摘要:
A circuit having nearly equally halves inputted electric power in such a way that the difference between the phases of the two outputs is 90 DEG . The outputs are fed to a first exciter which generates a circularly polarized wave. The wave is inputted into a second exciter, and the two outputs of which is combined in a synthesizing circuit. The opened ends of a shield case housing the first exciter and another shield case housing the second exciter are fitted together, and the first and second exciters, together with the cases, can be rotated relatively around the axis of the exciters. The phase difference between the input of the halving circuit and the output of the synthesizing circuit changes with the relative rotational angle between the first and second exciters.
摘要:
An electrically-conductive flexible probe (14) is mounted within a waveguide (12) that receives radio-frequency electromagnetic radiation. A leading portion (16) of the probe (14) has an orientation that is adjustable between two positions that are angularly displaced with respect to each other by 90°. A permanent bar magnet (18) is connected to the leading portion (16) of probe (14), and an electromagnet (20) is mounted adjacent to the bar magnet (18) so as to be capable of being magnetically coupled to the bar magnet (18). The electromagnet (20) is electrically controllable so as to control the magnetic coupling between the bar magnet (18) and the electromagnet (20), move the bar magnet (18) selectively to one of the two angular positions, and thereby correspondingly move the leading portion (16) of the probe (14) and cause the wave guide (12) to transmit radio-frequency electromagnetic radiation having a selected one of two polarizations in planes that are mutually orthogonal with respect to each other and reflect radio frequency electromagnetic radiation having he other polarization.
摘要:
The coaxial-waveguide phase shifter consists of a coaxial waveguide section, comprising an external cylindrical conductor (CE) and an internal cylindrical conductor (CI), both hollow; thereinbetween a certain number of irises (I) parallel to one another is inserted. The irises can be differently shaped and can be fixed to the external or to the internal conductor. By replacing the internal cylindrical conductor with a rectangular conductor, the irises can be unnecessary.
摘要:
The signal polarization rotator utilizes a rotatable signal transition structure having one section (15-1) which acts as a coaxial transmission line center conductor, a section (15-2) suspended over a first ground plane (11-1), a section (15-3) above a second ground plane (11-2), the latter section varying in distance from the ground plane in an exponential, exponential like or linear taper (15-3), and optionally an extended section which in the preferred embodiment is used because of waveguide dimensions and acts as approximately a one quarter wavelenth gap radiator (15-4) and a section (15-5) coupled to the coaxial center conductor and the gap radiator.
摘要:
A system and method for communicating signals through a slip ring. It includes a stator and a rotor configured to rotate relative to the stator about a rotation axis, the rotor having a first wireless module with a first antenna. The stator has a second wireless module with a second antenna. The first and second antennae are arranged along the rotation axis. The first and second antennae are adapted to communicate with each other by at least partially using polarized signals.
摘要:
A rectangular waveguide rotator device for connecting first and second waveguides, the first and second waveguides being arranged at an angle to each other is disclosed. The rotator device comprises: at least one rotator portion, the at least one rotator portion comprising a passage formed by outer walls comprising two longer walls connected by two shorter end walls; the at least one rotator portion comprising a ridge protruding from each of the longer side walls across a width of the longer side walls, the ridge lying between a first and a further section of the rotator portion; the first and further sections of the rotator portion being configured such that they are at an angle with respect to each other, one section being rotated through an angle with respect to the other.
摘要:
In some examples, a device includes a waveguide transition section comprising a first mode suppressor, an attenuation section coupled to the first waveguide transition section via a first adjustable rotation joint, wherein the attenuation section is operable to attenuate the electromagnetic signal, and a first quarter-wave plate section coupled to the attenuation section, wherein the first quarter-wave plate section is operable to introduce a first differential phase shift between a first mode of the electromagnetic signal and a second mode of the electromagnetic signal. The device also includes a second quarter-wave plate section coupled to the first quarter-wave plate section via a second adjustable rotation joint, wherein the second quarter-wave plate section is operable to introduce a second differential phase shift between the second mode of the electromagnetic signal and the first mode of the electromagnetic signal.
摘要:
A polarization converter made of metamaterial, including a base material and a number of artificial microstructures disposed on the base material. The artificial microstructures can influence the electric field vector of plane electromagnetic wave propagating in it. The electric field vector of the electromagnetic wave can be decomposed into two non-zero orthogonal components on one or more planes perpendicular to the incident direction ofthe electromagnetic wave, the orthogonal components can be parallel and perpendicular to the optical axis at the position where the artificial microstructure located. After the electromagnetic wave passing through the polarization converter made of metamaterial, the two orthogonal components have a phase difference –³¸ different from before incidence, thereby achieving mutual conversion between the above electromagnetic wave polarization methods. The polarization converter made of metamaterial of the present invention is simple in structure, and can easily realize polarization conversion of electromagnetic waves.