1
Saad S Saad, Charles M Knop: Overmoded tapered waveguide transition having phase shifted higher order mode cancellation. Andrew Corporation, Leydig Voit & Mayer, November 12, 1985: US04553112 (123 worldwide citation)

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 ...


2
Kirk S Giboney: Gap-mode waveguide. February 10, 2015: US08952678 (122 worldwide citation)

In a gap-mode waveguide embodiment, an interior gap in a tubular waveguide principally condenses a dominant gap mode near the interior gap, and an absorber dissipates electromagnetic energy away from the gap mode. In this manner, the gap mode may dissipate relatively little power in the absorber com ...


3
Frank R Williams, Thomas G Ruttan: Coplanar transmission structure having spurious mode suppression. Tektronix, William K Bucher, July 6, 1993: US05225796 (60 worldwide citation)

An improved coplanar transmission structure has a coplanar transmission line formed on one surface of a substrate and a lossy resistive material formed on the opposite surface of the substrate for suppressing spurious electromagnetic modes propagating through the substrate. The lossy resistive mater ...


4
Jeffrey A Walter, Kailash C Garg, Joseph C Rowan: Dielectric waveguide having higher order mode suppression. W L Gore & Associates, Mortenson & Uebler, October 17, 1989: US04875026 (56 worldwide citation)

A dielectric waveguide for the transmission of electromagnetic waves is provided comprising a core of polytetrafluoroethylene (PTFE), one or more layers of PTFE cladding overwrapped around the core, a mode suppression layer of an electromagnetically lossy material covering the cladding and an electr ...


5
Chern I Huang, Mark Calcatera: DC biasing and AC loading of high gain frequency transistors. The United States of America represented by the Secretary of the Air Force, Gerald B Hollins, Thomas L Kundert, February 27, 1996: US05495180 (52 worldwide citation)

A small sized energy conveying and signal dissipating loading apparatus for use in the testing of a transistor of the high gain high frequency type is disclosed. The energy conveying and loading device of the invention employs a transmission line-like network of distributed components in order to ro ...


6
John P Quine: Planar microwave integrated circuit power combiner. General Electric Company, Donald R Campbell, James C Davis, Marvin Snyder, September 22, 1981: US04291278 (46 worldwide citation)

A broadband, low loss, microwave integrated circuit power combiner for field effect transistors and other solid state amplifiers has a single metallized MIC substrate contained within a waveguide structure. An array of fin-line transitions from plural microstrip lines to a standard output waveguide ...


7
Douglas Heckaman, Ronald Vought, Edward Caraway: Waffle wall-configured conducting structure for chip isolation in millimeter wave monolithic subsystem assemblies. Harris Corporation, Evenson Wands Edwards Lenahan & McKeown, November 12, 1991: US05065123 (19 worldwide citation)

A two-dimensional periodic conductive post array structure is used to suppress higher order wave propagation within a large microstrip housing assembly without attentuating the desired TEM mode of propagation. Substantially vertical conductive posts are spaced at appropriate wavelength periods in th ...


8
Robert S Harp, Kenneth J Russell: Mode filter apparatus. The United States of America represented by the Secretary of the Air Force, Joseph E Rusz, William Stepanishen, December 9, 1980: US04238747 (18 worldwide citation)

A mode filter apparatus for preventing unwanted modes in a multi-moded structure utilizing a radial plurality of resonant slots on the bottom of the filter cavity. The top of the filter cavity includes a variable height center section to provide mode selectivity in cooperation with the resonant slot ...


9
David L Saul: Printed circuit waveguide to microstrip transition. The United States of America represented by the Secretary of the Navy, April 7, 1981: US04260964 (16 worldwide citation)

A waveguide to microstrip transition for transferring guided electromagne signals from dominant mode rectangular waveguide to microstrip line and vice versa. A microstrip printed circuit card is disposed in parallel to the narrow walls of a waveguide. The printed circuit card includes a microstrip s ...


10
Tore N Anderson: Mode suppressor for circular waveguides utilizing a plurality of resistance cards. Litton Systems, Michael H Wallach, Robert F Rotella, August 10, 1982: US04344053 (12 worldwide citation)

A mode suppressor for use with circular waveguides which are over-sized to provide a low-loss transmission path for signals in the TE.sub.11 mode and which carry an electric field which is perpendicular to the longitudinal axis of the waveguide. The mode suppressor includes resistance cards located ...