3results about How to "Increased frequency range" patented technology

The application discloses a kind of acquisition methods for the acoustic transfer characteristics of a through-hull piping system, which comprises the following steps: obtaining the acoustic transfer characteristics of the piping system in the frequency range of 5Hz-1st critical frequency, drawing the relationship curve, and taking the 1st peak point on the curve; determining each high-order critical frequency, calculating and obtaining the relationship between the amplitude A of the peak point in the acoustic transfer characteristics relationship curve of the piping system and the frequency f; drawing the relationship curve between the amplitude of the peak point and the frequency, and determining the peak point of each frequency band on the curve, and calculating the acoustic transfer characteristics relationship of the corresponding peak point frequency band. The beneficial effects of the present application are: based on the traditional method, the peak point-frequency relationship of the acoustic transfer characteristics curve of the through-hull piping system is given, and an acquisition method for the acoustic transfer characteristics of the through-hull piping system is proposed, which can be used for the evaluation of the acoustic transfer characteristics of the system piping in the frequency band of 5Hz-1000Hz in the preliminary design stage of the through-hull system.

A transducer structure (100) for an acoustic device comprising a piezoelectric layer (104), a pair of inter-digitated comb electrodes (108, 110), comprising a plurality of electrode means (112_1, 112_2, 112_3, 112_4, 114_1, 114_2, 114_3, 114_4) with a pitch p satisfying the Bragg condition given by p= lambda / 2, lambda being the operating acoustic wavelength of said transducer, characterized in that the inter-digitated comb electrodes (108, 110) are embedded in the piezoelectric layer (104) and the acoustic impedance of the electrode means is less than the acoustic impedance of the piezoelectric layer such that, in use, the excitation of a wave propagating mode in the volume of the electrode means is taking place and is the predominant propagating mode of the structure. The invention relates also to a acoustic wave device comprising at least one transducer structure as described above and to a method for fabricating said transducer structure. The invention relates also to the use of the frequency of the bulk wave propagating in the electrode means of said transducer structure in an acoustic wave device to generate contribution at high frequency, in particular above 3GHz.

The application provides a four-mode voltage-controlled oscillator, comprising four kernel units, one kernel unit is composed of two cores, and the whole is an eight-core structure, four different modes are generated to achieve a double-octave tuning range. The application benefits from a completely magnetically induced mode, which does not use additional capacitors, and finally realizes a high figure of merit (FoM) in the ultra-high frequency range, enhancing the frequency range of the PLL. The application is based on an eight-core four-mode wide tuning VCO structure of 8-shaped inductors, which skillfully uses the magnetic field coupling and inductance evanescent scheme to tightly couple the eight cores together, achieving super-multi-core and super-wide tuning range without losing additional area. It has a wider frequency adjustment range, smaller area and lower power consumption.