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Differential Bandpass Filters Based on Dumbbell-Shaped Defected Ground Resonators
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This letter presents a dumbbell-shaped defected ground resonator and its application in the design of differential filters. The operation principle of the dumbbell-shaped resonator (DSR) coupled to differential microstrip lines is studied through a circuit model analysis. The proposed circuit model...

Wideband Bandpass Filter With Extremely Wide Upper Stopband
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

The realization of planar wideband bandpass filters with an extremely wide upper stopband is described. The filter design differs from conventional approaches in which it is based on the choice of a wideband bandstop (BS) filter, to which a number of shunt-shorted stubs are connected at...

Trisection Bandpass Filters With All Mixed Couplings
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In this letter, new patterns of symmetric trisection bandpass filters (BPFs) of two types with all mixed couplings are discussed. The condition under which the first-type filter with a central reflection-type resonator transforms into a delay line filter is considered. A second-type filter...

Maritime Surveillance With Undersampled SAR
2017 Edition, Volume 14, August 1, 2017 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

According to the minimum antenna area constraint, synthetic aperture radar (SAR) systems require a low-pulse repetition frequency (PRF) to image the wide swaths in ocean surface monitoring scenarios. However, the low PRF that is lower than the Doppler bandwidth will cause azimuth ambiguities. This...

Training Deep Learning Based Image Denoisers From Undersampled Measurements Without Ground Truth and Without Image Prior
2019 Edition, June 1, 2019 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Compressive sensing is a method to recover the original image from undersampled measurements. In order to overcome the ill-posedness of this inverse problem, image priors are used such as sparsity, minimal total-variation, or self-similarity of images. Recently, deep learning based...

Lowpass-Bandpass Triplexer Integrated Switch Design Using Common Lumped-Element Triple-Resonance Resonator Technique
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper presents a lowpass-bandpass triplexer integrated switch using common lumped-element triple-resonance resonator (LE-TRR) technique. Firstly, a lowpass-bandpass triplexer which has one lowpass channel (LPC) and two bandpass channels (BPCs) is designed. The proposed...

Telescopes Alignment Using the Sharpness Function Method Based on Undersampled Images
2019 Edition, Volume 11, February 1, 2019 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In astronomy, the images are sometimes undersampled. In the previous research works, image reconstructions have to be employed to recover the lost information from a set of undersampled images to achieve a high-resolution image using dithering or drizzle methods, which increase the...

High-Order Input-Reflectionless Bandpass/Bandstop Filters and Multiplexers
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

A coupling-matrix approach for the theoretical design of a type of input-reflectionless RF/microwave bandpass filters (BPFs) and bandstop filters (BSFs) is presented. They are based on diplexer architectures with arbitrary-order bandpass and bandstop filtering channels...

Novel Absorptive Balanced Bandpass Filters Using Resistive Loaded Transmission Lines
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper reports on design of novel balanced bandpass filters using quarter-wavelength stub resonators. For the design purposes, differential-mode (DM) and common-mode (CM) half equivalanet circuits are established and analyzed carefully. In this work, CM noise is introduced into...

Substrate Integrated Plasmonic Waveguide for Microwave Bandpass Filter Applications
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In this paper, we numerically and experimentally demonstrate a substrate integrated plasmonic waveguide (SIPW) concept and its application in microwave bandpass filters. This SIPW consists of double arrays of slots etched on the top and bottom metal layers of a substrate integrated waveguide...

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