5results about How to "Good circular polarization performance" patented technology

The application discloses a heart-shaped broadband circularly polarized patch antenna, which comprises a dielectric substrate, a heart-shaped radiation patch, a microstrip feed line and a ground plate. A characteristic mode analysis method suitable for irregular geometric shapes is proposed, that is, a plurality of non-orthogonal characteristic modes are used to realize a broadband circularly polarized antenna. The application has the advantages of simple structure, beauty, compactness, simple feed mode, wide impedance and axial ratio bandwidth, and stable radiation pattern. The new method has clear physical mechanism, simple steps and wide application prospect.

This invention discloses a heterogeneous array with circularly polarized wide-angle scanning and omnidirectional coverage, comprising a dielectric substrate, a metal surface A, a metal surface B, a top element, side elements, and a feed probe A. The top and side elements are connected to the dielectric substrate, and the six side elements are all connected to the metal surface A via the feed probe B. The metal surface A is connected to the dielectric substrate, and the metal surface B is connected to the metal surface A. This invention features a small number of antenna elements, a small size, low manufacturing cost, and the ability to perform circularly polarized wide-angle scanning in any azimuth.

The application relates to an ultra-wideband circularly polarized Vivaldi antenna, which comprises a rotationally symmetric antenna and a feed network; the rotationally symmetric antenna is arranged on the feed network; the rotationally symmetric antenna comprises four Vivaldi antenna units, the four Vivaldi antenna units are orthogonally arranged in sequence, and are fixedly connected with the feed network; each Vivaldi antenna unit comprises a radiation arm, a first ground plane and a substrate; the radiation arm and the first ground plane are arranged on a first surface of the substrate, and a first side of the radiation arm is connected with the first ground plane; the first ground plane of a latter Vivaldi antenna unit is connected with a second side of the radiation arm of a former Vivaldi antenna unit, and serves as a second ground plane of the former Vivaldi antenna unit. The application adopts a half-mode form of the Vivaldi antenna, the antenna has a symmetrical and stable radiation pattern and a compact aperture size through structural multiplexing of the ground planes of the antenna units; and the antenna has good circular polarization performance in combination with the feed network which has good amplitude and phase responses.

The utility model relates to the technical field of antennas, in particular to a miniaturized four-arm spiral dipole antenna, which comprises a high-frequency dielectric substrate, and antenna units are arranged on the upper surface and the lower surface of the high-frequency dielectric substrate. The two antenna units are arranged on the upper surface and the lower surface of the high-frequency dielectric substrate respectively, so that the overall size of the antenna is remarkably reduced, the multiple spiral arms are spirally arranged in the circumferential direction of the cross-shaped loading piece, the high-frequency dielectric plate is introduced into the middle of the antenna units with the upper-layer spiral structure and the lower-layer spiral structure, and therefore the high frequency reduction effect is achieved; the axial ratio performance of the antenna can be effectively optimized, the circular polarization effect is improved, the signal receiving and transmitting stability is enhanced, meanwhile, the radiation efficiency of the antenna is improved through a double-helix structure formed by the cross-shaped loading pieces on the upper surface and the lower surface of the high-frequency dielectric substrate and the multiple helix arms, the miniaturization of the antenna is ensured, and meanwhile the antenna is more compact. Good performance can still be kept, manufacturing and integration are facilitated, the production cost is reduced, and the market competitiveness is improved.

The utility model relates to the technical field of antennas, in particular to a circularly polarized antenna and a wearable device. The circularly polarized antenna comprises a grounding plate which is provided with a feed port; the feed body is provided with a first coupling end and a second coupling end, and the first coupling end is electrically connected with the feed port; one end of the first radiator is connected with the second coupling end, and the other end of the first radiator is connected with the grounding plate; one end of the second radiating body is connected with the second coupling end, the other end of the second radiating body is separated from the grounding plate, and the second radiating body and the first radiating body are located on the two sides of the feed body respectively in the circumferential direction of the grounding plate. The first radiating body is grounded, so that when the circularly polarized antenna works, the current intensity of the grounding end of the first radiating body is relatively high, that is, current exists on the antenna branch knot and certain current exists on the grounding plate, and the current distribution on the left side and the right side is relatively uniform, so that a circularly polarized directional diagram is relatively symmetrical and stable; and the circular polarization effect of the circular polarization antenna is improved.