8 results about "Waveguide aperture" patented technology

The present disclosure relates to an antenna layer (1) having a rear face (2) and a front face (3) and a method for producing an antenna layer (1). The antenna layer (1) comprises at least two waveguide channels (4) extending at the rear face (2), each comprising at least one waveguide hole (5) arranged at the front face (3) for transmitting and / or receiving signals. The waveguide channels (4) each comprise at least one radiation opening (6) which is arranged in the antenna layer (1) and which is interconnected to the waveguide aperture (5) by at least one radiation channel (7). A parting line (8) is arranged in the at least one radiation channel (7) between the rear face (2) and the front face (3), which parting line (8) is spaced apart from the at least one radiation opening (6) towards the at least one waveguide hole (5) by a distance (D) and preferably extends circumferentially within the at least one radiation channel (7). The present disclosure also relates to an antenna assembly (17) comprising the antenna layer (1) and an antenna arrangement (23) comprising the antenna assembly (17).

An antenna device for automotive radar applications includes a printed circuit board having a front face and a back face and an electronic component which is interconnected to the printed circuit board and an antenna layer having a front face and a back face, which back face is interconnected to the front face of the printed circuit board. At least one waveguide aperture is interconnected to the front face of the antenna layer and is communicatively connected to the electronic component by at least one waveguide channel, wherein the at least one waveguide channel comprises a conductive surface for guiding an electromagnetic field between the electronic component and is formed by a recess arranged between the back face of the antenna layer and the front face of the printed circuit board.

The present disclosure relates to a waveguide transition arrangement (300, 700) for coupling a signal between a transmission line (120, 320) and a waveguide aperture (112, 312, 712) The transition arrangement (300) comprises - an electrically conductive backshort (319, 719), - a first layer structure (103, 703) comprising a first dielectric carrier material (104) and a first metallization layer (105), and - a second layer structure (106, 306, 706) comprising a second dielectric carrier material (107, 307), a second metallization layer (108, 308), a trench (109, 309, 709) provided with electrically conductive trench walls (110, 111; 318), and a waveguide aperture (112, 312, 712) that is connected to the trench (109, 309, 709), comprises electrically conductive inner waveguide walls (321), and defines a waveguide that has a signal propagation extension (E) into the second layer structure (106, 306, 706). The first metallization layer (105) comprises a probe (116, 116A), a first signal conductor (113, 133A), and a pair of beamlead conductors (114A, 114B) on each side of the first signal conductor (113, 113A) and an end of the first signal conductor (113, 133A) is connected to the probe (116, 116A). The second metallization layer (108, 308) comprises trench side conductors (115A, 115B; 315A, 315B) on opposite sides along the trench (109, 309, 709), and an aperture conductor (117, 317) that partially circumvents the waveguide aperture (112, 312, 712). The beamlead conductors (114A, 114B) are connected to the respective trench side conductors (115A, 115B; 315A, 315B) such that the first signal conductor (113, 113A) runs along to the trench (109, 309, 709), and the probe (116, 116A) can couple the signal between the transmission line and a waveguide.

An antenna device (1) including a printed circuit board (2) and a thereon arranged electronic component (3). The antenna device (1) includes at least two individual antenna elements (12) which are interconnected to the electronic component (3) configured to transmit and receive a signal. The antenna elements (12) each include at least one waveguide channel (9) interconnecting in the antenna assembly (6). A first waveguide aperture (10) is arranged at a back face (16) of the antenna assembly (6). The first waveguide aperture (10) is interconnected to the electronic component (3) and configured to transmit and / or receive a signal. A second waveguide aperture (11) is arranged at a front face (17) of the waveguide assembly (6) and is also configured to transmit and / or receive a signal.

This invention discloses a planar transmission line to rectangular waveguide conversion structure, comprising a multi-layer ground plane, a planar transmission line, a matching unit, and a rectangular waveguide. The multi-layer ground plane has standard waveguide aperture regions formed by cutouts at corresponding waveguide positions. The matching unit is arranged within the standard waveguide aperture regions and is E-shaped, comprising one transverse stub and three longitudinal stubs, with the middle longitudinal stub corresponding to the stripline. This invention utilizes the simple structure of the E-shaped matching unit. The two U-shaped portions formed by the three longitudinal stubs and one transverse stub of the E-shaped structure all possess capacitive characteristics, and these characteristics change little with frequency, resulting in better broadband matching performance. Compared to a conventional square matching structure, the E-shaped matching structure achieves a wider matching effect and reduces the precision requirements during actual assembly.

The invention belongs to the technical field of antennas, and particularly relates to a broadband and wide-angle scanning dual-circularly-polarized circular waveguide antenna array. The unit of the antenna array comprises a feed port, an impedance matching structure, a circular polarizer, a metal waveguide wall and a dielectric material filled in the waveguide. The two feed ports correspond to left-hand circular polarization and right-hand circular polarization; the circular polarizer converts linearly polarized electromagnetic waves from a port into two electromagnetic waves which are vertical in direction, equal in amplitude and 90-degree in phase difference, and the two electromagnetic waves are synthesized into circularly polarized electromagnetic waves; a conical dielectric material is loaded at the junction of the dielectric material and an air interface, and smooth impedance conversion from waveguide aperture impedance to free space impedance is provided; and the metal waveguide wall is provided with a conical electromagnetic band gap structure at the waveguide opening. When the antenna works, a signal of a port is changed into a circularly polarized signal after passing through the impedance matching section and the circular polarizer, the circularly polarized signal is radiated out at the waveguide opening, and the array can realize broadband and wide-angle scanning due to the integration of the impedance gradual change structure and the electromagnetic band gap structure.

The present disclosure relates to an antenna device (1) comprising a printed circuit board (2) with a back face (21) and a front face (22). At least one fist high frequency component (3) is configured to transmit and / or receive a radar signal. An antenna layer (4) with a back face (41) and a front face (42) comprises at least one waveguide channel (5) extending from a first waveguide aperture (51) on the back face (41) through the antenna layer (4) to a second waveguide aperture (52) on the front face (42). The back face (41) of the antenna layer (4) is at least partially arranged on the front face (22) of the printed circuit board (2) and the at least one high frequency component (3) is arranged on the back face (21) of the printed circuit board (2) and configured to transmit and / or receive a radar signal to and / or from the first waveguide aperture (51) of the at least one waveguide channel (5) through the printed circuit board (2). At least one signal transmission path (6) is configured to propagate a local oscillator signal from a local oscillator to the at least one first high frequency component (3).

This invention relates to a positioning signal transmission device for electromagnetic compatibility (EMC) testing, comprising a signal generator, a first GNSS fiber optic isolation device, and a second GNSS fiber optic isolation device. The second GNSS fiber optic isolation device is located in a semi-anechoic chamber, while the signal generator and the first GNSS fiber optic isolation device are located in a control room. The first GNSS fiber optic isolation device is connected to the second GNSS fiber optic isolation device via an optical fiber passing through a waveguide aperture. The first GNSS fiber optic isolation device converts the GNSS signal transmitted by the signal generator into an optical signal, and the second GNSS fiber optic isolation device converts the optical signal into a GNSS signal to input the GNSS signal to the sample under test in the semi-anechoic chamber. Transmission is achieved through the electromagnetic stability of the optical signal, which is then converted back into an electrical signal to provide GNSS signal input to the sample under test, making the sample under test more consistent with actual test conditions during EMC testing.