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In this paper, a new switchable absorptive bandstop to bandpass filter using dual mode ring resonator is presented. This switchable filter provides two modes of operation which is absorptive bandstop and bandpass response. The first part of this paper presents a theoretical analysis of the absorptive bandstop dual mode ring resonator based on two low-Q lossy resonators topology. The operating frequency...
Electronically switchable microwave filters are significant in increasing the capability of wireless communication and cognitive radios which is making them highly considerable for research and development. This paper describes and delves into the design of novel microwave switchable band-stop to bandpass filters. The filter is composed of stepped impedance resonators and can be switched to exhibit...
In electrical vehicles (EVs), the DC/DC converter is needed to interface high voltage power battery with 12 V electrical system. The converter is required to adapt the wide range input voltage as well as low-voltage high-current output. Moreover, the converter needs high efficiency and high power density. This paper investigates a two-stage converter with high efficiency including two-phase interleaved...
An absorptive Single Pole Double Throw (SPDT) switch using cascaded switchable parallel-coupled stub resonator and switchable radial stub resonator is proposed in this paper. By using mathematical model, theories of the switchable resonators are discussed. The switchable resonators are reconfigured between bandstop and allpass response in the absorptive SPDT switch design. The allpass response is...
This paper discusses the potential application of switchable matched parallel-coupled stub resonator for isolation improvement of Single Pole Double Throw (SPDT) discrete switch in wireless communication system. In addition, an absorptive SPDT switch also can be obtained by the use of the matched resonator. Frequency spectrum at 2.010–2.025 GHz band for TD-SCDMA is chosen to demonstrate this technique...
Generally, if using single low performance discrete PIN diode, it is difficult to get high isolation of Single Pole Double Throw (SPDT) switch at 2 GHz band. The PIN diodes are usually packaged in a standard package such as SOT23, SOT323, SOD323 or SOD523. Therefore, this paper proposed single switchable open stub resonator for isolation improvement of shunt SPDT discrete PIN diode switch for Time...
In this paper an investigation of band-stop to all pass electronically reconfigurable filters that can utilize the same set of coupled resonators and switch the ideal pin diode to change between different modes of operation have been introduced. This filter is designed for this research and its main focus is to investigate, analyze, simulate and discuss on the proposed method using MATLAB®. The theoretical...
This paper demonstrates a reconfigurable matched bandstop filter. The filter is based on a lossy allpass network. The lossy allpass network demonstrates the concept and design of perfectly matched bandstop response with a perfect matched at all frequencies. The filter is based on the half-wavelength λ over 2 resonator with gap coupling, parallel with an allpass nominally-90°-phase-shift element, which...
The paper describes an investigation of inverter fault-tolerant vector control for permanent-magnet synchronous motor (PMSM) driven by a fault-tolerant inverter. The inverter is a topology-modified inverter with fault-tolerant capability, which can be configured as the standard 3-phase 6-switch inverter under the inverter health condition and reconfigured as 3-phase 4-switch inverter under the inverter...
A new class of reconfigurable bandpass filter based on parallel-coupled switched delay line approach is presented in this paper. The approach allows both center frequency and passband bandwidth to be reconfigured electronically. In contrast to conventional approach, the effects of the switch losses are relatively insignificant and can be treated as an auxiliary effect and therefore the filter has...
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