Electromagnetic Waves and Antennas combined - Chapter 8 pdf

... Figures 8. 7.1 8. 7.3. 8. 7 Computer Experiment—Omnidirectional Dielectric Mirrors. Reproduce the results and graphs of Figures 8. 8.2 8. 8.10. 8. 8 Derive the generalized Snel’s laws given in Eq. (8. 10.10). ... (degrees) F 1 , F 2 TE and TM bandwidths TM band TE band 0 10 20 30 40 50 60 70 80 90 0 0.5 1 1.5 2 θ a (degrees) F 1 , F 2 TE and TM bandwidths TM band TE band Fig....

Ngày tải lên: 13/08/2014, 02:20

... discuss TE and TM waves propagating in oblique directions in linearly birefrin- gent media. We will use these results in Chap. 8 to discuss reflection and refraction in such media, and to characterize ... appropriate linear combinations. For example, we define the right-polarized (forward-moving) and left-polarized (backward- moving) waves for the {E + ,H + } case: E R+ = 1 2  E...

Ngày tải lên: 13/08/2014, 02:20

... the RG- 58/ U. Home cable-TV uses 7 5- cables, such as the RG-59/U or RG-6/U. The thin ethernet computer network, known as 10base-2, uses RG- 58/ U or RG-58A/U, which is similar to the RG- 58/ U but ... AWG a Z RG-6/U 18 0.512 75 RG -8 / U 11 1.150 50 RG-11/U 14 0 .81 5 75 RG- 58/ U 20 0 .406 50 RG-59/U 22 0.322 75 RG-174/U 26 0.203 50 RG-213/U 13 0 .915 50 The most commonly used cables ar...

Ngày tải lên: 13/08/2014, 02:20

... plane waves propagating in dielectrics, conductors, and birefringent me- dia, (b) guided waves propagating in hollow waveguides, transmission lines, and optical fibers, and (c) propagating waves ... fabricated [ 381 ]. Negative-index media, also known as left-handed media, have , μ that are simulta- neously negative, <0 and μ<0. Veselago [376] was the first to study their...

Ngày tải lên: 13/08/2014, 02:20

... attenuations at 1 cm will be in dB and in absolute units: A = 8. 686 z/δ = 1.1dB, 10 −A/20 = 0 .88 A = 8. 686 z/δ = 4.9dB, 10 −A/20 = 0.57 Thus, the fields at a depth of 1 cm are 88 % and 57% of their values ... log 10  P(z) P(0)  = 20 log 10 (e)αz = 8. 686 αz (2.6. 18) where we used the numerical value 20 log 10 e = 8. 686 . Thus, the quantity α dB = 8. 686 α is the attenuation...

Ngày tải lên: 13/08/2014, 02:20

... m/s ( 180 km/hr) veloc- ity resolution at a 3-GHz carrier frequency, would require B = 5 MHz and T = 1 msec, resulting in the large time-bandwidth product of BT = 5000. Such large time-bandwidth ... (3.10.2) that the 3-dB width of the spectrum is Δω = 0 .88 6(2π)/T, or in Hz, Δf = 0 .88 6/T, and similarly, the quantity Δf = 1/T represents the 4-dB width. Thus, the effective bandwidth of t...

Ngày tải lên: 13/08/2014, 02:20

... half-wave, (c) layer-1 is quarter- and layer-2 half-wave, and (d) layer-1 is half- and layer-2 quarter-wave. Show that the reflection coefficient at interface-1 is given by the following expressions ... of ρ 1 , the half- and quarter- wavelength cases have the same notch widths. A standard measure for the width is the 3-dB width, which for the half-wavelength case is twice the 3-dB freq...

Ngày tải lên: 13/08/2014, 02:20

... Structures r= -0 .1000 -0 .2000 -0 .4000 0.5000 A= 1.0000 1.0000 1.0000 1.0000 -0 .1000 -0 .1200 -0 .2000 0 -0 .0640 -0 .1000 0 0 -0 .0500000 B= -0 .1000 -0 .2000 -0 .4000 0.5000 -0 . 188 0 -0 .3600 0.5000 0 -0 .3500 0.5000 ... [1, -0 .1, -0 .064, -0 .05]; b = [-0 .1, -0 . 188 , -0 .35, 0.5]; [r,A,B] = bkwrec(a,b); n = r2n(r); r =...

Ngày tải lên: 13/08/2014, 02:20

... as p-polarization, π-polarization, or TM po- larization, the electric fields lie on the plane of incidence and the magnetic fields are Fig. 7.1.1 Oblique incidence for TM- and TE-polarized waves. 7.1. ... refractive index is n water = 9 and we find θ B = 83 .7 o and θ  B = 6.3 o . We also find ρ TE (θ B )=−0.27 98 and |ρ TE (θ B )| 2 = 0.0 783 / Thus, for TE waves, only 7 .83 % of...

Ngày tải lên: 13/08/2014, 02:20

... 1.12/4 = 0. 28 MW = 280 kW. The results of these two cases are consistent with the values quoted in Table 9.6.1 for the C-band and X-band waveguides, WR-159 and WR-90.  Example 9 .8. 2: WR-159 Waveguide. ... 6.56 8. 20 12.50 X 250 kW 0.110 WR-62 0.622 0.311 9.49 11.90 18. 00 Ku 140 kW 0.176 WR-42 0.42 0.17 14.05 17.60 26.70 K 50 kW 0.370 WR- 28 0. 28 0.14 21 . 08 26.40 40.00 Ka 27...

Ngày tải lên: 13/08/2014, 02:20