| 摘要 |
<p>A waveguide switch operable at microwave frequencies is formed of two waveguides (38, 40) of rectangular cross section with a longer wall and a shorter wall, the two waveguides sharing a common shorter wall (50). Two coupling windows (52, 54) are disposed within the common wall for coupling electromagnetic energy between the two waveguides, each coupling window introducing a 90o phase shift. Each window couples one-half the power of an electromagnetic wave from a first of the guides to a second of the guides. The common wall is parallel to the electric field of the coupled wave, with each wave being a TE wave. A 90o phase shift is introduced by each coupling with the result that utilization of both windows produces a summation of the two waves in the second of the waveguides and a cancellation of the two waves in the first of the waveguides. Gates (60, 62) are employed for selectively closing off either one or both of the windows to retain all of the power in the first waveguide, or to close off only one of the waveguides for an equal distribution of the power in both waveguides.</p> |
