The invention relates to mode filters for millimetric waves. The mode filter provided includes a circularly sectioned waveguide divided into a number of equal sectorial channels. Dielectric mode perturbing material is provided in all but one of the channels. This material extends in the direction of the H-field so as not to interfere with a wanted mode of a propagated signal but to perturb the current lines of an unwanted TE.sub.On mode so that an -unwanted TE.sub.On mode in the channel containi...

The invention provides a mode coupler arrangement comprising a main waveguide coupled via arrays of slots to two sets of subsidiary waveguides over a common length. One set of subsidiary waveguides is such as to support one mode of propagation and the other set another mode of propagation. In a preferred embodiment the slots in one set of subsidiary guides are staggered by (1.lambda./4) relative to the slots in the other set of subsidiary guides and the guides of one set are longer than the guid...

A mode scrambler capable of converting the mode distribution of light transmitted through an optical fiber into a stationary mode distribution. The mode scrambler comprises a plurality of cylinders arranged in a predetermined arrangement, and a step index optical fiber of 100 .mu.m or above in core diameter and 0.4 or above in numerical aperture wound around and across the plurality of cylinders. The step index optical fiber is wound at least in one 8-shaped wind at least across the two cylinder...

The present invention pertains to an optical fiber comprising a transparent core having a maximum refractive index n.sub.1 and a radius a surrounded by a layer of transparent cladding material having a refractive index n.sub.0 which is less than n.sub.1. The refractive indices n.sub.1 and n.sub.0, the radius a, and the refractive index profile of the core are designed such that: (a) .DELTA..tau..sub.j, the difference between .vertline.d(Vb)/dV.vertline..sub.j, the normalized delay time of the jt...

Disclosed is a Mode S radar which specifies an aircraft by transmitting interrogations to an aircraft A equipped with a Mode S transponder, and by then receiving and decoding replies corresponding to these interrogations. In the Mode S radar, detection reports on the aircraft A are generated in a manner that: for a Mode A code necessary for generating detection reports, when identicalness between the Mode A codes obtained in a plurality of scans after the initial acquisition of the aircraft A ha...

A page mode/nibble mode dynamic random access memory (DRAM) comprising row and column decoders, the column decoder further comprising a column address buffer and a column address buffer counter. The page mode/nibble mode DRAM also comprises a buffer controller means adapted to receive a write enable signal and to determine whether the DRAM should be placed in a page mode or a nibble mode to facilitate the particular memory access requested by a memory controller. An asserted write enable signal,...

A mode switch is provided that consists of a base, a rotor, a contact spring piece plate and an actuator plate. Movable contacts of contact spring pieces of the contact spring piece plate are relatively and separately mounted over stationary contacts on the base. Actuators of the actuator plate are placed over the contact spring pieces of the contact spring piece plate. The rotor is placed over the actuator plate and is rotatably attached to the base.

A mode scrambler comprises an optical fiber adapter having a diffuser disposed between optical fiber mating ends of the optical fiber adapter. When a single mode optical signal is launched in the mode scrambler, the mode scrambler converts the single mode optical signal to a multimode optical signal that has a substantially even intensity distribution across the modes.

Apparatus for isolating common mode and differential mode radio frequency noise in electronic and digital equipment from each other and quantitatively determining or displaying each for conformity to standard and for correction. The apparatus is likewise capable of determining and displaying the total of the two modes of noise.

A common mode and differential mode inductance assembly including first and second torridial cores wherein first and second windings are wrapped about first and second segments of the first core and the first core forms a first surface and wherein the second core forms a second surface and is positioned adjacent the first core such that the first and second surfaces oppose each other and a gap is formed between the first and second surfaces.