Electromagnetic Waves and Antennas combined - Chapter 7 potx

... 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. ... typical ray between two antennas at height h and distance d is shown in Fig. 7. 15 .7. Fig. 7. 15 .7 Rays in standard atmosphere over a flat Earth. Assuming an upward launch an...

Ngày tải lên: 13/08/2014, 02:20

... still a right-handed vector system, but {E 0 , H 0 , k} will be a left-handed system. This is the reason why Veselago [ 376 ] named such media left-handed media. † In a lossy negative-index medium, ... 9, and c d = c 0 /n d = 0.33 ×10 8 m/sec and η d = η 0 /n d = 377 /9 = 41.89 Ω. The attenuation coefficient (2 .7. 2) will be: α = 1 2 η d σ = 1 2 41 .89 ×4 = 83 .78 nepers/m ⇒ α dB = 8.686...

Ngày tải lên: 13/08/2014, 02:20

... reflection- less notches and are used in the design of thin-film antireflection coatings, dielectric mirrors, and optical interference filters [615– 677 ,73 7 77 0], and in the design of broad- band terminations ... 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...

Ngày tải lên: 13/08/2014, 02:20

... modes and corresponding E-field patterns. m u v β k c α c f m 0 1.3248 5. 277 7 12.2838 2.64 97 10.5553 0.0000 1 2.6359 4 .76 03 11.4 071 5. 271 8 9.52 07 8.6603 2 3.9105 3 .78 37 9.8359 7. 8210 7. 5 675 17. 3205 3 ... 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 kW 0.583 WR-15...

Ngày tải lên: 13/08/2014, 02:20

... 0.5384 ∠−162. 67 o ,r 1 = 0.4 373 [c2,r2] = sgcirc(S,’a’,14); % c 2 = 0.62 27 −162. 67 o ,r 2 = 0.3422 [c3,r3] = sgcirc(S,’a’,15); % c 3 = 0 .71 11∠−162. 67 o ,r 3 = 0.23 37 [cG,rG] = sgcirc(S,’s’); % c G = 1. 574 8∠−162. 67 o ,r G = ... 28.48 17 Ω,u= 2.5832, eff = 7. 2325,λ= 5. 578 cm,λ/4 = 1.394 cm Z 2 = 11.0232 Ω,u= 8.9424, eff = 8.2 974 ,λ= 5.2 07 cm,λ/8 = 0.651 cm Z 1 = 118 .7...

Ngày tải lên: 13/08/2014, 02:20

... length dualband - two-section dual-band Chebyshev impedance transformer dualbw - two-section dual-band transformer bandwidths stub1 - single-stub matching stub2 - double-stub matching stub3 - triple-stub ... integrals C2(x) and S2(x) hband - horn antenna 3-dB width heff - aperture efficiency of horn antenna hgain - horn antenna H-plane and E-plane gains hop...

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 ... [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 unusual el...

Ngày tải lên: 13/08/2014, 02:20

... (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 products ... quadrature weights and points h = - wp^2 * tf * J1over(wp*sqrt(x.^2 - tf^2)) .* exp(j*w0*(t(i)-x)); Ez(i) = exp(j*w0*(t(i)-tf)) + w’*h; % exact output Es(i) = exp(j*w0*t(i)-j*k0*tf...

Ngày tải lên: 13/08/2014, 02:20

... of Problem 4.14 lead to the so-called Appleton-Hartree equations for describing plasma waves in a magnetic field [72 0 72 4]. 4.15 A uniform plane wave, E e −j k·r and He −j k·r , is propagating ... 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 + −jηH +  E...

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 ... (5.2.3) and (5.2.4). 5.3. Reflected and Transmitted Power 159 5.3 Reflected and Transmitted Power For waves propagating in the z-direction, the time-averaged Poynting vector has only...

Ngày tải lên: 13/08/2014, 02:20