49results about How to "Prevent signal leakage" patented technology

A switch module includes a first terminal, first and second filters, and first and second switches. Impedance of the first filter for a signal in a stop band is capacitive. When the first switch is turned OFF, impedance of the first switch is capacitive, and impedance of the first filter seen from an end portion of the first switch connected to the first filter is not in a short state and impedance of the first filter seen from the first terminal is in an open state.

A high-frequency module includes at least first and second signal circuits that are each connected between a common antenna port and at least first and second signal ports. The first signal circuit includes a first inductor connected in series between the antenna port and the first signal port, a first capacitor connected in series between the first inductor and the first signal port, and a second inductor connected in shunt between the first capacitor and the first signal port. Series resonance is produced between the first inductor, the first capacitor, and the second inductor at a frequency within the frequency band of a target signal of the second signal circuit.

The invention discloses a quick-inserting type millimeter wave connector for testing. The quick-inserting type millimeter wave connector comprises a connector main body, wherein a quick-inserting structure is arranged at one end of the connector main body; the quick-inserting structure comprises a first shell; a contact pin is arranged in the first shell; an insulating supporting dielectric is arranged on the periphery of the contact pin; the first shell is mounted in a second shell in a pressing manner; a contact head is arranged between the first shell and the first shell; a gap is formed between the contact head and the first shell; and a splitting groove is formed in the contact head. By setting the splitting groove in the contact head, the problem of signal leakage is avoided; and in addition, by adoption of the quick-inserting structure, the quick inserting of the connector is realized, thereby increasing the connecting speed.

A semiconductor structure includes a substrate including a first side and a second side opposite to the first side; a first via extending through the substrate; a second via extending through the substrate; and a metallic structure disposed between the first via and the second via, wherein the first via is isolated from the second via by the metallic structure, the first via and the second via areconfigured to connect to a signal source or transmit a signal, and the metallic structure is configured to connect to a power or a ground.

A switch module includes a first terminal, first and second filters, and first and second switches. Impedance of the first filter for a signal in a stop band is capacitive. When the first switch is turned OFF, impedance of the first switch is capacitive, and impedance of the first filter seen from an end portion of the first switch connected to the first filter is not in a short state and impedance of the first filter seen from the first terminal is in an open state.

A cable television tuner includes a metal cabinet having compartments isolated from first to fourth. In the first to fourth isolated cells, a data circuit, an input filter circuit, a first mixer circuit, a first local oscillator circuit, a first intermediate frequency circuit, and other components are accommodated. In the fifth isolated chamber, a second intermediate frequency circuit and an integrated circuit including a second local oscillator circuit are housed. According to such a structure, the present CATV tuner is defined as an up / down tuner. A third isolated cell containing the first local oscillator circuit and a fifth isolated cell containing the second local oscillator circuit are disposed adjacent to each other. Both the transmission line and the terminals are used by the first PLL circuit and the second PLL circuit.

A corrugated plate for architectural shielding and connection structure thereof, including waveshaped templates (1) shielding connected with each other, among the waveshaped templates (1) are connected by crimping structure or clamping structure, and the adjacent waveshaped templates (1) are electrically connected. In addition to conventional crimping, spiro union, riveting, welding and other programs, the invention provided seams shielding connection structure specifically utilizes resistance welding process, the seams are shielding connected by forcipated spot welding, the connection surfacehas small contact resistance, the surface has no damage and conquers defects of screw and riveting, both reducing shielding efficiency of seams caused by oxidation corrosion and conquering defects ofcontinuous welding, that are defects of large internal stress, surface irregularity and pollution in construction process. The process is provided with reliable connection, high efficiency, low costand good construction adaptability.

The invention relates to the technical field of quality testing for a frequency converter, and provides a quality testing method used on a microwave frequency converter. The quality testing method comprises the following steps: product assembling testing, burn-in testing, high-temperature and low-temperature testing, shielding cover locking operation, thermal-testing and cold-soaking verifying and vibration falling-off testing. Product assembling testing is used. A product use state is tested in a vibration environment, noise environment, gain environment or / and signal isolation environment. The product of the invention is suitable for various environments. Burn-in testing is used and longer service life of the product is realized. High-temperature and low-temperature testing is used, and the product can be used at an extreme temperature. Shielding cover locking operation is used for preventing signal leakage, realizing a waterproof and leakage-proof performance, and preventing entry of foreign matter into the product. Thermal-testing and cold-soaking verifying is used, and an excellent waterproof effect of the product is realized. Vibration falling-off testing is used, and high stability of a product package is obtained. In a word, the microwave frequency converter which is manufactured according to the quality testing method used on the microwave frequency converter has advantages of excellent waterproof effect, high in-use stability of the product and long service life. Furthermore the quality testing method satisfies a requirement for high-standard and high-quality products.

The invention discloses a cavity filter, a filter cavity and an installation method of a connector. In the embodiment of the invention, a connector installation hole is arranged on the top surface of an isolation rib or the side wall of the cavity and is communicated with a resonant cavity, and closed regions surround the connector installation hole. After the connector and a cover plate are installed, the resonant cavity and the outside can be reliably isolated, thus avoiding signal leakage and interference of signal leakage with other equipment in the system except the filter.