30results about How to "Lower equivalent dielectric constant" patented technology

The invention discloses a broadband capacitive feed miniature microstrip paster antenna. A foam dielectric substrate is arranged between a microstrip dielectric substrate and an earth plate and thus the thicknesses of the dielectric substrates are increased; and an equivalent dielectric constant is reduced and a working band width of the antenna is extended. A metal short-circuit surface is loaded at an edge of one side of a radiation paster to form a standing wave structure from an open circuit to a short circuit; and the length of the antenna at the direction perpendicular to the short-circuit surface is a quarter of a wavelength. Slotting is carried out on the radiation paster and the path of an excitation current of the surface of the antenna paster is bent, thereby increasing the effective length of the antenna paster and thus reducing the resonant frequency and realizing miniaturization of the antenna at the another-dimensional dimension. Coupling and feeding are carried out by using a capacitive paster to realize good impedance matching, thereby reducing equivalent quality factors of the antenna and realizing increasing of the operating bandwidth of the antenna. According to the invention, a defect that the existing microstrip paster antenna can not consider the wide frequency band and miniaturization simultaneously can be overcome. The provided antenna has advantages of wide frequency band, low profile, small dimension, light weight, and easy processing.

The invention provides a suspended microstrip antenna array for 60GHz millimeter wave communication and an antenna thereof. The antenna array comprises antenna units and a feed network. The antenna units are arranged in an upper and lower two-row mode; the number of the antenna elements is 2*(2n), and n is a positive integer; the feed network comprises impedance transformers, coplane duel-wires, coplane waveguides and power dividers connected with the coplane duel-wires and the coplane waveguides; each antenna element is connected with one impedance transformer; the impedance transformers of the uplink antenna elements of the antenna units and the impedance transformers of the downlink antenna elements are arranged oppositely; the coplane duel-wires are connected with the antenna units via the impedance transformers; one power divider is connected at the axial central position of each coplane duel-wire; and one end of the coplane duel-wire is connected with the power divider and the other end is provided with a feed port. The suspended microstrip antenna has the advantages that the bandwidth is wide, the radiation loss is small, and integration with a plane millimeter wave circuit is easy.

The invention relates to a processing process of a lotus-root-core-shaped polytetrafluoroethylene (PTFE) insulation layer for a radio frequency cable. The process comprises the following steps: fixing a push inner mould with a push machine guide rod, fixing a push outer mould to an outer mould seat, and putting a PTFE prefabricated rod into a push machine steel barrel; enabling a silver-jacketed wire conductor to penetrate through the push machine guide rod, an inner conductor pipe and the push outer mould in sequence to be connected with a traction wire; fixing the outer mould seat with the steel barrel, starting a push machine main engine, wrapping the PTFE prefabricated rod around the inner conductor pipe and a plurality of empty pipes through the push inner mould and the outer mould, and enabling the PTFE prefabricated rod to pass through the straight pipe opening of the push outer mould to form the lotus-root-core-shaped PTFE insulation layer with the silver-jacketed wire conductor in the middle and a circle of through holes in the periphery; discharging, shaping, volatilizing an extrusion aid through a volatilizing box, sintering in a sintering furnace at the high temperature, checking through a spark machine, and dragging through a traction machine to obtain a product. The process has the characteristics that as air is in lotus root cores, the equivalent dielectric constant of the insulation layer is greatly reduced and the cable attenuation is reduced by at least 20%.

The invention discloses a microstrip period meander line slow-wave structure. A dielectric support rod of a linear structure supports the periodic microstrip meander line, the processing difficulty isreduced greatly, and the design flexibility is increased. A present meandering dielectric support rod cannot be realized without a semiconductor technology and uses a silicon substrate, and the dielectric support rod in the structure of the invention is made of a diamond material, the effective dielectric constant (5.7) of diamond is lower than that (11.5) of silicon, and the coupling impedance of the dielectric support rod of the diamond material is higher compared with that of silicon. In addition, the dielectric support rod of the linear structure directly supports the lower surface of theperiod microstrip meander line instead of embedding the meandering band-shaped dielectric support rod, so that a heat radiation problem in the microstrip period meander line slow-wave structure becomes serious, and the diamond of high thermal conductivity can be used to solve the problem.

