I know how hard it is to find decent digital copies of older engineering textbooks. I recently needed to reference K. Walter's work on Traveling Wave Antennas, and most copies online were practically unreadable.
Methods of feeding these antennas to optimize performance.
: Structures where the phase velocity is less than the speed of light; radiation occurs primarily at discontinuities like the feed or termination. Fast-Wave (Leaky-Wave) Antennas traveling wave antennas walter pdf high quality
Simple wire configurations where the length is several wavelengths long, terminated with a resistor to suppress the backward wave.
The primary, free, and legal source for a high-quality scan of this classic Dover book. I know how hard it is to find
sin(θm)≈βk0sine open paren theta sub m close paren is approximately equal to the fraction with numerator beta and denominator k sub 0 end-fraction
Aircraft radar altimeters use traveling wave antennas for wideband operation (4.2 to 4.4 GHz). The constant phase slope ensures altitude accuracy within a few feet. Methods of feeding these antennas to optimize performance
: Offers a free borrowable digital version of the 1970 Dover edition.