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GENERAL TRANSMISSION THEORY
in ATTENUATION AND STABILITY OF WAVES
6 other sections not shown
air-filled amplitude aperture approximately attenuation constant attenuation region axis Barrow beam angle Bessel functions boundary conditions cavity cavity resonator characteristic impedance circular guide circular tube circular wave guide coaxial line conducting conductor conical horn critical frequency critical wavelength cross-section curved curvilinear coordinates cylinder defined deformed derived determined diffraction dimensions dipole direction of propagation E0 wave electric and magnetic electric field electric force electric vector electromagnetic elementary waves elliptic energy expression field components flare angle gives group velocity H waves H10 wave hence hollow horizontal icoe infinite number integral Jn(kp length longitudinal-section wave magnetic field Mathieu functions Maxwell's equations modes normal oscillation parallel phase constant phase velocity polars propagation constant radius ratio rectangular guide rectangular wave guide sectoral horn shown in Figure shunt slot solution spherical standing wave surface theory transmission line transverse wave equation wave impedance wave types zero