Microstrip filter with H-shaped fractal

Chen, Dong; Wang, Sheng; Li, Lin; Liu, Zhengyou; Zhao, Xingzhong; Man, Zhenyong; Chen, Zhangyou

doi:10.1063/1.2214178

Cited by 29 publications

(36 citation statements)

References 10 publications

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“…The passband bandwidths of 41.36% and 27.91% compare well against the fractal filter found in [5] with a 48% bandwidth, and even the non-fractal filter designed in [7] having 39%, 20%, and 27% bandwidths. Furthermore, this design shows a great improvement over the work in [11], where the percent bandwidths are not listed, but the −10 dB bandwidths for the passbands appear to be 30% maximum.…”

Section: Fabrication and Experimental Verificationmentioning

confidence: 90%

“…Recently, a single stage H-fractal filter was proposed to achieve widely spaced resonant stop bands [11]. The filter application was derived from the previous work with the H-fractal in photonic band gap [12].…”

Section: Introductionmentioning

confidence: 99%

“…The filter application was derived from the previous work with the H-fractal in photonic band gap [12]. The design in [11] was fabricated on FR-4 substrate of dimensions 30 × 30 mm 2 and 0.6 mm thickness. Using a 50 Ω main transmission line and 0.2 mm wide fractal lines, the length of the first fractal level was varied to show the tunability of the filter stop bands.…”

Section: Introductionmentioning

confidence: 99%

“…Using a 50 Ω main transmission line and 0.2 mm wide fractal lines, the length of the first fractal level was varied to show the tunability of the filter stop bands. One drawback of the H-fractal filter showed in [11] is the slow roll-off of the passband. This paper presents detailed investigations of a novel wideband microstrip H-fractal asymmetric bandpass filter providing multipassbands and a tuned notch band.…”

Section: Introductionmentioning

confidence: 99%

“…Section 2 describes the definitions of fractal structural parameters. Section 3 explores fractal iterations and fractal scaling parameters for a H-fractal filter [11], which is termed in this paper as the symmetric case with zero offset. It is then shown that the filter passband and transition (from pass to stop or stop to pass) bands can be significantly improved by introducing an offset between the two filter stubs.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Investigations on an H-Fractal Wideband Microstrip Filter With Multi-Passbands and a Tuned Notch Band

Patin¹,

Labadie²,

Sharma³

2010

PIER B

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Abstract-This paper investigates an H-fractal wideband microstrip filter with multi-passbands and a tuned notch band for wireless communication frequencies. The four different filter configurations explored are: symmetric with zero offset, symmetric with nonzero offset, asymmetric with zero offset, and asymmetric with nonzero offset. The effect of H-fractal iterations, fractal scaling parameters, and stub offset on the filter's multi-passband response is presented. A comparison is made to a non-fractal straight stub filter of equivalent length showing improved passband bandwidth while maintaining the same overall response. Then an asymmetry is introduced into the fractal geometry to produce a tuned notch band in the second passband. Two fractal scaling factors are shown to aid in the tuning of the filter notch band. Finally, an asymmetric filter is fabricated on FR-4 substrate and experimentally verified, illustrating that the filter has multi-passbands and can find applications in WiFi/WiMAX transponders.The fabricated filter's first two passbands (with respect to S 11 = −10 dB) are from 2.09 GHz to 3.18 GHz (fractional bandwidth of 1.09 GHz, 41.36%) and from 4.1 GHz to 5.43 GHz (factional bandwidth of 1.33 GHz, 27.91%), both for WiFi applications along with a notch band (S 21 = −3 dB) from 3.3 GHz to 3.94 GHz (factional bandwidth of 0.64 GHz, 17.67%) to suppress co-site WiMAX transmission. The measured data agrees reasonably well with the simulated filter response.

