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searching for Radiation pattern 110 found (344 total)

alternate case: radiation pattern

IEEE 802.15.6 (550 words) [view diff] exact match in snippet view article find links to article

presence of a person (varying with male, female, skinny, heavy, etc.), radiation pattern shaping to minimize the specific absorption rate (SAR) into the body

ground conditions at particular locations, the underlying geology, radiation pattern of the seismic waves, and the response of different types of buildings

antennas are independent of frequency: the driving point impedance, radiation pattern and polarization of such antennas remain unchanged over a large bandwidth

The J-pole antenna, more properly known as the J antenna, is a vertical omnidirectional transmitting antenna used in the shortwave frequency bands. It

licence to change CIWS-FM's class from LP to A, changing the antenna's radiation pattern from non-directional to directional, increasing the average effective

ERP), raising antenna height, relocate the transmitter and changing radiation pattern from non-directional to directional. During this time, the station

pointed into space or staring into the sun. For an antenna with a radiation pattern given by G(θ, φ), the noise temperature is mathematically defined

carried in its upper guys insulators in order not to disturb the radiation pattern of the mediumwave transmitter. After termination of the AM transmissions

membranes and demonstrations of SHG in complex nanomaterials. The SHG radiation pattern generated by an exciting Gaussian beam also has a (homogeneous) 2D

and thought, one will realize that all local structures affect the radiation pattern whether by reflection, absorption, refraction, fringing, or as part

All of these variations are characterised by a "figure-of-eight" radiation pattern in which the loudness falls towards the sides of the enclosure where

207 kHz requires, according to the Geneva Frequency Plan a directional Radiation Pattern for whose Realization a second Mast was required. This Mast could

were 240 metres apart. As this antenna had an unfavourable vertical radiation pattern, which produced much skywave resulting in a too small fading-free

Acoustic lobing refers to the radiation pattern of a combination of two or more loudspeaker drivers at a certain frequency, as seen looking at the speaker

wires, requiring some careful engineering so as not to affect the radiation pattern adversely. † Monochrome initially, colour TV service started September

(390 ft) apart from each other, what formed a slightly directional radiation pattern directed towards Spanish Madrid transmitter on the same frequency

frequency transmitter, which operated permanently with omnidirectional radiation pattern. FM and TV broadcasts are transmitted using a 220 metre tall guyed

modified 2018-05-16. Retrieved 2015-09-11. Technical information from the IFT Coverage Viewer. RPC: #029759 Change in Radiation Pattern - XHSIC-FM v t e

beamwidth of the main lobe, representing an increase in the signal of the radiation pattern in a single direction, while simultaneously reducing the usually undesirable

14 GHz and 25 GHz, an RF MEMS radiation pattern reconfigurable spiral antenna for 6 and 10 GHz, an RF MEMS radiation pattern reconfigurable spiral antenna

primary propagation is by surface wave. It also affects the real world radiation pattern of high frequency (3-30 MHz) antennas, as the so-called "takeoff angle"

watts (maximum ERP from 50 to 4,000 watts), changing the antenna's radiation pattern from non-directional to directional and decreasing its effective height

above average terrain from 124.8 to 137.5 metres, by changing the radiation pattern of the antenna from non-directional to directional, and by relocating

insulated guyed steel framework mast was installed to shape the radiation pattern with a minimum towards the southeast, in order to avoid interferences

(average ERP from 2,060 to 1,320 watts), and changing the antenna's radiation pattern from directional to non-directional; and decreasing the height of

5° by means of optical aspect detectors and the use of the known radiation pattern of the vehicle antenna. Telemetry was provided only in real time by

This phased-array directional antenna produces a broad cardioid radiation pattern with a maximum gain directed west. Emergency stand-by transmitters

watts (maximum ERP from 347 to 700 watts) and changing the antenna's radiation pattern from directional to non-directional. All other technical parameters

ERP). Antenna height will be -29.63 metres with a non-directional radiation pattern. The CRTC approved the CBC's application to move CBNZ to 95.1 FM on

interfere with each other. A dipole enclosure has a figure-of-eight radiation pattern, which means that there is a reduction in sound pressure, or loudness

communication reflector antennas. It ensures excellent impedance matching and radiation pattern performance across the entire operating frequency band. Balanis, Constantine

antipodal Vivaldi antenna with exponential slot edge for improved radiation pattern". IEEE Antennas Wirel. Propag. Lett. 14: 1334. Bibcode:2015IAWPL.

