Wideband Band-Pass Filter Design Using Coupled Line Cross-Shaped Resonator

La, Dong‐Sheng; Guan, Xin; Chen, Shuai-Ming; Li, Yuying; Guo, Jingwei

doi:10.3390/electronics9122173

Cited by 7 publications

(6 citation statements)

References 17 publications

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“…The UWB bandpass filters are required to exhibit high selectivity, low insertion loss, higher out-of-band rejection, and flat group delay. For these reasons and to meet these specifications, huge efforts have been executed in the last two decades to develop various UWB filters [2][3][4][5][6][7][8][9][10][11][12][13]. One of the approaches for the design of very-wide-band bandpass filters with small footprints is implementing multi-mode resonators (MMR) [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…In both cases, five-mode UWB filters are designed with good filtering performance and sharp selectivity. The UWB filters can also be designed using different topologies such as low-temperature cofired ceramic technology [8], multilayer printed-circuit-board configuration [9,10], parallelcoupled-lines [11,12], and double-ridged half-mode SIW and ridged half-mode folded substrate-integrated waveguide [13]. Another common way to design UWB bandpass filters is using shunt short-circuited stubs.…”

Section: Introductionmentioning

confidence: 99%

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Parallel-Coupled-Line Bandpass Filter with Notch for Ultra-Wideband (UWB) Applications

2023

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A compact parallel-coupled-line microstrip bandpass filter with a very wideband passband and a narrow notched band is demonstrated in this paper. The presented bandpass filter was constructed from one section of three parallel-coupled-lines which has a length of a quarter wavelength at a midband frequency of 6.9 GHz. For the purpose of increasing the filter selectivity, the middle line is extended by a length of a quarter-wavelength and connected at one end to the ground plane. Therefore, a transmission zero was generated at each side of the passband which effectively improved the filter performance. In addition, a narrow notched band at a precise frequency inside the proposed passband was exhibited by placing a stepped-impedance resonator near the parallel-coupled-line for blocking the unwanted radio signal. The proposed filter was designed, simulated, fabricated, and measured. The fabricated filter has a very compact circuit size and its measured response shows an excellent agreement with the simulated results.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Parallel-Coupled-Line Bandpass Filter with Notch for Ultra-Wideband (UWB) Applications

2023

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“…The ideal response consists of eight transmission zeros (TZs) and five transmission poles (TPs) within the 2fc; however, the microstrip and fabricated results show less TZs at the upper stopband. The cross-shaped resonator having three coupled line structures is integrated to achieve the wide BPF filter response [5]. The resonator having a parallel-coupled line as feed is replaced with three coupled line feed to achieve strong coupling that helped in obtaining better out of band rejection and reducing the return loss in the passband.…”

Section: Introductionmentioning

confidence: 99%

Multi-Band Bandpass Filter Using Novel Topology for Next-Generation IoT Wireless Systems

Faisal¹,

Khalid²

2022

Computers, Materials &Amp; Continua

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The design of single-and quad-band Bandpass Filter (BPF) topology has been presented in this paper for next-generation Internet of Things (IoT) devices. The main topology is constructed using the Split Ring Resonator (SRR), separated by the Anti-Parallel Coupled Line Structure (APCLS). A detailed analysis of APCLS has been presented, which is further used to construct the single-and quad-band BPF. The single-band BPF design consists of SRR loaded with APCLS. The developed single-band BPF displays a dual-mode response with a center frequency of 2.65 GHz and a measured fractional bandwidth of 17.17%. Moreover, a quad-band bandpass filter has been achieved using the same topology with minor modification in the SRR and APCLS electrical parameters. The developed quad-band BPF generates a dual-mode response having center frequencies of 1.2, 2.4, 3.5, and 4.7 GHz with the measured fractional bandwidth of 13%, 26%, 16%, and 5%, respectively. Two prototypes have been fabricated on the highfrequency substrate to validate the proposed topologies. Very high rejection in the stopbands region, little in-band insertion loss, and very selective passband have been measured for single-and quad-band BPFs. The measured and simulated results are well correlated.

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“…A miniaturized quarter-wavelength stepped impedance resonators were directly coupled for wideband achievement in [12]. A wideband bandpass filter with three coupled line cross-shaped structures is used for realizing the strong coupling in [13]. Qiang et al [14] proposed the three cascaded transmission lines for achieving 10-dB bandwidth of 480 MHz.…”

Section: Introductionmentioning

confidence: 99%

Capacitive Coupled Wide-Notch Stepped Impedance Narrow-Band Bandpass Filter for WiMax Application

Kayalvizhi¹,

Malliga²

2022

Computer Systems Science and Engineering

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The development of wireless communication standards necessitates optimal filter design for the selection of appropriate bands of frequencies. In this work, a compact in size pair of parallel coupled symmetric stepped impedancebased resonator is designed with supporting to the WiMAX communication standards. The coupled resonator is tuned to allow the frequency band between 3.4 GHz and 3.8 GHz, which is centered at 3.6 GHz. A parasitic effect of capacitively coupled feed structure is used for exciting the two symmetrical stepped impedance resonators. The bandwidth and selectivity of the filter are enhanced with the change of characteristic impedances and controlling the coupling gap between resonators. This design offers single narrow sharp passband selectivity as well as multiple stopband harmonic suppression arising as a result of multiple transmission zeros. The designed filter operates with a fractional bandwidth (FBW) of 11.47%. The proposed single narrowband bandpass filter provides better suppression in either side of the tuned frequency (3.6 GHz) without degrading the passband performance. Also, this novel filter offers an insertion loss of about −0.08 dB and a return loss of greater than −30 dB in passband. This approach is useful for eliminating unwanted spurious harmonics responses that enter the desired response. The suggested bandpass filter has been simulated using Advanced Design System (ADS) tool, and the measurement has been made using a network analyzer, and the results are reported.

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Wideband Band-Pass Filter Design Using Coupled Line Cross-Shaped Resonator

Cited by 7 publications

References 17 publications

Parallel-Coupled-Line Bandpass Filter with Notch for Ultra-Wideband (UWB) Applications

Parallel-Coupled-Line Bandpass Filter with Notch for Ultra-Wideband (UWB) Applications

Multi-Band Bandpass Filter Using Novel Topology for Next-Generation IoT Wireless Systems

Capacitive Coupled Wide-Notch Stepped Impedance Narrow-Band Bandpass Filter for WiMax Application

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