30results about How to "UWB" patented technology

The invention relates to a programmable beam forming network on the basis of an optical wavelength division multiplexing technology, which structurally comprises a wavelength division multiplexer, an electrooptic modulator, a 1*2 optical switch, a 2*2 optical switch, an optical amplifier, a circulator, a Faraday rotatormirror and an optical fiber true-time delay line. According to the invention, coherent microwave carrier signals with different phase delays can be generated, so that a function of an electric phase shifter in a conventional electric-control phase-control array radar is replaced and an aperture effect in the conventional phase-control array radar is greatly eliminated; and the programmable beam forming network has the advantages of ultra wide band, large dynamic range, programmable control and the like.

The invention discloses a broadband miniaturized dual-polarized antenna, which belongs to the technical field of communication. The broadband miniaturized dual-polarized antenna comprises four slot antennas, eight inductor wires, four downward bent metal sheets, four metallized via holes, four microstrip lines, two FR4 dielectric boards, two coaxial lines, a metal reflection board, an air bridge and a nylon column, wherein two microstrip lines are printed on the front surface of one dielectric board and are connected with the inner conductor of the coaxial line respectively, the other two microstrip lines are printed on the back surface of the other dielectric board and are connected with the outer conductor of the coaxial line respectively, and isolation through the air bridge is carriedout at the dielectric board back intersection; the tail end of the microstrip line is connected with a ground board outside the slot antenna through the metallized via hole; the four microstrip linesform two broadband differential baluns for feeding the slot antennas; the two FR4 dielectric boards are fixed through the nylon column; and the metal reflection board is placed at the lower side of the dielectric board. The working bandwidth of the antenna is effectively broadened, the size of the antenna is reduced, and high isolation and high gain stability are realized.

The invention discloses a terahertz metamaterial filter comprising: n×n identical units; each unit is composed of multi-layer polymer materials polymethacrylimide and polyimide and multi-layer metal layers, And starting from the incident direction of the terahertz wave, they are aligned and stacked repeatedly in the order of metal-polyimide-polymethacrylimide. The terahertz wave is incident on the filter to generate electromagnetic resonance, the terahertz wave at the resonant frequency is reflected and absorbed to form a stop band, and the waves of other frequencies are not hindered. The filter of the present invention mainly solves the problems of small square coefficient and narrow bandwidth in the existing filters of the same type, and has the advantages of flat top, polarization insensitivity and low cost.

The invention discloses an ultra wide band antenna based on fractal and a fractal method thereof and belongs to the technical field of wireless communication. The antenna comprises a dielectric-slab (3), as well as radiating elements (2) and a feed unit (4) which are directly connected with each other, and an earthing unit (6) in which an open slot (5) is formed. The fractal method of the radiating elements (2) comprises the steps that a, four isosceles right triangles are cut off from a square radiating sheet 2, and the side length of the right-angle side of each triangle is one third that of the square radiating sheet 2; b, 5 squares are marked off in the middle of the surplus structure after first fractal, the area of each square is one ninth that of the whole square radiating sheet (2) before fractal, an isosceles triangle is cut off from each corner of each square, and the right-angle side of each triangle is one third the side length of the square; and c, third iteration is continuously carried out on the surplus structure after secondary fractal according to the operation in the b step. The ultra wide band antenna based on fractal and the fractal method thereof have the advantages that an ultra wide band is formed, multifrequency work is realized, the directivity is good, the standing-wave ratio is small, and excellent impedance matching can be realized.

The invention discloses a continuous class F amplifier, which comprises a main channel impedance matching network, a bypass filter matching network, a main channel power amplification network, a bypass power amplification network, and two continuous class F waveform synthesis impedance matching networks. The present invention adopts the stacked amplifier based on the two-way self-bias mode as the core unit of the main road and the bypass power amplification network, combines the two-way continuous F class waveform synthesis technology and the continuous F class amplifier impedance matching technology, and directly converts the output voltage waveform of the amplifier The special continuously changing voltage waveform of the continuous class F amplifier is shaped, which avoids the impedance limitation of the output network, optimizes the impedance design space of the traditional continuous class F amplifier, and makes the circuit have the characteristics of ultra-wideband, high gain, and high power output capability.