The invention discloses a radio frequency micro-electromechanical microstrip antenna, and belongs to the technical field of wireless communication. The radio frequency micro-electromechanical microstrip antenna comprises a metal frame and a microstrip antenna unit, wherein the microstrip antenna unit comprises a first adapter plate, a second adapter plate and a third adapter plate; metal shieldingstructures surrounding the central areas of the respective adapter plates are arranged on the three adapter plates, and the vertical interconnection of the metal shielding structures among the threeadapter plates is achieved by BGA interconnection structures; a first radiation patch is arranged on the front face of the first adapter plate; an air hole and a parasitic patch are arranged on the second adapter plate; a second radiation patch is arranged on the front face of the third adapter plate, and a reflecting surface s arranged on the back surface of the third adapter plate; and a feedinghole and a grounding hole are formed in the central area of the third adapter plate. The radio frequency micro-electromechanical microstrip antenna disclosed by the invention has the characteristicsof low profile, high gain and high bandwidth, and can solve the problems of narrow bandwidth and low gain of a low-profile microstrip antenna of a semiconductor substrate with a high dielectric constant.

The invention discloses a high temperature resistance microstrip antenna. The high temperature resistance microstrip antenna comprises a patch, a dielectric substrate, a ground plate and a coaxial connector, wherein the patch, the ground plate and the coaxial connector are made of high temperature resistance metal materials, the dielectric substrate is made of a high temperature resistance non-metal material, the dielectric substrate and the ground plate are connected through the coaxial connector, an air layer is arranged between the dielectric substrate and the ground plate, the patch is inan E shape, the middle of the patch is symmetrically provided with two isosceles trapezoid grooves, the patch is arranged on the outer surface of the dielectric substrate, a signal is fed into a highfrequency current through a feed port of the coaxial connector, the high frequency current reaches the patch through the coaxial connector, the high frequency current is converted by the patch into electromagnetic waves radiating out to the space. The antenna is advantaged in that stable and reliable work in the high temperature environment above 400 DEG C or even 1500 DEG C can be realized, and electric performance index requirements are satisfied.

The invention discloses a broadband series-feed sparse array antenna unit, which comprises an antenna feed part and an antenna radiation part, wherein the antenna feed part comprises an SMP structure, a strip line matching adjustment and phase adjustment part and metalized isolation columns around a strip line. The antenna radiation part comprises a dielectric layer of the antenna, a radiation patch of the antenna, a parasitic patch and a metallization isolation column. A radio frequency signal is fed into a strip line in the antenna feed layer structure through the SMP structure, the strip line is subjected to one-to-two power distribution, the amplitude is equal, the phase difference is 180 degrees, the radio frequency signal is coupled to an antenna patch in the antenna radiation layer structure through a linear gap in the upper layer ground of the strip line and an air cavity, and radiation of radio frequency energy is achieved. The average distance of the plurality of antenna units is greater than half wavelength of the antenna under the working frequency, and the layout of the antenna patch adopts a comprehensive algorithm of an antenna pattern, so that lobe deletion of the antenna can be prevented, the gain of the antenna can be improved, and the side lobes of the antenna can be reduced.

The invention relates to an insulator, which comprises an insulator body, wherein a through hole is formed in a central axis of the body; a plurality of first holes and a plurality of second holes arealso formed in the body and are arranged around the through hole; the first holes are sector ring holes; and the second holes are circular holes. The invention further provides a connector of using the insulator. According to the insulator provided by the invention, by adopting the structural style of hollowing out most of insulating material of the insulator, the volume ratio of air to the insulating material in the insulator is greatly improved, signal reflection is reduced and the equivalent dielectric constant of the insulator is significantly reduced; the cut-off frequency is inversely proportional to the equivalent dielectric constant, so that the cut-off frequency of a high-frequency connector of using the insulator is relatively easily improved to 40GHz and the working frequency of the high-frequency connector is also improved.

