Patents by Charles M. Knop
A phased-overmoded, tapered waveguide transition has a central section which is tapered linearly ... more A phased-overmoded, tapered waveguide transition has a central section which is tapered linearly in the longitudinal direction and two end sections which are tapered curvilinearly in the longitudinal direction. One of the end sections and at least a portion of the other end section are overmoded and, therefore, give rise to higher order modes of the desired microwave signals propagated there through. The linearly tapered central section shifts the phase of higher order modes generated at one end of the transition so that at least a major portion of such higher order modes is cancelled by higher order modes generated at the other end of the transition.
Papers by Charles M. Knop
IEEE Transactions on Antennas and Propagation, 2000
The design and development of a resonant array of circumferential shunt slots cut into the broad ... more The design and development of a resonant array of circumferential shunt slots cut into the broad wall of a ring waveguide are presented. This antenna, which is recessed into a metal cylinder and dielectric coated, provides nearly omnidirectional coverage. Calculations using an idealized model consisting of a dielectric-coated flush-mounted array on a metal cylinder were performed and used as the primary basis for design. The array recess design was experimentally determined and shown to control the elevation pattern when the recessed array is mounted on a variety of spacecraft shapes. The tolerance problems and the related trapped wave effects encountered in the development of the array are discussed.
IEEE Antennas and Propagation Magazine, 2000
Uploads
Patents by Charles M. Knop
Papers by Charles M. Knop