Multimode HMSIW-Based Bandpass Filter with Improved Selectivity for Fifth-Generation (5G) RF Front-Ends

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

doi:10.3390/s20247320

Cited by 15 publications

(6 citation statements)

References 22 publications

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“…For this reason, the research will be extended to include the transmission coefficient and group delay. Additionally, an analysis based on 3D Smith charts [ 33 , 34 ] is planned.…”

Section: Discussionmentioning

confidence: 99%

Application of a Single Cell Electric-SRR Metamaterial for Strain Evaluation

Herbko

Łopato

2021

Materials

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Strain is a crucial assessment parameter in structural health monitoring systems. Microstrip sensors have been one of the new types of sensors used to measure this parameter in recent years. So far, the strain directionality of these sensors and the methods of miniaturization have been studied. This article proposes the use of a single cell metamaterial as a resonator of the microstrip sensor excited through the microstrip line. The proposed solution allowed for significant miniaturization of the microstrip sensor, with just a slight decrease in sensitivity. The proposed sensor can be used to measure local deformation values and in places with a small access area. The presented sensor was validated using numerical and experimental methods. In addition, it was compared with a reference (rectangular geometry) microstrip sensor.

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“…For this reason, the research will be extended to include the transmission coefficient and group delay. Additionally, an analysis based on 3D Smith charts [ 33 , 34 ] is planned.…”

Section: Discussionmentioning

confidence: 99%

Application of a Single Cell Electric-SRR Metamaterial for Strain Evaluation

Herbko

Łopato

2021

Materials

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“…Microwave filters are key devices in the communications payload of satellites [1]. Among different technologies, a rectangular waveguide (RW) is often employed to implement them at microwave/mm-wave frequencies, due to its low loss, high quality factor, and high-power handling capability with regards to planar and substrate integrated waveguide (SIW) solutions [2][3][4][5][6][7]. However, unlike RW technology, planar and SIW filters have a low profile and weight, small sizes, and allow the easy integration of active components.…”

Section: Introductionmentioning

confidence: 99%

Compact Wideband Groove Gap Waveguide Bandpass Filters Manufactured with 3D Printing and CNC Milling Techniques

Máximo-Gutierrez,

Hinojosa,

Abad-López

et al. 2023

Sensors

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This paper presents for the first time a compact wideband bandpass filter in groove gap waveguide (GGW) technology. The structure is obtained by including metallic pins along the central part of the GGW bottom plate according to an n-order Chebyshev stepped impedance synthesis method. The bandpass response is achieved by combining the high-pass characteristic of the GGW and the low-pass behavior of the metallic pins, which act as impedance inverters. This simple structure together with the rigorous design technique allows for a reduction in the manufacturing complexity for the realization of high-performance filters. These capabilities are verified by designing a fifth-order GGW Chebyshev bandpass filter with a bandwidth BW = 3.7 GHz and return loss RL = 20 dB in the frequency range of the WR-75 standard, and by implementing it using computer numerical control (CNC) machining and three-dimensional (3D) printing techniques. Three prototypes have been manufactured: one using a computer numerical control (CNC) milling machine and two others by means of a stereolithography-based 3D printer and a photopolymer resin. One of the two resin-based prototypes has been metallized from a silver vacuum thermal evaporation deposition technique, while for the other a spray coating system has been used. The three prototypes have shown a good agreement between the measured and simulated S-parameters, with insertion losses better than IL = 1.2 dB. Reduced size and high-performance frequency responses with respect to other GGW bandpass filters were obtained. These wideband GGW filter prototypes could have a great potential for future emerging satellite communications systems.

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“…SIW is developed by two rows of metallic vias connecting the top and bottom copper sheets, and thereby confines the electromagnetic wave propagation and behaves like the rectangular waveguide. Due to the advantages of low loss, low cost, compact size, and high‐ Q factor, SIW has been widely used in RF devices such as filters, couplers, antennas, and so forth 1–10 …”

Section: Introductionmentioning

confidence: 99%

Wideband aperture coupled substrate integrated waveguide power divider based on half mode analysis

Wang

Feng

Huang

et al. 2021

Int J RF Mic Comp-Aid Eng

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A wideband substrate integrated waveguide (SIW) power divider based on half mode analysis is presented in this article. The structure is constructed by two substrate layers and three metal layers. Two symmetrical longitudinal apertures etched on the middle ground are introduced to realize the equal power division, and couple the signal from the SIW to the upper layer output ports simultaneously. Two fork‐type microstrip lines on the top metal layer are used to improve the bandwidth of the power divider. The equivalent circuit based on the half mode analysis method is presented for theoretical analysis and further design of the power divider, and good impedance matching can be obtained accordingly. For demonstration, a power divider prototype with the dimension of 48 × 73 × 1.38 mm3 is designed, fabricated, and measured. Good agreement is observed between the simulated and measured results. The measured return loss of the SIW power divider is better than 12 dB in the frequency range of 6.2 ~ 10.3 GHz, and the insertion loss is around 1.6 dB over the entire frequencies of interest.

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Multimode HMSIW-Based Bandpass Filter with Improved Selectivity for Fifth-Generation (5G) RF Front-Ends

Cited by 15 publications

References 22 publications

Application of a Single Cell Electric-SRR Metamaterial for Strain Evaluation

Application of a Single Cell Electric-SRR Metamaterial for Strain Evaluation

Compact Wideband Groove Gap Waveguide Bandpass Filters Manufactured with 3D Printing and CNC Milling Techniques

Wideband aperture coupled substrate integrated waveguide power divider based on half mode analysis

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