft drifts further away from the antenna center-line. For the waveguide image
Monopulse_radar
Deep-space communications complex in Spain
more generally as comprising one 70 m antenna, four 34 m beam-waveguide antennas and one 34 m Cassegrain antenna, and adds that a new 34 m tower was under
Madrid Deep Space Communications Complex
Madrid_Deep_Space_Communications_Complex
Physical transmission device
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
Microwave_antenna
Antenna constructions for different applications
waveguide with one or more slots cut in it to emit the microwaves. Linear slot antennas emit narrow fan-shaped beams. Used as UHF broadcast antennas and
Antenna_types
Antenna using a traveling wave
radiating wave. A typical example of a uniform leaky-wave antenna is an air-filled rectangular waveguide with a longitudinal slot. This simple structure illustrates
Leaky_wave_antenna
Electromagnetic radiation with wavelengths from 1 m to 1 mm
invented waveguide in 1936. Barrow invented the horn antenna in 1938 as a means to efficiently radiate microwaves into or out of a waveguide. In a microwave
Microwave
Device that transmits and receives radio waves
preferentially in a particular direction (directional, or high-gain, or "beam" antennas). An antenna may include components not connected to the transmitter, parabolic
Antenna_(radio)
American scientist (1922–2007)
his work in radar and antenna design. Among his inventions were the Rotman lens, the sandwich wire antenna, and the trough waveguide. Walter Rotman was born
Walter_Rotman
Range 3-30 GHz of the electromagnetic spectrum
long waveguide runs, in many microwave antennas the output stage of the transmitter or the RF front end of the receiver is located at the antenna. SHF
Super_high_frequency
Object detection system using radio waves
long radar waveguide between the radar transceiver and the antenna. In a typical plan position indicator (PPI) radar with a rotating antenna, this will
Radar
Technical design of the components of a radar and its operation
a highly directive beam. This is done electronically, with a phased array antenna, or mechanically by rotating a physical antenna. The emitter and the
Radar_engineering
of the feed energy is reflected back into the feed antenna and does not contribute to the main beam) Illumination taper (feed illumination reduced at the
Reflector_(antenna)
Antenna with a fractal shape
integrated with antennas, they are considered parts of some antenna systems and thus are discussed in the context of fractal antennas. Waveguide (electromagnetism)
Fractal_antenna
Navy missile target and guidance radar
AN/SPG-55B antenna assembly consists of two separate antennas: the main antenna, which provides the track beam, guidance beam, and cwi beam, and the capture
AN/SPG-55
multifrequency antenna with RF-MEMS switches", Sept. 15, 2009. Jung, C.; Lee, M.; Li, G.P.; DeFlaviis, F. (February 2006). "Reconfigurable Scan-Beam Single-Arm
Radio-frequency microelectromechanical system
Radio-frequency_microelectromechanical_system
Radio technology devices
measurement or monitoring, feedback, combining feeds to and from antennas, antenna beam forming, providing taps for cable distributed systems such as cable
Power dividers and directional couplers
Power_dividers_and_directional_couplers
Method for multiplexing signals
the antenna in space. A dual polarization system comprises usually two independent transmitters, each of which can be connected by means of waveguide or
Polarization-division multiplexing
Polarization-division_multiplexing
Telecommunications device
and its antenna to improve power transfer between them by matching the impedance of the radio RF port (coaxial or waveguide) to the antenna's feedline
Antenna_tuner
Type of beamforming network
network used to feed a phased array of antenna elements. Its purpose is to control the direction of a beam, or beams, of radio transmission. It consists
Butler_matrix
Spherically symmetric gradient-index lens
used as the basis of a high-gain radio antenna. A Luneburg lens antenna is comparable to a parabolic dish antenna, but uses the lens rather than a parabolic
Luneburg_lens
Network of space-tracking stations of the European Space Agency
- DSA 1". Retrieved 26 October 2024. ESA. "ESA inaugurates deep space antenna in Australia". Retrieved 7 October 2025. esa. "Kiruna station". Retrieved
ESTRACK
Optical waveguide
