Abstract: A multilayer PCB bandpass filter employing mushroom-shaped resonator elements is disclosed. The architecture targets next-generation RF front ends, including 6G. It achieves a quality factor Q of about 400 and a passband of roughly 200 MHz. Low-loss dielectric layers and controlled inter-resonator coupling are used. Each resonator includes concentric disk plates and a solid vertical via to form a high-Q capacitive element. Top and bottom ground planes, together with edge plating, create a continuous metallic enclosure. This enclosure suppresses electromagnetic leakage and stabilizes the response. Inductive coupling windows between adjacent resonators set the bandwidth and maintain good impedance matching, yielding low return loss. The filter provides low insertion loss and a compact footprint. No post-fabrication tuning is required. The structure integrates readily into communication modules and radar front ends.

Abstract: The invention relates to a sector gear drive mechanism for generating sweeping rotary motion about two perpendicular axes for devices used in search, observation, and target tracking applications. The mechanism provides dual-axis rotary motion in a horizontal direction and a vertical direction and employs meshing dual-spring-loaded gear pairs as a transmission system. The mechanism comprises a horizontal channel assembly and a vertical channel assembly. Position sensors and angular velocity sensors are arranged and configured to optimize spatial layout and reduce overall mass of the mechanism.

Abstract: A method to detect, identify and determine the position of laser points from infrared laser emitters in a firearm training simulation system. The method consists of two steps. This first step combines some common tools such as a camera with a filter switcher and edge and corner detecting algorithms in image processing to provide a fast automatic screen calibrating method. The second step is to detect laser point objects in each frame continuously captured by the camera, and then further process these objects to identify laser shots, filter out noisy objects, and eventually detect simulated shots from different laser emitters and determine the final mapped position of the shot.

Abstract: An umbilical cable cutting device for disconnecting the electrical and communication connections between an aircraft and power supply and/or control unit located outside the guide tube. includes a base plate with opening receiving the umbilical cable and another rectangular opening behind the first opening, the second opening accommodating a flat cutter and drive mechanism, the base plate upper surface having a cutting groove from the middle of the second opening extending laterally and through the first opening toward the base plate’s front edge; The cutter is mounted in the cutter track and moves in the track by a drive mechanism, the drive mechanism includes a push pin to rest on the flying device’s push pin. When the flying device is launched, the flying device’s push pin pushes the drive mechanism’s push trigger of the to cause the flat cutter to move forward to cut the umbilical cable.

Abstract: Linearized roll channel model for flight objects (FOs) constructing method has four basic steps, using the general system of equations describing motion of the FO in the horizontal plane. Assume that the FO is symmetric, initial conditions are zero, and neglect roll channel control angle influence on yaw channel forces and moments. Derive a new linear roll channel model accurately representing the FO. Basing a roll channel controller design on an accurate FO representing new linear roll channel model to achieve superior control performance, significantly reducing roll angle amplitude and enabling fast response.

Abstract: A horn antenna assembly integrated with a calibration signal system is disclosed. The antenna assembly is operable across multiple frequency bands, including S, C, X, Ku, and Ka bands. The assembly is designed to be scalable into a two-dimensional horn antenna array by increasing the number of elements along both the E-plane and H-plane axes. The design principle is based on the combination of horn antenna elements and a stepped waveguide power divider, which enables the integration of a calibration waveguide. To broaden the antenna's bandwidth, each horn element incorporates symmetric metal ridges. Furthermore, the inclusion of a stepped adapter and fillets at the corners of the power divider enhances the voltage standing wave ratio (VSWR) performance of the antenna assembly.

Abstract: A circular-to-rectangular waveguide transition for transmitting high-power radio frequency signals includes a circular flange (200), a rectangular flange (300), a circular waveguide (101), an elliptically shaped transition waveguide (102), a rectangular waveguide (103), and two impedance-matching iris bars (104).

Abstract: A method for automatic interpretation of semantic search results based on relevance levels. The method comprises four steps: step 1: retrieving reference data; step 2: generating interpretive data; step 3: training an interpretive model; step 4: generating interpretations and computing relevance levels. The proposed method enhances the retrieval performance by re-ranking or filtering low-relevance results and can be effectively applied in semantic text search systems and natural language processing applications requiring relevance evaluation and explainability.

Abstract: The invention proposes a radio communication system for data links. On the transmit side, the system uses single-carrier modulation in order to simplify the modulation design and reduce computational complexity on the transmit side so that it can be installed on airborne platforms. On the receive side, the system addresses crucial issues in high-speed data transmission and reception, including frame synchronization, frequency-offset estimation and compensation, and channel equalization in the frequency domain based on the MMSE method. As a result, the proposed system can adapt well to diverse environments and is suitable for communication systems in various fields, such as military communication systems.

Abstract: The present invention comprises an omnidirectional antenna array applicable to unmanned aerial vehicles (UAVs) to enhance communication range and signal reliability under adverse terrain or weather conditions, while maintaining compact size, lightweight structure, and omnidirectional radiation capability. The antenna comprises two monopole elements exhibiting omnidirectional radiation, which are fed with a 180-degree phase difference through a slot-to-microstrip transition structure. By arraying two monopole elements and feeding them with a 180-degree phase shift, the antenna achieves high gain and omnidirectional radiation performance, while preserving a small physical size and low mass suitable for installation on UAV platforms.

