63 results about "Parasitic structure" patented technology

A compliant interface (14,16) for vehicular seat weight sensors minimizes parasitic stresses affecting sensor output. In one embodiment, an integral compliant interface (14) has an annular flange (14a) attached to a post extending from the sensor body with a first compliant member (14r) disposed between the annular flange and an upper elongated flange (14h) of a mounting bracket (14l) and a second compliant member (14s) disposed between the annular plate and a lower elongated flange (14k) to allow pivotal movement of the sensor limited by a motion stop member (14f) of annular flange (14b) engaging the lower flange. An overload cage (14u) may be placed over the sensor and attached to an additional flange (14l) to contain the sensor in the event of a failure of the mount in a catastrophic high speed crash. According to another preferred embodiment, an interface having upper and lower body members are formed with a sensor post receiving bore (16c) for attachment to the post. The body members are formed with spaced apart, radially extending face surfaces, each formed with an annular recess aligned with each other and with a compliant member received therein and fixed to the respective body members and extending beyond the face surfaces. The interface is received through a bore of a support plate to which the sensor is mounted with the compliant members engaging opposite face surfaces of the support plate allowing limited pivotal motion and with a compliant member limiting lateral movement of the interface relative to the support plate.

A patch antenna receives circularly polarized RF signals from a satellite. The antenna includes a radiating element. A plurality of feed lines feed the radiating element at a plurality of feed points. The feed points are spaced apart to generate a circularly polarized radiation beam solely in a higher order mode at a desired frequency. The antenna may include a plurality of parasitic structures. The feed point spacing and / or the parasitic structures tilt the radiating beam away from an axis perpendicular to the radiating element. Thus, the patch antenna provides excellent RF signal reception from satellites at low elevation angles.

A multi-frequency antenna for receiving a first frequency and second frequency signals comprises a grounding element, a first conductive member, a first radiation member, and a second radiation member. The first conductive member connects to the grounding element. The first radiation member and the second radiation member connect to the first conductive member separately. The multi-frequency antenna further comprises a parasitic structure. The parasitic structure structurally encircles the second radiation member and the encirclement is a partial encirclement. Moreover, the parasitic structure connects to the grounding element.

The invention discloses a bidirectional ESD protection device with a composite structure, which belongs to the fields of electrostatic discharge protection and anti-surge of integrated circuits. The device is mainly composed of a P-type lightly doped substrate, an N-type doped well, a first P-type medium-doped well, a second P-type medium-doped well, a first P-type heavily doped implant region, a first N-type heavily doped implant region, second P-type heavily doped implant region, second N-type heavily doped implant region, first polysilicon gate and its covered first thin gate oxide layer, third N-type heavily doped implant region The doping implantation region, the fourth N-type heavily doped implantation region, the second polysilicon gate and its covered second thin gate oxide layer, and the fifth N-type heavily doped implantation region. The present invention improves the base concentration of the parasitic NPN transistor inside the device through the layout design and the use of the P-type doped well, reduces the magnification of the internal parasitic NPN transistor, weakens the positive feedback degree of the parasitic SCR structure, and can increase the maintenance voltage of the device and enhance ESD robustness.

The invention relates to a multi-frequency antenna, which is used for receiving the signals of a first frequency and a second frequency. The invention at least comprises a grounding part, a first conducting component, a first radiation part and a second radiation part. The first conducting component is mutually connected with the grounding part. The first radiation part and the second radiation part are respectively connected on the first conducting component. In addition, the multi-frequency antenna also comprises a parasitic structure surrounding the second radiation part, and the parasiticstructure is mutually connected with the grounding part.