37 results about "Slotted line" patented technology

The antenna of said transmitter is a microstrip antenna. A rear edge of its patch is provided with a short circuit by means of which a quarter-wave primary resonance can be excited by a coplanar line formed by two coupling slots in an area. Separator slots separate said area from another area in which a secondary resonance can be established at twice the frequency of the primary resonance from a slotted line extending one slot of the coplanar line. The invention applies in particular to the production of a dual-mode mobile telephone to the GSM and DCS standards.

The present invention relates to a device for receiving and / or transmitting signals comprising an assembly of n means for receiving and / or transmitting waves with longitudinal radiation of the printed slot-antenna type, where n is an integer greater than or equal to one, and an excitation means of the microstrip-line type coupled to at least one slot line. The present invention is characterized in that it comprises a switching device which acts by controlling the coupling between the microstrip line and at least one slot line.

The invention discloses low-profile semiconductor package comprising at least a first stacking semiconductor circuit small piece and a second stacking semiconductor circuit small piece which are arranged on a substrate, wherein the first semiconductor circuit small piece can be electrically coupled to the substrate by a plurality of sutures in a forward pillow joint technology, the second semiconductor circuit small piece can be electrically coupled to the first semiconductor circuit small piece by a second group of sutures which are jointed between circuit small piece joint pads of the first semiconductor circuit small piece and the second semiconductor circuit small piece, each suture of the second group of sutures comprises a suture ball, the front end of the suture ball is connected to the joint pad of the second semiconductor circuit small piece, and the tail end of each suture of the second group of sutures can be directly connected to the front end of the suture of a first group of sutures in a wedge shape.

The invention discloses an antenna for generating radially propagating radio frequency OAM beams based on a circular traveling wave antenna. The overall structure of the present invention is a metal annular cavity with a ring gap on the side. The metal annular cavity is formed by bending a rectangular waveguide. The width of the metal annular cavity is the wide side of the rectangular waveguide, and the height of the side is the narrow side of the rectangular waveguide. The seam is set in the middle of the narrow side, the perimeter of the metal ring cavity is the longitudinal length of the rectangular waveguide, and the side wall of the metal ring cavity is provided with a ring horn, which is composed of two parts that are symmetrical up and down, and when combined, the ring horn There is a suture at the bottom of the horn, and the gap corresponds to the ring gap in the middle of the narrow side of the annular metal cavity. Combining the rectangular waveguide resonant cavity and the annular traveling wave antenna structure, the invention designs an antenna structure capable of generating radio frequency orbital angular momentum beams capable of radial transmission. The invention can increase the channel capacity of the direct channel, increase the transmission distance, thereby improving the transmission efficiency of the communication system.

The invention discloses a foldable minimally-invasive artificial retina microelectrode array. The array comprises a foldable soft substrate, wherein a first connecting terminal array area and a second connecting terminal array area are arranged at the two ends of the soft substrate respectively, the first connecting terminal array area is composed of first connecting terminals, the second connecting terminal array area is composed of second connecting terminals, an exciting electrode array area is arranged on the soft substrate and composed of exciting electrodes, the first connecting terminal array area is connected with the exciting electrode array area through a flat cable, the second connecting terminal array area is connected with the exciting electrode array area through a flat cable, suture holes are formed in the edge of the soft substrate, and the exciting electrode array area is of a semispherical structure. The foldable minimally-invasive artificial retina microelectrode array can make good contact with the macular area of the retina, the exciting effect is better, the array is foldable so that the array can be embedded into one eye through a small incision, the wound is small, the array can be conveniently embedded in, wound inflammation can be reduced through contained drugs, and the treatment effect is improved.

The invention discloses a double-mode balance filter based on a micro-strip slotted line structure. The double-mode balance filter based on the micro-strip slotted line structure comprises a first filter and a second filter, wherein the first filter and the second filter are equal in size and symmetrical to each other. The first filter and the second filter respectively comprises a micro-strip line structure located on the upper layer of a dielectric substrate and a slotted line structure located on the lower layer of the dielectric substrate, wherein the micro-strip line structure of the first filter comprises a first feeder line, a second feeder line, a first harmonic oscillator and a second harmonic oscillator, and the slotted line structure of the first filter comprises a first slotted line and a second slotted line. The micro-strip line structure of the second filter comprises a third feeder line, a fourth feeder line, a third harmonic oscillator and a fourth harmonic oscillator, and the slotted line structure of the second filter comprises a third slotted line and a fourth slotted line. A bending structure is adopted by the first harmonic oscillator, the second harmonic oscillator, the third harmonic oscillator and the fourth harmonic oscillator, a part of each harmonic oscillator is located on the upper layer of the dielectric substrate, and the other part of each harmonic oscillator is located on the lower layer of the dielectric substrate. The double-mode balance filter based on the micro-strip slotted line structure has the advantages of being wide in frequency band and high in common-mode rejection, is simple in circuit structure and easy to manufacture, and has high practicability.

