The original 1965 McGraw-Hill edition is out of print, but are available through several legitimate channels:
The wave progresses along a guiding structure that continuously leaks energy along its length. Examples include slitted waveguides or periodic structures. 2. Why Carlton H. Walter’s Book is the Ultimate Reference
The principles covered in Walter's text have enabled countless modern systems:
Traveling wave antennas are a type of antenna that uses a traveling wave to transmit or receive electromagnetic energy. Unlike standing wave antennas, which use a standing wave to transmit or receive energy, traveling wave antennas use a wave that travels along the length of the antenna. This traveling wave is typically excited by a feedline or a waveguide, and it propagates along the antenna structure, radiating energy into free space. traveling wave antennas walter pdf high quality
Modern flat optics and reconfigurable intelligent surfaces (RIS) utilize modulated surface-wave structures rooted directly in the classic slow-wave equations solved by Walter. 5. Summary of Advantages and Trade-offs Description High Directivity
The operational distinction of a TWA lies in its termination. Unlike a resonant antenna, which is typically open- or short-circuited to force total reflection and create a standing wave, a TWA is deliberately terminated in a matched load. This resistive or absorbing load at the end of the structure absorbs the residual energy, suppressing backward reflection. Consequently, the current and voltage distributions along the antenna approximate a pure traveling wave, characterized by a constant phase progression and an exponentially decaying amplitude due to continuous radiation.
Walter’s text breaks down the design of traveling wave antennas into manageable parameters, primarily focusing on controlling the complex propagation constant ( ) of the wave traveling along the structure: γ=α+jβgamma equals alpha plus j beta The original 1965 McGraw-Hill edition is out of
For engineers, researchers, and students specializing in electromagnetics and antenna design, Carlton H. Walter’s remains a foundational text. Originally published in 1965 and later re-released by Dover Publications, this book provides an exhaustive theoretical and practical analysis of antennas that utilize traveling waves.
While Walter’s text was written in the 1960s, its principles are more relevant than ever.
77 GHz radar systems utilize slotted waveguide or substrate integrated waveguide (SIW) traveling wave structures for compact, high-reliability obstacle detection. Why Carlton H
While Walter’s book is excellent, modern practitioners sometimes complement it with other resources.
If you are looking for a high-quality copy of this 429-page technical guide, you can find it through several reputable providers: Traveling Wave Antennas: Walter, Carlton H - Amazon.com
If you are using Walter's text to design modern RF systems, taking the time to source a crisp, clear, and verified digital copy will save hours of engineering frustration and prevent critical mathematical misinterpretations.