12results about How to "Small insertion loss" patented technology

The utility model relates to the converter technical field, and specifically discloses a DP revolution female adapter comprising a DP female joint structure and a DP male joint structure, the DP female joint structure and the DP male joint structure are connected through a wire rod, the DP female joint structure comprises a female joint housing, a female joint plug is fixed on the surface of one side of the female joint housing in an embedded manner, and the DP male joint structure is connected with the DP male joint structure through a wire rod. The other side of the female head shell is connected with a wire rod in a penetrating mode, and a PCBA board is fixedly installed in the female head shell. According to the device, the PCBA board is arranged in the female head shell, the PS4863 chip is arranged on the surface of the PCBA board, and the PCBA board is connected with the female head plug, so that display card signals can be restored and enhanced through the PS4863 chip in the conversion process between the male head and the female head, the insertion loss of the adapter is effectively reduced, the display resolution is improved, the situation that a screen is blurred or cannot be displayed is avoided, and the display quality is improved. The display effect after equipment connection is improved, and the requirement of a user for high-definition display is met.

The utility model relates to the technical field of laser phase control, and discloses an optical fiber tensioner based on piezoelectric ceramic driving, which comprises a base, and one side of the upper surface of the base is provided with an opening through groove; the optical fiber is wound on the outer side of the base and is used for inputting and outputting laser; the piezoelectric ceramic is arranged in the base through a limiting groove, the limiting groove is formed in the open through groove, and the piezoelectric ceramic is used for generating deformation displacement; and the extension spring is arranged in the open through groove, the extension spring is parallel to the deformation direction of the piezoelectric ceramic, and the extension spring is used for improving the elastic recovery capability of the base.

The application discloses an S-band reflective phase shifter based on a cross-coupling line coupler, and belongs to the fields of wireless communication and digital signal processing. The reflective phase shifter is designed based on the cross-coupling line coupler, has the advantages of small size, low insertion loss and wide bandwidth compared with existing branch line couplers and Langer couplers, can replace the digital phase shifter used by a traditional phased array antenna, and solves the problems of high cost and high power consumption of the traditional phased array antenna. In addition, the reflective phase shifter can be integrated on a PCB, has the advantages of easy processing, low cost and small size, is easy to be integrated with a planar printed phased array antenna, and realizes the miniaturization and low cost of the phased array antenna.

This application provides an integrated passive filter circuit, including two first filter units, two second filter units, and a third filter unit. Each filter unit includes a main path and a grounding element connected to the main path. The two second filter units are symmetrical with respect to the third filter unit. The two first filter units are symmetrical with respect to the two second and third filter units. The end of the main path of the first filter unit serves as the port of the integrated passive filter circuit. The third filter unit includes two parallel and different grounding elements. The solution provided in this application employs a semi-symmetrical structure design. The symmetrical structure on both sides effectively improves the consistency at both ends of the filter and simplifies the adjustment of the reflection characteristics on both sides of the device. The asymmetrical structure in the middle improves out-of-band rejection on both sides, reduces the number of devices, and lowers device insertion loss.

The utility model discloses a packaged coupled antenna, belongs to the technical field of radio frequency communication and semiconductor packaging, and mainly solves the problems that a traditional packaged antenna is large in insertion loss, high in processing complexity and difficult to balance in performance and size. The antenna comprises a chip Die, an antenna coupling patch, an antenna radiation patch, a metal ground reflecting surface and a multi-layer packaging structure, and efficient transmission and radiation of radio frequency signals are achieved through non-contact electromagnetic coupling. Specifically, the antenna coupling patch is arranged on the middle layer of the on-chip packaging plate and is connected with the chip Die through a radio frequency signal line; the antenna radiation patch is arranged in parallel on the top layer of the packaging plate, the coupling patch is surrounded by a grounding metal through hole, and the lower end of the through hole is connected with a metal ground reflecting surface to form an electromagnetic shielding structure to reduce interference. According to the packaging coupling antenna, the length of the feeder line can be reduced through a coupling mode, so that the insertion loss of a radio frequency link is reduced, radio frequency wiring becomes simple, the processing difficulty is reduced, and the antenna performance is improved.

This invention discloses an ultra-wideband high-power single-pole double-throw switch circuit with adjustable isolation, belonging to the field of microwave integrated circuit technology. The first and second branches of this circuit have identical structural parameters and are symmetrical about the microstrip line MILN1. Both the first and second branches can function as either conducting or isolating branches. Therefore, one branch can be used as a conducting branch for low-insertion-loss transmission of the input signal, while the other branch acts as an isolating branch to block the input signal transmission, thus achieving both low insertion loss and high isolation for the entire circuit. Furthermore, by adjusting the control voltage of transistor Q7 in the reconfigurable stub, the isolation can be further improved and adjusted according to changes in the desired operating frequency band. In this invention's circuit, adjusting the isolation does not affect the switch's power capacity or the insertion loss of the other branch, solving the problems of bandwidth limitations on isolation and poor high-frequency isolation in high-power single-pole double-throw switches.

