The design of a novel practical 28 GHz beam steering phased array antenna for future fifth generation mobile device applications is presented in this communication. proposed has 16 cavity-backed slot elements that are implemented via the metallic back casing device, which two eight-element arrays built on left- and right-side edges device. Each can yield at broadside gain >15 dBi be achieved boresight. measured 10 dB return loss bandwidth element was approximately 27.5-30 GHz. In addition,...

In this paper, a novel sensorless control strategy with the injection of high-frequency pulsating sinusoidal voltage into rotating reference frame for surface-mounted permanent magnet synchronous motor (SPMSM) is proposed. Conventional schemes may face problems applying to no obvious salient pole effect, and effect filter on bandwidth system. Different from conventional schemes, new proposed injects signal injected estimate d-q frame, rotor position information obtained response current in...

A simple polarization reconfigurable printed monopole antenna is proposed for wireless applications. Conducting strips are used to connect the ground plane providing necessary additional modes circular polarization. Linear polarization, right-hand or left-hand can be realized using only two PIN diodes, which plane, minimizing their effect on radiation characteristics. The mechanism described, and key parameters studied optimized. prototyped tested all configurations.

A low-sidelobe-level (SLL) and wideband series-fed linear dielectric resonator antenna (DRA) array is presented. To enhance the impedance bandwidth of DRA element, feeding rings under are used slot windows etched on ground plane. Chebyshev amplitude distribution to get a low SLL. improve gain increase front-to-back ratio array, reflector plane placed at back array. The proposed fabricated measured, structure performances presented discussed in this letter.

A simple pattern reconfigurable printed inverted-F antenna is presented for WLAN applications. The proposed low profile monopole consists of one main radiator and parasitic element. capable switching both the polarization across full 205 MHz bandwidth, using only PIN diode. measured gain ON OFF modes are 1.2 dBi 4.2 dBi, respectively. operating mechanism described, key parameters studied optimized. envelope correlation coefficient used to evaluate switched diversity.

In this paper, a V-band low sidelobe and wideband series fed linear dielectric resonator antenna (DRA) array is proposed. Among many kinds of DRAs, the perforated rectangular (RDRA) chosen as element in our design, which can enhance impedance bandwidth by lowering down quality factor. By optimizing size slots distance between adjacent slots, fundamental TE111 mode RDRA preserved. Besides enhancement bandwidth, such structure also miniaturize elements, light weight reduce mutual coupling...

Backside (BS) interconnects has shown significant advantages in 3D integral circuits for tackling the technology scaling induced frontside (FS) back-end-of-line (BEOL) routing congestion and RC delay challenge. As a representative BS architecture, Xtacking ® 1.0 & 2.0 innovated by YMTC employs one Al metal layer at backside of memory cell wafer as interconnect signal transfer. In this paper, we exploit effect silicon substrate to stress migration (SM) reliability such interconnects, offer...

In this paper, a new sensorless control scheme with the injection of high-frequency square-wave voltage an interior permanent-magnet synchronous motor (IPMSM) at low- and zero-speed operation is proposed. Conventional schemes may face problems obvious current sampling noise slow identification in process magnetic polarity detection zero speed operation, effects inverter error on rotor position estimation accuracy low operation. Based principle analysis d-axis circuit characteristics, method...

State-of-the-art circuit breakers embodying a predetermined fixed current limit exhibit difficulty in differentiating large inrush during startups and gentle overcurrent on-state with load, thus often fail to provide prompt protection. This paper presents monolithically integrated solid-state breaker that features variable by means of employing our proposed real-time programmable controller, low quiescent Darlington-LDMOS-based high-voltage regulator, fast detection speed improved on-chip...

Infrared small-scale pedestrian detection is particularly important at night and under low-light conditions, but it also faces great challenges, such as the small size of pedestrians unclear target features. In order to solve these problems, this paper introduces two attention mechanisms based on YOLOv5s model: channel mechanism (CA) efficient (ECA) enhance model's ability identify infrared targets. By integrating in model, aims improve accuracy robustness detection. addition, study...

Aiming at the advantage of cavity backed antenna, a wideband circularly polarized slot antenna is presented. The designed consists cavity, radiating slot, substrate, and inducting each has disturbing branch. fed by CPW feed line. antenna's impedance bandwidth 34% (37.8-52.5GHz) its circular polarization 15% (37.7-43.8GHz). results indicated that property proposed valid for Q-band communications.

An X-band phased-array antenna unit with harmonic suppression is formed on the basis of a printed dipole by integrating low-pass filter transformed radial stubs(TRS) fed stripline. The only 2.44mm higher than without suppression. measured results 8×8 small test array show that fundamental wave respect to second at least 15 dB, and average can reach 20dB.

It is an important goal of the modern medical education to culture innovative ability students. In clinic teaching thoracic surgery, illuminating thinking, optimizing and recombining contents, flexible utilizing approach methods, innovating practical are in favor creating thinking students. Key words: Thoracic surgery;  The teaching;  Innovative ability;  Cultivation talents

The stable spatial polarization characteristic (SPC) of wide-band, wide-scanning angle phased antenna array has always been a significant challenge. A 45° linear-polarized Banyan Tree Antenna (BTA) operated over S to C band is designed in this paper, which covers triple frequency with maximum scanning ±45°. element within an infinite for VSWR < 2.6 when up Compared traditional BTA array, we found that the matching structure at feeding position can enhance active reflection coefficients...

With the coming of network era and continuous improvement information requirement, fault diagnosis devices is advancing from traditional mono device field mode to distributed remote mode, which can largely improve ability maintenance. Several NI technologies are used in this paper realize virtual instrument application computer support collaborative work environment for diagnosis. A simulated experiment on Fault Diagnosis Analogue Circuits system performed feasibility scheme proved.

In this paper, a novel millimeter wave (mm-Wave) phased array antenna has been investigated for the upcoming 5th generation mobile device. The radiating element is composed of cavity-backed slot with gradual step inside which connected to short pin that connects micostrip feeding line. proposed working at frequency 28 GHz and can be easily integrated into current metallic frame handset devices while maintaining good beam-steering characteristic. Extensive simulations ascertain mm-Wave highly...

High-performance control of induction motors is inseparable from accurate motor parameters. Online identification parameters can provide for in real time, so it particularly important. In this paper, the traditional voltage flux observer improved. The high-pass filter connected series with low-pass filter, and then amplitude phase compensation methods are used to obtain improved voltage-type linkage observation method. current-type method also introduced. Then principle model reference...