4results about How to "Good decoupling effect" patented technology

The present invention proposes a decoupling capacitor optimization selection method and system, which does not need to be adjusted according to the simulation results each time, but directly selects all decoupling capacitors quantitatively according to the optimization selection strategy, directly achieves the optimization target in the selection process, and does not need to be optimized after selection. The overall calculation amount is small and easy to quantify; combined with the frequency domain characteristics of the PDN impedance curve, the corresponding decoupling capacitors are quantitatively selected through analysis and calculation, and the decoupling capacitor parameters and the layout rules and position distribution of the capacitors on the PCB board are determined by simulating and analyzing the resonant characteristics of the circuit board, so as to achieve the ideal decoupling effect with a small number of capacitors. The optimization selection method of the present invention can quantitatively select decoupling capacitors according to the PDN impedance characteristics, control the number of decoupling capacitors within the minimum range, and achieve the ideal decoupling effect. At the same time, the layout on the board is optimized, the influence of the distribution parameters on the PDN performance is reduced, and the circuit board space and engineering costs are saved.

The application discloses a circularly-polarized self-decoupling stacked microstrip patch antenna with wide axial ratio bandwidth, which is a layered structure and comprises first and second parallelly arranged dielectric substrates, wherein an air layer is arranged between the first and second dielectric substrates, a rectangular parasitic metal patch is arranged on the upper surface of the first dielectric substrate, and each rectangular parasitic metal patch is connected with a continuously bent metal stub; a rectangular driving metal patch is arranged on the upper surface of the second dielectric substrate, and a metal ground is arranged on the lower surface of the second dielectric substrate. The application can realize wide axial ratio bandwidth and circularly-polarized self-decoupling of the stacked microstrip patch antenna without additional decoupling structure or circuit, and has the characteristics of simple structure, wide axial ratio bandwidth, self-decoupling, multi-antenna expansion, easy integration and the like, and is suitable for satellite communication, global positioning system and mobile communication and the like.

The utility model provides magnetic resonance equipment and a radio frequency coil assembly and a radio frequency coil thereof. The radio frequency coil assembly comprises a coil main body part and a preset jumper part, the preset jumper wire part is used for placing a plurality of preset jumper wires; the coil main body part comprises a PCB, the PCB is provided with a first coil unit and a second coil unit which are overlapped, and the first coil unit and the second coil unit form a first overlapping part at the overlapping part; at least one of the first coil unit and the second coil unit is provided with a first jumper welding part; the first jumper wire welding part is provided with a first adjusting part extending in the first direction, and the first jumper wire can adjust the position where the first jumper wire and the first jumper wire welding part are welded on the first adjusting part in the first direction so as to adjust the overlapping area of the first overlapping part. According to the radio frequency coil assembly, engineering and standardization in the coil decoupling process can be achieved, the manufacturing difficulty is lowered, and the reliability and consistency of the coil are improved.

This application discloses a planar inverted F antenna pair and an electronic device, and relates to the field of antenna technologies. The planar inverted F antenna pair includes a dielectric substrate, a ground metal plane, and a radiation unit, where the ground metal plane is arranged on a side of the dielectric substrate, two ends of the radiation unit are respectively connected to a first feed portion and a second feed portion, the radiation unit is connected to the ground metal plane through a ground metal sheet, the ground metal sheet is located between the first feed portion and the second feed portion, distances from the first feed portion and the second feed portion to the ground metal sheet are not equal, the ground metal plane is provided with a slot, and two ends of the slot are located on two sides of the ground metal sheet. The planar inverted F antenna pair has a compact structure, and broadband decoupling between the antennas can be realized through a simple structure without addition of a complex decoupling structure and an optimization process or introduction of additional loss.