31 results about "HFSS" patented technology

The invention discloses a gallium arsenide base mixing schottky diode millimeter wave and terahertz spectrum modeling method and relates to the diode modeling technical field. The gallium arsenide base mixing schottky diode millimeter wave and terahertz spectrum modeling method comprises describing the nonlinear junction characteristics of a mixing schottky diode junction through a measurement based empirical formula and namely performing the formula description on the diode junction through a thermionic emission model; establishing a three-dimensional electromagnetic model of a gallium arsenide base mixing schottky diode and obtaining an S parameter of parasitic parameters in the millimeter wave and terahertz spectrum through a commercial HFSS (High Frequency Structure Simulator); establishing a circuit level model corresponding to the gallium arsenide base mixing schottky diode in circuit simulation software such as ADS; performing comparison on the established model and the actual encapsulation testing diode S parameter, correcting the empirical formula of the diode junction and obtaining an accurate model of the gallium arsenide base mixing schottky diode in the millimeter wave and terahertz spectrum.

The invention relates to an 8mm wave dielectric loaded moment circle transition horn antenna. The antenna consists of a rectangular waveguide, a moment circle transition horn and a dielectric rod, wherein a moment circle transition section in the moment circle transition horn is in a smooth transition mode; the dielectric rod consists of a gradient taper section and a uniform cylindrical section, and is coaxial with the moment circle transition horn; the cylindrical section of the dielectric rod is extended into the moment circle transition horn mouth surface and is determined by a numerical analysis method; and the dielectric rod is made of polytetrafluoroethylene and a relative dielectric constant Epsilon r is 2. In the antenna, each parameter of the antenna is optimally designed by a finite element method of a high-frequency structure simulator (HFSS) for an electromagnetic field, so that the antenna can realize a narrow beam width under a smaller caliber, and the input standing wave ratio is high.

The invention belongs to the technical field of traveling wave tube return wave simulation, and in particular relates to a traveling wave tube return wave oscillation simulation method. The present invention obtains the high-frequency field distribution at any position in the periodic structure of the traveling wave tube through the high-frequency structure simulation software HFSS, and then combines the high-frequency field equation of the return wave, the electronic phase equation and the equation of motion to construct the equation group, and calculates through step-by-step iteration. The back-wave interaction result of the traveling wave tube is obtained; the method of the present invention can calculate the back-wave interaction in various periodic structures within a few minutes. Since the method of the present invention directly deals with the field distribution of a single period in the periodic structure, the present invention is not limited to a specific traveling wave tube, and can calculate the return waves of various periodic structures, which can be used for various The return wave calculation of traveling wave tube provides great convenience. The invention realizes both versatility and high efficiency in the research of the return wave oscillation of the traveling wave tube.

The invention discloses a method for manufacturing a microwave hybrid integrated circuit based on an Ansoft HFSS (High Frequency Structure Simulator). The method comprises the steps of: determining a source impedance and a leakage impedance: designing a prototype circuit of an input and output matching network; carrying out segmented optimization design by using the Ansoft HFSS; designing a prototype circuit of a stabilizing network; carrying out optimization design on an input part circuit; exporting simulation data of the output network and the input circuit to an ADS (Advanced Design System), electrically connecting with an active device, judging whether the circuit reaches the expected requirements including gain and stability, if yes, completing the design; and if not, carrying out fine control optimization on the circuit until reaching the requirement. On the premise of meeting full-frequency band stabilizing requirement, the invention realizes working frequency, gain and output power specified by the micro hybrid integrated circuit, and ensures that the microwave hybrid integrated circuit has better maneuverability.

The invention discloses a sectional type through hole modeling method including influence of a plane on a resonance characteristic. The type through hole modeling method comprising the seven steps of: 1, decomposing a through hole structure in a center position of each flat plate; 2, extracting capacitor and inductor parameters in all parts of equivalent circuits of a through hole; 3, building an equivalent circuit map of a top microstrip line to an upper through hole vertical conversion structure and a lower through hole to a bottom microstrip line vertical conversion structure; 4, extracting a parameter impedance of the plane to a position where the center of a circle of the through hole is; 5, adding a Zpp obtained in the step 4 to an equivalent circuit model of an intermediate vertical through hole; 6, sequentially cascading all equivalent circuits of the through hole according to the upper part, the middle part and the lower part, and respectively adding a terminal port at two ends of the final equivalent circuit; and 7, building a one-order circuit model with a through hole structure in an ADS (Application Development System), establishing a physical model of the through hole in a simulation software HFSS (High Frequency Structure Simulator), calculating an S11 parameter and an S21 parameter, and comparing the obtained result with the result in the step 6.

