4results about How to "Impedance matching" patented technology

The present application discloses a duckbill antenna, belonging to the field of antennas, which includes an antenna radiator made of metal parts, a substrate, and a signal chip connected to the antenna radiator; the routing shape of the antenna radiator includes a "mountain" shape; the "mountain" shape includes: an "M"-shaped feeder surrounded by feeders at a grounding point, and an "I"-shaped feeder installed on the substrate near the center of the "M"-shaped feeder; a connector connected to the "M"-shaped feeder is welded on the substrate, and the connector is connected to the "I"-shaped feeder; an adjustment circuit for adjusting the frequency band is installed on the side of the substrate away from the antenna radiator. The present application has the effect of improving the antenna gain.

The invention relates to an ultra-wideband structure for a Wilkinson power divider, which belongs to the field of ultra-wideband power dividers, and comprises an input port, a first output port and a second output port, each port is provided with a microstrip line and is directly connected with an external circuit through the microstrip line; the slow transition between the microstrip line and the coplanar waveguide is realized through the gradual change microstrip line, and the continuity of high-frequency-band signal transmission is improved. According to the ultra-wideband power divider, the first input branch, the first output branch and the second output branch are connected through the trapezoidal ring, impedance matching and signal isolation are achieved, design parameters of the trapezoidal ring are simple, the effects of reducing the size of the power divider and reducing the parasitic effect are achieved, and the performance of the ultra-wideband power divider is directly improved.

A gradient impedance-gradient multi-fiber hybrid broadband absorbing structure is provided, comprising a multi-fiber preform and a low-loss matrix. The low-loss matrix fills within the multi-fiber preform and covers it, with a covering thickness of <0.2 mm. The multi-fiber preform is formed by weaving together high-loss, medium-loss, and low-loss fibers. The multi-fiber preform includes an impedance matching layer formed by low-loss fiber weaving, an impedance transition layer formed by mixing low-loss and medium-loss fibers, and an absorption attenuation layer formed by mixing medium-loss and high-loss fibers. The impedance matching layer, impedance transition layer, and absorption attenuation layer are stacked sequentially to form a three-dimensional structure. This invention can effectively control its microwave electromagnetic characteristics, achieve a reasonable impedance gradient change, and significantly improve broadband absorption performance.

The invention relates to the technical field of antennas, and provides a beam broadening device which comprises a corner reflector and a supporting structure which can be arranged on a fuze antenna, an electromagnetic metamaterial plate used for increasing the beam width is erected on the supporting structure, and the corner reflector is located in an interval defined by the electromagnetic metamaterial plate and the supporting structure. The invention further provides a wide-beam fuze antenna module, the wide-beam fuze antenna module comprises a fuze antenna and the beam broadening device, the fuze antenna comprises a groove waveguide, a radiation slot is formed in the upper surface of the groove waveguide, and the beam broadening device is arranged on the upper surface of the groove waveguide. The invention further provides a guided weapon which is characterized by comprising the wide-beam fuze antenna module. According to the invention, the corner reflector is adopted to improve the gain of the fuze antenna, and then the wave beam width of the azimuth plane is improved through the electromagnetic wave metamaterial plate, so that the non-blind area design is realized.