31 results about "Microstrip slot antenna" patented technology

The invention discloses a CPW (Co-Planar Waveguide) feeding broadband circular polarization antenna. The antenna comprises a dielectric substrate, elliptic grooves and a coplanar integrated waveguide feeder; the elliptic grooves are formed on the dielectric substrate; and the coplanar integrated waveguide feeder is arranged in the elliptic grooves, wherein the two elliptic grooves are of a symmetrical structure. The CPW feeding broadband circular polarization antenna has an actually measured impedance bandwidth of about 5.4GHz (which is 112.5 percent relative to a center frequency) and has a 3dB axial ratio bandwidth of 5.5GHz (which is 109 percent relative to the center frequency); and the impedance and axial ratio bandwidth of the CPW feeding broadband circular polarization antenna are greater than those of a currently disclosed single-feeding circular polarization microstrip slot antenna. Moreover, the CPW feeding broadband circular polarization antenna has the bidirectional radiation characteristic and respectively radiates right-hand circular polarized waves and left-hand circular polarized waves in the +z and -z directions.

The invention discloses an ultra-high-frequency sensor for monitoring partial discharge in a switch cabinet online. The ultra-high-frequency sensor comprises a micro-strip slot antenna and an SMA (Sub-Miniature A) connector, wherein the micro-strip slot antenna comprises a dielectric substrate, wherein a grooved metal grounding plate is arranged on one side of the dielectric substrate, and the micro-strip slot antenna is arranged on the opposite side of the dielectric substrate; the SMA connector is electrically connected with the micro-strip slot antenna. From an overall perspective, the shape of the groove in the metal grounding plate is an inverted U shape; a detail design adopts a meander technology, and the path of exciting current on the surface of the metal grounding plate is changed by bending, so that the miniaturization of an antenna is realized. In application, the ultra-high-frequency sensor is light in weight, small in size and easy to manufacture, and is beneficial to be arranged in the switch cabinet; meanwhile, the sensitivity is high; a feed structure is simple and compact; the loss of a feed line is low. Simulation and experiments prove that the return loss of the sensor in a bandwidth range is less than -10 dB; in addition, the impedance matching with a standard 50-Ohm coaxial transmission line is effectively realized by optimizing micro-strip feed line parameters and feed positions.

The invention relates to a non-refrigeration millimeter-wave / infrared lamination detector which includes a microstrip antenna, a non-refrigeration detector element and a readout circuit. The microstrip antenna is bonded on the back of the non-refrigeration detector element through an adhesive. The front face of the non-refrigeration detector element is connected with the readout circuit through connection columns. One face of an insulating dielectric substrate of the microstrip antenna is a grapheme conductive thin film, and gaps etched on the grapheme conductive thin film are distributed into an array. On the other face of the insulating dielectric substrate, a metal feed line is printed at a position corresponding to each gap in the grapheme conductive thin film. When rays which include millimeter waves and infrared radiation shoot into a double-mode detector, firstly the millimeter waves are received through the microstrip gap antenna and then incident infrared rays are received by the non-refrigeration detector element so that dual-mode lamination detection is realized.

The invention discloses a dual-polarized microstrip slot antenna for an LTE frequency band. The antenna comprises a metal reflection plate, a first PCB dielectric substrate and a second PCB dielectric substrate, wherein the top surface and the bottom surface of the first PCB dielectric substrate and the top surface of the second PCB dielectric substrate are all coated with copper layers; the copper layer on the top surface of the first PCB dielectric substrate is at least provided with two groups of mutually orthogonal coupling slots used for radiating electromagnetic waves; the copper layer on the bottom surface of the first PCB dielectric substrate is at least provided with two groups of mutually orthogonal feed circuits used for exciting mutually orthogonal electric fields; and the copper layer on the top surface of the second PCB dielectric substrate is provided with a metal radiation patch used for coupling the electromagnetic waves from the coupling slots and generating parasitic radiation. By implementing the dual-polarized microstrip slot antenna for the LTE frequency band, a radiation unit and the feed circuits are integrated, so that the antenna is small in volume, low in profile, high in isolation degree and easy to integrate, and can cover the whole LTE frequency band.