A compact and low‐loss sub‐millimeter‐wave ultra‐wideband bandpass filter

Cai, Peng; Ma, Zhewang; Guan, Xuehui; Zheng, Guoxin; Anada, Tetsuo; Hagiwara, Gen

doi:10.1002/mop.22149

Cited by 11 publications

(11 citation statements)

References 7 publications

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“…The comparison with some reported similar BPFs is presented in Table 1 [13][14][15][16][17][18]. It shows that the proposed filter achieves wider bandwidth except the design in [18], lower insertion loss except the design in [14], lower group delay variation in the passband range, smaller size and better frequency selectivity.…”

Section: Resultsmentioning

confidence: 90%

A Compact Wide Bandpass Filter With Good Selectively

Shen¹,

Lin²,

Ai³

et al. 2017

PIER C

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Abstract-A compact Ku-band bandpass filter (BPF) with wide passband, compact size and high selectively is presented. The presented BPF is composed of two quarter-wavelength resonators and a dual-mode resonator, resulting in a compact circuit size. The transmission zeros (TZs) located at the lower and upper stopband are achieved by the mixed electromagnetic (EM) coupling and dual-mode resonator, respectively, resulting in a high frequency selectively. The measured results show minimum in-band insertion loss, fractional bandwidth and variation of group delay to be 0.9 dB, 36.2% and 0.12 ns, respectively. Also, the stopband suppression is greater than 28 dB from 5 to 10.3 GHz and 30 dB from 19.5 to 29.5 GHz. The effective circuit size of the filter is 8.43 × 2.28 mm 2 (0.63λ g × 0.17λ g , where λ g is the guide wavelength of 15.1 GHz).

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Section: Resultsmentioning

confidence: 90%

A Compact Wide Bandpass Filter With Good Selectively

Shen¹,

Lin²,

Ai³

et al. 2017

PIER C

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“…The rapid growth in this field has stimulated the development of UWB microwave filters. There have been many reports of UWB filters working in the 3.1-10.6 GHz range [3][4][5], but few papers are available for millimeter-wave UWB filters working over the 22-29-GHz band [6]. Much effort has been invested in experimental and theoretical studies of planar microstrip UWB filters based on annular-and rectangular-ring resonators [6 -10].…”

Section: Introductionmentioning

confidence: 99%

“…Among the several antenna configurations being currently considered as candidate elements for UWB system [2,3], the Vivaldi antenna features both small size and good frequency/time domain behaviors [4]. Besides, the Vivaldi antenna is often used to constitute an UWB antenna array because of its directional feature [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a wideband microstrip bandpass filter using a dual-mode ring resonator with low insertion loss and sharp rejection was proposed by Hsieh et al This bandpass filter uses two tuning stubs to extend the stopbands by adding two directed-connected orthogonal feed lines [10]. Similarly, Peng et al have developed a millimeter-wave UWB bandpass filter using a dual-mode ring resonator, with the difference that they used two three-quarter wavelength stubs and a parallel-coupled feed structure to realize a wideband passband [6].The performance of the filter in the lower and upper stopbands meets the FCC limit very well. It is well known that the substrate plays an important role in the electrical packaging, especially for RF systems.…”

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confidence: 99%

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Millimeter‐wave ultra‐wideband bandpass filter based on liquid crystal polymer substrates for automotive radar systems

