5 results about "Coaxial antenna" patented technology

The present invention belongs to the field of rock mass crack research experiments. Provided is a test system for real-time permeability enhancement based on microwaves. The test system comprises: a microwave generator, a straight waveguide, an omnidirectional-irradiation coaxial antenna mechanism and a permeability test mechanism, wherein an output end of the microwave generator is connected to the straight waveguide, and an output end of the straight waveguide is provided with the omnidirectional-irradiation coaxial antenna mechanism; each annular assembly comprises a ceramic inner ring and a metal outer ring; and a microwave irradiation opening is formed between two adjacent annular assemblies, such that microwaves irradiate outwards via the microwave irradiation opening. By means of the present invention, diffused microwaves are formed inside a specimen, and the microwaves are uniformly distributed in all directions inside the specimen via the microwave irradiation opening, thereby expanding the microwave action range; and during the process, flow rate changes are recorded in real time, so as to comprehensively reflect the permeability of the specimen, thereby simulating the real-time evolution characteristics of permeability during the in-situ microwave modification of a reservoir.

The application belongs to the electromagnetic field and microwave technology field, and particularly relates to a common-caliber antenna array with three-frequency and ultra-wideband electromagnetic self-compatibility characteristics. The three-frequency electromagnetic self-compatibility base station common-caliber antenna array comprises a double-frequency self-compatibility low-frequency antenna, a medium-frequency antenna array, a high-frequency antenna array and a three-frequency self-compatibility array reflection floor; the ultra-wideband electromagnetic self-compatibility common-caliber base station antenna array comprises a wideband self-compatibility low-frequency antenna, an ultra-wideband antenna array and a wideband self-compatibility array reflection floor. The medium-frequency antenna array is composed of M1xM1 medium-frequency antenna units with the same structure. The high-frequency antenna array (3) is composed of M2xM2 high-frequency antennas (6) with the same structure. The ultra-wideband antenna array is composed of NxN ultra-wideband antenna units with the same structure. In the application, the working frequency band of the three-frequency electromagnetic self-compatibility common-caliber base station antenna array is 0.79-1.0 GHz, 1.7-2.7 GHz and 3.1-4.1 GHz; the working frequency band of the ultra-wideband electromagnetic self-compatibility common-caliber base station antenna array is 0.69-0.96 GHz and 1.6-3.2 GHz.

The utility model discloses an eight-row coaxial antenna for the communication field, and relates to the technical field of communication. The eight-row coaxial antenna used in the communication field comprises an eight-row coaxial antenna body and a mounting head connected with the eight-row coaxial antenna body, and the eight-row coaxial antenna body is fixedly erected on a supporting device such as a telegraph pole through the mounting head. According to the device, a displacement mechanism composed of an arc-shaped seat, a guide block, a tooth block, an arc-shaped tooth plate and a bidirectional threaded rod is arranged between an installation head and eight rows of coaxial antenna bodies, and a steering assembly composed of a supporting screw rod and a supporting column is arranged. The eight rows of coaxial antenna bodies can be controlled to carry out transverse and vertical arrangement position regulation and control relative to the mounting head, external objects are prevented from being in contact with the eight rows of coaxial antenna bodies, it is ensured that the communication transmission angle of the eight rows of coaxial antenna bodies meets the transmission requirement, and the eight rows of coaxial antenna bodies carry out stable signal transmission.

A multi-use antenna mount that can be used in a variety of different configurations for holding and mounting one or more antennas in different orientations may include a cylindrically (or prismatic) shaped, hollow main body and four different attachment points on multiple surfaces of the main body. In some embodiments, a first attachment point is a coaxial antenna cable connector. A second attachment point is a top, internally-threaded, coupler nut that can accept externally-threaded antenna elements. A third attachment point is a bottom, externally-threaded stud. A fourth attachment point is a recessed, internally-threaded hole disposed through a recessed flat surface on a side wall of the antenna mount's main body. All electrical connections are made inside of the hollow body of the antenna mount. A plurality of small radial holes may be used to mechanically attach and electrically connect a plurality of radial ground wires.

The present application provides a kind of 915 MHz MPCVD device for 16 inch diamond wafer deposition, it is related to microwave plasma chemical vapor deposition technical field.The device includes shell, cavity is equipped in shell, microwave entrance is equipped in the top of shell, coaxial antenna is installed in the cavity of shell, gas inlet is equipped on coaxial antenna, gas outlet and substrate are equipped in the bottom of shell, gas inlet, gas outlet communicate cavity;Multiple microwave dielectric windows are arranged on the inner wall of shell.The present application is changed by being provided with multiple microwave dielectric windows, microwave transmission path length and phase, makes two microwave electric field areas be connected as a whole, and excites plasma, and the plasma region formed is located on substrate.The device generates continuous diameter 16 inch TM02 microwave electric field on substrate by the design of resonant cavity structure, microwave dielectric shape and position, excites large size plasma region, realizes 16 inch diamond wafer deposition.