4results about How to "Reduce insertion loss" patented technology

The invention discloses a multi-frequency amplification device. The multi-frequency amplification device comprises a plurality of narrowband input amplification modules, a plurality of power supply change-over switches and a broadband output amplification module, each input end of each narrowband input amplification module receives each input signal; the output ends of the narrowband input amplification modules share a compound contact; each narrowband input amplification module is connected with the input end of the broadband output amplification module through the reconnection point; the output end of the broadband output amplification module outputs signals of different frequency bands; and each power supply change-over switch is correspondingly connected with the power supply end of each narrowband input amplification module and is used for controlling and switching any narrowband input amplification module to work. According to the scheme, the insertion loss of each narrowband input amplification module is reduced, and each narrowband input amplification module can meet the conditions of signal gating and matching optimization in the respective working frequency band, so that the output power, efficiency and amplification gain of the multi-frequency amplification device are improved.

The invention relates to the technical field of numerical control attenuator structure design, in particular to a millimeter wave attenuator high and low temperature compensation circuit. Comprising a first control unit, a second control unit and a temperature compensation unit, by arranging the temperature compensation unit, when the introduced bias voltage rises, the threshold voltage of the first control unit and the second control unit is reduced, so that the on-resistance is reduced, the trend that the on-resistance is increased when the temperature rises is counteracted, and the on-resistance is kept unchanged as much as possible when the temperature rises; reference state insertion loss and attenuation of the attenuator are kept unchanged.

The utility model discloses a kind of light hole connectors, it is related to high-frequency connector technical field, including outer conductor, insulating medium and inner conductor, the outer conductor top is equipped with bowl mouth introduction type interface, the inner wall of bowl mouth introduction type interface has the guide chamfer of 30 °-45 °;Annular boss is equipped in the middle part of outer conductor inner wall;The insulating medium is filled between outer conductor and inner conductor by high-temperature sintering, and the lower surface of insulating medium and annular boss upper surface are closely combined;The inner conductor includes coaxially arranged upper portion step column and lower cylinder, and the diameter of upper portion step column is 0.2mm-0.3mm larger than lower cylinder;The outer conductor bottom is equipped with four round pins, and stress release groove is equipped in pin root portion. The design comprehensively solves the key technical problems such as insertion precision, interface reliability and stress distribution, and greatly prolongs the service life of connector.

The application discloses a lossless calibration method for switching delay chip of an optical switch, and comprises a multi-channel voltage output module, an optical power detection module and a single-chip microcomputer module to form a calibration and control system of the switching delay chip of the optical switch. n The method can obtain the maximum output extinction ratio of each optical switch at the last port by iteratively optimizing the control voltage of all optical switches in the switching delay chip of the optical switch. With the increase of the iteration number, the output extinction ratio will continuously increase to the preset range and remain stable, and finally the control voltage of the "straight-through" and "crossing" states of each optical switch in the switching delay chip of the optical switch is obtained. The application realizes the automatic, simple and lossless calibration of the control voltage of each stage optical switch in the switching delay chip of the optical switch by iteration optimization without introducing additional optical devices.