Zhang

Liu

Cai

et al. 2008

Micro & Optical Tech Letters

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A novel and compact millimeter-wave microstrip ultrawideband bandpass filter working over 22-29-GHz band based on liquid crystal polymer substrates for automotive radar systems is developed for Figure 4 Measured E-plane radiation patterns: with "" signs for a regular PRS; with "E" signs for a modified PRS. [Color figure can be viewed in the online issue, which is available at www.interscience.wiley. com] Figure 5Simulated E-plane radiation patterns: with "" signs for a regular PRS; with "E" signs for a modified PRS. [Color figure can be viewed in the online issue, which is available at www.interscience.wiley. com] Figure 6Measured H-plane radiation patterns: with "" signs for a regular PRS; with "E" signs for a modified PRS. [Color figure can be viewed in the online issue, which is available at www.interscience.wiley. com] 2276MICROWAVE AND OPTICAL TECHNOLOGY LETTERS / Vol. . Much effort has been invested in experimental and theoretical studies of planar microstrip UWB filters based on annular-and rectangular-ring resonators [6 -10]. Recently, a wideband microstrip bandpass filter using a dual-mode ring resonator with low insertion loss and sharp rejection was proposed by Hsieh et al. This bandpass filter uses two tuning stubs to extend the stopbands by adding two directed-connected orthogonal feed lines [10]. Similarly, Peng et al. have developed a millimeter-wave UWB bandpass filter using a dual-mode ring resonator, with the difference that they used two three-quarter wavelength stubs and a parallel-coupled feed structure to realize a wideband passband [6].The performance of the filter in the lower and upper stopbands meets the FCC limit very well. It is well known that the substrate plays an important role in the electrical packaging, especially for RF systems. Teflon and low temperature cofired ceramics are commonly used as materials for high frequency applications, but both are expensive. Liquid crystal polymer (LCP), as a new and advanced candidate for RF substrate material, has attracted much attention over the last years due to the unique combination of features and performance [11][12][13][14], such as minimal and consistent dimensional stability variation, high rigidity and strength, high heat resistance, very low moisture absorption, adjustable coefficient of thermal expansion (CTE), low cost, good high frequency properties, and environmental friendliness.In this article, a novel and compact millimeter-wave microstrip UWB bandpass filter working over 22-29-GHz band and intended for automotive radar systems is fabricated on LCP substrates for the first time. The designed UWB bandpass filter consists of a dual-mode ring resonator and two novel parallel-coupled input/ output feed structures. First, the preliminary configuration is proposed based on the dual-mode ring resonator theory. Second, the optimized configuration is obtained followed by a detailed analysis of all the factors influencing the bandwidth and the loss of the filter. Next, after optimization of the design and process of the fil...

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“…On the other hand, dual-mode ring resonators with open stubs are very attractive because it can realize transmission zeros in the lower and upper stopbands [8][9][10][11][12]. In [8] and [9], dual-mode square ring resonators loaded with quarter-wavelength open stubs are reported to design UWB filters with fractional bandwidth about 60%.…”

Section: Introductionmentioning

confidence: 99%

Millimeter-Wave Ultra-Wideband Bandpass Filter Employing Dual-Mode Ring Resonators Fed by Step-Impedance Coupled Lines

Cai

Kanzaki³

et al. 2009

J Infrared Milli Terahz Waves

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This paper presents a novel millimeter-wave ultra-wideband (UWB) bandpass filter (BPF) based on microstrip dual-mode rectangular ring resonators. In order to get strong coupling between the input/output line and the dual-mode ring resonators, a stepimpedance parallel-coupled structure is adopted for the design of the filter. On the other hand, transmission zeros are produced by the dual-mode resonator. As a consequence, the filter has low insertion-loss in its passband, sharp attenuation in its lower and upper stopbands and very wide stopbands. As an example, a filter with two dual-mode ring resonators is designed and fabricated. The measured frequency property of the fabricated filter shows good agreement with the simulated response.

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A compact and low‐loss sub‐millimeter‐wave ultra‐wideband bandpass filter

Abstract: relatively high propagation loss of 3.5 dB/cm. Nevertheless, we have shown that BCB 4024 -40 polymer is a low loss material suitable for relatively short photonic devices and economically saved in terms of realization cost.

Cited by 11 publications

References 7 publications

A Compact Wide Bandpass Filter With Good Selectively

A Compact Wide Bandpass Filter With Good Selectively

Millimeter‐wave ultra‐wideband bandpass filter based on liquid crystal polymer substrates for automotive radar systems

Millimeter-Wave Ultra-Wideband Bandpass Filter Employing Dual-Mode Ring Resonators Fed by Step-Impedance Coupled Lines

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