{\displaystyle \omega ^{2}} ). Scattered waves are emitted in a short dipole radiation pattern. The variable phase shift present in semi-collisional scattering regimes

track the frequency of the transmitter. An antenna with a suitable radiation pattern, which transmits well vertically upwards and is efficient over the

integrated into an antenna assembly, the reflector serves to modify the radiation pattern of the antenna, increasing gain in a given direction. Common integrated

application to change the authorized contours of CHYQ‑FM by changing the radiation pattern of the antenna from directional to non-directional, by decreasing

modified 2018-05-16. Retrieved 2015-07-10. Technical information from the IFT Coverage Viewer. RPC: #021315 Change in Radiation Pattern - XHEI-FM v t e

the signal path allows additional opportunities for tailoring the radiation pattern for maximum performance. For example, the gain of ordinary parabolic

original FM transmissions with horizontal polarisation and with a radiation pattern favouring the town of Brecon. The launch of Radio Cymru saw the replacement

to the station for 9.7 watts and an omini-directional pattern. The radiation pattern was so efficient with 9.7 watts, that the signal from the 5/8-wavelength

the same, but the vertical opening angle was reduced (so flatter radiation pattern). Because the horizontal opening angle was not changed, the bearing

criterion, the diameter of a parabolic dish required to create a radiation pattern with a given angular beamwidth (gain) is proportional to the wavelength

after the main earthquake. Further analysis of Love waves, whose radiation pattern gives greater discrimination on low-angle dips, indicate that the

of the station's rebroadcaster in Hearst, by changing the antenna radiation pattern from directional to non-directional, increasing the average effective

antenna height from 55.5 to 67.2 metres (EHAAT) with a non-directional radiation pattern. Kipawa Radio Station Drumbeat Radio CKFF 104.1 FM - explorekipawa

in the phasing line led to a phase displacement of the antenna's radiation pattern and with that, a squinting to the left or right. This enabled the

the ground. To prevent the conductive guy lines from disturbing the radiation pattern of the antenna, additional strain insulators are sometimes inserted

above average terrain from 150.0 to 137.5 metres, by changing the radiation pattern of the antenna from non-directional to directional, and by relocating

antennas are frequency-independent antennas, that is, antennas whose radiation pattern, impedance and polarization remain largely unmodified over a wide

dispersion relations. Antennas: Dipole antennas; antenna arrays; radiation pattern; reciprocity theorem, antenna gain. Network graphs: matrices associated

the radiation patterns caused by B and B' must be the same as the radiation pattern of the unobstructed beam. In places where the undisturbed beam would

Types of two-mirror optical cavities, with mirrors of various curvatures, showing the radiation pattern inside each cavity.

strength from side and backlobes and thus getting radar antennae radiation pattern, false targets can be created to directions other than one where the

the system at all, rather it relied on a heavily distorted dipole radiation pattern using a single transmitter. Instead of 'beams' it used a single heavily

Mostafa (2019). "Microstrip patch antenna array with cosecant-squared radiation pattern profile" (PDF). AEU — International Journal of Electronics and Communications

mounted at the throat of a horn for added output level and control of radiation pattern. A tweeter is a high-frequency driver that reproduces the highest

& maximum ERP). Antenna height will be 182 metres (EHAAT) and the radiation pattern will be non-directional. As well this new FM transmitter will serve

Channel Frequency (MHz) Multiplex Programs RDS PS ERP (kW) Radiation pattern non-directional/omnidirectinal (ND) directional (D) Polarization horizontal

NVIS radiation pattern While the groundwave (blue) cannot propagate, the refracted skywaves (red) achieve HF coverage within the common first hop (~500 km

characteristics of sonar devices designed for frequency response calibrations, radiation pattern plots, and impedance and admittance characterizations. Additionally

difference is applied at the middle of the wire tagged 1, while the RP (radiation pattern) sets up some specifics of the signal. Finally the EN line (end of

The dielectric loading of a microstrip antenna affects both its radiation pattern and impedance bandwidth. As the dielectric constant of the substrate

Oliner and T. Tamir, "Guided complex wave, part II: relation to radiation pattern", Proc. IEE, Vol. 110, pp. 325–334, February 1963. A. Hessel, "General

Transmitting from Mt Mumbulla @ ~5Kw ERP with an Omnidirectional radiation pattern. Primary coverage area is the Bega Valley, Tathra, Bermagui, Wolumla

to be located in what is referred to as the far field zone of the radiation pattern. In closer proximity to the transmitter, i.e., in the "near field"

kilowatt at one kilometre) with high power gives a poor vertical radiation pattern, and 195 electrical degrees (about 400 millivolts per meter using

Radiation pattern of an antenna with main lobe (right) in red, and back lobe in blue

the two side antennas were powered at any given time, the resulting radiation pattern was a cardioid. The key to the Sonne system was a further modification

guys were chosen in such way, that there is no disturbation of its radiation pattern when grounded directly at the anchor blocks. So the upper guys do

apex, you could have a speaker with a perfect 360-degree horizontal radiation pattern available to reproduce all the audible frequency range. The vertical

surface waves. Furthermore, control of the radio frequency or microwave radiation pattern is efficiently increased, and mutual coupling between antennas is

radiator is available on the site, which only allows an omnidirectional radiation pattern. The grounding system of the long wave transmitter is very large.

part of this configuration, characteristics such as the antenna's radiation pattern are entirely changed in comparison to a conventional monopole antenna

variations in front of microwave antennas. Determination of a far-field radiation pattern constitutes the primary application of antenna near-field scanners

