means impedance divided by the characteristic impedance of the air, [z.sub.0] = [rho][c.sub.0].
The resultant matrix is the normalized impedance
matrix [[??]], as shown in
2(c) presents the normalized impedance
of the material, the real value of which is near unity within the non-resonant region, ensuring a good match between the antenna and air.
2(a) represents the relation between normalized impedance
ratio ([Z.sub.a]/[Z.sub.0]) and ([Z.sub.S1]/[Z.sub.0]) plotted against electrical lengths [[theta].sub.a] or [[theta].sub.S1] and likewise Fig.
The magnitude and phase of the normalized impedance
for a vent length of 1.0 m (39.4 in.) is compared in Figure 8.
To scale the impedance of the model from the normalized impedance
, i.e., [g.sub.0], to [Z.sub.o], all the J-inverters have to be divided by [Z.sub.o] as given in (2).
So, there is a nonlinear transformation between normalized impedance
z=r+jx and transition parameters [[phi].sub.r], [[phi].sub.x], [[theta].sub.r] and [[theta].sub.x].
* E-mail: email@example.com Table 1: Variation of Normalized Impedance
Relative to Tube Radius for Constant Value of Stenosis Height.
The normalized impedance
[Z.sub.norm] (t) is defined by Eq.
Figure 2 shows the normalized impedance
results when the width [W.sub.rf] is varied from 8 to 16 mm and all the other parameters are fixed: [R.sub.cs] = 26 mm, [L.sub.rf] = 16 mm, [G.sub.sf] = 10 mm and [W.sub.f] = 1.94 mm.
Based on the Bloch-Floquet theorem, the propagation constant and the normalized impedance
of the CRLH TL unit cell can be expressed as 
Assuming that the available impedance values are in the range of 10 [OMEGA] < [Z.sub.i] < 150 [OMEGA], the normalized impedance
values have the range of 0.2 < [z.sub.i] < 3.