2 results about "SMA connector" patented technology

The invention discloses an online diesel exhaust fluid solution concentration monitoring system for an automobile SCR (Selective Catalytic Reducer) system. The online diesel exhaust fluid solution concentration monitoring system comprises a power module, a coil design module and a data acquiring and processing module, which are sequentially connected through SMA (SubMiniature version A) connectors, wherein the coil design module comprises a transmitting coil, a urea tank and a receiving coil; the urea tank is used for being filled with a urea solution; the transmitting coil and the receiving coil are arranged at the outer side of the urea tank; the transmitting coil is connected with the power module through the SMA connector; the receiving coil is connected with the data acquiring and processing module through the SMA connector. The online diesel exhaust fluid solution concentration monitoring system avoids the contact between the measuring coil and the urea solution, adopts a self-resonance mode of the coil, and improves the sensitivity of the voltage at the two ends of the coil on change of concentration of the urea solution. The invention further discloses a monitoring method of the online diesel exhaust fluid solution concentration monitoring system for the automobile SCR system.

The invention discloses a hidden type feed ridge waveguide slot antenna. The hidden type feed ridge waveguide slot antenna comprises a slot leaky wave ridge waveguide and a ridge waveguide coaxial converter which are in mutual connection; the slot leaky wave ridge waveguide comprises a ridge waveguide and a plurality of radiation slots formed in the upper surface of the ridge waveguide; the ridgewaveguide coaxial converter comprises a ridge waveguide cavity and an SMA connector; convex grooves are formed in the ridge waveguide and the lower bottom surface of the ridge waveguide cavity; the cross sections of the ridge waveguide and the ridge waveguide cavity are inversely concave-shaped; a metal table is arranged in the convex groove of the ridge waveguide cavity; the SMA connector is arranged in the metal table in a penetration manner; by virtue of reasonable radiation slot layout on the ridge waveguide, an effect of high gain and low side lobe is achieved; the metal table is arrangedin the ridge waveguide coaxial converter, and the SMA connector is hidden in the ridge waveguide coaxial converter, so that an effect of reasonable space utilization and SMA connector protection is achieved; and in addition, an effect of reducing the antenna dimension is also realized.