Description : The broadside array consists of a flat reflector and what other elements?
Last Answer : Two or more half-wave dipoles.
Description : When more than two elements are used in a broadside array, how are the elements arranged?
Last Answer : Parallel and in the same plane.
Description : All elements in a beam _____ antennas are in line A. collinear B. yagi C. broadside array D. log-periodic
Last Answer : A. collinear
Description : How many major lobes are produced by a paraboloid reflector?
Last Answer : One.
Description : How many major lobes are radiated by a parabolic reflector?
Last Answer : One
Description : What is the primary difference between the major and minor lobes of a radiation pattern?
Last Answer : Major lobes have the greatest amount of radiation.
Description : Good grounding is important for A. horizontal antennas B. broadside array antennas C. vertical antennas D. Yagi-Uda antennas
Last Answer : C. vertical antennas
Description : ______ is an antenna array which is highly directional at right angles to the plane of the array? A. Broadside array B. End-fire array C. Turnstile array D. Log-periodic array
Last Answer : A. Broadside array
Description : Which is the non-resonant antenna? A. Broadside Antenna B. Folded Dipole C. Rhombic antenna D. End fire array
Last Answer : C. Rhombic antenna
Description : A type of array antenna which consists of one half-wave driven dipole, one reflector and one director A. Hertzian dipole B. Yagi-uda C. Broadside collinear D. Log periodic dipole array
Last Answer : B. Yagi-uda
Description : It consists of a number of dipoles of equal size, equally spaced along a straight line with all dipoles fed in the same phase from the same source. A. Log-periodic antenna B. Yagi antenna C. End-fire array D. Broadside array
Last Answer : D. Broadside array
Description : One ofthe followingconsistsof nonresonant antennas: a.The rhombic antenna b. The folded dipole c. The end-fire array d. The broadside array
Last Answer : a.The rhombic antenna
Description : What is the primary cause of broadside arrays losing efficiency when not operating at their designed frequency?
Last Answer : Lower radiation resistance.
Description : What is the advantage of adding parasitic elements to a Yagi array?
Last Answer : Increased gain.
Description : How is directivity of a collinear array affected when the number of elements is increased?
Last Answer : Directivity increases.
Description : Why is the number of elements used in a collinear array limited?
Last Answer : As more elements are added, an unbalanced condition in the system occurs which impairs efficiency.
Description : What is the maximum number of elements ordinarily used in a collinear array?
Last Answer : Four.
Description : What effect does closer spacing of plates have on the electron beam?
Last Answer : A greater deflection angle.
Description : Where does the major lobe in the end-fire array occur?
Last Answer : Along the major axis
Description : Very low signal strength in antenna. A. Minor lobes B. Null C. Antenna patterns D. Major lobes
Last Answer : B. Null
Description : If the spacing between the conductors increases, the corona effect
Last Answer : If the spacing between the conductors increases, the corona effect Decreases
Description : What is indicated by the number of arrows (closeness of spacing) used to represent an electric field?
Last Answer : The relative strength of the field.
Description : Best description of a collinear and broadside antenna radiation pattern. A. Bidirectional B. Perfect circle C. Unidirectional D. Omnidirectional
Last Answer : A. Bidirectional
Description : The radiation pattern of collinear and a broadside antenna is __
Last Answer : bidirectional
Description : The Yagi antenna is an example of what type of array?
Last Answer : Multielement parasitic array.
Description : What are the disadvantages of the parasitic array?
Last Answer : Their adjustment is critical and they do not operate over a wide frequency range.
Description : The parasitic array can be rotated to receive or transmit in different directions. What is the name given to such an antenna?
Last Answer : Rotary array.
Description : What two main advantages of a parasitic array can be obtained by combining a reflector and a director with the driven element?
Last Answer : Increased gain and directivity.
Description : hat two factors determine the directivity pattern of the parasitic array?
Last Answer : Length of the parasitic element (tuning) and spacing between the parasitic and driven elements.
Description : To maintain the required balance of phase relationships and critical feeding, how must the end-fire array be constructed?
Last Answer : Symmetrically.
Description : What are some disadvantages of the end-fire array?
Last Answer : Extremely low radiation resistance, confined to one frequency, and affected by atmospheric conditions.
Description : How can the frequency range of a collinear array be increased?
Last Answer : By increasing the lengths of the elements of the array.
Description : Ear piercings (cartilage, not lobes) is a meaning attached to the individual locations on the ear?
Last Answer : It’s just decoration. There are a lot of stories about earring meanings, but they don’t hold up. Most of them are schoolyard myths.
Description : I have billions of eyes, yet I live in darkness. I have millions of ears, yet only four lobes. I have no muscle, yet I rule two hemispheres. What am I? -Riddles
Last Answer : The human brain.
Description : Is there any special name for the connective that connects 2 anther lobes in dithecous anther? -Biology
Last Answer : answer:
Description : Which of the following lobes of pituitary atrophies during fetal development and is smaller is adults ?
Last Answer : Which of the following lobes of pituitary atrophies during fetal development and is smaller ... Pars intermedia C. Adenohypophysis D. Neuronhypophysis
Description : Which of the following anatomical considerations is correct: A. optic chiasm lesions characteristically produce a bitemporal hemianopia B. central scotoma occurs early in papilloedema C. in ... hemianopia E. opticokinetic nystagmus is found with bilateral infarction of the parieto-occipital lobes
Last Answer : Ans: A
Description : Width measured in degrees of a major lobes between end of the love at which the relative power is one half (-3dB) its value from the peak of the lobe. A. Bandwidth B. Wavelength C. Radiation D. Beamwidth
Last Answer : D. Beamwidth
Description : Write the names of Cerebral Cortex Lobes?
Last Answer : •Frontal Lobes • Occipital Lobes •Parietal Lobes • Temporal Lobes
Description : A ____ pump consists of a reciprocating or rotating cavity between two lobes or gears and a rotor. a. positive c. negative b. centrifugal d. hand
Last Answer : a. positive
Description : Rabbit liver is made of (a) 4 lobes (b) 6lobes (c) 5 lobes (d) 7 lobes
Last Answer : (c) 5 lobes
Description : What are the modifications of bracts, bracteoles and perianth lobes in a compound spike.
Last Answer : Ans: In compound spike, bracts are modified into sterile Glumes and fertile Lemma, Bracteoles as palea, and perianth lobes as Lodicules.
Description : In which cerebral lobes is the speech center located? Is it the: a) frontal b) parietal c) temporal d) occipital
Last Answer : ANSWER: A -- frontal
Description : If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid (A) Remains unchanged (B) Increases (C) Increases or decreases depending on number of shell passes (D) Decreases
Last Answer : (D) Decreases
Description : The torsion resisting capacity of a given reinforced concrete section. (a) Decreases with decrease in stirrups spacing. (b) Decreases with increase in longitudinal bars. (c) Does not depend upon stirrups and longitudinal steels. (d) Increases with increase in stirrups and longitudinal steels.
Last Answer : (d) Increases with increase in stirrups and longitudinal steels.
Description : As the dissipated power increases, what effect does this have on the resistance of a thermistor?
Last Answer : . It increases.
Description : Python: How to get the indices of several elements in a list or numpy array at once? -Web-Development