30results about How to "Good omnidirectional radiation performance" patented technology

A photonic band gap ceramic Sierpinski fractal antenna used in a radio frequency identification system relates to a microstrip antenna, in particular to a photonic band gap ceramic Sierpinski fractal antenna used in a radio frequency identification system. The invention provides a photonic band gap ceramic Sierpinski fractal antenna which is used in a radio frequency identification system and is characterized by small size, wide bandwidth, low return loss and omnidirectional radiation property. The antenna is provided with a ceramic substrate, both two sides of the ceramic substrate are provided with a silver coating respectively, wherein, the silver coating on one side is a Sierpinski fractal antenna radiation patch, and the silver coating on the other side is an antenna ground plane, the antenna ground plane is provided with a rectangular hole array photonic band gap structure, and antenna feed points are arranged on the Sierpinski fractal antenna radiation patch.

A ceramic tree fractal dipole antenna with gradually changing dielectric coefficients relates to a dipole antenna. The invention provides a ceramic tree fractal dipole antenna with gradually changing dielectric coefficients, which has a small size, large bandwidth, low return loss and omnidirectional radiation characteristics. The antenna is provided with a ceramic base plate with one surface coated with silver, and the silver coating is a tree fractal dipole antenna radiation patch. The ceramic base plate is composed of at least nine ceramic material layers with gradually changing dielectric coefficients, and the dielectric coefficient of each ceramic material layer changes arithmetically and linearly. Each ceramic material layer is preferably a rectangular ceramic material layer. The ceramic material layers are in the same size, and have of a length of 26(+/-)1mm, a width of 12(+/-)1mm and a thickness of 0.1(+/-)0.01mm. The antenna has a small size, large bandwidth, good radiation characteristic, simple manufacturing technology, low cost and excellent omnidirectional radiation performance, and is simply structured and easily integrated. The antenna can meet the specific requirements on the antenna in an RFID application system.

The invention provides a photo strip-gap ceramics Kontol fractal micro-strip antenna for radio frequency identification system, relates to a micro-strip antenna. The photo strip-gap ceramics Kontol fractal micro-strip antenna for radio frequency identification system has small size, large bandwidth, lower return loss and omnidirectional radiation feature. The micro-strip antenna comprises a ceramic wafer and silver coatings are set on the two surfaces of the ceramic wafer, wherein one silver coating is Kontol fractal wireless radiation patch and another silver coating is rectangular-hole array photo strip-gap structure. The relative dielectric constant of the ceramic wafer is 9+-10%. The shape of the ceramic wafer is rectangle and the side length of the square ceramic wafer is 20mm+-1mm and the length thereof is 1.0mm+-0.05mm. The photo strip-gap ceramics Kontol fractal micro-strip antenna for radio frequency identification system has features of small size, large bandwidth, lower return loss, good omnidirectional radiation feature and easy to integrate. The antenna can satisfy the concrete requirement of a RFID application system to the antenna.

The invention discloses a vertical polarization omni antenna. The vertical polarization omni antenna comprises a base plate, a monopole, a coaxial cable and a short circuit paster. The monopole comprises a first center part and a plurality of first radiation parts. The inner end of each first radiation part is connected with the first center part, each first radiation part extends in the direction far away from the first center part, and the monopole is arranged above the base plate. The short-circuit paster comprises a second center part, a plurality of second radiation parts and a plurality of connecting parts, wherein the inner end of each second radiation part is connected with the second center part, each second radiation part extends in the direction far away from the second center part, the connecting parts are correspondingly connected with the second radiation parts in a one-to-one mode, each connecting part is connected with the base plate, and the short-circuit paster is arranged above the monopole and separated from the monopole. The vertical polarization omni antenna has the advantages of being small in size, simple in structure, easy to machine, low in cost, good in out-of-roundness and cross polarization index, very wide in working frequency band and the like.

