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