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This paper presents a compact bandpass filter based on stacked eighth-mode substrate integrated waveguide (EMSIW) resonators. By properly constructing the feeding and coupling topology of four EMSIW cavities, the proposed filter not only exhibits compact size, but also achieves enhanced selectivity by virtue of its three transmission zeros (TZs). A novel cross-coupled structure which contributes to...
This paper presents a novel filter based on an air-filled substrate integrated waveguide (SIW) cavity resonator. This structure is inspired by the air-filled SIW, recently proposed to realize integrated interconnects with reduces losses. The proposed resonant cavity allows introducing two poles and two transmission zeros in the frequency response of the filter. The size and position of the air-filled...
A dual and triple band bandpass filter is designed operating at X and Ku-band. Based on pure geometric analysis of width to length ratio's relationship with modes generated in substrate integrated waveguide cavity, a square substrate integrated waveguide cavity is designed to operate at TE101, TE201, TE102 modes. Coupling matrix for passband is derived based on coupling topology from the resonating...
In this article, a way to design a quadruple-mode bandpass SIW filter with single circular cavity has been investigated. The proposed filter is implemented using slotting technology and has a simple and symmetrical structure. It focuses on the multiple-mode resonator (MMR) technology to miniaturize the overall size of a wide bandpass filter (BPF). Totally five metallic perturbation via and slots are...
A cavity-resonator-integrated guided-mode resonance filter (CRIGF) is a type of narrowband wavelength filter for an incident free-space beam of small diameter. A CRIGF consists of a grating coupler (GC) and a pair of distributed Bragg reflectors used to construct a waveguide cavity resonator. This time, the dependence of the reflection spectrum on the relative position of the centers of the GC and...
In this paper, we present a new Quarter-Mode Substrate Integrated Waveguide filter (QMSIW). A prototype of the proposed filter operating at 8.88 GHz was simulated under CST Microwave Studio and HFSS software. Return losses represent better than 20dB, while the simulated insertion losses represent 0.4dB. The simulated results of this filter show good agreement, with a size reduction of about 75 and...
A planar cavity is proposed, designed, and implemented with a hybrid substrate integrated waveguide (SIW) and periodically drilled SIW (PDSIW) structure. Air holes are added to synthesize a lower effective permittivity. The periodicity can increase the stored energy and improve the quality factor. The optimal ratio between the two permittivities is investigated. The measured results show that the...
This paper presents a substrate integrated waveguide (SIW) Chebyshev bandpass filter using the low cost, commercially available printed circuit board (PCB) technology. The detailed design procedure beginning from the normalized Chebyshev lowpass filter, to the final optimized SIW bandpass filter is presented. The test filter having a 4% fractional bandwidth centered at 1.684 GHz was fabricated on...
The 0-th shear horizontal (SH0) mode plate wave has an electromechanical coupling factor k2 larger than 50% in a (0°, 120°, 0°) LiNbO3 (LN) plate thinner than 0.1λ, where λ is a pitch of an intergidital transducer (IDT). In the previous study, ultra-wide-band ladder filters composed of cavity type resonators recorded 6 dB bandwidth from 41% to 51% in a digital TV band. However, the structure is fragile,...
A four-pole substrate integrated waveguide (SIW) filter at Ka band is designed for satellite communication systems. The filter contains four SIW cavity resonators which are made of a substrate with metalized via holes. A transmission zero at the low-frequency side of the pass band is produced by the negative coupling that provided by TE102 mode in the second cavity resonator. The selectivity on the...
This paper presents the recent advances in the implementation of substrate integrated waveguide (SIW) components and circuits by additive manufacturing (AM) techniques. The use of AM allows introducing novel features in the design of SIW structures, ranging from fully three-dimensional geometries (impossibly to obtain with standard planar circuits technologies), to the local modification of the dielectric...
In this paper, a novel dual-mode substrate integrated waveguide resonator which is a square SIW cavity perturbed by a rectangle metallic plane inserted into the middle of the substrate. With this type of dual-mode substrate integrated waveguide cavity, a novel fourth-order bandpass filter is presented. The filter was fabricated and measured with high selectivity and compact size, and the size reduction...
The design of a cross-coupled substrate integrated waveguide (SIW) filter with three transmission zeros (TZs) for 28 GHz millimeter wave application is presented in this paper. The filter consists of an oversized cavity and a cascaded triplet (CT). The oversized cavity introduces a TZ in the lower stopband by the cross-coupling between higher/lower order modes. The location of this TZ can be adjusted...
Ultra-wide band ladder filters with bandwidth of 41 to 51%, which fully cover the digital TV band, were fabricated using 0-th shear horizontal (SH0) mode plate wave in a (0°, 117.5–120°, 0°) LiNbO3 (LN) ultra-thin plate. A LN/cavity/Si wafer with a number of devices must be separated into chips as they can be mounted on a printed circuit board (PCB). When the wafer is separated using a dicing machine,...
Two novel bandpass filters (BPFs) with the same structure but different bandwidth are presented in this paper, they are based on multilayered printed circuit boards. In this work, an H-shape coupling slot is used to realize hybrid coupling, two substrate integrated waveguide (SIW) cavities in different layers are used for resonators, and the coplanar waveguide (CPW) in input and output port is used...
A design of Substrate Integrated Waveguide (SIW) diplexer is proposed. The diplexer is formed using two SIW circular cavity resonators designed individually and combined through a T-junction. The circular cavity structure using TM010 mode is employed in the design of this diplexer. To prove the concept, the diplexer is fabricated using Rogers RT5880 with dielectric constant, □r = 2.2 and height of...
A unit based on substrate integrated waveguide (SIW) cavity with folded defected ground structure (FDGS) split-ring resonator (SRR) etched on is introduced. The coupling between the SIW cavity and FDGS leads to two resonant frequencies and one transmission zero. By adjusting the size and the position of the FDGS SRR, both resonant frequencies and transmission zero can be controlled. The flexibility...
A compact wideband filter based on combline structure in Substrate Integrated Waveguide (SIW) technology is presented in this paper. The combline structure contains a grounded post connected to a floating metallic disk and the disk is isolated from the top plate of the SIW cavity through an annular gap. This enables an important reduction of the resonate frequency (f0) of the resonator thus the filter's...
A negative-order cavity resonator (NOCR) using composite right/left-handed (CRLH) ridge substrate integrated waveguide (RSIW) is proposed and applied to the design of coupled-resonator filter. The NOCR is realized using the CRLH RSIW unit cell with two rows of metal walls to form a cavity structure. The CRLH characteristic of this cavity resonator produces the −1st resonance which occurs below the...
This paper proposes a new design concepts for 2-in-1 bandpass filter in millimeter-wave, based on substrate integrated waveguide (SIW) cavities resonators implemented on low temperature co-fired ceramic (LTCC) substrate. Two filters at same center frequency but for different polarizations are integrated and designed using common dual mode cavity resonators in order to reduce the circuit size. Due...
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