A New Tri-Band Bandpass Filter for Gsm, Wimax and Ultra-Wideband Responses by Using Asymmetric Stepped Impedance Resonators

Chen, Wei-Yu; Weng, Min‐Hang; Chang, Shoou‐Jinn; Kuan, Hsu‐Chiang; Su, Yu-Chia

doi:10.2528/pier11122010

Cited by 54 publications

(43 citation statements)

References 29 publications

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“…There is an increasing trend of multifunctional and frequencyagile wireless systems to achieve high integrity, miniaturization, multifunction and flexibility [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. In developing such systems, dualand triple-band bandstop filters are essential components, which can suppress the unwanted concurrent signals at separate frequencies [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Design of Planar Dual and Triple Narrow-Band Bandstop Filters With Independently Controlled Stopbands and Improved Spurious Response

Ning¹,

Wang²,

Xiong³

et al. 2012

PIER

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Abstract-A novel design of planar dual and triple narrow-band bandstop filter is presented by adopting the proposed meandered slot defected microstrip structure (MS-DMS) and the simplified spiral microstrip resonator (SSMR). Through this design, the stopbands of the dual-and triple-band bandstop filters can be individually controlled and the improved spurious responses are achieved. First, the fundamental and the first spurious resonances of the MS-DMS and SSMR are analyzed to provide the design rules. Then, by utilizing the prominent stopband of the MS-DMS and the stopband produced by the SSMR coupled to main microstrip line, a dual narrowband bandstop filter is constructed before its design procedure is outlined. Based on above investigations, a triple narrow-band bandstop filter is implemented by inserting extra SSMRs to another side of the main microstrip line of the dual-band filter to generate a new stopband. To verify the aforementioned design concepts, a dual and triple narrow-band bandstop filter are designed, simulated and tested. Both the simulation and measurement indicate that the fabricated filters exhibit good stopband/passband performance and improved first spurious resonance. Moreover, these filters are simple to design and quite compatible with planar fabrication technique, making them very attractive for practical applications.

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Section: Introductionmentioning

confidence: 99%

Design of Planar Dual and Triple Narrow-Band Bandstop Filters With Independently Controlled Stopbands and Improved Spurious Response

Ning¹,

Wang²,

Xiong³

et al. 2012

PIER

View full text Add to dashboard Cite

show abstract

“…Since then, efforts have been made to realize various kinds of filter configurations for the purpose of wideband and ultra-wideband uses [2][3][4][5][6][7]. In fact there is an issue of a possible electromagnetic interference over the allocated bandwidth of the UWB system, i.e., some narrow bands for other communication systems may exist in this band, such as wireless local area networks (WLANs) [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Design Filters Using Tunable E-Shaped Dual-Mode Resonators for Lower-Ultra-Wideband and Upper-Ultra-Wideband Applications

Wu¹,

Liao

Xiong³

et al. 2013

PIER C

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Abstract-Two ultra-wideband (UWB) microstrip bandpass filters (BPFs) are proposed by using tunable E-shaped dual-mode microstrip Stepped-Impedance Resonator (SIR). For the lower band filter measurement results show there is a passband of 3.1 GHz to 5.2 GHz and its 3 dB fractional bandwidth is 51%. The UWB upper band filter may be obtained by tuning E-shaped SIR. The measurement results show there is a passband of 6 GHz to 10.6 GHz and its 3 dB fractional bandwidth is 55%. Compared with the similar investigation using the cascade of electromagnetic band gap (EBG)-embedded multiple-mode resonator (MMR) and fork resonator, the proposed approach has some advantages, such as easier adjustment of bandwidths, better passband performances and smaller size etc..

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“…The linearity of the mixer dominates the overall linearity of the receiver in the RF front-end design. The nonlinearity is induced by the IM3 effect which can not be suppressed by RF filters [7][8][9]. Up to now, there have been lots of methods proposed to enhance the linearity of the mixer due to the nonlinear of the transconductor stage.…”

Section: Introductionmentioning

confidence: 99%

A Broadband High Linearity Current-Reuse Bulk-Controlled Mixer for 4g Applications

Wei¹,

Hsiao²,

Weng³

2013

PIER

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Abstract-A high linearity down-conversion mixer for the application of the fourth generation (4G) mobile communication systems is presented. The presented 2.3 to 5.8 GHz broadband mixer adopts current-reused and bulk-controlled techniques.The linearized transconductor stage is composed of the CMOS amplifiers and the bulk-controlled compensation (BCC) transistors. The bulk-controlled voltage is applied to adjust the threshold voltage of the BCC transistor. Thus, the equivalent third-order intermodulation (IM3) term of the CMOS amplifiers and the BCC transistors can be mitigated so as to improve the linearity. Furthermore, the current-reused architecture enhances the conversion gain of the proposed mixer and compensates the loss caused by the shunt feedback matching network. The presented mixer consumes 4.8 mA from a 1.5 V power supply. The measurement results of the mixer exhibit the maximum power conversion gain of 11.3 dB. The input third-order intercept point (IIP3) of 4.7 dBm over the entire 2.3-5.8 GHz band is observed.

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A New Tri-Band Bandpass Filter for Gsm, Wimax and Ultra-Wideband Responses by Using Asymmetric Stepped Impedance Resonators

Cited by 54 publications

References 29 publications

Design of Planar Dual and Triple Narrow-Band Bandstop Filters With Independently Controlled Stopbands and Improved Spurious Response

Design of Planar Dual and Triple Narrow-Band Bandstop Filters With Independently Controlled Stopbands and Improved Spurious Response

Design Filters Using Tunable E-Shaped Dual-Mode Resonators for Lower-Ultra-Wideband and Upper-Ultra-Wideband Applications

A Broadband High Linearity Current-Reuse Bulk-Controlled Mixer for 4g Applications

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