The invention discloses a high-power 4.5 GHz femtosecond laser generating device based on a Yb: KGW crystal, and belongs to the technical field of all-solid-state ultrafast laser. The device comprises a multimode pumping source, a collimation focusing system, a pair of plane mirrors serving as folding elements, a Yb: KGW crystal, a large-curvature radius concave mirror with a dispersion compensation function, a small-hole diaphragm and a large-curvature radius output coupling mirror. The length of a physical cavity is compressed by folding a light path through a plane mirror so as to realize the repetition frequency of more than GHz, and meanwhile, a laser mode at a gain crystal is increased by utilizing a large-curvature radius lens combination so as to be matched with a multimode pumping light spot. In combination with intracavity dispersion management and a hard Kerr lens mode locking technology, high-performance femtosecond laser output with the repetition frequency larger than 4 GHz and the average power larger than 3 W is finally achieved. The device is compact in structure, low in cost and good in stability, and has important application value in the fields of optical frequency combs, biological imaging, micromachining and the like.

This application belongs to the field of laser regenerative amplification, specifically disclosing a high-energy pulse train regenerative amplifier based on electro-optic modulation programmable. This application applies phase disturbance and amplitude modulation to the pulses using an electro-optic modulator (EOM), coupled with an active feedback system based on a spectrometer and piezoelectric ceramic (PZT). The electro-optic modulator and PZT are matched in response speed; the bandwidth of the EOM must be sufficiently high to handle the independent modulation of each pulse, while the bandwidth of the PZT needs to be able to track cavity length changes caused by environmental disturbances. Because the electro-optic modulator can precisely and rapidly control the phase and amplitude of each pulse, disrupting the fixed phase relationship between pulses, it avoids spectral modulation effects caused by coherent superposition, improves spectral uniformity, and achieves uniform and efficient amplification of multiple pulse trains, significantly improving energy extraction efficiency and system output stability.

This invention discloses a small, equal-band dual-frequency transceiver based on wireless communication technology. It includes a ceramic dielectric body, a tuning element, a multilayer circuit body, and an external electrode assembly. The tuning element is disposed on top of the ceramic dielectric body. The multilayer circuit body is disposed inside the ceramic dielectric body and electrically connected to the tuning element through a via structure. The multilayer circuit body includes a low-frequency channel filter and a high-frequency channel filter. The external electrode assembly is disposed at the bottom of the ceramic dielectric body. The low-frequency channel filter outputs signals within a set low-frequency band, and the high-frequency channel filter outputs signals within a set high-frequency band. This invention achieves a large capacitance value within a small volume by using vertical coupling. By setting the tuning element, the stopband bandwidth and suppression depth of the dual-frequency transceiver can be flexibly adjusted by changing the value of the tuning element, resulting in miniaturization, wide stopband, high suppression, and tunability.

The invention discloses an antenna and electronic equipment, and the antenna comprises a first antenna array, a second antenna array, a single board, a radiator, and a first radio frequency connector, and the first antenna array and the second antenna array are used for transmitting and / or receiving signals. The single board is provided with one or more components for processing signals; the radiator is used for radiating the assembly; the first radio frequency connector is used for the signal connection assembly and the first antenna array; the second antenna array, the single board, the radiator and the first antenna array are stacked in the first direction; the radiator is located between the single board and the first antenna array, and the single board is located between the second antenna array and the radiator; the radiator comprises a plurality of radiating tooth sheets which are arranged in a stacked mode in the second direction or the third direction, a gap is formed between at least two adjacent radiating tooth sheets, the first radio frequency connector is contained in the gap, and the first direction, the second direction and the third direction are perpendicular to one another. According to the antenna and the electronic equipment provided by the embodiment of the invention, the networking investment cost can be reduced.

The application relates to a power amplifier and an output stage circuit thereof. The output stage circuit comprises at least one matching frequency selection network; the matching frequency selection network comprises: a first LC network comprising a first inductive unit and a first capacitive unit in parallel, wherein a first end of the first inductive unit is used for being connected with a first pole of a power tube in the power amplifier, and a second end of the first inductive unit is used for being connected with a load in the power amplifier; and a second LC network comprising a second inductive unit and a second capacitive unit in parallel, wherein a first end of the second inductive unit is connected with a target end of the first inductive unit, and a second end of the second inductive unit is grounded; the target end of the first inductive unit is the first end or the second end of the first inductive unit; and the matching frequency selection network is used for realizing matching between an output impedance of the power tube and an impedance of the load, and selecting a signal in a working frequency band of the power amplifier. The output stage circuit of the power amplifier provided by the application has the characteristics of simple structure and low cost.

This invention discloses a high-Q tuned filter, belonging to the field of tuned filter technology. The tuned filter includes two symmetrically arranged resonant cavities, each connected in parallel with an inductor. This invention reduces the current density of a single coil, suppresses high-frequency skin and proximity effects, significantly reduces the high-frequency loss resistance of the inductor, and significantly improves the Q value at the same operating frequency. It directly reduces in-band insertion loss and improves out-of-band rejection depth, resulting in a significant improvement in filtering accuracy and anti-interference capability.