Description : What three factors determine the type, size, and shape of an antenna?
Last Answer : Frequency of operation of the transmitter, amount of power to be radiated, and general direction of the receiving set.
Description : What composite field (composed of E and H fields) is found stored in the antenna?
Last Answer : Induction field.
Description : Which two composite fields (composed of E and H fields) are associated with every antenna?
Last Answer : Induction field and radiation field.
Description : If a transmitting antenna is placed close to the ground, how should the antenna be polarized to give the greatest signal strength?
Last Answer : Vertically polarized.
Description : The power gain of an antenna is directly related to what other antenna property?
Last Answer : Directivity.
Description : What radar component permits the use of a single antenna for both transmitting and receiving?
Last Answer : Duplexer.
Description : What is the result of an impedance mismatch between a receiver or transmitter and its transmission line or antenna?
Last Answer : High vswr, which equates to poor reception or a loss of power output.
Description : All the power sent down a transmission line from a transmitter can be transferred to an antenna under what optimum conditions?
Last Answer : When the characteristic impedance of the transmission line and the load impedance are equal.
Description : What type of transmission line is often used to connect a television set to its antenna?
Last Answer : Twin lead.
Description : What term is used for the end of the transmission line that is connected to an antenna?
Last Answer : Output end, receiving end, load end and sink.
Description : What connecting link is used to transfer energy from a radio transmitter to its antenna located on
Last Answer : Transmission line.
Description : What determines the beam elevation angle of an antenna that is electronically scanned in elevation?
Last Answer : Frequency or phase of radiated energy.
Description : What type of antenna has all elements connected to the same energy source?
Last Answer : Driven Array.
Description : What is a set of antenna elements called?
Last Answer : Antenna Array.
Description : A horizontally truncated paraboloid antenna is used for what purpose?
Last Answer : Determine elevation.
Description : What characteristic allows the same antenna to both transmit and receive?
Last Answer : Reciprocity.
Description : What is the term that is used to describe narrowness in the radiated beam of an antenna?
Last Answer : Antenna directivity.
Description : What type of antenna radiates in and receives energy from all directions at once?
Last Answer : Omnidirectional.
Description : What term is used to express the efficiency of an antenna?
Last Answer : Power gain or power ratio
Description : What precautions must be taken when sweeping a transmitting antenna?
Last Answer : You must ensure that power induced from any adjacent transmitting antennas does not damage your test equipment.
Description : What is the purpose of an antenna coupler
Last Answer : It matches the impedance of an antenna to that of a transmission line at any desired frequency.
Description : What is the function of an antenna patch panel?
Last Answer : To connect an antenna/transmission line to a receiver/transmitter.
Description : What is the radiation pattern of a quarter-wave antenna?
Last Answer : A circular radiation pattern in the horizontal plane, or same as a half wave.
Description : What is the simplest method of feeding power to the half wave antenna?
Last Answer : To connect one end through a capacitor to the final output stage of the transmitter.
Description : In which plane will the half-wave antenna be operating if it is mounted horizontally?
Last Answer : Vertical plane.
Description : . If a basic half-wave antenna is mounted vertically, what type of radiation pattern will be produced?
Last Answer : Nondirectional.
Description : The Yagi antenna is an example of what type of array?
Last Answer : Multielement parasitic array.
Description : What is the primary reason for the development of the turnstile antenna?
Last Answer : For omnidirectional vhf communications.
Description : What is the main disadvantage of the rhombic antenna?
Last Answer : It requires a large antenna site.
Description : What is the polarity of the currents that feed the V antenna?
Last Answer : Opposite.
Description : What is another name for the Beverage antenna?
Last Answer : Wave antenna.
Description : To radiate power efficiently, a long-wire antenna must have what minimum overall length?
Last Answer : One-half wavelength.
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 is the purpose of antenna stubs?
Last Answer : To produce desired phase relationship between connected elements.
Description : What is the radiation resistance of a half-wave antenna in free space?
Last Answer : 73 ohms.
Description : What type of polarization should be used if an antenna is mounted on a moving vehicle at frequencies below 50 megahertz?
Last Answer : Vertical polarization.
Description : The various properties of a transmitting antenna can apply equally to the same antenna when it is used as a receiving antenna. What term is used for this property?
Last Answer : Reciprocity of antennas.
Description : What is the term used to identify the points of minimum current and minimum voltage on an antenna?
Last Answer : Current and voltage nodes.
Description : What is the term used to identify the points of high current and high voltage on an antenna?
Last Answer : Current and voltage loops.
Description : What type of amplifier would be used to amplify the signal from a radio antenna?
Last Answer : An rf voltage amplifier.
Description : When speaking of antennas. ______ is a section which would be a complete antenna by itself. A. image B. top loading C. bay D. quarterwave
Last Answer : C. bay
Description : What are the three main parts of CRT?
Last Answer : a. Electron gun. b. Deflection system
Description : What are the three parts of a fiber optic transmitter?
Last Answer : Interface circuit, source drive circuit, and an optical source.
Description : Hard disk drive transports contain the electromechanical parts that perform what three functions?
Last Answer : a. Rotates the hard disk platters. b. Writes data to and reads data from the disk platters
Description : List the three parts of an optical fiber.
Last Answer : Core, cladding, and coating or buffer.
Description : What is the purpose of each of the three parts of a cell?
Last Answer : The electrodes are the current conductors of the cell. The electrolyte is the solution that acts upon the electrodes. The container holds the electrolyte and provides a means of mounting the electrodes.
Description : What are the three parts of a cell?
Last Answer : The electrodes, the electrolyte, and the container
Description : List the three parts of a fiber optic data link
Last Answer : Transmitter, optical fiber, and receiver.
Description : What radar subsystem supplies timing signals to coordinate the operation of the complete system?
Last Answer : Synchronizer.
Description : Which of the following parts of the radio receiver represent the component that extracts the desire RF signal from the electromagnetic wave? A. AF amplifier B. Antenna C. Detector D. Crystal
Last Answer : B. Antenna