13 results about "Radiation bandwidth" patented technology

The invention provides a miniaturized broadband non-reflection filtering antenna and communication equipment, and relates to the field of communication antennas. The antenna comprises a hybrid coupling resonance system and a matched absorption network, wherein the hybrid coupling resonance system comprises a main radiation groove which is formed in a metal floor and is of a split ring structure, and two parasitic radiation grooves which are of a U-shaped structure and are located on the two sides of the main radiation groove respectively; the matching absorption network comprises an absorption resistor connected with the feed microstrip line in parallel and an absorption microstrip line connected with the absorption resistor in series. According to the embodiment of the invention, the absorption circuit is integrated on the structure, so that the antenna has the non-reflection characteristic in the range of 1.27-2.31 GHz far beyond the radiation bandwidth, the defect that the radio frequency front-end performance is deteriorated due to in-band reflection and out-of-band energy reflection back to a transmitting channel of a traditional antenna is effectively overcome, and the electromagnetic compatibility and the linear characteristic of the whole system are remarkably improved.

Disclosed in the present application are an antenna assembly, a dual-frequency wideband antenna, and an electronic device. The antenna assembly provided in the embodiments of the present application has a ground point arranged at a position in the middle of an antenna radiator, and the use of a single feed allows the antenna radiator to support a first frequency band and a second frequency band which are different from each other, such that dual-frequency radiation is realized, and the working bandwidth of an antenna is effectively expanded, that is, the radiation bandwidth is increased, thereby improving the efficiency of the antenna.

The utility model provides a high gain antenna and a terminal device, the high gain antenna comprises a substrate and a radiation antenna attached to the substrate, the radiation antenna is bent and arranged on a first surface and a second surface of the substrate, and the first surface and the second surface are oppositely arranged; a concave groove is formed in the first surface, and the bottom of the concave groove extends to the bent part of the radiating antenna; the radiating antenna is provided with at least one group of gaps, namely a first gap and a second gap, and a radiating part between the group of gaps is attached to the interior of the recessed groove. The high-gain antenna not only can enlarge the radiation area of the whole antenna, but also can improve the radiation gain and the radiation bandwidth through the self-coupling of the radiation antenna on the upper surface and the lower surface of the substrate.

The application provides a miniaturized broadband non-reflection filtering antenna and communication equipment, and relates to the field of communication antennas. The antenna comprises a hybrid coupling resonance system and a matching absorption network, wherein the hybrid coupling resonance system comprises a main radiation slot of an open loop structure provided on a metal ground plate, and two parasitic radiation slots of a U-shaped structure respectively located on both sides of the main radiation slot; the matching absorption network comprises an absorption resistor connected in parallel with a feeding microstrip line, and an absorption microstrip line connected in series with the absorption resistor. According to the application, the absorption circuit is integrated on the structure, so that the antenna presents the non-reflection characteristic in the range of 1.27-2.31 GHz which is far beyond the radiation bandwidth of the antenna, the defects of the traditional antenna, such as the in-band reflection and the out-of-band energy reflection back to the transmission channel to deteriorate the performance of the radio frequency front end, are effectively solved, and the electromagnetic compatibility performance and the linearity of the system as a whole are significantly improved.

The embodiment of the present application provides a ceiling antenna, comprising: a reflector; a support plate, fixed together with the reflector, the plane where the support plate is located is perpendicular to the plane where the reflector is located; a radiation array, attached to the support plate; wherein the radiation array comprises a substrate, a first radiator, a second radiator and a third radiator located on the substrate; two second radiators are respectively located on both sides of the first radiator, and the first radiator and the two second radiators are electrically connected together through the third radiator; a ground plate, attached to the support plate, located between the reflector and the radiation array, and insulated from the reflector; a connector, fixed to the support plate, located on a side of the ground plate away from the reflector, and electrically connected to a side of the third radiator close to the reflector; wherein the first radiator, the second radiator and the third radiator are all grid linear structures. The ceiling antenna has a wide radiation bandwidth, good omnidirectional radiation, and has the characteristics of high concealment and beauty.

The utility model provides a full-band antenna and a mobile terminal, the full-band antenna comprises a first radiation unit, a second radiation unit, a grounding point, a first feed point and a second feed point, the first radiation unit and the second radiation unit are both electrically connected with the grounding point, a first feed band and the second feed point, the first radiation unit and the second radiation unit are connected through a connecting piece, one end of the connecting piece is connected with the first radiation unit, the other end of the connecting piece is connected with the second radiation unit, and a gap area is formed between the first radiation unit and the second radiation unit. The full-band antenna provided by the utility model not only can effectively improve the overall radiation efficiency of the antenna, but also can widen the overall radiation bandwidth of the antenna.

The invention relates to the technical field of antennas, in particular to a mining miniaturized broadband bidirectional antenna, which comprises a dielectric substrate, a first metal layer and a second metal layer, and is characterized in that the first metal layer and the second metal layer are respectively arranged on two opposite surfaces of the dielectric substrate; the first metal layer comprises four microstrip balun structures and a T-shaped power division network, and the four microstrip balun structures are connected through the T-shaped power division network; the second metal layer comprises four radiation branches and a metal ground layer, and the four radiation branches are connected through the metal ground layer; each microstrip balun structure is in one-to-one correspondence with the radiation branch knot, each microstrip balun structure is arranged opposite to the corresponding radiation branch knot, and the power division network is arranged opposite to the metal ground layer. The mining miniaturized broadband bidirectional antenna is compact in antenna structure, small in array element spacing, large in impedance and radiation bandwidth, good in radiation stability, simple to process and manufacture and low in cost.