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Section: Fabrication and Experimental Verificationmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Investigations on an H-Fractal Wideband Microstrip Filter With Multi-Passbands and a Tuned Notch Band

Patin¹,

Labadie²,

Sharma³

2010

PIER B

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Self‐Assembled In‐Plane Growth of Mg₂SiO₄ Nanowires on Si Substrates Catalyzed by Au Nanoparticles

Zhang

Wong

Wang

et al. 2010

Adv Funct Materials

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In‐plane growth of Mg2SiO4 nanowires on Si substrates is achieved by using a vapor transport method with Au nanoparticles as catalyst. The self‐assembly of the as‐grown nanowires shows dependence on the substrate orientation, i.e., they are along one, two, and three particular directions on Si (110), (100), and (111) substrates, respectively. Detailed electron microscopy studies suggest that the Si substrates participate in the formation of Mg2SiO4, and the epitaxial growth of the nanowires is confined along the Si <110> directions. This synthesis route is quite reliable, and the dimensions of the Mg2SiO4 nanowires can be well controlled by the experiment parameters. Furthermore, using these nanowires, a lithography‐free method is demonstrated to fabricate nanowalls on Si substrates by controlled chemical etching. The Au nanoparticle catalyzed in‐plane epitaxial growth of the Mg2SiO4 nanowires hinges on the intimate interactions between substrates, nanoparticles, and nanowires, and our study may help to advance the developments of novel nanomaterials and functional nanodevices.

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Holographic Tensor Metasurface for Simultaneous Wireless Powers and Information Transmissions Using Polarization Diversity

Liu,

Li,

Cheng

et al. 2023

Adv Funct Materials

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A holographic tensor metasurface (HTM) is proposed from the energy perspective to achieve flexible regulations of polarization and energy distributions for simultaneous transmissions of power and information. A dual‐polarization receiving metasurface with high isolation is also proposed to enable simultaneous receptions of power and information. Based on the two metasurfaces, a novel system for simultaneous wireless information and power transmissions (SWIPT) is established, which can transmit microwave powers and information signals by flexibly regulating the electromagnetic waves in different polarizations. The proposed HTM can generate non‐diffraction Bessel beams of two polarizations to keep high‐power transfer efficiency in an environment with obstacles. A rectifier circuit is designed with a wide dynamic range to integrate with the receiving metasurface to capture the strong powers and weak signals simultaneously. The effect of different modulations on the rectification efficiency of microwave‐to‐DC and the performance of the SWIPT system are analyzed. The SWIPT system is verified by experiments to realize simultaneous transmissions of information and powers by only using the metasurfaces, which is beneficial to integrate the wireless sensor networks, communication modules, and artificial intelligence algorithms to build up smart cities.

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Microstrip filter with H-shaped fractal

Cited by 29 publications

References 10 publications

Investigations on an H-Fractal Wideband Microstrip Filter With Multi-Passbands and a Tuned Notch Band

Investigations on an H-Fractal Wideband Microstrip Filter With Multi-Passbands and a Tuned Notch Band

Self‐Assembled In‐Plane Growth of Mg₂SiO₄ Nanowires on Si Substrates Catalyzed by Au Nanoparticles

Holographic Tensor Metasurface for Simultaneous Wireless Powers and Information Transmissions Using Polarization Diversity

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Microstrip filter with H-shaped fractal

Cited by 29 publications

References 10 publications

Investigations on an H-Fractal Wideband Microstrip Filter With Multi-Passbands and a Tuned Notch Band

Investigations on an H-Fractal Wideband Microstrip Filter With Multi-Passbands and a Tuned Notch Band

Self‐Assembled In‐Plane Growth of Mg2SiO4 Nanowires on Si Substrates Catalyzed by Au Nanoparticles

Holographic Tensor Metasurface for Simultaneous Wireless Powers and Information Transmissions Using Polarization Diversity

Contact Info

Product

Resources

About

Self‐Assembled In‐Plane Growth of Mg₂SiO₄ Nanowires on Si Substrates Catalyzed by Au Nanoparticles