The invention relates to a miniaturized broadband tri-polarized antenna, and belongs to the technical field of antennas. The antenna comprises a dielectric cavity placed on a metal bottom plate,wherein an antenna vertical radiator part is printed on the surface of the dielectric cavity; a radiation cover plate which is arranged right above the dielectric cavity, wherein an antenna horizontal dual-polarized radiator part is printed on the upper surface of the radiation cover plate; two microstrip dielectric plates which are arranged in the dielectric cavity in a crossed manner, wherein microstrip lines are printed on the front surfaces of the microstrip dielectric plates, metal ground planes with gaps are printed on the back surfaces of the microstrip dielectric plates, the upper edges of the metal ground planes are connected with the antenna horizontal dual-polarization radiator part, and the lower edges of the metal ground planes are connected with the metal bottom plate; and a feed substrate which is arranged in the dielectric cavity, wherein an equal power division microstrip matching circuit is printed on the upper surface of the feed substrate. The antenna provided by the invention realizes the broadband and miniaturization of a tri-polarized antenna, and can be used as a base station antenna and an antenna in a mobile communication system to improve the spectrum utilization rate, increase the communication capacity and the like.

The invention provides an omnidirectional antenna. The omnidirectional antenna comprises a first cone and a second cone, the first cone comprises a first circular truncated cone part and a first cylinder, and the second cone comprises a second circular truncated cone part and a second cylinder, wherein the top of the first circular truncated cone part and the top of the second circular truncated cone part are close to each other and are oppositely arranged, the bottom of the first circular truncated cone part is connected with the first cylinder, and the bottom of the second circular truncated cone part is connected with the second cylinder. The antenna has a stable horizontal omnidirectional radiation characteristic, and is simple in structure and easy to implement.

The invention relates to a top-loaded broadband ceiling antenna. The top-loaded broadband ceiling antenna comprises a reflecting plate, an amplitude component and a coaxial cable, wherein the amplitude component is mounted on the reflecting plate; the coaxial cable feeds the amplitude component through the reflecting plate; the amplitude component comprises a first microstrip line, a second microstrip line, a third microstrip line, a fourth microstrip line, a fifth microstrip line and a sixth microstrip line; the first microstrip line is V-shaped, and is in a plane called first oscillator plane; the second microstrip line is V-shaped, and is in a plane called second oscillator plane; the third, fourth, fifth and sixth microstrip lines are in a plane called third oscillator plane; the firstmicrostrip line and the second microstrip line are connected at the respective V-shaped bottoms; the first microstrip line is connected with the third microstrip line and the fifth microstrip line; and the second microstrip line is connected with the fourth microstrip line and the sixth microstrip line. The top-loaded broadband ceiling antenna has the characteristics of simple processing process,easiness in processing, low cost, contribution to the development of enterprises and the like.

The invention provides an omnidirectional broadband WiFi antenna applied to 5G and 6G frequency bands. The antenna comprises: a dielectric substrate provided with a first side surface and a second side surface which are opposite to each other; a coplanar waveguide structure arranged on the first side surface of the dielectric substrate and comprising a central conductor belt and radiation patches symmetrically arranged on the two sides of the central conductor belt; load patches arranged at two ends of the central conductor belt and connected with the central conductor belt; a radiation patch connecting line arranged on the second side surface of the dielectric substrate, wherein the two ends of the radiation patch connecting line are respectively connected with the radiation patches on the two sides of the central conductor belt through metal via holes penetrating through the dielectric substrate; a feeder line arranged on the second side surface of the dielectric substrate and connected with a feeding point on the central conductor belt; and choking wires symmetrically arranged on the two sides of the feeder line and connected with the radiation patch through the metal via holes. The omnidirectional broadband WiFi antenna applied to the 5G and 6G frequency bands can cover the frequency bands of 5.15 to 5.85 GHz and 5.925 to 7.125 GHz at the same time, and has the characteristics of wide broadband, low out-of-roundness and high gain.