"waveguide below-cutoff attenuator." The zero-mode waveguide is made possible by creating circular or rectangular nanoapertures using focused ion beam
Zero-mode_waveguide
Class of antennas
the subsystems. Antenna subsystems that are currently being researched include cavity resonators, waveguides, scatters and antennas (radiators). By integrating
Metamaterial_antenna
Type of parabolic antenna
A satellite dish is a dish-shaped type of parabolic antenna designed to receive or transmit information by radio waves to or from a communication satellite
Satellite_dish
Measurement of the direction from which a received signal was transmitted
users. Antennas for DF have to meet different requirements from those for a radar or communication link, where an antenna with a narrow beam and high
Direction_finding
Radio telescope in Warkworth Radio Astronomical Observatory, New Zealand
satellite. The telescope is a 30-metre Cassegrain wheel-and-track beam waveguide antenna. It was manufactured in 1983 by Nippon Electric Corp., and was first
Warkworth_30m_Radio_Telescope
3–30 kHz range of the electromagnetic spectrum
and the main mode of long-distance propagation is an Earth–ionosphere waveguide mechanism. The Earth is surrounded by a conductive layer of electrons
Very_low_frequency
Type of radio-signal reflector
receiving the signal with a parabolic antenna and leading it through a waveguide to a second parabolic antenna, where it is radiated. For passive microwave
Passive_repeater
Receiving device on satellite dishes
a section of waveguide. One or more metal pins, or probes, protrude into the waveguide at right angles to the axis and act as antennas, feeding the signal
Low-noise_block_downconverter
Concept of collecting solar power in outer space and distributing it to Earth
if a transmitting satellite's beam were to wander off-course. But the necessarily vast size of the receiving antennas would still require large blocks
Space-based_solar_power
Parameter characterizing an AC conductor
electrical shortening mean adding reactance (capacitance or inductance) to an antenna or conductor to increase or decrease its electrical length, usually for
Electrical_length
Transmission of information via microwaves
sized antennas to direct them in narrow beams, which can be pointed directly at the receiving antenna. This use of tightly focused direct beams allows
Microwave_transmission
from a source antenna to produce a high-gain beam. Transmitarrays consist of an array of unit cells placed above a source (feeding) antenna. Phase shifts
Transmitarray_antenna
Device or system that exhibits resonance
high gain antenna in the case of radar. The klystron, tube waveguide, is a beam tube including at least two apertured cavity resonators. The beam of charged
Resonator
Type of antenna
(or feedhorn) is a small horn antenna used to couple a waveguide to e.g. a parabolic dish antenna or offset dish antenna for reception or transmission
Feed_horn
German physicist (1857–1894)
(although the actual prize had expired uncollected in 1882). He used a dipole antenna consisting of two collinear one-meter wires with a spark gap between their
Heinrich_Hertz
Microwave network module
talk. Antenna selection: double folded slot (DFS), microstrip, monopole Examples: CPW, microstrip, stripline Waveguide Antenna selection: waveguide, horn
Phase_shift_module
Study and design of microwaves
beam of EM radiation. The foundations of this discipline are found in Maxwell's equations and the work of Heinrich Hertz, William Thomson's waveguide
Microwave_engineering
Type of electromagnetic radiation
range, such as the waveguide of a working radio transmitter, can cause damage to the lens of the eye by heating. A strong enough beam of radio waves can
Radio_wave
Radar used to locate and monitor meteorological conditions
using a cavity magnetron or klystron tube connected by a waveguide to a parabolic antenna. The wavelengths of 1 – 10 cm are approximately ten times the
Weather_radar
Electromagnetic spectrum, 3 Hz – 3000 GHz
amounts of power, so the power in a beam of radio waves decreases exponentially with distance from the transmitting antenna. At 30 GHz, useful communication
Radio_spectrum
Aspect of a lens or reflector
more attenuated they get coupled into the waveguide. On the other hand, the more the distance between antenna surface and feed horn varies, the bigger
Focal_cloud
USAAF WWII-era airborne radar bombsight
