antennas and feedlines Flashcards

1
Q

horizontallh polarized antenna

A

dipole mounted so the connductor is parallel to the earths surface

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2
Q

direction that radiation is strongest from a half wave dipole antenna in free space

A

beroadside to the antenna

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3
Q

length of a dipole

A

wavelength = 300/frequence 95% of this

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4
Q

how to make an antena resonate on a higher frequency

A

shorten it

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5
Q

approximate length of a 6 meter dipole antenna

A

112 inches

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6
Q

orientation of electric field

A

perpendicular to earth

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7
Q

length of a wuarter wavelength vertical antenna

A

19 inches

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8
Q

loading

A

shortening an antenna, inserting an inductor in he radiating portion of teh antenna to make iit electrically longer

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9
Q

beam antenna

A

antenna that concentrates signals in one direction

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10
Q

rubber duck antenna disadvantage

A

does not transit or receive as effectively as full sized antennas

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11
Q

advantages of a roof mounted antenna

A

procicdes most unifor aradiationn pattern

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12
Q

why use a properly mounted 5/8 wavelength antenna

A

lower angle of radiation and more gain than a 1/4 antenna, improved coverage

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