Embodiments of the present application provide an antenna structure and an electronic device. The antenna structure comprises a radiator, a second radiator, a transmission line, a feed point and a ground point. The first end of the transmission line is electrically connected with the feed point, the second end of the transmission line is electrically connected with the first radiator and the second radiator respectively, and the first radiator is electrically connected with the ground point. The impedance of the first radiator in a first state and the impedance of the second radiator in a second state are conjugate. The first state is that the transmission line delivers electromagnetic energy to the first radiator alone, and the second state is that the transmission line delivers electromagnetic energy to the second radiator alone. When the transmission line feeds the first radiator and the second radiator at the same time, the load impedance of the first radiator and the second radiator can be adapted to each other, the modes of the first radiator and the second radiator can be fused with each other, the radiation bandwidth of the electromagnetic wave signal can be effectively increased, the radiation intensity of the antenna structure in a wide frequency band can be effectively increased, and the reliability of the communication of the electronic device can be improved.

The invention discloses a high aperture efficiency cross grid antenna and a bandwidth improving method thereof, and the cross grid antenna optimizes the current branch layout, and employs a cross configuration mode to adjust the reverse current while maintaining the same-direction radiation of the same-direction current branch part, thereby improving the bandwidth of the antenna. And the reverse current branches are introduced into the lower substrate through the metal through holes and are arranged in a staggered manner, so that the reverse current radiation is effectively counteracted, and the gain of the antenna unit is remarkably improved. Besides, on the basis of an original single-branch radiation structure, an expansion branch is added, and the length of the expansion branch is close to that of an original branch, so that a resonance point is formed in a range close to the original working frequency, and the working bandwidth of the antenna is effectively expanded. Compared with the condition that the expansion branches are not added, the working bandwidth of the antenna is improved by 9.79% after the expansion branches are added. According to the invention, the design of the broadband 28GHz frequency band cross grid antenna is realized, and the radiation bandwidth and the gain bandwidth of the antenna can be further improved on the basis of satisfying high aperture efficiency.

A method for improving a lithographic process of imaging a portion of a design layout onto a substrate using a lithographic apparatus. The method includes computing a multi-variable cost function that is a function of: (i) a plurality of design variables that affect characteristics of the lithographic process and (ii) a radiation bandwidth of a radiation source of the lithographic apparatus; and reconfiguring one or more of the characteristics (e.g., EPE, image contrast, resist, etc.) of the lithographic process by adjusting one or more of the design variables (e.g., source, mask layout, bandwidth, etc.) until a termination condition is satisfied. The termination condition includes a speckle characteristic (e.g., a speckle contrast) maintained within a speckle specification associated with the radiation source and also maintaining an image contrast associated with the lithographic process within a desired range. The speckle characteristic being a function of the radiation bandwidth.

The invention discloses an ultra-wideband omnidirectional Vivaldi antenna array and a feed power divider thereof, and belongs to the technical field of antennas. The antenna array comprises a ground plane, an F4B dielectric plate, a feed network and twelve Vivaldi antenna units which are annularly arranged in a central symmetry mode, each antenna unit comprises a gradually-changed open slot and a three-ellipse combined resonant cavity, and the curve change rate r of an edge arc line of the gradually-changed open slot is optimized to be 0.13; the feed power divider is of a one-to-twelve-path equal-amplitude in-phase structure and is formed by combining a one-to-three-path power divider and a one-to-four-path power divider, the narrowest position of a microstrip line is 0.6 mm, and the relative bandwidth is 133.61%. By optimizing the antenna unit structure and the design of the power divider, the omnidirectional radiation bandwidth of 2.0-9.8 GHz is realized under the condition of only using 12 units, the horizontal plane gain fluctuation is less than 0.8 dB, and the transverse size is only 0.43 lambda, so that the problems of narrow bandwidth, large gain fluctuation, difficult processing of the power divider and large size in the prior art are solved, and the antenna is suitable for miniaturized ultra-wideband communication equipment.

The invention discloses a double-sided weak coupling antenna, and the antenna comprises a substrate which comprises a front surface and a back surface; the main antenna comprises a metal area arranged on the front surface of the substrate, and the front surface of the substrate is divided into a non-metal gap area; the independent radiation unit is a metal area arranged on the back face of the substrate, the projection of the independent radiation unit on the front face of the substrate is located in the non-metal gap area, and the independent radiation unit and the main antenna are not overlapped. According to the invention, a cooperative weak coupling mechanism is adopted, the electric field and magnetic field cooperative weak coupling mechanism is utilized, bandwidth expansion and efficiency optimization are realized under the limitation of an extremely small PCB size, the radiation bandwidth is remarkably improved, the radiation efficiency is remarkably improved, the space of the PCB is fully utilized, and the total area of the antenna is reduced.

The utility model provides a high-efficiency terminal antenna and a mobile terminal. The high-efficiency terminal antenna comprises a feeding point, a grounding point, a first radiation branch knot, a second radiation branch knot, a third radiation branch knot and a fourth radiation branch knot, wherein the first radiation branch knot is electrically connected with the feeding point, and the second radiation branch knot, the third radiation branch knot and the fourth radiation branch knot are electrically connected with the grounding point. The third radiation branch knot is connected with the first radiation branch knot, and the fourth radiation branch knot is connected with the third radiation branch knot; a first gap is arranged between the first radiation branch knot and the second radiation branch knot, and a second gap is arranged between the fourth radiation branch knot and the first radiation branch knot. The high-efficiency terminal antenna not only can effectively improve the radiation bandwidth of the antenna so as to improve the overall radiation efficiency of the antenna, but also can broaden the radiation frequency band of the antenna.