The invention discloses a compact micro-strip balance filter based on slotted line structures. The compact micro-strip balance filter based on the slotted line structures comprises a first filter and a second filter, wherein the first filter and the second filter are formed on a dielectric substrate The first filter and the second filter respectively comprise a micro-strip line structure located on the upper layer of the dielectric substrate and a slotted line located on the lower layer of the dielectric substrate. The first filter and the second filter are the same in structure and are symmetric mutually. The slotted line of the first filter is integrally connected with the slotted line of the second filter. The compact micro-strip balance filter has a very wide difference mode signal passband which internally has the very high common-mode rejection characteristic, a circuit is simple, and machining is easy.

The invention relates to an online cleaning device and an online cleaning method for a trench type liquid distributor in the petrochemical engineering field. The cleaning device is arranged above the trench type liquid distributor and comprises main flushing pipes (3) and flushing branch pipes (4), wherein one ends of the main flushing pipes (3) are connected with pipe nozzles (2) arranged on the tower wall, and the other ends of the main flushing pipes (3) are fixedly connected with the tower wall; secondary distributing trenches (6) of the trench type liquid distributor are suspended on the main flushing pipes (3); one ends of the flushing branch pipes (4) are communicated with the main flushing pipes (3), and the other ends of the flushing branch pipes (4) stretch into the bottoms of the secondary distributing trenches (6). Flushing fluid enters the main flushing pipes (3) through the pipe nozzles, then enters the flushing branch pipes (4) and is finally sprayed out so as to flush the secondary distributing trenches (6). According to the device and the method, sediments produced by the trench type liquid distributor in use can be effectively cleaned, and the liquid distributing effect of the trench type liquid distributor can be improved, the production period of the device is prolonged and the good application prospect is achieved.

The invention provides a high isolation slot line duplexer applied to an ultra-wideband channel and a narrow-band channel. The high isolation slot line duplexer comprises a first filter and a second filter, wherein the first filter and the second filter share a dielectric substrate and has a slotted line structure and a microstrip line structure; the slotted line structure is positioned on the lower layer of the dielectric substrate, and the microstrip line structure is positioned on the upper layer of the dielectric substrate; the bandwidth of the first filter is controlled through coupling among a U-shaped slotted line resonator, a first open stub and a second open stub, and can be controlled by adjusting intervals g1 among the U-shaped slotted line resonator, the first open stub and the second open stub; and the mode of resonance of the second filter can be controlled by loading the length of the stubs, accordingly the bandwidth of the second filter can be adjusted by adjusting the size of l5. According to the high isolation slot line duplexer, the bandwidths of the two filters can be adjusted independently; and the high isolation slot line duplexer is compact in structure, simple in circuit and high in frequency selectivity.

The invention discloses an ultra wide band balance filter based on a slotted line structure. The ultra wide band balance filter comprises a first filter and a second filter, wherein the first filter and the second filter are the same in structure, symmetrical to each other and connected on a symmetry plane. The first filter comprises a microstrip line structure and the slotted line structure. The slotted line structure comprises 2N+1 slotted line resonators of linear structures, the length of the 2N+1 slotted line resonators is half of the corresponding wave length of the center frequency of the balance filter, and the 2N+1 slotted line resonators are evenly ranked at equal distances on a first straight line and a second straight line, wherein N is a natural number larger than one. The first straight line comprises the N slotted line resonators, the second straight line comprises the N+1 slotted line resonators, centers of the N slotted line resonators on the first straight line are arranged on spaced central axes between the N+1 slotted line resonators on the second straight line respectively, the 2N+1 slotted line resonators are coupled with one another, and the 2N+1 slotted line resonators and the microstrip line structure form N+2 order filters. The balance filter has the advantages of ultra wide bands, high common-mode rejection, the simple structure and the like.

The invention relates to a construction method of a two-wall sandwiched plastic film for sandy soil dike foundation seepage cutoff. A sandy soil dike foundation seepage cutoff curtain at least built by an anti-seepage slot (1), the plastic film (2), backfill clay (3), an upstream side stirring pile unit wall (4), a downstream side stirring pile seepage cutoff wall (5) and lap-joint stirring pile seepage cutoff walls (6) on the two sides is closed. The construction method is characterized by comprising the following specific steps that first, a vertical laying plastic slotted line is determined; second, vertical laying plastic construction is conducted; third, stirring pile construction is conducted; and fourth, the upstream side stirring pile unit wall (4) and the downstream side stirringpile seepage cutoff wall (5) are closed and connected in a lapped mode. The problem of lap-joint treatment of a vertical laying plastic seepage cutoff curtain and a deep-layer stirring pile seepage cutoff curtain can be solved, so that a more economical and practical combined seepage cutoff curtain is formed. The construction method has the remarkable application benefits and very wide market promotion prospects.