This work presents a new method for enhancing the performance of dual band Planer Inverted-F Antenna (PIFA) and its lumped equivalent circuit formulation. The PIFA in terms return loss, bandwidth, gain, efficiency is improved with addition proposed open stub radiating element without disturbing operating resonance frequencies antenna. In specific cases, various simulated fabricated models illustrate that values antennas longer optimum lengths can be enhanced up to 4.6 dB, 17%, 1.8 dBi, 12.4%...

In this paper, a coplanar symmetrical meander line structure is presented, and an equivalent circuit model proposed to allow estimation of its electrical characteristics based on numerical modeling. The parasitic couplings in the are considerably different from those simple with ground below it. Analysis derivation inductive capacitive resistance effective frequency band addressed detail, effects geometrical parameters also demonstrated. validity verified by both commercial electromagnetic...

In this article, a high-power, high-efficiency inverted Doherty power amplifier (PA), having more compact load network than that of the conventional amplifier, was designed and implemented for wide-band code-division multiple access (WCDMA) base-station applications. Its configuration working principle are compared with amplifier. For experimental verification, we an using 190 W peak-envelope-power (PEP) laterally diffused metal-oxide-semiconductor (LDMOS) field-effect transistors (FETs)....

This paper presents 3-D optimal shape design method of ferromagnetic pole pieces for magnetic resonance imaging (MRI) devices open permanent magnet type. The is based on a continuum sensitivity analysis in conjunction with the boundary integral equation (BIEM). poles an assembly are designed by proposed and conventional shimming method. Magnetic field strength, ppm order homogeneity working space volume compared between one.

An efficient measurement methodology is proposed to construct the scattering parameters of a multi-port device using four-port vector network analyzer (VNA) without external un-terminated ports. By VNA, reflected waves from ports could be minimized. The method significantly enhances accuracy S-parameters with less number measurements compared results classical renormalization technique which uses twoport VNA. validated measured data coupled 8-port micro-strip lines.

This paper suggests a novel efficient interconnect failure diagnosis method, which is dubbed as "time of propagation delay pass fail (TPDPF)," employing time domain reflectometry (TDR). The proposed TPDPF has been applied to diagnose the failures in high parallelism probe card with TDR function automatic test equipment (ATE), exclusively used calibrating channel length skews. It shown that method could be very help short-end fixture (a metal wafer), also this paper. To check validity an...

As the available space in board of a mobile device becomes smaller and more compact, circuit elements transmission lines are arranged very close proximity, especially from antennas which usually installed on same board. Due to various on-board designed small space, electromagnetically interfered, resulting performance degradation circuit. So engineers designers should find least interfered place for components minimize electromagnetic interferences. This paper discusses presents methodology...

An imbalance difference model has been developed to estimate the common-mode radiated emission of a PCB with an attached cable. This model, however, requires significant computation time for full-wave simulation, especially if cable is long, even powerful computer configuration. To solve this problem, method that approximates as equivalent asymmetrical dipole antenna proposed in paper. The can be predicted using line integration current distribution which directly estimated by model. Unlike...

In this paper, the authors present an efficient design method for high efficiency class-F amplifiers considering active devices with internal parasitic components. Considering drain current/voltage waveforms observed at current source of transistor, harmonics control and fundamental matching circuits are optimized to have higher power-added (PAE). Two 1.2GHz were designed using a large-signal model LDMOSFET: one had external another them waveforms. Simulation two different output networks...

This paper predicts electromagnetic susceptibility (EMS) of integrated circuits (ICs) with novel consideration complex power distribution network (PDN). For accurate simulation performance, the set-up model is derived in detail, especially PDN. PDN extracted from physical configuration and also view function system to express ground bounce exactly since it a pivot factor DPI test for EMS. After measurement, comparison result applied validate proposed estimate ICs.

As system integration in wireless portable electronic devices has increased significantly, the analysis of electromagnetic compatibility (EMC) become important to prevent malfunction integrated circuits (ICs). To evaluate radiative immunity an circuit, we employ IEC-standardized IC stripline method. In this paper, provide radiated noise coupling from a ring voltage-controlled oscillator (VCO). We present design that meets IEC 62132-8 standard, test setup and experimental results VCO chip....

Integrated circuits suffer from interference in frequency multibands real scenarios, and this susceptibility allows them to easily malfunction. In article, a novel miniature coplanar filter package enhance the immunity of integrated is proposed. The structure can avoid cost issues multilayers also be implemented substrate or interposer package, flexible/foldable board, with normal fabrication process. Analysis filtering characteristics design method required stop bands are demonstrated...

This paper proposes a novel electrical characterization approach for high-performance package system using an improved Partial Element Equivalent Circuit (PEEC). As the effect of interconnects becomes pivotal factor performance high-speed electronic systems, there is great demand accurate equivalent model interconnects. In particular, established in this Fine-Pitch Ball Grid Array (FBGA) PEEC method. Based on model, characteristics are analyzed; furthermore, these verified through...

This paper proposes novel mixed-mode S-parameters, which are dubbed as "extended S-parameters." The extended S-parameters were applied to three-conductor transmission lines, resulting in the independent differential and common modes using current division factor of lines. By contrast conventional S -parameters, there no cross-mode even asymmetrical conductor In addition, two new mode conversion matrices, contain factor, also proposed convert -parameters standard S-parameters. validity method...

In this paper, a modeling method for predicting the conducted emission with current probe is presented motor-drive braking system. The proposed model considers motor driving circuit components and measurement environment. models of component include PWM inverter circuits, 3-phase motor, PCB, heatsink, bus bars, casing. environment involve probe, test table including ground plane, harness cable, LISN. To reflect accurate path common differential mode drive system, co-simulation equivalent...

The bulk current injection (BCI) and direct power (DPI) method have been established as the standards for electromagnetic susceptibility (EMS) test. Because BCI test uses a probe to inject magnetically coupled (EM) noise, there is significant difference between supplied by radio frequency (RF) generator that transferred integrated circuit (IC). Thus, immunity estimated forward cannot show of IC itself. This paper derives real injected at failure point using transfer efficiency method. We...

This article proposes an efficient model to reduce the conducted emission in a motor-driven autonomous emergency braking system. Many X/Y decoupling capacitors have been employed this system repress switching noises, which is very important consideration for reliability/safety of However, locations capacitors, basically determined, thus, far by trial and error. The proposed model, article, consists circuit permanent magnet synchronous combined with electromagnetic simulation models, whole...

An equivalent model has been developed to estimate the electromagnetic immunity for integrated circuits under a complex environment. The complete is based on characteristics of equipment and physical configuration device test (DUT) describes measurement setup as well target test, corresponding package, specially designed printed circuit board. advantage proposed that it can be applied SPICE-like simulator easily achieved without costly time-consuming measurements. After simulation,...