A5054528121- Microwave Engineering and Waveguides
- Microwave and Dielectric Measurement Techniques
- Radio Frequency Integrated Circuit Design
- Terahertz technology and applications
- Superconducting and THz Device Technology
- Electromagnetic Compatibility and Noise Suppression
- Electromagnetic Compatibility and Measurements
- Electrostatic Discharge in Electronics
- Thermography and Photoacoustic Techniques
- Silicon Carbide Semiconductor Technologies
- Optical and Acousto-Optic Technologies
- Millimeter-Wave Propagation and Modeling
- Acoustic Wave Resonator Technologies
- Semiconductor Quantum Structures and Devices
Beihang University
2022-2024
The design, analysis, implementation and measurement of an integrated V-band receiver front-end based on 0.15 μm GaAs pHEMT process are presented in this paper. chip uses the super-heterodyne topology which consists a low noise amplifier, image reject mixer, multiply-by-four (×4) LO chain. In order to minimize power consumed by chain, active single-ended mixer is designed requires extremely -5 dBm. Meanwhile, effect signal coupling analyzed solutions proposed. By introducing appropriate...
During circuit conduction immunity simulation assessments, the existing black-box modeling methods for chips generally involve use of time-domain-based or ICIM-CI binary decision models, which can provide approximate assessments but require a high number tests to be performed when carrying out broadband as well having long time and demonstrating poor reproducibility insufficient accuracy in capturing complex electromagnetic response frequency domain. To address these issues, this paper, we...
This paper presents a Ka band eight-channel integrated packaged phased array receiver front-end for passive millimeter-wave imaging system. Since multiple receiving channels are in given package, the mutual coupling issue affecting channel will deteriorate quality. Therefore, this study, influence of on system pattern and amplitude phase error is analyzed, design requirements proposed according to results. During implementation, paths discussed, circuits path modeled designed reduce level...
Six-port technology has been widely used in microwave systems, such as interferometric passive imaging. In this paper, an integrated Ka-band (32-36 GHz) six-port chip based on the 0.15-μm GaAs is designed and fabricated to simplify circuit structure miniaturize volume of imaging system. The integrates two amplifiers, phase shifters, a part analog complex correlator. chip, crosstalk between amplifiers cannot be ignored. This paper analyzes influence isolation correlation results guide design....
Operational amplifiers (op-amps) are widely used in circuit systems. The increasing complexity of the power supply network has led to susceptibility port electromagnetic interference (EMI) Therefore, it is necessary investigate (EMS) op-amps at port. In this paper, we assessed effect EMI on operational performance through by a bulk current injection (BCI) method. Firstly, conducted continuous sine wave into probe and measured change offset voltage under EMI. Secondly, proposed new method...
In this paper, the design, fabrication, and measurement of a compact broadband (4–8 GHz) analog complex correlator for passive millimeter-wave imaging system are presented. To achieve high sensitivity integration system, wideband miniaturization required. The achieves wide bandwidth by using add-and-square method, which is composed six-port circuit detection circuit. order to realize correlator, realized on chip base 0.15-μm gallium arsenide (GaAs) process. influence mismatch that employs...
This paper presents the coupling effects analysis and suppression of a highly integrated receiver front-end MMIC for passive millimeter-wave imager system. The consists low-noise amplifier, double-balanced image-reject mixer, frequency quadrupler, analog phase shifter. In order to integrate these devices into compact single chip without affecting core performance, problems need be solved. We analyze influence on image rejection ratio, propose corresponding solutions three different paths....
Human body temperature is a fundamental physiological sign that reflects the state of physical health. It important to achieve high-accuracy detection for non-contact human measurement. In this article, Ka band (32 36 GHz) analog complex correlator using integrated six-port chip proposed, and millimeter-wave thermometer system based on designed completed The utilizes technique large bandwidth high sensitivity, miniaturization achieved through an chip. By performing single-frequency test...
In this paper, a novel broadband lumped-element quadrature hybrid MMIC for interferometric correlation radiometer is proposed. First, the cause of bandwidth limitation in branch-line coupler analyzed, which two identical parallel branches have same frequency response leading to reinforced resonance and narrow band. order reduce such unfavorable superposition effect, with opposite responses are used, exhibits characteristic similar rat-race coupler. To realize hybrid, phase-shifting network...
An eight-channel phased array (PA) radiometer front-end is developed to serve video-rate passive millimeter wave (PMMW) imaging at <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${V}$ </tex-math></inline-formula> -band. The implemented by multichip module (MCM), in which all active microwave functions are realized with GaAs monolithic integrated circuits (MMICs) while devices and connection lines designed...