Abstract: A design for production method of composite materials that have the ability of heat insulation, ablation resistant, high reliability by bulk molding compound method, applied for specific, special parts in aerospace industry. The method comprises three main parts: (1) The production process for composite materials by bulk molding compound method; (2) The technique for bulk producing; (3) The testing method for ablation and static-pressure of final composite parts has been produced by bulk molding compound. The ingredients for this process is including of matrix resin: epoxy, phenolic and polyester; reinforcement fibre: Glass fibre (E-glass/S-glass), carbon, aramid; and some others additives, catalyst, binders. This is a simple, cost-effective method, easy to produce the composite parts with geometry diversity, easy for machining, final products have super-high strength, great heat insulation and ablation resistant.

Abstract: The proposed invention introduces a method for automatically selecting roles for Wi-Fi Access Points in a multi-AP network. It is designed for Wi-Fi Access Points that support LAN connections and adhere to the Wi-Fi EasyMesh standard published by the Wi-Fi Alliance. The method relies on the distinctive characteristics of each role to accurately determine the appropriate role for each Access Point. This innovation streamlines deployment, saving time, enhancing efficiency, and eliminating human errors.

Abstract: The session persistence method in the microservice system in the cloud environment provides a session persistence mechanism with a specific “instance” by session identifier. The method ensures the continuity of requests with the same identifier. In addition, the method brings the benefit of resource optimization when only one resource management “instance” is required for each session. The method includes the following steps: building a session management service model; allocating and storing session identifiers; monitoring, tracking, and updating session identifiers.

Abstract: The mechanism in the invention provides a solution for automated, remote regulating high pressure air in the industrial air tube system. With double layer electromagnetic valves, the mechanism assure the comfortable and safe working platform for humans and equipment. The mechanism comprises: mechanical valve, 20 L pneumatic tank, pressure gauge, sealed metal box, static disc, electromagnetic relay with movable stem, capacitor, low pressure air tube, high pressure air tube, electrical wire, electromagnetic relay.

Abstract: The high-speed search matching method with a large-scale heterogeneous database includes the process of extracting and storing the user's registered image features, forming a database, and being a reference when matching and searching; The process of initializing the search engine, in which two objects in the search engine are initialized, including a matching object, calculating the distance, and a data table object to determine the target search object for each input image sample; The process of matching and searching for objects, including the process of calculating the distance between the features and determining the target array, and finally comparing and returning the final result. The proposed method has demonstrated the ability to calculate accurately as well as very high performance, especially in large-scale data processing cases.

Abstract: The invention proposes False targets caused by reflection position determining system and solution for the SSR which helps determine reflected real target's coordinate, reflector's coordinate and features, coordinate and features of the false target (multipath target) and using these data as the basis to build up the multipath target suppressing system, guaranteeing the detecting ability of the radar. The proposed system contains: Input data generating component; False target position (multipath position) determining component; Reflected signal power comparison calculating component; Displaying and data transferring component; Reflected multipath targets suppressing component.

Abstract: The aerodynamic design method of the non-uniform perforated inverse conical flow spreader (PICFS) used in intermittent blowdown wind tunnel. This device, which is installed inside the wind tunnel's plenum chamber, is to slow down and to spread uniformly flow coming from the inlet pipe by means of tearing apart it into numerous small jets and letting those jets coalesce. This invention discovers that at least for square inlet pipe shape, a non-uniformly perforated device offers superior downstream flow uniformity to that of a uniformly perforated one. Therefore, the design process has been proposed to obtain improved freestream velocity distortion at the plane locating about 1.0-1.5 times of plenum chamber's diameter D downstream of the flow spreader, where typically is installed aerodynamic device such as honeycomb flow straightener or turbulence screen.

Abstract: The method for designing an autopilot controller for flying objectives (FOs) that adapts to velocity, altitude, and overload consists of two parts: part I focuses on determining the initial controller, and part II focuses on determining the adaptive controller. This method eliminates transfer function zeros, prevents continuous integration, and limits the control signal to ensure the operational conditions of the control loops. The use of a unified control structure allows for a consistent design and tuning process across all three control channels, thereby generalizing the control problem. The solution ensures strong adaptability across a wide range of flight scenarios for FOs, particularly those operating at high velocities, with high overload, and continuously changing altitudes.

Abstract: A rotational encoder combined with angle limit braking mechanism. The mechanism includes a braking system and a shock-absorbing spring mechanism integrated within the rotary encoder block to protect the device when operating within the desired angular travel limits. It is applied in scanning devices that require high angular position accuracy and stringent safety standards against external environmental impacts. The product of the invention is used in direct-drive motor mechanisms with high precision for angular travel limitation, such as robotic arms, fixed or mobile multi-sensor automated observation devices, and unmanned vehicles.

Abstract: The weight and center of gravity measurement equipment for aerial vehicles, comprising: a base frame, an equipment frame positioned above the base frame, first and second supporting components opposite each other at both equipment frame ends so that the line (A-A) connecting the centers of first and second clamp rings of these two supporting components is parallel to a horizontal plane; the first clamp ring is driven to rotate at predetermined angles ? around the line (A-A) by a servo motor through a gearbox; three load sensors arranged in a triangular pattern between the base and equipment frame; a processor receives signals from these load sensors, calculate the vehicle weight and center of gravity based on load values of the vehicle determined by the load sensors at the initial and at each positions where the vehicle rotated at the predetermined angle ?, and outputs the results to a display screen.