Zhao Yingchao

Bio: Zhao Yingchao is an academic researcher. The author has contributed to research in topics: Dipole antenna & Planar. The author has an hindex of 1, co-authored 1 publications receiving 3 citations.

Planar dipole antenna with low inhibition characteristic

Abstract: The invention relates to a planar dipole antenna with a low inhibition characteristic, and mainly aims at improving the anti-interference and electromagnetic compatibility performances of a radar. Theantenna comprises a planar radiation unit, a band shaped line and SIW conversion unit and a double-layer common-ground substrate integrated waveguide. The planar radiation unit uses a dipole antennabased on a band shaped line form; the double-layer common-ground substrate integrated waveguide is composed of two substrate integrated waveguide layers which share the intermediate metal ground; anda central conductor of the planar radiation unit is connected to the intermediate metal ground via the band shaped line and SIW conversion unit and the double-layer common-ground substrate integratedwaveguide, impedance match between the band shape and the substrate integrated waveguide is realized, and the planar radiation unit includes the low inhibition characteristic of the substrate integrated waveguide. The planar dipole antenna with the low inhibition characteristic is designed via the band shaped line form, low-loss conversion integration between the band shaped line and the substrateintegrated waveguide is realized successfully, and a basis is provided for improving the low-frequency filtering characteristic of the radar in the front end.

Wide-angle scanning dual-linearly-polarized phased array antenna

Abstract: The invention provides a wide-angle scanning dual-linearly-polarized phased array antenna, comprising vertically polarized waveguide slot antennas and horizontally polarized micro-strip umbrella-shaped oscillator antennas which are alternately arranged. The waveguide slot antennas radiate vertically polarized electromagnetic waves with the electric field direction perpendicular to the slots to a free space, and the micro-strip umbrella-shaped oscillator antennas radiate horizontally polarized electromagnetic waves with the electric field direction parallel to the oscillators. The two kinds ofpolarized antennas are expanded into arrays in the horizontal and vertical dimensions respectively and do not occupy the space of each other, and thus, the aperture utilization efficiency is improved.Because of small unit distance, large-angle scanning capacity is achieved. The waveguide slot antennas and the array plane of the feed network of the waveguide slot antennas are in the horizontal direction and serve as a metal reflection floor of the micro-strip oscillator antennas. The array plane of the micro-strip oscillator antennas is in the vertical direction, and plays a role in reducing mutual coupling between waveguide slot antenna units.

Adjustable intermodulation calibration source based on medium integrated waveguide

Abstract: The invention discloses an adjustable intermodulation calibration source based on a medium integrated waveguide. The medium integrated waveguide section, a waveguide conversion section and an input end are all located on a medium layer, and the waveguide conversion section is connected to the input end and the medium integrated waveguide section. An annular groove is disposed on the upper surfaceof the medium integrated waveguide section. A non-linear electric dipole arm is located on the upper surface of the medium integrated waveguide section, and the non-linear electric dipole arm is located in the annular groove. A polarized slot is disposed on the non-linear electric dipole arm. A diode is connected to both ends of the polarized slot. A RF signal source is connected to one end of themedium integrated waveguide section through the input end and the waveguide conversion section, and an absorption load is connected to the other end of the medium integrated waveguide section. A cavity is disposed inside the medium layer. The adjustable intermodulation calibration source enables calibration of PIM test instruments over the full test range.

Double-sided output broadband power divider of multilayer substrate integrated waveguide

Abstract: The invention discloses a double-sided output broadband power divider of a multilayer substrate integrated waveguide. The double-sided output broadband power divider comprises a top metal layer, a middle dielectric substrate and a back metal layer. The top metal layer, the middle dielectric substrate and the bottom metal layer are sequentially distributed from top to bottom. The top metal layer isconnected with the bottom metal layer. The top metal layer comprises an input matching line structure, a top full-mode substrate integrated waveguide transmission structure, a top full-mode substrateintegrated waveguide distribution structure, a top output matching line structure and a top output turnover metal conductive ground structure. The bottom metal layer comprises an input matching linestructure bottom layer, a bottom full-mode substrate integrated waveguide transmission structure, a bottom full-mode substrate integrated waveguide distribution structure, a bottom output matching line structure and a bottom output overturning metal conductive ground structure. Good return loss can be obtained on a wide bandwidth, and the purpose of equal-amplitude reverse output is achieved.