The method for optimizing the PCB microstrip line by adopting response surface method-genetic algorithm of the present invention comprises: establishing the electromagnetic simulation model of the PCB microstrip line based on HFSS software, obtaining the return loss and the insertion loss of the microstrip line based on the model, and With substrate thickness, microstrip line width, microstrip line thickness, and dielectric constant as design parameters, and return loss as target value, 29 sets of test calculations and simulations are designed, and the response surface method is used to analyze the return loss under the condition of 5GHZ. The relationship between its influencing factors is fitted, and the advantage of searching the global optimal solution of genetic algorithm is used to optimize the fitting function, and the combination parameters with the minimum return loss are obtained. The accuracy of the optimization results is verified by HFSS simulation simulation, and this method also has a guiding effect on the optimization design of other interconnect structures.

The invention discloses a novel dual-frequency / high-radiation-efficiency planar microwave resonant antenna, which includes a rectangular dielectric substrate, the bottom surface of which is a ground radiation patch, and a right-angled fold line symmetrical concave metal foil placed on the upper surface of the dielectric substrate. Chip feeder. Solder the inner core directly to the feeder using the SMA connector, and connect the ground radiation patch. The invention uses the electromagnetic simulation software ANSYS HFSS for simulation design, real-time simulation by changing the shape and size of the feeding antenna, and joint calculation of multi-parameter simulation data and simulation diagrams to optimize the structure, material and process of the antenna, confirm The reliability of the simulation results. Increase the effective radiation resistance of the antenna, reduce the generation of high-order modes, improve the radiation efficiency of the antenna, improve the overall effect of the antenna system, and realize the requirements of dual frequency points and high radiation efficiency on the same substrate and the same plane, and achieve dual frequency points Applications.

The invention discloses a wireless charging simulation method capable of combining MATLAB (Matrix Laboratory) software with HFSS (High Frequency Structure Simulator) software. Firstly, on the basis of a coupled-mode theory, a wireless charging model of a coil antenna is established; then, according to a circuit model theory and analysis for a resonant mode wireless charging mathematical model, the parameter of the coil antenna is determined; according to the parameter of the coil antenna and the resonant mode wireless charging mathematical model, the practical device parameter and the theoretical model parameter of the coil antenna are obtained; through the MATLAB software, the wireless charging model of the coil antenna is realized; and through the HFSS software, the wireless charging model of the coil antenna is solved, optimized and simulated, and a simulation result is output, wherein the simulation result comprises a coil antenna parameter, charging efficiency and an electromagnetic field distribution diagram. By use of the method, in virtue of he powerful numerical value calculation and modeling functions of the MATLAB, the HFSS is adopted to carry out accurate simulation on the resonant mode wireless charging mathematical model, wireless charging simulation is effectively optimized, and a foundation is laid for the market requirements of resonant mode wireless charging.

The invention discloses a passive intermodulation suppression method for a circulator used in communication, including (1) determining the frequency band of the circulator to be processed, the power index, and the expected PIM value under the power index; (2) HFSS simulation The simulation model of the circulator is established in the software, and under the power index, it is obtained in (2 f 1 - f 2 ),(2 f 2 - f 1 ) of the maximum field strengths A and B; (3) Calculate the PIM value of the simulation model according to A and B, and mark it as the simulated PIM value; (4) Compare the simulated PIM value and the expected PIM value, and use the HFSS simulation software to The structure of the simulation model is adjusted until the condition is met. The invention determines the determinant factor causing the passive intermodulation of the circulator, and proposes a method for quantitatively analyzing the passive intermodulation index of the circulator by using the determinant factor, which is also applicable to other third-order passive components based on gyromagnetic ferrite materials. Microwave passive devices that require source intermodulation suppression.

The invention discloses an optimum design method of a circular polarization triangular micro-strip antenna based on a characteristic module theory. The optimum design method includes steps of 1 obtaining the optimum side length a of a triangular patch; 2 optimally designing the gap size of the patch; and 3 optimally designing the feed position. The single feed point circular polarization triangular micro-strip antenna is simple in structure and easy to process and has satisfactory impedance and axial ratio bandwidth. The optimum design method can explain the working principle of the circular polarization triangular micro-strip antenna in the aspect of the physical concept, designs the determined antenna feed position and working frequency, and greatly improves the efficiency compared with manual antenna parameter adjustment processing by aid of High Frequency Structure Simulator (HFSS) simulation software.

A novel and useful method of visualization by detection of EM radiation being irradiated or reflected from objects in the imager's field of view using Finite Element Method (FEM) simulation software tools. The methodology provides a verification method of antenna operation from an electrical point of view since bolometer performance cannot be estimated using regular antenna parameters such as directivity, gain, impedance matching, etc. as the bolometer does not behave as an antenna but rather behaves as an absorber. An incident wave is triggered on the absorber and the absorption of the bolometer structure is estimated using commercially available Finite Element Method (FEM) software (e.g., ANSYS® HFSS software, CST MICROWAVE STUDIO®, etc.). How much of the energy is reflected is subsequently measured. The energy which is not reflected is considered to be absorbed by the absorber.