32results about How to "Radiation performance impact" patented technology

The invention discloses a feed network for reducing mutual coupling between antenna array units. The feed network can be used in wireless communication and a radar system. The feed network cannot damage initial impedance matching of the antenna array units, and therefore, an impedance matching network is not needed to be designed additionally. Meanwhile, controllable indirect coupling introduced into the feed network can be used for offsetting the direct coupling of the antenna array units on a radiation caliber so as to effectively reduce mutual coupling between the units. The feed network has the advantages of being simple in structure and small in loss and does not influence the radiation performance of an antenna. Two specific implementation forms of the novel feed network are provided, and specific simulation and test results of the examples are given at last.

The present invention provides an antenna device which comprises a metal frame which comprises a first end part and a second end part opposite to the first end part. One end of the first end part extends to form a low frequency radiation part, and the other end extends to form a high frequency radiation part opposite to the low frequency radiation part. The low frequency radiation part is used for connecting a low frequency circuit to receive and send a low frequency signal. The high frequency radiation part is used for connecting a high frequency circuit to receive and send a high frequency signal. The metal frame is the frame of a mobile terminal. The invention also provides the mobile terminal.

The invention discloses a miniature broadband composite antenna, which comprises an upper biconical antenna, a lower biconical antenna, a medium, an antenna cover and a flange plate, wherein a deformed cone frustum structure is adopted in the upper biconical antenna and the lower biconical antenna; a coaxial cable passes through the inside of cone frustums to feed the two antennas; the upper biconical antenna and the lower biconical antenna are isolated with the medium and play a support role; the antenna cover is arranged on the periphery of the overall composite antenna to play a role in fixing and protecting an antenna system to reduce the influence of the external environment to the greatest extent; and the flange plate is added to the bottom part of the composite antenna to play a role in fixing the antenna. The biconical antennas are adopted as a basic form of compounding the antennas; the broadband omnidirectional characteristics of the antenna are achieved; an up-and-down stacked coupled structure is adopted by the two biconical antennas; impedance matching of the antenna can be adjusted when high isolation degree between the two antennas is ensured; the tail end of the cone frustum structure of each antenna unit is turned over; and miniaturization of the antenna is achieved.

The invention provides electronic equipment, which comprises a metal frame, a first insulating dielectric body and a feed pin, wherein an accommodating groove is formed in the metal frame, the first insulating dielectric body is at least partially arranged in the accommodating groove, a feed through hole is formed in the accommodating groove, the feed pin is arranged in the first insulating dielectric body in a penetrating manner through the feed through hole, and the first insulating dielectric body generates electromagnetic radiation under the action of an excitation signal input by the feedpin. According to the invention, the feed pin and the first insulating dielectric body can form a dielectric resonant antenna, and the side wall and the groove bottom of the accommodating groove canbe used as reflectors of the antenna, so that the gain of the antenna is enhanced, namely, the radiation performance of the antenna is enhanced; and the accommodating groove is formed in the metal frame, so that the influence of other parts of the electronic equipment on the radiation performance of the antenna can be reduced so as to further enhance the radiation performance of the antenna.

The invention provides an antenna device, comprising a first radio frequency transceiving circuit, a first matching circuit, a second radio frequency transceiving circuit, a second matching circuit and a metal shell, wherein the metal shell is provided with a micro gap strip and a gap, the micro gap strip comprises a plurality of micro gaps, the gap intersects with the plurality of micro gaps, the micro gap strip is arranged in an edge area adjacent to the short edge of the metal shell, the first radio frequency transceiving circuit is electrically connected with the metal shell via the first matching circuit, and the second radio frequency transceiving circuit is electrically connected with the metal shell via the second matching circuit. The antenna device can ensure the overall appearance effect of a mobile terminal, realizes coverage of the whole frequency band of a main antenna and avoids adverse influence on the radiation performance of the antenna when held by hand. The invention further provides a mobile terminal.

The invention discloses a reconfigurable antenna adopting a reed pipe. The lower surface of a medium substrate is an antenna horizontal plane, and the upper surface of the medium substrate is provided with a microstrip feeder line and a plurality of microstrip patches; the microstrip feeder line extends into one microstrip patch so as to realize impedance matching of the antenna; the microstrip patches are connected by the reed pipe; a control coil is a direct-current control circuit, is placed below the antenna horizontal plane and is positioned right below the reed pipe, and the axis of the control coil is parallel to the reed pipe. In the reconfigurable antenna, the reed pipe is adopted as a magnetic control switch, the control coil is placed below the antenna horizontal plane, and the control magnetic field generated by the control coil can penetrate through the antenna horizontal plane to control the reed pipe, so that the control coil can not cause influence on the radiating performance of the antenna.

