40results about How to "Improve power handling capacity" patented technology

The invention provides a high-frequency surface acoustic wave resonator and a preparation method thereof. The high-frequency surface acoustic wave resonator comprises a high-wave-velocity supporting substrate, a piezoelectric film located on the upper surface of the high-wave-velocity supporting substrate and a top electrode located on the upper surface of the piezoelectric film, wherein the wavevelocity of bulk waves propagated in the high-wave-velocity support substrate is greater than the wave velocity of target elastic waves propagated in the piezoelectric film. According to the high-frequency surface acoustic wave resonator and the preparation method thereof provided by the invention, the problem that the working frequency of an existing surface acoustic wave resonator is relativelylow is solved.

The invention provides a high-power optical fiber circulator based on cambered optical fiber end caps. The circulator at least comprises an optical fiber (11) and an end cap (12), an optical fiber (13) and an end cap (14), an optical fiber (15) and an end cap (16), a circulator core and a substrate, wherein the optical fiber (11) is connected with the end cap (12); the optical fiber (13) is connected with the end cap (14); the optical fiber (15) is connected with the end cap (16); and the circulator core is mounted on the substrate and can deviate or displace beams entering the circulator core. According to the circulator, the expanding and collimation of the beams at the cambered end caps are achieved through a principle of waveguide beam expanding and cambered auto-collimation output; the cambered end caps collect and couple signal light to enter tail fiber cores; the integrated cambered optical fiber end caps effectively improve the coupling efficiency of the beams in the circulator; and the power handling ability of the optical fiber circulator is improved.

The invention relates to a device and a method for inhibition of a second resonance mode of a vibrating diaphragm. The method is realized through a psychoacoustic phenomenon of so-called virtual pitch or fundamental tone missing, and comprises the following steps: extracting signals in a position with a frequency of resonance of an inherent low frequency, generating a harmonic wave of signals in the frequency band, and sending a harmonic signal, thereby achieving a psychological sense similar to a psychological sense to signals in the original frequency band. Simultaneously, the invention can prevent the damage to the vibrating diaphragm due to the high vibrating amplitude of the vibrating diaphragm when the signals are strong in the position with the frequency of resonance of the inherent low frequency. Since the harmonic wave of the tone is applied to substitute tones of all frequencies when the audio signal appears and no micro speaker is used, the invention enhances the power bearing capacity of the vibrating diaphragm and effectively improves the performance of the sounding device.

The invention belongs to the field of optics and provides an optical fiber acoustic optical modulator. The optical fiber acoustic optical modulator comprises an acoustic optical crystal, a first optical fiber collimator and a second optical fiber collimator, wherein the first optical fiber collimator and the second optical fiber collimator are positioned at two sides of the acoustic optical crystal, the second optical fiber collimator comprises a lens, a two-hole capillary and an outer sealing glass tube, one end, near the acoustic optical crystal, of the lens is a spherical surface, the other end of the lens is an 8-degree inclined surface, one end of the two-hole capillary is an 8-degree inclined surface, and the lens and the two-hole capillary realize the butt joint through the 8-degree inclined surface; the parallel leaned first and second optical fibers are accommodated in the two-hole capillary, the diameter of the first and second optical fibers is 0.125mm, the lens is made of N-SF11, the length of the lens is 10.49 to 10.5mm, and the curvature radius of the spherical surface is 4.94mm. The optical fiber acoustic optical modulator adopts two fiber collimators as receiving components of zero-level light and first-level light so that the zero-level light and the first-level light are precisely coupled to the first and second optical fibers. The optical fiber acoustic optical modulator has the advantages that the product length is shortened, the power bearing capability is improved, the overheating problem of the acoustic optical modulator is solved, and the product reliability is improved.

The present disclosure relates to Schottky diodes and methods of making the same. A Schottky diode includes: a substrate layer; a first structure and a second structure located on the substrate layer, wherein an isolation trench structure is between the first structure and the second structure, and the first structure includes a first body region and a second structure from the first structure. a cantilever beam extending from a body region, the second structure includes a second body region, and the second body region includes a heavily doped layer on the substrate layer and a lightly doped layer on the heavily doped layer; and a Schottky contact structure, the Schottky contact structure includes: a contact metal layer located on the lightly doped layer and connected to the end of the cantilever beam; and a passivation layer located on the lightly doped layer and surrounding the contact metal layer, wherein the heavily doped The position corresponding to the contact metal layer in the heterogeneous layer has one or more regions, and the one or more regions are in contact with the lightly doped layer and form a depletion region at the contact interface with the corresponding region of the lightly doped layer.

