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This paper presented the design of a wearable EEG-based control network and emergency medical assistance system which works and is now under test by volunteers. The system can detect the user's blink control signal, heart rates and brain signal, etc. A new scheme to control the device for disabilities was proposed in the paper. A DSP was used to calculate and process these data which can also send...
Integrating the concept of Antipodal Vivaldi antenna (AVA) and planar disc-shaped dipole, a half space radiation UWB antenna is proposed in this letter. The antenna adopted approximately 1/4 of the disc-shaped dipole as its radiator, fed by the AVA's exponential slot structure. The proposed antenna has an ultra-wide bandwidth and nearly half space radiation pattern. This character makes it applicable...
This paper presented the design of a Fabry-Perot cavity antenna with a double-layered partially reflecting frequency selective surface (FSS) to enhance the gain and reduce the antenna height. The FSS structure placed on both sides of substrates is used to simplify the feeding structure and reduce the antenna dimensions. The performance of the proposed antenna was verified by CST microwave studio and...
A miniaturized antipodal Vivaldi antenna (AVA) with bandwidth of 1–5GHz is proposed in this letter. The miniaturization of this end-fire directional antenna was realized by employing elliptically shaped conductors with two pairs of elliptically opened slots on them and one pair of symmetrically loaded structures. Additional reflection structures was designed to ensure the antenna's directivity at...
This paper presented a gesture recognition system for human-computer interaction based on 24GHz radars. We describe this system designed for frequently used gesture detection like hand pushing, hand pulling, hand lifting and hand shaking. Decision tree was established to classify these original signals into the four sets of gestures. Through a set of tests on this gesture-recognition system, we proposed...
On the basis of previous theoretical and experimental investigation there proposed and described the technical decision about examined possibility to do the receiver-frequency-meter-tuner of generators on the Josephson junctions (JJ) working in super wide band. It can be especially convenient for the experimental purposes with new generation structures when radiate power is small and frequency are...
A novel compact printed antenna fed by CPW with WLAN band rejection for UWB applications is proposed in this paper. This symmetrical antenna features three parts: a semicircular stub as the UWB radiator, a pair of modified compact patches which are integrated smoothly as the ground plane with the line-to-arc transition structures, and two U-shaped slots which are embedded on the ground plane to reject...
A dual-band conical dielectric resonator antenna with circular patch feed has been presented in this paper. Using conical dielectric resonator, the resonance frequency of monopole can be reduced contributing to antenna miniaturization, and high-order hybrid mode resonance can be achieved for another operating band. The circular patch fed by coaxial line performs the functions of the feeding structure...
This paper presented the design of a linear polarized antenna module for bioradar sensors using microstrip arrays. This antenna module was designed operating at 77GHz for remote contactless evaluation of human vial signals. This antenna module consisted of a series of vertically aligned linear arrays. Each of the linear array was formed by 10 micro patches connected by quarter-wave impedance transformers...
A novel dielectric resonator antenna with an ultra-wideband (UWB) bandwidth and great time-domain performances has been proposed. The proposed feed for cone dielectric resonator antenna is a circular patch, which has the potential to achieve ultra-wideband characteristic. The operating frequency range of the antenna is 2.77–11.63GHz. The design provides constant group delay, consistent omni-directional...
In this paper, a new millimeter-wave transmitting/receiving antenna module for bioradar sensors was proposed. This antenna was designed operating at 24 GHz for remote contactless evaluation of the human organism adaptation to physical and mental stress. This module was divided into two parts, both of which were implemented by a microstrip array antenna sub-module. The feed networks were also optimized...
The paper describes an approach of indoor multiple moving target detection and tracking using Ultra Wide-band(UWB) signals. The approach utilizes estimating the time of arrival(TOA) of the UWB pulses through a linear antenna array, providing a real-time computation of moving targets position in X-Y plane. The results of the proposed approach show a reliable and responsive performance in monitoring...
This paper introduced a method of investigating radar cross sections (RCS) of the target object using an ultra-wide band radar. Unlike the conventional RCS measurement in frequency domain, this time domain RCS measurement adopted a series of ultra-short pulses to acquire the frequency responses of the echoes scattered from the target object under test. Analyzing the effective power of the echoes scattered...
One of the critical technologies is combining both of superconductive and semiconductor technologies on a single substrate, including creating Josephson junction (JJ) near the gate of a semiconductor transistor. The use of JJ in self-pumping mode regime as one of the heterodyne detection methods can provide a new trend for designing modern passive terahertz imaging system. Further development will...
On the basis of previous theoretical and experimental investigation, here we propose the design of a super wide panoramic receiver-frequencymeter (PRF) based on the Josephson junctions (JJ). This solution is particularly suitable for experimental purposes rearding new generation structures for which radiative power is small and operating frequency is not accurately known. In particular, we present...
A Josephson junction (JJ) can be conveniently used in modern passive terahertz imaging system. JJ can be presented and described as the noise heterodyne in pixels based on the receiver consisting of JJ mixer in self-pumping regime connected with intermediate frequency amplifier. This study presents the theoretical basis and calculations of the possible sensitivity in the radiometric regime. Further...
In this paper, a new millimeter-wave transmit/receive antenna module for radar sensors was proposed. This antenna was designed operating at 24 GHz and intended for obstacle detection and short-range automotive applications. The transmitting part was implemented by a microstrip array antenna with 48-elements and improved with the concern of nonhomogeneous weights for amplitudes excitation. The receiving...
In order to release the increasing pressure of traffic flow in metropolises, this paper introduced a method of using high sensitivity microwave radiometric systems to monitor the traffic flow in all-weather conditions. In this method, radiometers were employed to detect and recognize the automobiles on the roads based on different behaviors of the automobile roofs and road surface in the millimeter...
This paper presents the guidance algorithms of chase spacecraft for autonomous proximity to target spacecraft. The process of autonomous proximity is initially divided into three phases including proximity maneuver, fly-around maneuver and final approach. Based on the Hill equation, the characteristic of each phase is analyzed and then the criteria to design guidance algorithm is proposed. Then, the...
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