Abstract:
Optimized rectangular wave guide to circular wave guide coupler making it possible to favor, in one version, the circular TE01 mode and in the other version, the circular TE02 mode, wherein a tongue constituted by a sector portion has a constant arc diametrically opposite to the coupling holes and joined by a sector portion opening out progressively from a fine ridge in the absence of the coupling holes. In the TE01 version, the sector having a constant opening has an arc of 60* and in the TE02 version, 90*.
Abstract:
1527691 Waveguide delay equalizer COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT - ALCATEL SA 17 Jan 1977 [3 Feb 1976] 10758/77 Heading H1W A delay equalizer for a circular waveguide, to compensate for the greater velocity of higher frequency wave components, comprises a series connection of identical delay equalizer elements, each consisting of input and output circular waveguides 2, 4 connected at an angle, preferably a right angle, progressive reflectors 6, 8 aligned with the waveguides 2, 4 and connected to their junction, the reflectors tapering from the diameter of the waveguides 2, 4 so that higher frequency components entering therein travel farther before reflection and are delayed more, and a semi-reflecting plate 10 inside the junction and disposed symmetrically to the waveguides 2, 4, the plate reflecting half of the incident energy, and transmitting half with a quarter-wavelength phase shift. Any waves returning along the input 2 are out of phase and cancel, whereas those in the output 4 are in phase. The delay equalizer elements may be connected in a rectangular spiral stack arrangement (see Fig. 2, not shown).
Abstract:
The disclosure describes a delay equalizer for a circular wave guide comprising a circular input wave guide and a circular output wave guide having the same diameter as the input wave guide and being connected to the input wave guide by a common end, the axes of these two wave guides meeting at an angle. The delay equalizer also comprises a first progressive reflector constituted by a circular wave guide whose input diameter is equal to that of the input wave guide and the output wave guide and whose cross-section decreases from its input so that the waves which enter the first progressive reflector will be reflected after having travelled along a path which is longer for increasing frequency, this first progressive reflector being placed in the line of the input wave guide beyond the common end to which it is connected by its input. Also, there is a second progressive reflector identical to the first and placed in the line of the output wave guide beyond the common end to which it is connected by its input. Finally, there is a plane semireflecting plate of the "quarter wave" type occupying the interior cross-section of the wave guides at their common end and being disposed so that the axis of the input wave guide will be symmetrical to the axis of the output wave guide in relation to this plate, the material and the thickness of this plate being chosen so that it will let pass half the energy of the waves which it receives with a phase shift of a quarter of a wavelength and so that it will reflect the other half of this energy.
Abstract:
The digital modulated transmission system transmits by hertzian beam between two stations using the 'route diversity' principle. Two routes assume distinct paths. The two stations each have switching circuits which, as a function of the quality of signals received on the two routes, deliver to the receiver the signals of one or the other of the two routes. Between the two stations there is a series of two bilateral repeaters which frequency transpose the signals they receive. The transposition is such that the signals received by the two stations are all situated in one half of the total frequency band. The signals transmitted by the two stations are all situated in the other half of the frequency band.
Abstract:
Optimized rectangular wave guide to circular wave guide coupler making it possible to favor, in one version, the circular TE01 mode and in the other version, the circular TE02 mode, wherein a tongue constituted by a sector portion has a constant arc diametrically opposite to the coupling holes and joined by a sector portion opening out progressively from a fine ridge in the absence of the coupling holes. In the TE01 version, the sector having a constant opening has an arc of 60 DEG and in the TE02 version, 90 DEG .