A Review on SIW and Its Applications to Microwave Components

Nwajana, Augustine O.; Raymond, Emenike

doi:10.3390/electronics11071160

Cited by 37 publications

(12 citation statements)

References 101 publications

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“…Finally, the SIW microwave oscillator is achieved due to the low power transmission, miniaturized, narrow bandwidth, high‐quality factor, and SPN. Also, the SIW losses are solved by optimizing the distance between the vias 30 and using a substrate with a low loss tangent 31 . The performance of these X‐band GaAs FET SIW oscillators with other published microwave SIW oscillators are compared which is illustrated in Table 2.…”

Section: Resultsmentioning

confidence: 99%

Planar substrate integrated waveguide‐based resonators and its usage to compact X‐band small phase noise oscillator

Varcheh

Rezaei

Kiani

2022

Micro & Optical Tech Letters

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This study denotes a procedure of a small phase noise (SPN) oscillator employing three different substrate integrated waveguide (SIW) resonators as a frequency stabilization‐component. The SIW resonator as modifying phase noise (PN) is investigated and branchline coupler in the feedback loop is presented. The design technique to attain SPN usage for optimized efficiency is proposed. Then, three different X‐band SIW oscillators using a packaged GaAs FET transistor are planned. Due to the PN and compacting, the miniaturized conventional SIW (MCSIW) oscillator is selected. This MCSIW oscillator operates at 8.15 GHz, mentions a PN of −169 dBc/Hz at 1‐MHz frequency‐offset.

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Section: Resultsmentioning

confidence: 99%

Planar substrate integrated waveguide‐based resonators and its usage to compact X‐band small phase noise oscillator

Varcheh

Rezaei

Kiani

2022

Micro & Optical Tech Letters

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Section: Introductionmentioning

confidence: 99%

“…Bandpass filters have been extensively researched and described in the literature [ 17 , 18 , 19 , 20 , 21 , 22 , 23 ]. This type of filter has wide applications in wireless communications, particularly in wireless transmitters and receivers [ 19 ]. In the transmitter, this type of filter is used to restrict the bandwidth of the output signal to the allocated channel for transmission.…”

Section: Introductionmentioning

confidence: 99%

Application of Compact Folded-Arms Square Open-Loop Resonator to Bandpass Filter Design

Nwajana

Raymond²

2023

Micromachines

Self Cite

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Folded-arms square open-loop resonator (FASOLR) is a variant of the conventional microstrip square open-loop resonator (SOLR) that facilitates further device size miniaturization by having the two arms of the conventional SOLR folded inwards. This paper highlights the benefits of this brand of compact SOLR by implementing a five-pole Chebyshev bandpass filter (BPF) using compact FASOLR. The test BPF is presented, with centre frequency of 2.2 GHz, fractional bandwidth of 10%, passband ripple of 0.04321 dB, and return loss of 20 dB. The design is implemented on a Rogers RT/Duroid 6010LM substrate with a dielectric constant of 10.7 and thickness of 1.27 mm. The filter device is manufactured and characterised, with the experimentation results being used to justify the simulation results. The presented measurement and electromagnetic (EM) simulation results demonstrate a good match. The EM simulation responses achieve a minimum insertion loss of 0.8 dB and a very good channel return loss of 22.6 dB. The measurement results, on the other hand, show a minimum insertion loss of 0.9 dB and a return loss of better than 19.2 dB. The filter component has a footprint of 36.08 mm by 6.74 mm (that is, 0.26 λg x 0.05 λg), with λg indicating the guided wavelength for the 50 Ohm microstrip line impedance at the centre frequency of the proposed fifth-order bandpass filter.

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“…In this context, in order to reduce losses in high frequency bands, various improved technologies have emerged in the last two decades such as substrate integrated waveguide [4] and gap waveguide [5]. We are going to focus on the gap waveguide technology that in some applications can offer important advantages to integrate advanced low-loss antenna array systems operating at frequencies above 10 GHz [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Inverted Microstrip Gap Waveguide Coplanar EBG Filter for Antenna Applications

Inclan-Sanchez

2022

Electronics

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The possibility of making compact stopband filters using coplanar-coupled EBG resonators in inverted microstrip gap waveguide technology is studied in this work. To do this, the filtering characteristics of different configurations of mushroom-type elements are shown in which the short-circuit element is placed on the edge of the resonator’s patch. The behavior of the structure as well as its main advantages such as: low losses, self-packaging, low level of complexity, flexibility and easy design are illustrated in the paper. To evaluate the possibility of integrating these structures in gap waveguide planar antennas feeding networks, a 5-cell EBG filter was designed and built at the X band. The proposed filter reached a maximum rejection level of −35.4 dB, had a stopband centered at 9 GHz and a relative fractional bandwidth below −20 dB of 10.6%. The new compact filter presented a flat passband in which it was well matched and had low insertion losses that, including the connectors, were close to 1.5 dB in most of the band. These results are enough to improve low-complexity future antenna designs with filter functionalities in this technology.

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A Review on SIW and Its Applications to Microwave Components

Cited by 37 publications

References 101 publications

Planar substrate integrated waveguide‐based resonators and its usage to compact X‐band small phase noise oscillator

Planar substrate integrated waveguide‐based resonators and its usage to compact X‐band small phase noise oscillator

Application of Compact Folded-Arms Square Open-Loop Resonator to Bandpass Filter Design

Inverted Microstrip Gap Waveguide Coplanar EBG Filter for Antenna Applications

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