The invention discloses a spinel Li-based ferrite material used for a lock-type phase shifter from the x-band to the millimeter-wave band, and its composition chemical formula is Li 0.5(1‑a+b‑c‑d‑e) Zn a Mg e Ti b Cu c co d Bi n mn m Fe 0.5(5‑a‑3b‑c‑d‑e)‑m‑n‑δ o 4 , where: 0≤a≤0.4, 0≤b≤0.5, 0.002≤c≤0.006, 0.002≤d≤0.008, 0≤e≤0.5, 0.03≤m≤0.08, 0.002≤n≤0.006, δ is iron deficiency , 0.02≤δ≤0.08. The present invention uses a small amount of Cu 2+ Replace Li 0.5 Fe 2.5 o 4 Department of Li 1+ and Fe 3+ , which reduces the coercive force of the material and increases the remanence ratio of the material; adding an appropriate amount of Co 3+ , improve the power bearing capacity of the material. Realized the residual magnetic induction of microwave ferrite material B r Between 148mT and 343mT, the spin wave linewidth ΔH k 400~800A / m, coercive force H c ≤80A / m, remanence ratio R is 0.89~0.96, Curie temperature T c The temperature is 450°C to 500°C. At the same time, the material has low electromagnetic loss characteristics and can be used for high-power lock-in phase shifters from the x-band to the millimeter-wave band.

The invention discloses a surface acoustic wave filter with high power endurance, which comprises a plurality of surface acoustic wave resonators, wherein each of the surface acoustic wave resonators comprises an interdigital transducer and a reflecting grating; at least part of surface acoustic wave resonators are high-resistance surface acoustic wave resonators; two interdigital transducers are arranged in parallel for the high-resistance surface acoustic wave resonators; two reflecting gratings are shared by two interdigital transducers; an output bus bar of a first interdigital transducer is electrically connected with an input bus bar of a second interdigital transducer; the input bus bar of the first interdigital transducer and the output bus bar of the second interdigital transducer are located at the same end; and the two reflecting gratings are located outside the two interdigital transducers. Under same resistance, the high-resistance surface acoustic wave resonators have more finger pairs or shorter pore diameters, the current on each transducer finger is reduced, and the power endurance of the surface acoustic wave filter is greatly increased under the condition of unchanging the electric property of the surface acoustic wave filter.

The invention discloses an optical isolation method. Forward light is split into two polarized light components in a polarization light-splitting device at the incident end, light paths of the two polarized light components are intersected after the two polarized light components are emergent from the polarization light-splitting device at the incident end, a polarization rotator is arranged at the intersection, the two polarized light components are intersected in internal space of the polarization rotator, backward light after passing the polarization rotator deflects angularly and deflect parallelly in the polarization light-splitting device at the incident end, and the backward light is separated from the forward light paths. The invention further discloses an optical isolation device which comprises an input optical fiber, an output optical fiber, two collimating lenses, two polarization light-splitting devices and one polarization rotator. Power bearing capacity can be improved, requirements on clear aperture of the Faraday rotator are lowered, and package size of the device is reduced.

The invention discloses a strong electromagnetic pulse shield for phased array radar, which comprises more than one protective layer and support structure layers located on both sides of the protective layer; the protective layer includes a frequency selective layer, a semiconductor diode loaded on the frequency selective layer, A DC bias module connected to the radar transmitter, the DC bias module is connected to the frequency selection layer; the frequency selection layer includes an upper conductive layer, a substrate and a lower conductive layer, and the upper conductive layer includes an upper conductive layer unit; the lower conductive layer includes The lower conductive layer unit; the upper conductive layer unit includes a metal square frame, four square metal sheets are arranged in the metal square frame, and rectangular metal sheets are arranged between adjacent metal sheets; each upper conductive layer unit has 16 said Semiconductor diodes; wherein, 8 semiconductor diodes are located between the rectangular metal sheet and the square metal sheet, and 8 semiconductor diodes are located between the square metal sheet and the metal frame; the lower conductive layer unit includes a cross metal sheet. The invention can effectively protect the phased array radar.