Electromagnetic Waves and Antennas combined - Chapter 23 potx

... 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

... other. Examples of such waves are the evanescent waves in total internal reflection, various guided-wave problems, such as surface waves, leaky waves, and traveling-wave antennas. The most famous ... forward-moving) E (z)= A( ˆ x +j ˆ y)e −jkz (left-polarized, forward-moving) E (z)= A( ˆ x −j ˆ y )e jkz (left-polarized, backward-moving) E (z)= A( ˆ x +j ˆ y )e jkz (right-polarized, b...

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... 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 .1880 -0 .3600 0.5000 0 -0 .3500 0.5000 ... as bandstop or bandpass filters. Quarter-wave phase-shifted fiber Bragg gratings act as narrow-band transmission filters and...

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... 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. ... k 2 0 (n 2 −n 2 sin 2 θ) is negative and k  z becomes pure imaginary. In this case, the real-parts in the right-hand side of Eq. (7.16.8) are zero, showing that |ρ TE |=|ρ TM |=1 an...

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... 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. Consider the C-band WR-159 air-filled waveguide whose characteristics ... in the case of uniform plane waves propagat- ing in the z-direction, that is, they are perpendicular to each other, their cross-product points in the z-direction, and they satisfy: H T = 1...

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... ratios P in /P avG and P L /P avN measure the mismatching between the generator and the two-port and between the load and the two-port. Using the de - nitions for the power gains, we obtain the input and output ... low-earth-orbit and multipoint microwave distribution systems, and other low-noise applications. At 2 GHz, its S-parameters and noise-figure data are as follows,...

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... 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 ... jωD is the total current in the right-hand side of Amp ` ere’s law and accounts for both conducting and dielectric losses. The time-averaged version of Poynt- ing’s theorem is discu...

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... (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...

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... 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 L+ = 1 2  E + +jηH +   E + = ... wavenumber k + and backward with k − , and the reverse is true of the E − (z) component. The forward-moving component of E + and the backward-moving component...

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... 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