The Design and Fabrication of a Highly Compact Microstrip Dual-Band Bandpass Filter

Chen, Chu-Yu; Lin, Chien-Chih

doi:10.2528/pier10111301

Cited by 34 publications

(39 citation statements)

References 16 publications

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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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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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“…Currently, with the rapid development of modern wireless communications, bandpass filters with dual-band [1][2][3][4][5][6][7] and tri-band [8][9][10] even quad-band [11] operation become more and more important in communication systems for the multifunctional and miniaturization requirement of portable equipment. The traditional microstrip parallel-coupled halfwavelength resonator bandpass filters have narrow stopband between the fundamental response and the first spurious response, so the stepped-impedance resonator (SIR) [6][7][8] was presented in the past years not only to restrain the spurious responses, but also to shorten the resonator size.…”

Section: Introductionmentioning

confidence: 99%

Compact Split Ring Sir Bandpass Filters With Dual and Tri-Band

Xiao

Zhu²

2012

PIER C

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Abstract-Multi-band microwave filters are important for multifunctional and miniaturization requirement of portable communication equipment. In this paper, tri-section split ring stepped-impedance resonator is analyzed, and new compact dual-band and tri-band bandpass filters are proposed by using split ring stepped-impedance resonators, and the designs are demonstrated by measurement. The new dualband filters operate at about 2.4 and 5.5 GHz which meet IEEE 802.11 application requirements, and the new tri-band filters operate at about 2.4-2.6, 3.3-3.6 and 5.2-5.6 GHz, and filter sizes are greatly reduced compared with relative reports. The designed filters have advantages of compact and miniature structures, low passband insertion losses and good frequency selectivity, all these have prospect to be applied in wireless communication systems.

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“…In addition, with the advent of the modern wireless communication technologies, single transceivers operating at multiple frequency bands have become popular [4,5]. However, there are challenges in the design of dual-band filter supporting compact size, low insertion loss in pass bands, high quality factor and stop-band characteristics with high insertion loss and high skirt selectivity [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…In [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19], several techniques relating to planar dual-band filter design have been proposed. In particular, the commonly used approach is to use planar structures to achieve dual-band filter characteristics.…”

Section: Introductionmentioning

confidence: 99%

Dual-Band Filter for Wimax and Wlan With Improved Upper Stop Band Performance

Kamma¹,

Reddy²,

Parmar³

et al. 2014

PIER C

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Abstract-In this paper, a novel and compact dual-band filter with enhanced upper stop characteristics has been presented. Dual band pass filter characteristics are achieved by introducing transmission zero (TZ) in pass band of band pass filter (BPF). The wide band pass filter (BPF) is implemented by combining low pass filter characteristics (i.e., stepped impedance resonator) and high pass filter characteristics (i.e., short stubs). Closed rectangular ring resonator (CRRR) and open loop rectangular ring (OLRR) combination is used to produce two transmission zeros (TZs). One TZ is placed on the pass band of BPF such that resultant filter characteristic consists of two pass band. However, the second TZ is placed at edge of the pass band in BPF to improve skirt selectivity. The two pass bands are designed to cover two popular wireless bands namely WiMAX (center frequency f 1 (3.5 GHz) and WLAN (center frequency f 2 (5.7 GHz)) bands, i.e., 3.35-3.65 GHz and 5.5-5.85 GHz respectively. Equi-ripple low pass stepped impedance resonator (SIR) filter response is responsible for improved and spurious free upper stop band (> 20 GHz, i.e., > 6f 1 ) and also provides sharp skirt attenuation at upper stop band. The proposed filter is implemented on an RT/Duroid 5880 (ε r = 2.2) substrate with thickness of 0.785 mm and surface area of 19 × 12 sq · mm. Good agreement between simulated and measured results ensures that the proposed filter is a suitable candidate for modern dual band communications.

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The Design and Fabrication of a Highly Compact Microstrip Dual-Band Bandpass Filter

Cited by 34 publications

References 16 publications

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

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

Compact Split Ring Sir Bandpass Filters With Dual and Tri-Band

Dual-Band Filter for Wimax and Wlan With Improved Upper Stop Band Performance

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