Antenna height will rise from 81.5 to 116.6 metres (EHAAT). The radiation pattern will remain directional. On November 23, 2022, dignitaries from Bayshore

be lowered from 149.1 to 140.5 metres (490' to 460') (EHAAT). The radiation pattern will remain non-directional. On 7 September 2022 the CRTC approved

dispersion relations. Antennas: Dipole antennas; antenna arrays; radiation pattern; reciprocity theorem, antenna gain. Additional basic fundamental in

forming an antenna. This structure has the capability of generating a radiation pattern to launch an electromagnetic wave in a specific relatively narrow

open baffle, or a push-pull arrangement, which produces a bipolar radiation pattern similar to that of the electrostatic membrane.[citation needed] This

bounded domain so that the resulting material has the a priori chosen radiation pattern. Moreover, a method for calculating the density of these particles

This complicated shape was found by an evolutionary computer design program to create the best radiation pattern. It is known as an evolved antenna.

forced to redo the plan for a three-tower array. The three-tower radiation pattern only covered 70 percent of the area, prompting the commission to withhold

the X-ray range. Another dramatic effect of relativity is that the radiation pattern is distorted from the isotropic dipole pattern expected from non-relativistic

other six idealized experiments (microscope, split beam, tilt-teeth, radiation pattern, one-photon polarization, and polarization of paired photons), imposes

directional antenna, whose maxima point in an East–West direction. This radiation pattern ensured that the Topolná transmitter can be received clearly in all

Hispanic audiences in Cuba were stymied due to the station's ineffective radiation pattern. Forced to continue broadcasting or lose the frequency, Rivers introduced

000 yards (910 m) to 160 nautical miles (300 km; 180 mi) Antenna radiation pattern Horizontal 2.8-degree Vertical 30 deg cosecant2 (elevation angle)

corresponding to one-half of its wavelength, and an omnidirectional signal radiation pattern. The top half of each antenna tower has a quarter-wavelength radiating

synchronize with the WWVB time code during local nighttime hours. The radiation pattern of WWVB antennas is designed to present a field strength of at least

the contour of the ground close to the station on their vertical radiation pattern. During those first years the site was subject to attempts at destruction

Germany was moved 102 metres northwards in order to realize a better radiation pattern of the transmitter. This was perhaps the tallest object ever moved

1940s. On the order of a million optical antennas are used to see a radiation pattern of a certain size in a certain direction. To achieve this the phase

characterization of full-scale, aerodynamic vehicles and antenna radiation pattern development. Due to its remote, secure environment, it can also accommodate

Anatoly (2017). "Multi-polarization antenna system with a spherical radiation pattern". 2017 IEEE International Conference on Microwaves, Antennas, Communications

Both the radiation pattern and the total emitted power (which is proportional to the decay rate) of a dipole depend on its distance from a mirror.

the shifting of the main lobe of a multi-way loudspeaker system's radiation pattern with frequency, or other unwelcome off-axis effects. With less frequency

for this - although the MTM's on-axis response is near perfect, its radiation pattern or main lobe is much narrower than that of the MT or TM configuration's

Labs Jet Propulsion Laboratory Electrotechnical Laboratory Thesis Radiation pattern synthesis with sources located on a conical surface  (1958) Doctoral

and bipole speakers designs (RM-V60 and RM-50) to better mimic the radiation pattern of live acoustic musical instruments. "TechTV, Best of CES 2002, High-end

directionality is more pronounced in the vertical dimension, yielding a radiation pattern that is wide but not tall. This helps reduce the amount of low-frequency

|W|^{2}|s(k_{\text{surf}})|^{2}} where | W | 2 {\displaystyle |W|^{2}} is the radiation pattern from a single dipole at the metal/dielectric interface. If surface

their currents, forming a single antenna usually to achieve a desired radiation pattern Directional array, an antenna array optimized for directionality Phased

as a parasitic radiator it may also affect or distort the antenna radiation pattern. Similar radial wires can be placed on the top of antennas (instead

equally spaced holed were drilled in the face (this did not affect the radiation pattern). The drive mechanism was completely redesigned, using technology

as outgoing and incoming radiation are essentially balanced. This radiation pattern, along with temperature and wind, influence the appearance of the

Oliner and T. Tamir, "Guided complex wave, part II: relation to radiation pattern," Proc. IEE, Vol. 110, pp. 325-334, February 1963. A. A. Oliner, \Leaky-Wave

⁡ θ   {\textstyle k_{z}=k~\cos \theta ~} Stated another way, the radiation pattern of any planar field distribution is the FT (Fourier Transform) of

component calibration and evaluation such as a spot scan microscope, a radiation pattern plotter, and constant temperature burn-in racks for LEDs. He also

"weighting functions" is used to reduce the spatial sidelobes of the radiation pattern. Although spectral shaping of a chirp could be applied in the frequency

spaced holes were drilled in the face (this had no effect on the radiation pattern). The drive mechanism was completely redesigned, using technology