3 results about "Square waveguide" patented technology

A radar system for locating buried pipes and detecting underground liquid leaks, particularly water leaks, with a square waveguide antenna for emitting orthogonally polarized signals of the same frequency. The invention essentially consists of a radar system (1) with an antenna (4) capable of emitting waves at a nominal frequency towards the ground with two distinct and orthogonal polarizations, and incorporating a measuring element (5) capable of measuring the polarimetric ratio of the received signals according to the two polarizations, in order to deduce from the imbalance between the two received signals the presence of a buried pipe, and where applicable, the presence of liquid leaks, particularly water leaks. Figure for the abstract: Fig. 1

Systems and methods are provided for an integrated chip. An integrated chip includes a package substrate including a plurality of first layers and a plurality of second layers, each second layer being disposed between a respective adjacent pair of the first layers. A transceiver unit is disposed above the package substrate. A waveguide unit including a plurality of waveguides having top and bottom walls formed in the first layers of the package substrate and sidewalls formed in the second layers of the package substrate.

This invention discloses a dual-frequency dual-polarization reflective array antenna suitable for 3D metal printing, comprising an array surface and a feed source. The array surface includes several dual-frequency dual-polarization antenna elements. Four high-frequency elements of the same size are arranged in a 2×2 close-fitting manner to form a low-frequency element. The high-frequency element is a four-ridged square waveguide with one end short-circuited. A single low-frequency element can not only achieve dual-frequency dual-polarization and can be directly used as a dual-frequency dual-polarization antenna element, but more importantly, its overall structure is a regular metal structure. The structure is simple and neat, and can be directly designed and manufactured using mature 3D printing technology, greatly reducing costs. This structure can form a large-scale array, making up for the high cost and high loss of existing high-frequency (40-100GHz) microstrip reflective array antennas that must be processed using PCB technology.