Printed circuit board mounted antenna and waveguide interfaces are provided herein. An example device includes any of a dielectric substrate or transmission line, an antenna mounted onto the dielectric substrate, and an elongated waveguide mounted onto the dielectric substrate so as to enclose around a periphery of the antenna and contain radiation produced by the antenna along a path that is coaxial with a centerline of the waveguide.

The present disclosure relates to a phase shifter, an accelerator, and an operating method therefor. The phase shifter comprises a rotating part having a first hollow structure, the first hollow structure having a first cavity, a distance between a circumference of the cross section of the first cavity and a rotation center of the rotating part changing periodically and continuously in a peripheral direction, such that when the rotatory part rotates, a phase shift occurs between two adjacent microwave pulses at an outlet of the phase shifter. The operating method comprises transmitting a microwave pulse within the accelerator at a repetitive frequency v Hertz; the driving devices drives the rotating part to rotate at a rotation speed of n RPM, wherein n=15v*m, m is an odd number, 1, 3, 5 . . . , such that when transmitting a microwave pulse each time, the long axis of the oval cross section of the first cavity of the rotatory part is rotated to a horizontal or vertical state.

The invention relates to a waveguide arrangement for guiding electromagnetic waves, which comprises a rectangular waveguide and a circular waveguide. The rectangular waveguide merges into the circular waveguide at an angle. The circular waveguide is filled with a dielectric which projects into the rectangular waveguide in a transition section. The dielectric filling is beveled at a defined angle in the transition section so that a transition surface is formed by the inner edge at the transition of the waveguide arrangement and the end face of the rectangular waveguide at the transition. The dielectric filling is preferably flush with the closing wall of the rectangular waveguide.

An enhanced hybrid-tee coupler (EHT-coupler), the EHT-coupler is described. The EHT-coupler includes a first waveguide, second waveguide, third waveguide, and fourth waveguide. The first waveguide defines a first port and the second waveguide defines a second port. Similarly, the third waveguide defines a fourth port and the fourth waveguide defines a fourth port. The first, second, third, and fourth waveguides meet in a single common junction and the first waveguide and second waveguide are collinear. The third waveguide forms an E-plane junction with both the first waveguide and the second waveguide and the fourth waveguide forms an H-plane junction with both the first waveguide and the second waveguide. The EHT-coupler also includes a first impedance matching element positioned in the common junction where the first impedance matching element includes a base and a tip.

A probe calibration device that includes a first offset element having a substantially rectangular first aperture. The probe calibration device includes a tuned pass element disposed adjacent to the first offset element. The tuned pass element has a non-rectangular second aperture. The probe calibration device includes a second offset element disposed adjacent to the tuned pass element and on a side opposite the first offset element. The second offset element has a substantially rectangular third aperture. The probe calibration device includes a backing element disposed adjacent to the second offset element. The first offset element, the tuned pass element, the second offset element and the backing element form a cavity.

Provided is a waveguide connection structure 1 in which two waveguides 10 and 20 respectively formed with waveguide paths 11 and 21 face each other, in which a choke groove 25 having a depth corresponding to a leakage prevention target frequency is provided, at the end face 20a of the waveguide 20, in a band-shaped region whose center is a center of the waveguide path 21, and which is bounded by an inner ellipse and an outer ellipse, the minor radius of the outer ellipse is longer than the minor radius of the inner ellipse by a length corresponding, and the choke groove 25 includes two groove portions 25a and 25b that are in contact with the inner ellipse and the outer ellipse and are located on the longer side of the rectangle, in the band-shaped region.

A waveguide coupler comprising: a first coupling portion arranged to couple with a first waveguide and a second coupling portion arranged to couple with a second waveguide so as to connect the first waveguide and the second waveguide together; wherein arranged between the first and second coupling portions is a wave modulation portion arranged to modulate wave signals transferred between the first waveguide and the second waveguide.

A device and method for transitioning between a rectangular waveguide (RWG) and a substrate integrated waveguide (SIW) or air-filled SIW (AFSIW) in millimeter wave communication systems. The transition apparatus includes a pair of hollow metallic structures, each featuring a tapered body connecting RWG and SIW (or AFSIW) interfaces. The tapered bodies facilitate a seamless transition with lengths ranging from approximately 1 mm to 15 mm, accommodating SIW and AFSIW substrate heights from about 0.2 mm to 1.0 mm. The apparatus ensures impedance matching within a specified range, maintains a voltage standing wave ratio between 1 and 5, and achieves a total reflection coefficient between 20 dB and 10 dB. Additionally, the apparatus exhibits high modal purity, with dominant mode levels between 1 dB and 0.25 dB, and significantly attenuated non-dominant modes. The apparatus supports efficient signal transmission within the frequency range of approximately 50 GHz to 75 GHz.

A wireless transmission system comprising a main circuit board having a first controller and a first connector assembly associated therewith; a removable and replaceable radio frequency module for transmitting and receiving wireless data, wherein the radio frequency module includes a second controller, a first module connector assembly, and a second connector assembly that is configured to couple to the first connector assembly; a removable and replaceable diplexer module for sending and receiving the wireless data at different frequencies, wherein the diplexer module includes a storage element, a first waveguide port connector, and a second module connector assembly that is configured to couple to the first module connector assembly; and a transition waveguide module having a second waveguide port connector that is configured to couple to the first waveguide port connector.

A multilayer substrate (11) includes: a first dielectric layer (41) having a first conductive layer (21) on one side and a second conductive layer (22) on another side; a second dielectric layer (42) having a third conductive layer (23) on one side and a fourth conductive layer (24) on another side, the third conductive layer (23) being located apart from the second conductive layer (22); one or a plurality of intermediate dielectric layers (43) provided between the second conductive layer (22) and the third conductive layer (23); and a waveguide (31) which is a conductive tubular member contacting with an inner peripheral surface of a through hole penetrating through specific parts of the intermediate dielectric layers (43) in a direction from the second conductive layer (22) to the third conductive layer (23), an inside of the tubular member being filled with a dielectric material made of a material different from the first dielectric layer (41), the second dielectric layer (42), and the intermediate dielectric layer (43). A cross-section of the waveguide (31) along a direction perpendicular to a direction of penetration through the intermediate dielectric layers (43) has a shape obtained by cutting out both corners on one diagonal line of a quadrangular shape.