Compact Millimeter-Wave CMOS Bandpass Filters Using Grounded Pedestal Stepped-Impedance Technique

Chang, Shuen-Chien; Chen, Yi-Ming; Chang, Sheng-Fuh; Jeng, Yng-Huey; Wei, Chia-Liang; Huang, Chengcheng; Jeng, Chih-Pin

doi:10.1109/tmtt.2010.2086591

Cited by 52 publications

(26 citation statements)

References 28 publications

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“…Its shape factor is relatively large, and it occupies at least four times the area. The filter in [18] has a shape factor and an insertion loss comparable with the work reported here. However, the size is large even without the input and output pads and it is not suitable for low-frequency applications where the wavelength is large.…”

Section: B Cmos Filtersupporting

confidence: 73%

Design of Optimized Minimum Inductor Bandpass Filters

Taslimi

Mouthaan

2017

IEEE Trans. Microwave Theory Techn.

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A design methodology for optimized minimum inductor bandpass filters (BPFs) is presented. Design curves are provided to determine the filter order for a required out-of-band rejection as a function of bandwidth (BW). Coefficients for BWs from 10% to 100% in steps of 10% for different filter orders and two different transmission zero placements are provided. For both cases, the required in-band return loss is larger than 10 dB. Using the derived coefficients, filters with required rejections can be designed for a given center frequency. To validate the design methodology, five discrete element filters with different BWs are designed and fabricated at a center frequency of 1.5 GHz. Furthermore, to show the application of the minimum inductor filters in complementary metal-oxide-semiconductor (CMOS), an S-band BPF in 0.13-µm CMOS, with 60% BW, is designed and fabricated. The out-of-band rejection of the fabricated filter is larger than 50 dB. Index Terms-Lumped filters, minimum inductor filters, optimization design methodology.0018-9480 . His current research interests include microwave and millimeter-wave circuits, phased-array antennas, and digital beamforming.

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Section: B Cmos Filtersupporting

confidence: 73%

Design of Optimized Minimum Inductor Bandpass Filters

Taslimi

Mouthaan

2017

IEEE Trans. Microwave Theory Techn.

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“…1b. Since a TSIR filter can achieve a smaller circuit size than those of the coupled-resonator filters adopted in [3 -5], it is more promising to implement in the IC process [6]. Moreover, as the proposed oscillator is designed in the lower frequency band, the net-type folding technique [7] can be further applied to miniaturise the circuit size of the TSIR filter.…”

Section: Introductionmentioning

confidence: 99%

“…The total electrical length of the SIR is represented as u SIR ¼ 2(u 1 + u 2 ). Based on [6,8], the resonance equation of the SIR fundamental resonance mode, namely the odd mode, can be expressed as…”

Section: Introductionmentioning

confidence: 99%

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Microwave low phase noise oscillators using T-shaped stepped-impedance-resonator filters

Tseng

Huang

Chang

2012

IET Microw. Antennas Propag.

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Low phase noise microwave oscillators using T-shaped step-impedance-resonator (TSIR) filters are proposed and experimentally verified. Instead of using a high-quality factor resonator to design an oscillator, the TSIR filter is embedded into the feedback loop as a frequency stabilisation element. As the oscillator is designed at the group-delay-peak frequency of the filter, one can improve the phase-noise performance. Moreover, to miniaturise the oscillator circuit size, the TSIR filter can be further evolved into a compact net-type filter by the folding technique. The developed oscillators using TSIR filters at 1 and 5.2 GHz have the measured phase noises of 2131 and 2132 dBc/Hz at 1 MHz offset frequency, respectively. On the other hand, as compared with oscillators using TSIR filters, using a net-type TSIR filter to develop the filter-based oscillator at 1 GHz can achieve a 38% circuit size reduction and a 4-dB phase noise improvement at 1 MHz offset frequency.

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“…A 34-GHz microstrip bandpass filter was constructed to include three nonuniform, coupled-line hairpin resonators for suppressing unwanted, spurious harmonic responses [3]. Bandpass filters constructed through 0.18-μm CMOS technology incorporated a stepped-impedance structure by integrating a grounded pedestal into the microstrip line [4].…”

Section: Introductionmentioning

confidence: 99%