Substrate Integrated Waveguide Multi-Channel Filtering Crossover With Extended Channel Number and Controllable Frequencies

Micro & Optical Tech Letters

et al. 2021

A compact filtering crossover utilizing substrate integrated waveguide (SIW) quintuple-mode resonator (QMR) technology is proposed for the first time. Benefiting from this technology, the proposed crossover firstly breaks the status quo that SIW crossover filtering response is only concentrated in single passband, thereby extending the applications of the SIW crossovers. In design, the QMR is derived by embedding metal-via holes in the conventional SIW resonant cavity, thus to produce quintuple resonant modes featuring with specific electric distributions. Next, by dividing these modes into two groups, a triple-mode bandpass filter (BPF) channel and a single-mode dualband BPF channel are both realized. To implement two flat passband channels, there are two SIW cavities cascaded. And also, the isolation between two channels is implemented by employing the orthogonal characteristic. In this way, a crossover is implemented. The proposed design method can be a good candidate for developing SIW multi-band filtering crossovers. For verification, an example circuit has been designed, fabricated, and measured.

Section: Introductionmentioning

confidence: 98%

Compact filtering crossover design based on SIW quintuple‐mode resonators

Zhang

Jing

Micro & Optical Tech Letters

et al. 2021

“…Nevertheless, few works have been proposed to realize crossovers in SIW technology, which are able to make two bandpass filters (BPFs) and crossovers coexist in one system [6]- [8]. The most popular approach is to cascade multiple SIW cavities simultaneously to construct two multi-order channel BPFs, and use dual-mode SIW cavities' modal orthogonality in the intersecting cavity to conduct crossovers, thus allowing two BPFs cross each other while remaining high isolation [6]- [8]. For instance, in [6], a planar crossover is composed of five identical dual-mode cavities for two triple-order channel BPFs, and the TE102 and TE201 modes in the intersecting cavity are utilized for isolation.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, in [6], a planar crossover is composed of five identical dual-mode cavities for two triple-order channel BPFs, and the TE102 and TE201 modes in the intersecting cavity are utilized for isolation. Moreover, to introduce additional inherent characteristics, the cavities can be stacked according to different topologies to improve crossovers [7]- [8]. In [7], seven dual-mode SIW cavities are cascaded to realize a SIW crossover, and stacked in a non-planar structure to introduce common mode rejection characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…In [7], seven dual-mode SIW cavities are cascaded to realize a SIW crossover, and stacked in a non-planar structure to introduce common mode rejection characteristics. In [8], a sixchannel crossover is presented based on six SIW dual-mode resonant cavities with controllable frequencies. However, the SIW crossovers presented in these reports focus on circuit implementation, but ignore their large-scale structures, which is because the whole circuit realization is dependent on the application of dual-mode resonators, but is limited by it.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design of Filtering Crossover and Diplexer on SIW Quadruple-Mode Resonators in a Single Cavity

Zhang

et al. 2020

IEEE Access

This paper at first presents the proposal and design of a filtering crossover and diplexer with two second-order filtering channels on substrate integrated waveguide (SIW) quadruple-mode resonators (QMRs) and in a respective single cavity. The proposed method has an interesting application in the overall size miniaturization design. The proposed resonator is yielded with four perturbed modes, TE103, TE104, TE201 and TE202, and featuring distinct electric field distribution, by inserting metal via-holes in the center of a rectangular SIW cavity. Next, a pair of resonances is applied to form a second-order channel filter while TE201 and TE202 modes are implemented to realize the other, thereby integrating the whole circuit in a single cavity. Besides, the transmission responses between the channels are isolated only by the perturbed via-holes. Slots are introduced in the metal surface to further increase each channel design flexibility. In this way, controllable frequencies and compact size have been well achieved. Two examples including a diplexer and crossover with two second-order channels are designed, fabricated, and measured to verify. Good agreement between simulation and measurement can be observed. INDEX TERMS Crossover, diplexer, quadruple-mode resonator (QMR), single cavity, substrate integrated waveguide (SIW).

“…Bandpass filters (BPFs) based on substrate integrated waveguide (SIW) have been widely researched and used in communication systems for their advantages of having highquality factor, low cost, lightweight and high-power handling capability [1][2][3][4][5][6]. Moreover, balanced BPFs have the advantage of common (CM) suppression capability, which results in a superior immunity against hostile environmental noise when compared with unbalanced counterparts [3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Balanced substrate integrated waveguide filters with controllable finite transmission zeros

IET Microwaves Antenna & Prop

et al. 2020

This article presents a design method for balanced substrate integrated waveguide (SIW) filters with controllable finite transmission zeros (FTZs). The balanced SIW filters are designed by combining one dual‐mode and four single‐mode SIW cavities. Characteristics of the proposed balanced SIW filters without and with cross‐coupling path are analysed in detail. The proposed balanced SIW filters can realize one or two controllable FTZs. Based on the characteristic of dual‐mode SIW cavity, good performance of common mode suppression can also be achieved. For the demonstration, some design examples with the centre frequency of 12.5 GHz are presented, and two design examples are fabricated to verify the performance of the proposed balanced SIW filters and the design method.