Miniaturization Trends in Substrate Integrated Waveguide (SIW) Filters: A Review

Iqbal, Amjad; Tiang, Jun Jiat; Wong, Sew Kin; Alibakhshikenari, Mohammad; Falcone, Francisco; Limiti, Ernesto

doi:10.1109/access.2020.3044088

Cited by 47 publications

(25 citation statements)

References 75 publications

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“…Moreover, the dual-mode operation is possible with these antennas without the need of multiplexer circuits [8]. Recently, substrate integrated waveguide (SIW) technology is considered as a suitable candidate for high quality factor, high gain, and unidirectional radiation pattern [9]. This technology maintains the privileges of the 3-D structures, which make it suitable for the integration with different planar circuits [8], [10].…”

Section: Introductionmentioning

confidence: 99%

Ultracompact Quarter-Mode Substrate Integrated Waveguide Self-Diplexing Antenna

Iqbal

Al‐Hasan

Mabrouk

et al. 2021

Antennas Wirel. Propag. Lett.

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A highly compact substrate integrated waveguide (SIW) self-diplexing antenna, operating at wireless local area network bands (3.6 and 5.4 GHz), is proposed in this letter. The proposed antenna consists of two closely placed (0.022λ g , where λ g is the guided wavelength at 3.6 GHz) quarter-mode SIW resonators, exited by two coaxial probes. Two rectangular slots are added to the closed-ends of each resonator to generate additional capacitances. Therefore, both resonators operate below their fundamental frequencies, and hence, miniaturization is achieved. Moreover, a reliable circuit model is developed to validate the design process. The proposed antenna has ultracompact dimensions of 0.08λ 2 g with simulated gains of 4.9 and 5.34 dBi at 3.6 and 5.4 GHz, respectively. In addition, the simulated isolation levels are 32.5 and 36.6 dB at the lower and higher resonant bands, respectively. Furthermore, both resonant frequencies can be independently controlled by changing the length of the capacitive slots. Due to its compactness, independent resonance control and high isolation, the proposed antenna is suitable for compact and planar radio frequency components.

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Section: Introductionmentioning

confidence: 99%

Ultracompact Quarter-Mode Substrate Integrated Waveguide Self-Diplexing Antenna

Iqbal

Al‐Hasan

Mabrouk

et al. 2021

Antennas Wirel. Propag. Lett.

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“…Planar structure like substrate integrated waveguides (SIWs) become popular to the research community due to its ease of fabrication, low loss, and higher power handling capability. 5 LWA is a fast wave antenna containing complex propagation constant. Uniform LWAs support fast wave.…”

Section: Introductionmentioning

confidence: 99%

Substrate integrated waveguide leaky wave antenna using longitudinal slots for seamless wide angle scanning with enhanced gain

Ranjan

Ghosh

2021

Int J RF Microw Comput Aided Eng

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In this article, a substrate integrated waveguide (SIW) based double longitudinal slots loaded leaky wave antenna (LWA) is presented. Unit cell of the proposed antenna consists of two longitudinal slots with quarter wavelength distance apart from each other for impedance matching at broadside frequency, providing suppressed open-stop band and seamless scanning. Both the slots participate in radiation resulting higher gain. Novelty of the design lies in using two longitudinal slots per unit cell to get higher gain and optimum design to provide wide angle scanning. Dispersion diagram and equivalent electrical circuit have been used to get insight of the behavior of the unit cell. An array of 19 such unit cell of length 11 λ 0 (λ 0 wavelength corresponds to lowest operating frequency) is used to realize the LWA. The proposed antenna can scan seamlessly from backward to forward direction through broadside with enhanced gain. The antenna can scan 84 0 (from À64 0 to 20 0 ) with a maximum gain of 16.5 dB and minimum radiation efficiency 66% in the frequency range 10.5 to 17.5 GHz. Finally, a prototype is fabricated, and measurements are done to verify the antenna performances.

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“…However, a traditional full‐mode SIW resonant cavity occupies comparatively huge space especially at sub‐6 GHz frequency band. Several effective approaches have been employed to decrease the dimensions 18 . Half‐mode SIW (HMSIW) resonant cavity is established by cutting the resonant cavity along its center‐symmetrical plane 19,20 .…”

Section: Introductionmentioning

confidence: 99%

Compact filtering power divider using mixed quarter‐ and eighth‐mode substrate integrated waveguide resonant cavities with flexible design

Wang

Zong

2021

Int J RF Mic Comp-Aid Eng

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In this paper, a series of filtering power dividers (FPDs) employing quarter‐mode substrate integrated waveguide (QMSIW) and eighth‐mode substrate integrated waveguide (EMSIW) resonant cavities have been first demonstrated. The proposed prototypes possess the merits of extremely miniaturized dimensions and relatively low insertion loss. Based on the detailed analysis and investigation of electromagnetic features and feeding types corresponding to the miniaturized SIW resonant cavities, two‐order mixed QMSIW and EMSIW FPDs with electric coupling or magnetic coupling topologies are presented. In addition, multi‐layered structures are implemented to decrease the footprints of the FPDs further. To attain a higher‐order design and enhance the out‐of‐band rejection, a four‐order multi‐layered FPD with cross coupling mechanism is finally developed. For demonstration and verification, seven prototypes of the proposed FPDs operating at 4.8 GHz are meticulously designed, fabricated, and measured. All experimental results are in reasonable agreement with the simulated ones.

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Miniaturization Trends in Substrate Integrated Waveguide (SIW) Filters: A Review

Cited by 47 publications

References 75 publications

Ultracompact Quarter-Mode Substrate Integrated Waveguide Self-Diplexing Antenna

Ultracompact Quarter-Mode Substrate Integrated Waveguide Self-Diplexing Antenna

Substrate integrated waveguide leaky wave antenna using longitudinal slots for seamless wide angle scanning with enhanced gain

Compact filtering power divider using mixed quarter‐ and eighth‐mode substrate integrated waveguide resonant cavities with flexible design

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