The invention discloses an ultra-wideband differential PIFA antenna suitable for 5G communication. In the present invention, the original two independent PIFA antennas are directly connected through the ground port, and the single-port feed is changed into a dual-port differential feed, so as to provide a pair of signals with opposite polarities for the antenna, thereby generating High-frequency current with equal amplitude and reverse direction. At the same time, the continuity of the characteristic impedance of the microstrip is effectively controlled by using the method of bending the conduction band at a right angle with a 45° outer bevel, and a gradual slotting design is carried out on the radiation patch to meet the ultra-broadband characteristics. The differential mode loss in the passband of the present invention is small. After testing, it is found that the differential mode standing wave ratio of the differential antenna at 2-5.4GHz is less than 1.7, and the return loss is greater than 12dB, and the relative bandwidth is greater than 90%. In addition, the gain of the antenna in the working frequency band is greater than 5dBi, the radiation efficiency is greater than 95%, and it has properties such as ultra-wideband, high gain, high efficiency, and excellent port matching.

The invention provides a micro-coaxial transmission line based on 3D printing and a manufacturing method thereof, wherein the transmission line intermediate body (101) includes an inner conductor (201), an outer conductor (202), a support structure (203), and an outer frame cap (204 ) and the outer frame bottom plate (205), the materials of the support structure (203), the outer frame cap (204) and the outer frame bottom plate (205) are all photocurable resins; the inner surface of the outer frame bottom plate (205) is covered with an outer conductor ( 202); the support structure (203) is located above the center of the outer frame bottom plate (205), and its upper surface is covered with an inner conductor (201); the outer frame cap (204) is buckled upside down on the outer frame bottom plate (205); the transmission line end The part (102) is located at the end of the transmission line intermediate body (101), and is hollowed out relative to the top of the transmission line intermediate body (101). The micro-coaxial transmission line proposed by the present invention takes light-curing 3D printing as the core. Compared with the production of the current micro-coaxial structure, it has the advantages of convenient batch production, short production cycle, and high processing accuracy.

The invention provides a self-complementing radar antenna. The self-complementing radar antenna includes: a metal cavity with an opening on its upper end and a recessed back cavity at its lower end; an insulating dielectric plate fixed at the opening on the upper end of the metal cavity; a butterfly antenna arm made of metal material It is prepared and formed on an insulating dielectric board in a planar shape, including a first antenna arm unit and a second antenna arm unit with opposite tops and center symmetry, and the two bottom ends of the two antenna arm units extend symmetrically toward the inner side of the butterfly antenna arm, Two rectangular microstrip lines are formed; the rectangular microstrip line of the first antenna arm unit is symmetrical to the rectangular microstrip line of the second antenna arm unit on the same side, the two are separated by a second preset distance and electrically connected through a resistor . The basic unit of the self-complementary radar antenna of the present invention is composed of a symmetrical butterfly dipole and a rectangular microstrip line. The end of the rectangular microstrip line is loaded with resistance, which has the characteristics of ultra-wideband and meets the requirements of the system for detection distance and accuracy.

The invention discloses a directional dual-frequency antenna. The directional dual-frequency antenna comprises an irradiator, a microstrip Balun, a first transmission line, a second transmission line and a reflective plate, wherein the irradiator is provided with a groove, a gap and a bent part, the inner end of the gap is connected with the groove, the outer end of the gap is opened, a first edge of the bent part is connected with a first edge of the gap, and a second edge of the bent part is connected with a second edge of the gap; a first end of the first transmission line is connected with the irradiator, a second end of the first transmission line is connected with the microstrip Balun, and a first end of the second transmission line is connected with the irradiator; and the reflective plate is arranged below the irradiator, separated from the irradiator and connected with the microstrip Balun. According to the embodiment of the invention, the directional dual-frequency antenna has the advantages of ultra wide band, high gain, high front-to-back ratio, high axial cross polarization ratio, good consistency in directional diagram, small volume, simple structure, low manufacturing cost and the like, and is convenient to process.