The invention discloses an MIMO antenna and a mobile terminal. The MIMO antenna comprises a main set antenna and at least one diversity antenna, and the at least one diversity antenna comprises at least one first antenna; the first antenna comprises a first wiring layer and a shielding layer which are parallel to each other and are arranged in an insulating manner; and the shielding layer is arranged corresponding to the free end of the wire in the first wire layer, so that the incoherence between the antennas can be increased, and the MIMO communication throughput is improved.

The invention provides a mobile device and an antenna structure. The mobile device comprises a metal machine component, a dielectric substrate, a support element, a feed-in radiation part, a ground plane, a short circuit part, a circuit element, a first parasitic radiation part, a second parasitic radiation part and an additional radiation part. The metal machine component is provided with a slotted hole comprising a first closed end and a second closed end; the dielectric substrate is provided with a first surface and a second surface which are opposite; the support element is arranged on themetal machine component and supports the dielectric substrate; the ground plane and the short circuit part are respectively coupled to the metal machine component; the circuit element is coupled between the short circuit part and the first grounding point of the ground plane; the first parasitic radiation part and the second parasitic radiation part are respectively coupled to the ground plane; the additional radiation part is adjacent to or coupled to the feed-in radiation part, the first parasitic radiation part and the second parasitic radiation part, and the additional radiation part is arranged on the first surface of the dielectric substrate; and the feed-in radiation part, the circuit element, the first parasitic radiation part, the second parasitic radiation part, the additional radiation part and the slotted hole of the metal mechanism component form an antenna structure together. The mobile device has the advantages of small size, wide frequency band, beautiful appearance and the like.

The invention provides a shell assembly, an antenna assembly and electronic equipment. The shell assembly provided by the invention comprises a dielectric substrate and a wave-transparent structure. The dielectric substrate has a first refractive index for a radio frequency signal of a preset frequency band. The wave-transparent structure is supported on the dielectric substrate and at least covers part of the dielectric substrate. The shell assembly has a second refractive index for the radio frequency signal of the preset frequency band in an area corresponding to the wave-transparent structure, wherein the second refractive index is less than the first refractive index. According to the shell assembly provided by the invention, the wave-transparent structure is borne on the dielectric substrate, and the refractive index of the shell assembly to the radio frequency signal of the preset frequency band is reduced under the action of the wave-transparent structure, so that the refractive index of the shell assembly to the radio frequency signal of the preset frequency band is closer to the refractive index of a free space; when the shell assembly is applied to the electronic equipment, the influence of the shell assembly on the radiation performance of the antenna module in the shell assembly can be reduced, so that the communication performance of the electronic equipment can be improved.

The invention discloses a mobile device. The mobile device comprises a metal machine component, a dielectric substrate, a grounding plane, a parasitic radiation part and a feed-in radiation part, wherein the metal machine component is provided with a slotted hole which is provided with a first closed end and a second closed end; the parasitic radiation part is provided with a connecting end and anopen circuit end, the connecting end of the parasitic radiation part is coupled to the grounding plane, the parasitic radiation part comprises a first widened part which is located at the bent position of the parasitic radiation part, the parasitic radiation part has a vertical projection on the metal machine component, and the vertical projection of the parasitic radiation part is at least partially overlapped with the first closed end of the slotted hole; the feed-in radiation part is provided with a feed-in point, and the feed-in radiation part is arranged between the parasitic radiation part and the grounding plane; the dielectric substrate is adjacent to the metal machine component, and the parasitic radiation part and the feed-in radiation part are both arranged on the dielectric substrate; and the parasitic radiation part, the feed-in radiation part and the slotted hole of the metal machine component form an antenna structure together. The mobile device has the advantages of small size, wide frequency band, appearance beautification and the like, and is suitable for various mobile communication devices.

The invention discloses a heating element for an ultra-high temperature field platform and a preparation method and application thereof, the heating element is a pre-reduced graphene oxide film, the length is larger than or equal to the width, the width is smaller than or equal to 10 mm, and the thickness is smaller than or equal to 200 microns. The preparation method comprises the following steps: preparing the graphene oxide film; and carrying out heat treatment on the graphene oxide film. According to the invention, the pre-reduced graphene oxide film is a heating body material which is light, ultrathin, stable in heating performance and rapid in Joule heating effect, and has the advantages of high heating rate, high temperature, accurate and adjustable temperature and the like; the ultra-high temperature field which is accurate and controllable in temperature field, high in heating rate and high in repeatability can be constructed, and the ultra-high temperature field has high use value and good application prospects. The preparation method has the advantages of being simple in process, convenient to operate, low in cost and the like, large-scale preparation can be achieved, and the method is suitable for industrial production and beneficial to application and popularization of an ultra-high temperature field platform.