High impedance electromagnetic surface and method
View Patent ↗A high impedance surface ( 300 ) has a printed circuit board ( 302 ) with a first surface ( 314 ) and a second surface ( 316 ), and a continuous electrically conductive plate ( 319 ) disposed on the second surface ( 316 ) of the printed circuit board ( 302 ). A plurality of electrically conductive plates ( 318 ) is disposed on the first surface ( 314 ) of the printed circuit board ( 302 ), while a plurality of elements are also provided. Each element comprises at least one of (1) at least one multi-layer inductor ( 330, 331 ) electrically coupled between at least two of the electrically conductive plates ( 318 ) and embedded within the printed circuit board ( 302 ), and (2) at least one capacitor ( 320 ) electrically coupled between at least two of the electrically conductive plates ( 318 ). The capacitor ( 320 ) comprises at least one of (a) a dielectric material ( 328 ) disposed between adjacent electrically conductive plates, wherein the dielectric material ( 328 ) has a relative dielectric constant greater than 6, and (b) a mezzanine capacitor embedded within the printed circuit board ( 302 ).
1. A high impedance surface comprising:
at least one printed circuit board;
a plurality of electrically conductive plates disposed on the printed circuit board; and
at least two distinct multi-layer inductors electrically coupled to each other and electrically coupled to at least two of the electrically conductive plates, each inductor comprising at least two coil portions generally and respectively extending at least partially in generally vertically spaced planes;
wherein the spaced planes comprise a first plane generally vertically spaced from a second plane, and wherein each inductor includes first and second separate coil portions in the first plane and a third coil portion in the second plane, and at least two vertical couplers, one coupler electrically coupling the first coil portion to the third coil portion, and another coupler electrically coupling the second coil portion to the third coil portion for forming a continuous inductor coil.
2. A high impedance surface comprising:
at least one printed circuit board;
a plurality of electrically conductive plates disposed on the printed circuit board; and
at least two distinct multi-layer inductors electrically coupled to each other and electrically coupled to at least two of the electrically conductive plates, each inductor comprising at least two coil portions generally and respectively extending at least partially in generally vertically spaced planes;
wherein the spaced planes comprise a first plane generally vertically spaced from a second plane for each inductor, and wherein each inductor includes multiple separate coil portions disposed in the first plane and a single coil portion disposed in the second plane, wherein one of the at least two inductors has the single coil portion above the multiple coil portions while the other inductor of the at least two inductors has the single coil portion below the multiple coil portions.