摘要:
An (M+1)-for-M redundant switch, where M is an integer greater than 1, is provided. The (M+1)-for-M redundant switch includes a first switch-triad-assembly including a first switching element circulator and two element isolators; a second switch-triad-assembly including a second switching element circulator and two element isolators and; and at least one inverted-switch-triad-assembly including a third switching element circulator and two element isolators. One of the element isolators of the first switch-triad-assembly is arranged to couple power with one of the two element isolators of one of the at least one inverted-switch-triad-assembly. One of the element isolators of the second switch-triad-assembly is arranged to couple power with another one of the two element isolators of one of the at least one inverted-switch-triad-assembly.
摘要:
A waveguide circulator which does not cause an arcing phenomenon and deterioration of microwave characteristic, even when a ferrite member generates heat to raise a temperature thereof. The waveguide circulator is composed of a waveguide formed substantially in Y-shape with rectangular waveguides which are provided so as to position horizontally on a predetermined plane, and further they are extended in different three directions from junction positions of the waveguide wherein two ferrite members are placed in the junction positions thereof so as to oppose to each other on the upper and lower sides in the height direction perpendicular to the predetermined plane wherein an extended section extending in the height direction in the vicinities of the junction positions of the waveguides is formed, and a distance between the ferrite members is expanded to compensate decreased impedance.
摘要:
Switchable circulator comprises a ferrite element (101) with a first segment (102-1) a second segment (102-2) and a third segment (102-3) extending in respective first, second and third directions from a center portion (104) of the ferrite element. Each of the first segment (102-1), the second segment (102-2), and the third segment (102-3) include a first channel (106) located at a first distance (L1) from a center point of the ferrite element and a second channel (108) located at a second distance (L2) from the center point. The first and second distances (L1, L2) define a first and second resonant sections of the ferrite element. Thus, the switchable circulator can be configured to selectively operate in two different frequency bands.
摘要:
Systems and methods for using power dividers for improved ferrite circulator RF power handling are provided. In one embodiment, a method for switching RF power using a high power circulator switch comprises: operating a ferrite circulator switch to direct RF power to either a first output port or a second output port, the ferrite circulator switch comprising at least three ferrite circulators arranged as a triad switch, wherein a first circulator is coupled to the first output port, a second circulator is coupled to the second output port; and using a waveguide power divider coupled between the first circulator and the second circulator, distributing reflected RF power received at the first output port or the second output port between a plurality of waveguide loads.
摘要:
A radar system having a tactical mode and a calibration mode includes a transmitter section (30) for providing high-power amplification of an RF pulsed waveform from an exciter during the tactical mode and the calibration mode. A circulator system (40) has an input port connected to an output of the transmitter section and including first, second and third switchable junctions (C1, C2, C3), and a high-power attenuator (46). The circulator system provides a transmit tactical mode signal path (42) and a transmit calibration mode signal path (44) of virtually identical electrical path lengths for a transmitter output signal, the tactical path passing through the first, second and third junctions in a first direction to an antenna I/O port, the calibration path passing through the first, second and third junctions in a second direction and through the high-power attenuator to an output port. A receiver section (50) is coupled to the output port and includes a receive tactical mode signal path (72) through a low noise amplifier (LNA), mixer, and an intermediate frequency (IF) amplifier to an IF output port for down-converting a radar signal. The receiver section further includes a receive calibration mode signal path (74) through an attentuator which bypasses the LNA and passes through the mixer and IF amplifier to the IF output port.
摘要:
A system and method for improving quality of video communication (Fig. 1) includes a packets generator logical unit (PGU) (110) coupled to a video source for receiving a compressed video stream and generating primary (PDC) and secondary data (SDC) chunks for transmittal to one or more destination nodes via a network. Each primary data chunk is associated with a secondary data chunk, and each secondary data chunk includes video data that covers a same portion of a video frame as video data included in each associated primary data chunk. The PGU (110) encapsulates the primary and secondary data chunks in associated primary-secondary packet pairs composed of MB data fields, picture header fields, GOB and slice start header fields, and MB header fields, among others. The destination nodes process the secondary packets received via the network if the primary packets are damaged or lost in transmission.
摘要:
A hollow metal component for use in a waveguide system includes pre-assembled electromagnetic control devices (14, 15) (circulators or isolators) which are mounted in apertures in the component. The control devices include a plate (20) having an external magnetic element (24) coupled to ferrite core (29) mounted in the waveguide cavity. The core is carried on a multi-faceted metal matching element (28) with dielectric tuning elements (30). A plurality of mutually spaced adjusters (33) are also inserted through the plate for fine tuning in-situ.