6 results about "Orthomode transducer" patented technology

A compact feed system (600) is provided which comprises an orthomode transducer or junction (400) and a waveguide H-plane directional coupler (100). The waveguide H-plane directional coupler may comprise two hollow waveguide sections (110, 120) and a coupling section (130) arranged in between the two hollow waveguide sections for coupling a signal from one hollow waveguide section to another hollow waveguide section. In a transverse cross-section of the waveguide H-plane directional coupler, the hollow waveguide sections may be angled towards the coupling section and delimit a recess (20) formed at an inner side of the waveguide H-plane directional coupler. The orthomode transducer or junction (400) may be positioned at least partially in the recess to increase compactness of the feed system.

A dual broad-band orthomode transducer includes a main body and a guiding structure. The main body defines a first waveguide channel for transmitting a low frequency band signal and second waveguide channel for transmitting a high frequency band signal, the top side of the main body is configured with a feed port for receiving an electromagnetic signal. The guiding structure is erected inside the main body and includes a central medium and a sleeve sheathed on the outer periphery of the central medium, the sleeve is connected to the first waveguide channel, and the central medium is connected to the second waveguide channel. The electromagnetic signal belonging to the low frequency band signal is transmitted to the first waveguide channel through the sleeve. The electromagnetic signal belonging to the high frequency band signal is transmitted to the second waveguide channel through the central medium, without requiring additional filters or multiplexers.

An orthomode transducer comprising: a waveguide input; a first branch pair comprising a first waveguide defining a first port and a second waveguide defining a second port, wherein the first branch pair is associated with a first polarization; a second branch pair comprising a third waveguide defining a third port and a fourth waveguide defining a fourth port, wherein the second branch pair is associated with a second polarization; a first magic-tee combiner configured to absorb trapped modes of the first branch pair through a first sum port; and a second magic-tee combiner configured to absorb trapped modes of the second branch pair through a second sum port.

An add-on module enables a SATCOM system to selectively transmit and receive radar signals in addition to SATCOM signals. A circulator has a transmit / receive port and an input port for coupling respectively between a transmit / receive port of the SATCOM orthomode transducer and an output of the SATCOM transmitter amplifier. A low noise radar receiver amplifier has an input port coupled to the output port of the circulator and an output port coupled to the SATCOM receiver. The circulator operates within the frequency range of the SATCOM system and the radar signals, and directs amplified radar and SATCOM transmission signals to the antenna while bypassing the receiver and directs radar signals received from the antenna to the receiver while bypassing the transmitter. The receiver and the transmitter have selectable SATCOM and radar modes configured to transmit and receive at any given time either SATCOM signals or radar signals, respectively.

The present invention relates to a six-port orthomode transducer (1) produced by additive manufacturing, and comprising a dual-polarization input port (10); a dual-polarization output port (11); the input port and the output port defining a main direction (100) corresponding to the direction of propagation of a signal between the input port (10) and the output port (11); a first single-polarization side port (12) extending along a first axis (120) transverse to the main direction (100); a second single-polarization side port (13) facing the first side port (12) and extending along a second axis (130) transverse to the main direction (100); a third single-polarization side port (14) extending along a third axis (140) transverse to the main direction (100); a fourth single-polarization side port (15) facing the third side port (14) and extending along a fourth axis (150) transverse to the main direction (100); said first, second, third and fourth transverse axes each forming an angle with the main direction (100) of between 15° and 75°, the six-port orthomode transducer being characterized by a high-pass filter arranged between the side ports and the output port, said high-pass filter comprising at least two filtering slots (21). The present invention also relates to a transceiver antenna comprising such an orthomode transducer and a plurality of low-pass filters.

Satellite networks play an important role in many applications due to their unique features of global coverage and mobility assistance. Low Earth Orbit (LEO) satellites are currently gaining popularity in wireless communications as they will be heavily used in future wireless communication networks. To enable polarisation diversity, satellite systems commonly use dual-polarized antennas where orthomode transducers (OMTs) are employed in such systems to feed the antennas with the two orthogonal polarizations. An OMT should provide high impedance matching, high isolation levels between ports as well as being lightweight and compact. OMT designs are presented providing a bandwidth ratio of about 55% with good impedance matching and high isolation compatible with LEO satellite feeding structures in terms of thermal, power, and passive intermodulation analysis.