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

The invention discloses a microstrip periodic zigzag slow wave structure, which adopts a straight-line structure dielectric support rod to support the periodic microstrip zigzag line, thus greatly reducing processing difficulty and increasing design flexibility. At the same time, the dielectric support rod is made of diamond material, which can only be realized by semiconductor technology compared with the existing meandering strip dielectric support rod, and the material used is silicon as the substrate, and the equivalent dielectric constant can be smaller (silicon’s The dielectric constant is 11.5, compared to 5.7 for diamond), and the coupling impedance is higher in comparison. In addition, changing the embedded zigzag strip-shaped dielectric support rod into a straight-line structure dielectric support rod directly supports the lower surface of the periodic microstrip zigzag line, which will make the internal heat dissipation problem of the zigzagging slow wave structure of the microstrip more serious. However, since the diamond used in the present invention has good thermal conductivity, this problem is well taken into account.

The invention discloses a miniaturized low-profile wide-band dual circularly polarized microstrip antenna. The antenna is composed of a first dielectric substrate, a metal support frame, a second dielectric substrate and a third dielectric substrate. There are parasitic metal patches on the upper and lower surfaces of the first dielectric substrate, and the size of the patch on the upper surface is larger than that of the patch on the lower surface, and the two are connected through 4 metallized through holes; there is a feed patch on the upper surface of the second dielectric substrate; Tri-dielectric substrate includes 4 striplines, 90° bridge, 2 feed probes and 2 RF coaxial connectors. The present invention adopts 90° electric bridge and double feed point technology to realize dual circular polarization, comprehensively adopts laminated structure and double parasitic patch structure connected by metallized through holes to widen the bandwidth of microstrip antenna, so that the antenna bandwidth can reach 19.4%, and The ratio of the circular polarization axis in the frequency band is less than 1.3dB; it has the characteristics of miniaturization and low profile, and the volume is 0.45λ0×0.45λ0×0.075λ0.

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 provides a high-performance precision microwave adapter which comprises a shell, an insulator, an outer conductor with an axial through hole, four insulated pieces, a pin and a thread sleeve, wherein the pin comprises a front-end connector, a fixed section, a connecting section and a rear-end connector in sequence from front to rear in the axial direction; the fixed section is sleeved with the insulator and the inner wall of the insulator is in close fit with the fixed section; the insulator is nested in the shell and the outer wall of the insulator is in close fit with the inner wall of the front end of the shell. The high-performance precision microwave adapter is novel in structure, small in size, light in weight and wide in frequency band; supporting materials are reduced as far as possible on the basis of ensuring sufficient mechanical strength to obtain relatively small effective dielectric constant so as to extend the working frequency range of broadband microwave communication equipment; in addition, the high-performance precision microwave adapter is good in electrical appliance performance and has relatively good market prospect.

The invention provides a high-bandwidth organic substrate antenna structure and a manufacturing method. The high-bandwidth organic substrate antenna structure comprises an upper organic substrate layer and a lower organic substrate layer, wherein the upper organic substrate layer comprises a first inner core plate, and a first copper layer and a second copper layer which are laminated on the upper and lower surfaces of the first inner core plate through a first PP layer and a second PP layer respectively; a microstrip antenna structure is etched in the upper organic substrate layer through the first copper layer; a feeder line, which runs through the upper organic substrate layer, is arranged in the upper organic substrate layer; one end of the feeder line is connected with the microstrip antenna structure; a hollow cavity structure is arranged on the other surface, deviating from the microstrip antenna structure, of the upper organic substrate layer; the lower organic substrate layer comprises a second inner core plate, a third PP layer on the upper surface of the second inner core plate, and a fourth copper layer which is laminated on the lower surface of the second inner core plate through a fourth PP layer; a phase connecting end, which is corresponding to the position of the feeder line in the upper organic substrate layer, is arranged in the lower organic substrate layer; and a third through hole is also formed in the high-bandwidth organic substrate antenna structure for forming a ventilating structure. By adoption of the high-bandwidth organic substrate antenna structure, the bandwidth of the microstrip antenna can be improved, and the cost is low.

The present invention provides a suspended microstrip antenna array and its antenna for 60GHz millimeter wave communication, including an antenna unit and a feeding network, the antenna units are arranged in two rows up and down, and the number of antenna array elements is 2×( 2n), where n is a positive integer; the feed network includes an impedance converter, a coplanar pair of wires, a coplanar waveguide, and a power divider connecting the coplanar pair of wires and the coplanar waveguide; wherein, each antenna element Connect a described impedance converter, the impedance converter of the antenna array element uplink of the antenna unit and the impedance converter of the antenna array element of the downlink are arranged relatively; The twin wires are connected to the power splitter at the central position in the axial direction; one end of the coplanar waveguide is connected to the power splitter, and the other end is configured with a feed port. The suspended microstrip antenna of the present invention has wider bandwidth, less radiation loss, and is easy to integrate with planar millimeter wave circuits.