3results about How to "Reduce electromagnetic coupling" patented technology

The utility model discloses a grounding structure, an electric connector and a connector assembly, belonging to the connector field, the grounding structure is used for grounding a contact member, and comprises a first grounding member and a second grounding member, the first grounding member is inserted in the second grounding member, the first grounding member is electrically connected with the second grounding member, and the second grounding member is electrically connected with the electric connector. And the second grounding piece and / or the first grounding piece are / is electrically connected with the grounding unit of the contact piece. According to the grounding structure, the electric connector and the connector assembly provided by the utility model, the first grounding piece and the second grounding piece are in plug-in fit to form a low-impedance conduction path and a closed shielding loop, so that stable connection and vibration impact resistance can be realized, interference current can be discharged, electromagnetic coupling and crosstalk can be reduced, and the stability and accuracy of signal transmission can be effectively guaranteed.

This invention discloses a dual-band co-aperture circularly polarized antenna, comprising a metal cavity structure and high-frequency antenna elements and low-frequency antenna elements stacked from top to bottom within the cavity. The high-frequency antenna element includes a high-frequency radiating patch layer and a high-frequency feed layer connected to an orthogonal L-shaped probe feed structure. The low-frequency antenna element includes a low-frequency radiating patch layer and an air layer. The low-frequency radiating patch layer has a second radiating patch, an orthogonal edge-coupled feed structure, and a parasitic structure. The feed positions of the two sets of feed structures are arranged orthogonally in a horizontal spatial plane, and their excitation regions do not overlap. The low-frequency radiating patch layer and the bottom surface of the cavity serve as the metal ground planes for the two sets of feed structures, respectively. This invention can significantly improve the isolation between the high-frequency and low-frequency elements of the co-aperture antenna, expand the operating bandwidth, achieve stable circularly polarized radiation, and adapt to the integrated application requirements of satellite navigation systems.

The utility model discloses a compact one-to-four power divider, which adopts a two-stage symmetrical branch circuit design, filters through parallel grounding capacitors at input ports, and optimizes input matching characteristics. The first-stage branch circuit realizes impedance matching and inhibits electromagnetic coupling between branches by using a spiral inductor, an isolation capacitor and a resistance network; the secondary branch circuit compensates ultrahigh frequency signal phase and amplitude deviation through a matched transmission line and a minimum grounding capacitor (multiple small-specification capacitors are connected in series), and the isolation degree of an output port is further improved by combining an isolation resistor. Through symmetric frequency division and impedance matching technologies, the power divider realizes balanced distribution of signal amplitude and phase within the frequency band of 6-18GHz, significantly reduces return loss and insertion loss, improves branch isolation to more than 20dB, effectively solves the crosstalk problem in a multi-channel system, and improves the performance of the multi-channel system. And the requirements of scenes such as high-frequency-band wireless communication and radar detection on low-loss, high-isolation and broadband signal distribution are met.