Journal ArticleDOI
Compact lowpass filter with wide stopband using coupled rhombic stubs
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In this article, a compact and high selective lowpass filter with wide stopband using coupled rhombic stubs is presented, where a folded three-element LPF is proposed to achieve compact size and high selectivity.Abstract:
A compact and high selective lowpass filter (LPF) with wide stopband is presented using coupled rhombic stubs. The proposed LPF unit is constructed by loading a rhombic stub on a transmission line. Then, a folded three-element LPF is proposed to achieve compact size and high selectivity by introducing coupling between adjacent rhombic stubs. The operating mechanism of the filter is investigated and explained, by adopting the physically-based LC-equivalent circuit model. The implemented final LPF exhibits a wide stopband of up to 11.5 f c with a rejection level of better than 35 dB. Furthermore, the final LPF features a compact size of 0.12λ g × 0.10λ g, where λ g is the guide wavelength of f c, and a very high figure-of-merit (FOM) of 27 142.read more
Citations
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Journal ArticleDOI
A compact lowpass filter for satellite communication systems based on transfer function analysis
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TL;DR: This paper presents a straightforward design procedure to achieve some of the best performance of this class of microstrip filters, composed of three different polygonal-shaped resonators, two of which are responsible for stopband improvement and one of which is designed to enhance the selectivity of the filter.
Journal ArticleDOI
Compact Hexagonal Shape Elliptical Low Pass Filter With Wide Stop Band
Lalit Kumar,Manoj Singh Parihar +1 more
TL;DR: In this article, a new hexagonal shape compact elliptical low pass filter (LPF) is introduced to improve and extend the stop band, two additional transmission zeros are created by introducing three semi-circular slots in the ground plane.
Journal ArticleDOI
Design of a low pass filter using rhombus-shaped resonators with an analyticalLC equivalent circuit
TL;DR: A new method is presented to design of low pass filter (LPF), based on LC equivalent circuit of rhombus shaped resonator, with obtained return loss and insertion loss in the pass band are 16 dB and 8 0.1 dB.
Journal ArticleDOI
Design of microstrip wide stopband lowpass filter with lumped equivalent circuit
TL;DR: In this article, a microstrip lowpass filter using stepped impedance resonator hexangular unit is presented, which has some appropriate features such as compact size, low insertion loss and wide stopband.
References
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Journal ArticleDOI
Sharp Roll-Off Lowpass Filter With Wide Stopband Using Stub-Loaded Coupled-Line Hairpin Unit
TL;DR: In this article, a novel application of shunt open-stubs at the feed points of a center fed coupled-line hairpin resonator is presented for the design of compact lowpass filter (LPF) with very wide stopband.
Journal ArticleDOI
New Ultra-Wide Stopband Low-Pass Filter Using Transformed Radial Stubs
Kaixue Ma,Kiat Seng Yeo +1 more
TL;DR: In this article, a new type of low-pass filter with ultra-wide band rejection and compact size by using a proposed transformed radial stubs (TRSs) is introduced and investigated.
Journal ArticleDOI
Compact Lowpass Filters With Sharp and Expanded Stopband Using Stepped Impedance Hairpin Units
Lin Li,Zheng-Fan Li,Jun-Fa Mao +2 more
TL;DR: In this article, a compact lowpass filter with two transmission zeros is presented, which can be adjusted easily to obtain a larger zero separation without the need to change the stepped-impedance unit.
Journal ArticleDOI
Design of compact microstrip lowpass filter with ultra-wide stopband
TL;DR: In this paper, a microstrip lowpass filter with compact size and an ultra-wide stopband is proposed, which can suppress the sixteenth harmonic response referred to a suppression degree of 15'dB.
Journal ArticleDOI
Realisation of highly compact planar lowpass filter for UWB RFID applications
Milad Mirzaee,Bal Singh Virdee +1 more
TL;DR: In this paper, a microstrip low-pass filter was proposed that exhibits an quasi-elliptical function response with high out-of-band rejection for integration in ultra-wideband (UWB) chipless RFID receivers.
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