| 1. | For reception, a long Beverage antenna can have significant directivity.
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| 2. | The directivity for various source sizes and shapes is given in.
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| 3. | An antenna's directivity is a component of its efficiency.
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| 4. | These tweeters have different directivity characteristics when compared to standard dome tweeters.
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| 5. | So the directivity of the antenna system resembles a four leaf clover.
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| 6. | There also occur challenges such as directivity in multidimensional case.
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| 7. | It reduces directivity to a degree that offers a reasonably wide sweet spot.
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| 8. | If the beam solid angle is known, then directivity can be calculated as
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| 9. | Thus the directivity of the array indeed is in the direction towards the director.
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| 10. | The ultrasonic devices achieve high directivity by modulating audible sound onto high frequency ultrasound.
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