3results about How to "No reflection" patented technology

The invention discloses a hybrid photomultiplier coaxial output structure based on a microstrip line. The hybrid photomultiplier coaxial output structure comprises a semiconductor detector, a bonding wire, the microstrip line, a ground electrode, a lead pin, a medium, an outer conductor base and a detector lead pin. The semiconductor detector is used for receiving the photoelectrons converted by the photoelectric cathode and generating a current signal; the bonding wire is used for electrically connecting the semiconductor detector and the microstrip structure; the microstrip line and the ground electrode adopt gold-plated kovar alloy parts to form an in-tube microstrip structure; the guide pin and the detector guide pin are kovar alloy guide pins and form an inner conductor with a coaxial structure; the outer conductor base is a kovar alloy disc and forms an outer conductor with a coaxial structure; the medium is glass or ceramic. According to the coaxial output structure, a vacuum tube is of a 50-ohm microstrip structure, the exterior of the vacuum tube is of a 50-ohm SMA coaxial structure, and a complete 50-ohm coaxial line is formed by connecting a microstrip line and a guide pin together. The structure provided by the invention has the advantages of high transmission speed, small signal reflection and oscillation and the like, and is more beneficial to detection of ultrafast optical pulse signals.

This invention discloses a broadband frequency-shifting conformal transmission method for electromagnetic waves based on a time-varying circuit with dual constitutive parameters, belonging to the fields of microwave radio frequency, time metamaterials, and frequency domain transformation technology. The method is implemented using a frequency-shifting transmission circuit, which includes a microstrip transmission line and a periodically loaded inductor branch. The inductor branch includes switches, series inductors, and parallel inductors. When all switches in the frequency-shifting transmission circuit are open, an input pulse signal is sent to the circuit. When the pulse signal has fully entered the microstrip transmission line, all switches close simultaneously. Due to the wavenumber conservation of the microstrip transmission line, frequency shift occurs, achieving frequency-shifting transmission. This method does not rely on a complex local oscillator system, does not increase circuit complexity excessively, and theoretically does not generate harmonics. It achieves broadband frequency shifting, reflection-free, high-efficiency transmission, and waveform distortion-free conformal transmission, providing a new technical path for broadband, low-distortion signal processing in the microwave radio frequency field.

The application discloses a method for supplementing a blind area of a visual line during navigation by using a camera, relates to the electric equipment technical field of the ship repairing and manufacturing industry, and comprises the following steps: S1, preliminary preparation: the staff needs to complete equipment inspection, point confirmation and line planning, and if the equipment is faulty or damaged, the equipment needs to be replaced or repaired in time. The method for supplementing the blind area of the visual line during navigation by using the camera, through installing the camera on the stern and connecting the camera to the display of the bridge by an optical fiber, is used for supplementing the visual line during navigation, accurately covering all observation dead angles, enabling the driver to view the complete picture of the blind area in the driver's cabin in real time, completely solving the problem of limited observation caused by the obstruction of the ship structure, greatly improving the safety of navigation, berthing and unberthing and reversing operation, being more favorable for guaranteeing the navigation safety of the ship, and through selecting the special camera which is resistant to interference, waterproof and dustproof, the optical fiber transmission can effectively avoid electromagnetic interference of a machine cabin and a rudder machine, and the line planning avoids the wear and collision area.