A Flexible Microstrip Low-Pass Filter Design Using Asymmetric Pi-Shaped DGS

Han, Yunan; Liu, Zhaohan; Zhang, Chengwen; Mei, Chaofan; Chen, Qiming; Hu, Kunkun; Yuan, Siyu

doi:10.1109/access.2019.2910350

Cited by 38 publications

(21 citation statements)

References 23 publications

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“…DGS also enhances the inductance of the transmission line, allowing transmission line's slow-wave coefficient to be increased. DGS's bandstop characteristics and slow-wave effects have been used to design a variety of microwave circuits, including filters [18]- [20], power splitters [21]- [22], antennas [23]- [26], etc.…”

Section: Filter Implementation and Verificationmentioning

confidence: 99%

Design of a Harmonic Suppressed Dual-Band Reconfigurable Bandpass Filter for Multistandard GNSS Receivers

2022

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This paper proposes a reconfigurable dual-band bandpass filter with independently tunable center frequencies that is intended to be integrated into reconfigurable multiband global navigation satellite system receivers. The center frequencies can be adjusted within the range of 1160-1280MHz and 1530-1630MHz for the two passbands, respectively. To achieve the design goal, the input and output feed lines are shared by a pair of quarter-wave uniform impedance resonators and a stub-loaded stepped impedance resonator with terminal-loaded varactor bias circuits. The electric length of the transmission lines is changed by using bias voltage to control the varactor diodes, thereby changing the operating frequencies of the dualband filter's two passbands, and the independent reconfigurability of the two passbands is realized. The insertion loss is less than 1.5dB and the return loss is better than 26dB in all tuning ranges. The proposed dual-band reconfigurable filter demonstrates the flexibility of controlling the passband independently to be compatible with multistandard signals, which can accommodate the deployment of new GNSS standard specifications.INDEX TERMS Bandpass filter, dual-band, GNSS receiver, harmonic suppressed, reconfigurable, varactor diode.

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Section: Filter Implementation and Verificationmentioning

confidence: 99%

Design of a Harmonic Suppressed Dual-Band Reconfigurable Bandpass Filter for Multistandard GNSS Receivers

2022

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“…Content may change prior to final publication. printed circuit board (FPCB) on the glass (made by PET films) also could be considered [24]. The fabrication process of the proposed antenna is done in two major steps.…”

Section: A Fabrication Processmentioning

confidence: 99%

Transparent Wideband Circularly Polarized GNSS Antenna for Vehicular Applications

Gharaati

Ghaffarian

Mirzavand³

2021

IEEE Access

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In this paper, a single-layer one-sided wideband coplanar waveguide (CPW)-fed transparent circularly polarized (CP) rectangular slot antenna with tilted beam is proposed. The antenna is designed on a glass substrate with a mesh grid in the conductive layer in order to increase the transparency. Since most of the vehicles' windshields are inclined for about 30 degrees, the beam of the antenna is designed to be tilted for about 30 degrees in elevation. For measurement verification, an inclined stage is fabricated to resemble the inclined surfaces (such as the windshields). The 10-dB impedance bandwidth of the antenna is 40.8% (1.13 -1.71 GHz) with a 3-dB axial ratio bandwidth of 47.4% (1.06 -1.72 GHz) and a 3-dB gain bandwidth of about 54% (1.02 -1.78 GHz ) with a maximum right handed circular polarization (RHCP) gain of 5.3 dBic. Also, the transparency of the antenna is about 95%. Therefore, the antenna is a good candidate for vehicular applications such as location tracking, using global navigation satellite system (GNSS) and specifically global positioning systems (GPS). Furthermore, a small-size transparent reflector is designed to be used below the proposed antenna in order to increase the front to back ratio (FBR).INDEX TERMS characteristic mode analysis (CMA), circularly polarized (CP) antenna, global navigation satellite system (GNSS), global positioning systems (GPS), slot antenna, tilted beam, transparent antenna, vehicular applications

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“…In recent years, a series of filters and power dividers based SIW and SSPPs have been reported [18,19]. In order to improve the integration and operating properties, parasitic structures like resonators [20], interdigital structures (ISs) [21], defected ground structures (DGSs) [22,23] have also been studied. The combination of SIW and SSPP provides a new solution for the miniaturization designs, since the power dividers of SIW are usually narrow-band and those of SSPP have limits of bulky dimensions.…”

Section: Introductionmentioning

confidence: 99%

Unequal Bandpass Filtering Power Divider Based on Hybrid HMSIW-SSPP Modes

Pan

Guo

et al. 2022

Front. Phys.

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This letter presents a novel unequal bandpass filtering power divider based on hybrid-mode of half mode substrate integrated waveguide (HMSIW) and spoof surface plasmon polaritons (SSPPs). Bandpass response is achieved by combining the transmission properties of HMSIW and SSPPs simultaneously. The operating bandwidth can be designed in a wide range by simply optimizing the dimensions of HMSIW and SSPPs. In addition, defected ground structures (DGSs) are etched on the bottom of the substrate to improve out-of-band suppression. The power division ratio of the proposed unequal power divider is finally optimized to 1:3. The measured results agree with the simulated one. Such design provides a stable power division within wide frequency range from 6.5 to 9.5 GHz.

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A Flexible Microstrip Low-Pass Filter Design Using Asymmetric Pi-Shaped DGS

Cited by 38 publications

References 23 publications

Design of a Harmonic Suppressed Dual-Band Reconfigurable Bandpass Filter for Multistandard GNSS Receivers

Design of a Harmonic Suppressed Dual-Band Reconfigurable Bandpass Filter for Multistandard GNSS Receivers

Transparent Wideband Circularly Polarized GNSS Antenna for Vehicular Applications

Unequal Bandpass Filtering Power Divider Based on Hybrid HMSIW-SSPP Modes

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