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A pure and high-frequency clock reference will benefit the radar transceivers, helping on generating superior chirp signals. Revealed by recent literatures, Lamb-wave resonator is a candidate to provide such a reference. However, reported equivalent-circuit models of Lamb wave resonators are not accurate enough to enable the designs of integrated circuits. This paper discusses necessities of high-frequency...
The advances in semiconductor fabrication technologies have enabled the integration of Lamb-wave resonator on silicon substrate. But such integration has led to additional parasitic effects to the Lamb-wave resonators. The availability of an efficient equivalent-circuit model is thus vital. This paper proposes a modified hybrid π-type/Butterworth-Van Dyke (PiBVD) model. Compared to the conventional...
Enhance the efficiency of beam-wave interaction is an important problem in the design of folded waveguide traveling-wave tube (TWT) amplifier. A dielectric-loaded tapered folded waveguides was studied, whose equivalent circuit analysis is mainly introduced in this paper.
A novel compact model based on 2-π architecture for millimeter wave circuits on-chip transformer is presented. The model is validated through experimental data of IBM 130-nm RF-CMOS transformer. A MATLAB program has been developed to implement the modeling technique using semi-analytical extraction method which is convenient to calculate the particular parameters. The model accuracy is demonstrated...
This paper focuses on investigating and modelling the impact of dummy fills on the performance of CMOS spiral inductors. A modified π-Model is proposed to account the dummy effect. A spiral inductor is fabricated on 9-metal 65nm CMOS technology. Dummy effect is evaluated through comparisons on parameter values in equivalent circuit model. Experiment shows the modified π-Model provides proper characterization...
The extended interaction oscillator (EIO) is regarded as a novel type of high power terahertz (THz) source, which has promising application prospects in radar, medical imaging etc. Up to now, CPI and other institutes have developed many types of EIO. For satisfying with the application request, the EIO with operation frequency exceeding 300GHz is designed and studied with three-dimensional particle-in-cell...
The extended interaction oscillator (EIO) is regarded as a novel type of high power terahertz (THz) source, which has promising applications prospects in military radar, medical imaging and wireless communications, etc. For being satisfied with the widely applications, a THz EIO operation at G-band is designed and studied with three-dimensional particle-in-cell simulation at IECAS. To improve the...
With the increasing application of electrical and power electronic equipments, there are more and more power quality problems due to the special loads applied to the power grid even the whole power system. A definition for the Pulsed Power Load is advanced, and 3 types of circuit structure model of pulsed power load are devised with the analysis of its fundamental, among which the differences of modeling...
A sheet-beam Extended Interaction Klystron (SBEIK) is an attractive MMW amplifier because of its high gain per unit length and compact configuration. The output cavity is an important part of the whole tube, which is used for RF power extraction. In this paper, multi-gap extended output cavity designs of SBEIK are presented by 3D simulations, RF parameters have been calculated. Beam wave interaction...
The multi-source information processing board is given based on PCI-E bus in the paper, which is often used to collect and process the output data of multi-source photoelectric sensor in real time. This paper describes the process of the system development in detail, gives the program of algorithm simulation used to realize the information fusion and image processing, especially introduces the design...
Parasitic mode suppression was studied by the electromagnetic theory. The method of increasing the frequency interval (FI) between operating mode and parasitic mode was proposed to suppress the unwanted mode. In order to increase FI, a pair of metal rings (MR) is installed in the coaxial resonator operating at high-order-mode for multi-beam klystron (MBK). A TM310 mode coaxial resonator has been manufactured...
A coaxial output cavity with reentrant ring and short circuit pole for multiple-beam klystron (MBK) is presented, which can increase the frequency interval between operating mode TM310 and neighboring modes to more than 1.0 GHz in X-band, diminish the external Q-factor from 535.4 to 202.2, and make the field distribution of TM310 mode symmetrical enough. The simulation results are obtained by CST-MWS.
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