Two dimensional single layer metal structure 米丽 a ! - ●
Two dimensional single layer metal structure
EBG structures can be used... As high impedance surface (restrain surface waves) As antenna's reflector (artificial magnetic materials) As antenna's slipcover (enhance gain,reduce RCS) Antenna array (restrain mutual couple) As TEM wave guide(magnetic wall) As resonator (High Q) As filter and phase shifter ●
As high impedance surface (restrain surface waves) As antenna’s reflector (artificial magnetic materials) As antenna’s slipcover (enhance gain, reduce RCS) Antenna array (restrain mutual couple) As TEM wave guide (magnetic wall) As resonator (High Q) As filter and phase shifter … EBG structures can be used…
Surface Wave X eax X>0 TM wave 81 Z 2 erx X<0 E1 =(2+212)ejwt-jkz-0x E12=E2: E2=(E2a+2E2z)ejwt-jkz+r 6E1x=82E2x ● ● ●
x x z z E E E E 1 1 2 2 1 2 TM wave Surface Wave
k= 81e2 ⊙ V 1+82 c E w = V 1+8c 0 61=1,62=e 0= -1w Ve1+82 - -62 W 81+e2c ● ●
1 2 1
A).Dielectric Surface If s>0,then a and y are imaginary Simply plane wave propagate through the dielectric interface If &<-1,or s is imaginary,the a and y are positive The wave is bound to the surface x e-ax X>0 81 Z 2 erx X<0
If 0, then and are imaginary A). Dielectric Surface Simply plane wave propagate through the dielectric interface If -1,or is imaginary, the and are positive The wave is bound to the surface x z X<0 X>0