1942, a team working on the antenna problem had developed an initial concept consisting of a long rectangular waveguide with small slots cut into the
AN/APQ-7
Materials engineered to have properties that have not yet been found in nature
metamaterials can be integrated with for instance silicon waveguides to develop and polarization beam splitters and optical couplers, adding new degrees of
Metamaterial
ISRO's observatory
mount utilizes wheel-and-track system for azimuth motion. Built in a beam waveguide configuration, this state-of-the-art system has supported the Chandrayaan-1
Indian_Deep_Space_Network
Device for generating microwaves
and phase is unimportant. In a radar set, the magnetron's waveguide is connected to an antenna. The magnetron is operated with very short pulses of applied
Cavity_magnetron
Vacuum tube used to generate microwaves
electron beam, the original signal travels at right angles to the beam. This is normally accomplished by drilling a hole through a rectangular waveguide and
Backward-wave_oscillator
cylindrical parabolic antenna at Ooty Radio Telescope Complex near Ooty, Tamil Nadu, India (Early 1970s) The 70 meter DSS 14 "Mars" antenna at Goldstone Deep
List_of_radio_telescopes
Computer program for antenna modeling
It can be used for, but is not well suited to, slotted waveguide antennas, fractal antennas or similar designs in which the component conductive elements
Numerical Electromagnetics Code
Numerical_Electromagnetics_Code
Branch of physics
calculate antenna radiation pattern for an arbitrarily shaped antenna structure). Also calculating power flow direction (Poynting vector), a waveguide's normal
Computational electromagnetics
Computational_electromagnetics
Computational electrodynamics technique
strong benefits compared with FDTD, FEM and the beam propagation method for the modelling of optical waveguides, and it is a popular tool for the modelling
Eigenmode_expansion
Distance at which ground targets are hidden
as frequency drops. Below 3 MHz, the whole volume of the air acts as a waveguide to fill in the radar shadow and also reduces radar sensitivity above the
Radar_horizon
Mixed-use commercial complex in Holmdel, New Jersey
Harald Friis's radio research group at Holmdel, drew on the site's waveguide and antenna research and was opened for experimental service in November 1947
Bell_Labs_Holmdel_Complex
Range 300-3000 GHz of the electromagnetic spectrum
waveguide with variable radius, based on Smith–Purcell and Cherenkov mechanisms". Nuclear Instruments and Methods in Physics Research Section B: Beam
Terahertz_radiation
great strides in technique were being made in cavity magnetron, waveguide, antenna design and general electronics. Those upgrades that could be easily
Type_277_radar
Behaviour of travelling radio waves
waves which travel in a straight line from the transmitting antenna to the receiving antenna. Line of sight transmission is used for medium-distance radio
Radio_propagation
Full range of electromagnetic radiation frequencies
lower-frequency radio waves to antennas have excessive power losses at microwave frequencies, and metal pipes called waveguides are used to carry them. Although
Electromagnetic_spectrum
the antenna. It consists of a series of waveguides and feed horns arranged in front of a shaped reflector, each one positioned to reflect the beam in a
Organ-pipe_scanner
then illuminated to the reflector via a waveguide assembly and feed array, creating a group of individual beams stacked vertically to form a wide cosecant
JY-8_Radar
Wi-Fi used for network connectivity
routers: Ubiquiti airFiber Length: 304 km (189 mi). Antenna is 120 cm (4') with handmade waveguide. 35 dBi estimated Another notable unamplified Wi-Fi
Long-range_Wi-Fi
Type of radar equipment
is tangential to the radar antenna beam. Basically, any target that is heading 90 degrees in relation to the antenna beam cannot be detected by its velocity
Doppler_radar
include many types of surface wave antennas: the trough waveguide, the channel waveguide, and the sandwich wire antenna. "At frequencies of a few hundred
History_of_metamaterials
British WWII naval surface search radar
result was to melt the dipole in the transmitting antenna. This led to the adoption of a waveguide and feedhorn, which were being developed at the same
Type_271_radar
Single wire transmission line
low loss antenna feedlines at these frequencies, up to microwave frequencies where a waveguide must be used." A G-line is a type of waveguide, rather than
Goubau_line
