Tachypnea - Distinction from other breathing terms. 1  Different sources produce different classifications for breathing terms. 2  Some describe tachypnea as any rapid breathing. Hyperventilation is then described as increased ventilation of the alveoli (which can occur through increased rate or depth of breathing, or both) where there is a smaller rise in metabolic carbon dioxide relative to this increase in ventilation.
However, guidance is also possible, e.g., by the use of reflections, e.g. at metallic interfaces. Some waveguides also involve plasmonic effects at metals. Figure 1: Two different kinds of waveguides. Planar waveguides guide light only in the vertical direction, whereas channel waveguides guide in two dimensions.
How to build your own WaveGuide Antenna (Cantenna) for 802.11b/g WiFi Wireless Networking and other 2.4GHz Applications. Building a WaveGuide Antenna, also known as a Cantenna, is a fun and rewarding exercise for those interested in getting more range out of their stock 802.11b/g wireless networking equipment. The concept is fairly simple - a standard radiating antenna transmits and receives RF energy in all directions.