Patent ID: 7525499
Filing Date: 2009-04-28
Classification: H01Q

Abstract:
1. A differentially-fed variable directivity slot antenna comprising: a dielectric substrate ( a ground conductor ( a differential feed line ( at least one slot structure ( the at least one slot structure ( the at least one slot structure ( the first selective radiation portion group includes at least one first selective radiation portion ( the second selective radiation portion group includes at least one second selective radiation portion ( the feeding portion ( the at least one first selective radiation portion ( the at least one second selective radiation portion ( the feeding portion ( the at least one first selective radiation portion ( a leading end of each of the at least one first selective radiation portion ( the at least one second selective radiation portion ( a leading end of each of the at least one second selective radiation portion ( the at least one slot structure ( in between places where the feeding portion intersects the signal conductors ( between the one end of the feeding portion ( between the other end of the feeding portion ( each high-frequency switch ( the RF structure reconfigurability function is realized when a slot resonator with open both ends is formed by the first selective radiation portion ( the slot resonator with open both ends having a slot length corresponding to a ½ effective wavelength at the operating frequency fo; and the operation status switching function is realized by the high-frequency switches short-circuiting the slot structure.