8 results about "Axial ratio bandwidth" patented technology

The application discloses a kind of super surface circularly polarized antennas, belong to wireless communication technical field, including: super surface, super surface includes a plurality of first super surface units and a plurality of second super surface units arranged in array, first super surface unit is located in the periphery of second super surface unit, and second super surface unit is the symmetrical structure formed by cutting first super surface unit;Dielectric substrate, dielectric substrate includes upper layer dielectric substrate and lower layer dielectric substrate;Driving patch, driving patch is located between upper layer dielectric substrate and lower layer dielectric substrate;Metal floor, metal bottom plate is arranged on the lower surface of lower layer dielectric substrate;Microstrip feed structure, through coupling gap and driving patch non-contact coupling;By unit array optimization, phase difference is generated in orthogonal radiation mode, and circularly polarized radiation is realized.50 ohm microstrip line feeding is used, and non-contact coupling excitation is realized by coupling gap and driving patch;Synergistic design realizes 31.5% impedance bandwidth, 20.4% axial ratio bandwidth, and full coverage WBAN5.15-5.825GHz frequency band.

This invention relates to the field of phased array antenna technology, specifically disclosing a low-profile broadband circularly polarized phased array antenna element, antenna array, and fabrication method. The antenna includes a body and interconnected feed layers disposed at the bottom of the body. The body comprises, from top to bottom, a parasitic patch, a first dielectric layer, a radiating patch, and a second dielectric layer. A metallized via, coaxial with the body and interconnected with the radiating patch, is disposed on the second dielectric layer. The feed layer is interconnected with the metallized via. A U-shaped slot is disposed on the radiating patch. The metallized via is located within the U-shaped region formed by the U-shaped slot. Compared with the traditional eccentric feeding method, this invention reduces the antenna profile height, lowers fabrication costs, broadens the impedance bandwidth and axial ratio bandwidth, and optimizes the antenna's axial ratio performance.

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 sequentially rotating broadband high-gain circularly polarized antenna, a conformal antenna, and their design methods. The antenna comprises two stacked dielectric substrates, with a radiating structure disposed on the upper surface of the upper substrate. The radiating structure includes a circularly polarized core unit and parasitic patches arranged around it. Connecting patches within the core unit introduce a 90° phase difference between two adjacent sides of the closed-loop patch, exciting circularly polarized radiation and establishing a sequentially rotating phase difference coupling field on the periphery. The parasitic patches obtain coupled feeding through the coupling field to broaden the bandwidth and improve gain. Coupling patches are arranged oppositely between the upper and lower substrates to improve impedance matching. When using a flexible substrate, the antenna maintains broadband circular polarization characteristics and a stable radiation pattern even when bent. This invention achieves an impedance bandwidth of 5.1–7.29 GHz, an axial ratio bandwidth of 5.28–6.77 GHz, a peak gain of 12.14 dB, and cross-polarization below -15 dB, making it suitable for 5G / 6G communication and satellite communication systems.

This invention discloses a broadband filtered L / S band circularly polarized-Ku band MIMO common-aperture antenna, relating to the field of microwave communication technology. The antenna includes a crossed dipole radiator, a dielectric substrate, four rectangular patches, four metal strips, a metal ground plane, a probe for exciting the Ku band MIMO antenna, and a feed axis for exciting the L / S band circularly polarized antenna. The crossed dipole radiator consists of rectangular patches and phase delay lines located on the upper and lower surfaces of the upper dielectric substrate. The phase delay lines provide a 90° phase difference, thus forming circularly polarized radiation. The positions of the rectangular patches and metal strips on the upper and lower surfaces induce coupling, broadening the impedance bandwidth and axial ratio bandwidth of the L / S band antenna. This invention features a simple structure, low cost, and superior performance. Furthermore, it achieves high isolation between the two frequency bands through a closed substrate integrated waveguide, and the Ku band antenna can also improve the performance of the L / S band antenna.

This invention discloses a wide-bandwidth and wide-beam single-fed circularly polarized antenna element for the Ka band, relating to the field of satellite communication antenna technology. The antenna element comprises a multilayer dielectric substrate, a circular radiating patch, a metal ground layer, cross-shaped slots, arc-shaped slots, metal short-circuit posts, a microstrip feeding structure, and peripheral metal short-circuit vias. The cross-shaped slots consist of two intersecting slots of unequal length and four arc-shaped slots of unequal length, used to excite two orthogonal resonant modes; the four arc-shaped slots are located at the ends of the two intersecting slots to achieve miniaturization of the slot structure and improve the purity of circular polarization at low elevation angles; the metal short-circuit posts are used to improve the isolation between slots; the microstrip feeding structure achieves circularly polarized radiation through single-port coupling feeding. This antenna element can cover the Ka band from 27.5 GHz to 31 GHz and has advantages such as wide impedance bandwidth, wide axial ratio bandwidth and wide axial ratio beam, miniaturization, and ease of integration with active chips and feeding networks, making it suitable for satellite communication terminals and phased array antennas.

The application discloses a wideband high-gain circularly polarized antenna based on a rhombic metamaterial hollow stacking structure, and belongs to the technical field of microwave antennas.The technical problem to be solved by the application is how to design a rhombic metamaterial circularly polarized resonator antenna with simple structure, wide axial ratio and high gain.The rhombic metamaterial hollow stacking structure stacks rhombic metamaterial units, and gap loading foam is used for support;based on the super material and the gap coupling therebetween, multi-mode resonance and combined mode split radiation circular polarization are generated, wideband high-gain circularly polarized radiation is realized, and the advantages of convenient processing, simple structure, wide axial ratio bandwidth and high gain are achieved, and the design freedom is increased.