The invention discloses an integrated AIP assembly, a terminal device and a terminal device shell, the integrated AIP assembly comprises metamaterial structures and an AIP assembly body, and the metamaterial structures are arranged above the AIP assembly body at intervals; the metamaterial structures adopt a metal structure layer, and the metal structure layer is arranged on the surface of the device shell and is arranged close to one side of the AIP assembly body; the equivalent dielectric constant of the device shell provided with the metal structure layer is matched with the dielectric constant of vacuum; the metamaterial structures are arranged above the AIP assembly body at intervals, the electromagnetic metamaterial theory is utilized, the equivalent dielectric constant of the deviceshell is reduced, it is ensured that the performance of the AIP assembly body in the device equipment is close to the performance of the AIP assembly body in a free space, and the effects of performance compensation of the AIP assembly body and approximate transparency of antenna radiation are achieved; the matching performance of the antenna in a working frequency band and the normal gain of theantenna in a free space are effectively recovered, the scanning angle of the antenna is improved, the universality of the integrated AIP assembly is effectively improved, and the design and manufacturing process is simple.

The present invention discloses an artificial magnetic conductor unit, an artificial magnetic conductor structure and a planar antenna. The artificial magnetic conductor unit comprises a metal periodic patch, a metal via hole, a metal ground plate and a dielectric substrate, wherein the metal periodic patch consists of a square patch with a hollowed center and a spiral line, the spiral line is arranged at the hollowed center part of the square patch and is connected with the square patch, the spiral line is connected with the metal ground plate through the metal via hole, and the metal periodic patch is etched on the dielectric substrate. The artificial magnetic conductor structure comprises the plurality of artificial magnetic conductor units which are distributed periodically, and the planar antenna comprises an antenna oscillator and the artificial magnetic conductor structure arranged below the antenna oscillator. As the artificial magnetic conductor structure is used as a planar base station antenna reflecting plate, the height of the antenna can be reduced to 1/3 of the original height of the antenna, and the artificial magnetic conductor structure is simultaneously adapted to a plurality of polarized antennas, thus wide application range is achieved.

Along with the arrival of the 5G communication era. The application of a terminal MIMO (Multiple Input Multiple Output) antenna is gradually popularized; as an excellent integration platform, the FPC(flexible circuit board) can integrate a plurality of radio frequency signal transmission lines on one FPC at the same time, and compared with a traditional mode that a plurality of flexible coaxial cables need to be adopted to carry out signal feed-in on the MIMO antenna, the space is greatly saved. However, an existing FPC transmission line is limited by inherent loss characteristics of the basematerial and the copper foil, the radio frequency transmission performance of the existing FPC transmission line is difficult to further improve, and great challenges are brought to design optimization of radio frequency and antenna engineers. According to the invention, the latticed hollowing design is carried out on the insulating base material and the glue around the signal line, so that the equivalent dielectric constant and loss of the material through which the signal transmission line passes are reduced, the performance of the transmission line is improved, and the loss of the transmission line is reduced under the condition of the same FPC thickness, or the FPC thickness is reduced under the condition of the same loss.

The invention provides a zero-order resonant antenna and a wireless router suitable for the communication field. The zero-order resonant antenna comprises a substrate, a left and right hand composite transmission line unit attached to the front side of the substrate, an electromagnetic band gap (EBG) structure attached to the bottom of the substrate, and a metal flat plate positioned at one side of the EBG structure, connected with the left and right hand composite transmission line unit and used as the ground. The zero-order resonant antenna of low profile, horizontal omnibearing radiation, high efficiency and large bandwidth and polarized vertical to the horizontal plane is realized.