directivity การใช้

• For reception, a long Beverage antenna can have significant directivity.
• The directivity for various source sizes and shapes is given in.
• An antenna's directivity is a component of its efficiency.
• These tweeters have different directivity characteristics when compared to standard dome tweeters.
• So the directivity of the antenna system resembles a four leaf clover.
• There also occur challenges such as directivity in multidimensional case.
• It reduces directivity to a degree that offers a reasonably wide sweet spot.
• If the beam solid angle is known, then directivity can be calculated as
• Thus the directivity of the array indeed is in the direction towards the director.
• The ultrasonic devices achieve high directivity by modulating audible sound onto high frequency ultrasound.
• Directivity increases with the length of the antenna.
• A Yagi-Uda antenna's maximum directivity is 10.92 dBi.
• The directivity should be as high as possible.
• Waveguide directional couplers will have the best directivity.
• The smaller the driver, the higher the frequency where this narrowing of directivity occurs.
• Electrically small antennas, high directivity and tunable operational frequency are produced with negative magnetic permeability.
• The word " directivity " is also sometimes used as a synonym for directive gain.
• Design criteria are to achieve a substantially flat coupling together with high directivity over the desired band.
• Also, a section about Directivity Control Waveguide was added and it seems it will be deleted.
• This is because the directivity pattern of any wave source is the Fourier Transform of the source function.