US observatory near Barstow, California
which is a U.S. National Historic Landmark. Five large parabolic (dish) antennas are located at the Goldstone site to handle the workload, since at any
Goldstone Deep Space Communications Complex
Goldstone_Deep_Space_Communications_Complex
objective – Despun antenna – Deviation – Dial-up – Diamagnetism – Dielectric constant – Dielectric strength – Dielectric waveguide – Dielectric – Differential
Index_of_electronics_articles
Radar system for the area near an airport
typically consists of a large rotating parabolic antenna dish that sweeps a vertical fan-shaped beam of microwaves around the airspace surrounding the
Airport_surveillance_radar
Optical phenomenon
optical field; a point of zero intensity. The term is also used to describe a beam of light that has such a zero in it. The study of these phenomena is known
Optical_vortex
Type of artificial sheet material
or simultaneously serve beam-steering and polarization-conversion purposes. By interaction Reflective (Reflectarray antenna) – reshape incident waves
Electromagnetic_metasurface
Device used to simulate an electrical load
purposes. In radio a dummy antenna is connected to the output of a radio transmitter and electrically simulates an antenna, to allow the transmitter to
Dummy_load
Family of aircraft radar systems
distribution arrangement in the backplane waveguide feed, and proprietary radiating element placement. Featuring a 700 mm antenna. The Zhuk-MFE offered initial detection
Zhuk_(radar)
Family of phased array radar systems
arrangement of the waveguides and antennas, a concept known as "squint", such that changing the frequency caused the entire beam to rotate vertically
Marconi_Martello
Microwave signal amplifier
along the beam. This structure provides a helical waveguide, and hence amplification can occur via velocity modulation. Helical waveguides have very nonlinear
Traveling-wave_tube
Austrian-born inventor, physicist and architect
October 27, 1964) Beam Collector with Auxiliary Collector for Repelled or Secondarily-Emitted Electrons. (Issued 6 /8, 1965) Antenna System (issued July
Rudolf_Kompfner
introduced in the waveguide. This caused the signal to no longer exactly match the positioning of the radiators in the antenna, and caused the beam to shift.
Plessey_AR-320
English engineer
cladded glass fibre as the transmission medium – "Dielectric-fibre surface waveguides for optical frequencies" – for which he received the Rank Prize in Opto-Electronics
George_Hockham
Definitions of terms used in amateur radio
for use in direction finding or for the benefit of other hams. Beam Antenna An antenna that concentrates signals in a particular direction. BPSK Binary
Glossary_of_amateur_radio
US naval radar
intended to offer search, track and guidance from a single radar system and antenna as part of the Typhon combat system. Paired with the new RIM-50 Typhon
AN/SPG-59
British military radar system
introduced in the waveguide. This caused the signal to no longer exactly match the positioning of the radiators in the antenna, and caused the beam to shift.
Plessey_AR-3D
Property of waves that can oscillate with more than one orientation
also not strictly transverse. Surface waves or waves propagating in a waveguide (such as an optical fiber) are generally not transverse waves, but might
Polarization_(waves)
Physical law
stronger signal or have antenna gain in the direction of the narrow beam relative to a wide beam in all directions of an isotropic antenna. In photography and
Inverse-square_law
Type of radar system
as "cheese" antennas as they resemble a section cut from a wheel of cheese. The feed to the antenna is via a rectangular slot in a waveguide running the
Foster_scanner
Phenomenon resulting from the superposition of two waves
omni-directional antennas. All of the telescopes in the array are widely separated and are usually connected together using coaxial cable, waveguide, optical
Wave_interference
type of antenna developed by George Mueller. This was an end-fired array of 42 pipe-like waveguides that allowed electronic steering of the beam. The Mark
Radar_in_World_War_II
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BEAM WAVEGUIDE-ANTENNA
BEAM WAVEGUIDE-ANTENNA
BEAM WAVEGUIDE-ANTENNA
BEAM WAVEGUIDE-ANTENNA
BEAM WAVEGUIDE-ANTENNA
BEAM WAVEGUIDE-ANTENNA
BEAM WAVEGUIDE-ANTENNA
BEAM WAVEGUIDE-ANTENNA
BEAM WAVEGUIDE-ANTENNA
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