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In this paper, on-wafer de-embedding methods for passive components are evaluated for millimeter wave integrated circuit (MMW IC) design support. An electromagnetic simulation aided de-embedding (EMSAD) technique is proposed. The electromagnetic model is calibrated by matching the open-short de-embedded measurement at relatively lower frequencies. A set of Ground Coplanar Waveguide (GCPW) test structures...
This paper presents two approaches to model the startup behavior of cross-coupled oscillators for regenerative sampling applications. The first approach closely models the building blocks and connections of the circuit at the device level, whereas the second approach uses an equivalent model based on the analysis of the differential currents in the circuit to simplify the calculation and obtain a...
In this paper, a terahertz wideband sub-harmonic mixer based on the Schottky anti-parallel diodes pair and MASTER technology is presented. The mixer circuit is fabricated on a 0.05mm quartz substrate including Schottky anti-parallel diodes pair, RF/LO transition, IF matching networks and filtering circuits. The diode circuit is fabricated on a quartz substrate directly by MASTER technology. The research...
A fully hybrid computer-aided circuit design to achieve a first-pass on-board CMOS LNA fabrication is studied. The LNA is implemented in 0.13-μm CMOS process. A post-layout die-level electromagnetic-field analysis, to extract the interconnection and interaction parasitic between on-chip components, is used. The extracted touchstone model is integrated with circuit model of board including the microstrip...
Two kinds of BMA (Blind Mate A) connector for RFID (Radio Frequency Identification) system, which works at 5.8GHz, is investigated in this paper. The BMA connectors are modeled and simulated in HFSS (High Frequency Structure Simulator). By analyzing the simulation results, three specific steps are adopted to optimize and improve the performance of the RF (Radio Frequency) circuit which is used in...
This paper presents a model of direct delta-sigma receiver (DDSR) and methodology for theoretical transfer function (TF). The theoretical analysis is carried out by modeling the key elements of the DDSR, including the N-path filter, down-conversion mixer, baseband delta sigma modulator (DSM) and FIRDACs in order to optimize the loop filter coefficients. The contribution of different noise sources...
Simulating modern wireless communication systems is today a hot topic. Serious difficulties arise when these systems are composed of strongly nonlinear highly heterogeneous circuits operating in multiple time scales. In this sense, this paper provides a general overview on the existing time-domain simulation techniques, as the ones encountered in commercial packages, or the ones recently published...
This paper presents an innovative time-domain simulation method, especially conceived for simulating strongly nonlinear RF circuits whose state variables are all fluctuating in a fast-varying time scale, but evidence different time evolution rates in a slow envelope time scale. The method uses the mathematical method of lines based on modern multirate Runge-Kutta (MRK) schemes, and operates within...
In this paper a millimeter-wave radar system simulation environment for frequency-modulated continuous-wave (FMCW) radar using a 3D ray tracing channel simulator is presented. Therefore we use Agilents' RF design environment ADS® for system simulation and calculate the channel impulse response based on the data received from a 3D ray tracer in a Matlab® co-simulation. To reduce computing time the...
This paper proposes one possible method for modelling silicon based RF meander type inductors. Based on the presented electrical model specialised software (Helix Meta2) for obtaining inductor electrical parameters is developed. In order to verify simulation results test inductor structures are fabricated in the standard silicon technology. Their characteristics simulated with Helix Meta2 are compared...
In this paper, SystemC-AMS modeling capabilities of RF non-linear behaviors are studied. Thus, based on a satellite receiver case-study, SystemC-AMS simulation results are compared to several classical system-level simulation approaches and to measurements. It appears that SystemC-AMS allows a good compromise between modeling accuracy and simulation execution-time speed. Moreover, the modeled RF front-end...
This paper addresses the generation of enhanced models of digital ICs. The proposed models accurately represent the effects of the fluctuations of the device port signals induced by EM disturbances coupling to the system interconnect. The models can be easily estimated from the device port transient responses and can be effectively implemented in any commercial tool as SPICE subcircuits. Model accuracy...
This paper reports the design considerations, simulation results and test specifications of an S-band, 70 MHz bandwidth, 50 kW average power klystron, which was developed by the Institute of Electronics, Chinese Academy of Sciences (IECAS) before August, 2007. The representative result is 56 kW average output power under the conditions of 89 mus RF pulse width, 300 Hz repetition rate, and continuous...
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