Journal ArticleDOI
A Substrate Integrated Waveguide (SIW) Bandpass Filter in A Box Configuration With Frequency-Dependent Coupling
TLDR
In this article, a microwave bandpass filter with frequency-dependent coupling implemented in substrate integrated waveguide (SIW) technology is presented, which implements a four-pole generalized Chebyshev filtering function with two transmission zeros.Abstract:
This letter presents the design of a microwave bandpass filter with frequency-dependent coupling implemented in substrate integrated waveguide (SIW) technology. The proposed filter implements a four-pole generalized Chebyshev filtering function with two transmission zeros. Resonators are arranged in an extended box configuration with dispersive coupling on a main signal path, which produces an extra zero in comparison to classical approaches. The frequency-dependent coupling is implemented as a shorted stub with an additional septum made from via-holes. Such modification allows better control of the positions of the resonant frequencies of coupled SIW cavities, as well as of the position of the transmission zero. The filter was fabricated in SIW technology and good agreement was achieved between the simulated results and those measured.read more
Citations
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Journal ArticleDOI
Miniaturized Dual-Band SIW Filters Using E-Shaped Slotlines With Controllable Center Frequencies
Hao Zhang,Wei Kang,Wen Wu +2 more
TL;DR: In this paper, a simple method for miniaturized dual-band bandpass filters (BPFs) through E-shaped slotlines has been proposed, where slotlines are etched on the edge sides of the substrate-integrated waveguide (SIW) cavities coupled with magnetic fields of the resonant modes, which makes the proposed cavity operate below its fundamental resonant frequency.
Journal ArticleDOI
Synthesis of Cross-Coupled Filters With Frequency-Dependent Couplings
TL;DR: In this paper, the authors present a novel synthesis technique for coupled-resonator filters with frequency-dependent couplings, which is not based on the optimization of a network with assigned topology, but it consists in the explicit synthesis of a folded prototype with frequencydependent transversal couplings.
Journal ArticleDOI
Coupled-Resonator Waveguide Filter in Quadruplet Topology With Frequency-Dependent Coupling – A Design Based on Coupling Matrix
TL;DR: In this article, a coupled-cavity bandpass filter with a four-pole generalized Chebyshev filter with three transmission zeros is proposed, where the frequency-dependent coupling was realized via a rectangular waveguide iris with an incomplete height conducting post.
Journal ArticleDOI
Electric Coupling Structure of Substrate Integrated Waveguide (SIW) for the Application of 140-GHz Bandpass Filter on LTCC
TL;DR: In this article, the propagation constants of two different types of electromagnetic bandgap (EBG) units are discussed and compared for their passbands and stopbands performance, and the measured insertion losses at 40 GHz and 140 GHz are 0.72 and 1.913 dB, respectively.
Journal ArticleDOI
A Trisection Filter Design With Negative Slope of Frequency-Dependent Crosscoupling Implemented in Substrate Integrated Waveguide (SIW)
TL;DR: In this paper, a microwave bandpass filter in a triplet configuration with a frequency-dependent crosscoupling implemented in substrate integrated waveguide (SIW) is presented. But the authors focus on the implementation of two transmission zeros on the upper stopband.
References
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Book
Microwave Filters for Communication Systems: Fundamentals, Design and Applications
TL;DR: Radio Frequency Filter Networks for Wireless Communications-The System Perspective and Computer-Aided Synthesis of Characteristic Polynomials shows the impact of system design on the requirements of filter networks.
Journal ArticleDOI
Advanced coupling matrix synthesis techniques for microwave filters
TL;DR: In this article, a general method is presented for the synthesis of the folded-configuration coupling matrix for Chebyshev or other filtering functions of the most general kind, including the fully canonical case, i.e., N prescribed finite position transmission zeros in an Nth-degree network.
Journal ArticleDOI
Substrate Integrated Waveguide Cross-Coupled Filter With Negative Coupling Structure
Xiao-Ping Chen,Ke Wu +1 more
TL;DR: In this article, a planar negative coupling scheme including a magnetic coupling post-wall iris and a balanced microstrip line with a pair of metallic via-holes is studied in detail.
Journal ArticleDOI
Synthesis of advanced microwave filters without diagonal cross-couplings
TL;DR: In this paper, the authors introduce the methods for the synthesis of two novel filter network configurations which do not require diagonal couplings, but which nonetheless are able to realize asymmetric filtering functions.
Journal ArticleDOI
Substrate Integrated Waveguide Loaded by Complementary Split-Ring Resonators for Miniaturized Diplexer Design
Yuandan Dong,Tatsuo Itoh +1 more
TL;DR: In this article, a planar diplexer based on the substrate integrated waveguide (SIW) with complementary split-ring resonators (CSRRs) etched on the waveguide surface is developed.