Very Compact Full Differential Bandpass Filter With Transformer Integrated Using Integrated Passive Device Technology

Wu, Sung‐Mao; Kuo, Chun-Ting; Chen, Chien‐Hsun

doi:10.2528/pier10121701

Cited by 19 publications

(17 citation statements)

References 34 publications

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“…To reduce the occupied area, the coils in the resonators are stacked, yielding high coupling efficiency. The equivalent circuit of the proposed structure is the same as the design in [22], which employed an interactive wound coil. Mutual inductance is formed by lateral coupling, but the transmission zero in the low stopband does not appear.…”

Section: Introductionmentioning

confidence: 99%

Miniaturization Design of Full Differential Bandpass Filter With Coupled Resonators Using Embedded Passive Device Technology

Kuo²,

Lyu³

et al. 2011

PIER

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Abstract-This paper presents two full differential bandpass filters with small occupied areas. Both filters are designed with the same basic structure which consists of two double coupled resonators with magnetic coupling. The resonators are stacked up and have the advantage of high coupling efficiency, reducing the area. Nevertheless, in the basic structure, the insertion loss in the high stopband is above −10 dB and therefore does not meet the requirement for bandpass filter design. Thus, two solutions are introduced to form the proposed filters. The first one integrates the ground plane, while the second one makes the use of an extra transmission zero. With the help of these solutions, two types of full differential bandpass filters are implemented on an FR4 using the embedded passive device technology, with the additional purpose of being designed for SiP applications. The passband of the filters conforms to the WLAN IEEE 802.11a (5 GHz) standard. Most importantly, the occupied areas of the two proposed bandpass filters are only 6 mm × 6.7 mm and 6.6 mm × 8.3 mm respectively. Compared with previous research, area reductions of up to 98.05% and 97.76% can be achieved.

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Section: Introductionmentioning

confidence: 99%

Miniaturization Design of Full Differential Bandpass Filter With Coupled Resonators Using Embedded Passive Device Technology

Kuo²,

Lyu³

et al. 2011

PIER

Self Cite

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“…Equivalent circuit model is frequently used in microwave devices analysis [19][20][21][22]. The equivalent circuit of the asymmetric halfwavelength resonators coupling structure with shunt open stubs is established, as shown in Figure 2.…”

Section: Analysis the Resonance Frequency Of Asymmetric Half-wavelengmentioning

confidence: 99%

Analysis and Application of Shunt Open Stubs Based on Asymmetric Half-Wavelength Resonators Structure

Li¹,

Wang²

2012

PIER

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Abstract-In this paper, the applications of shunt open stubs are reported based on asymmetric half-wavelength resonators structure. To demonstrate the design ideas, the analysis methods of ABCD matrix and equivalent circuit are used. The multi-band bandpass, miniaturization and harmonic suppression by application of the shunt open stubs are demonstrated. The measured insertion loss of the dual-band filter with the center frequency of 1.9 and 5.8 GHz is less than 2.7 dB. The insertion loss of the tri-band filter with the center frequency of 1.5, 4 and 6.3 GHz is less than 2.7 dB. Furthermore, a compact bandpass filter with size around 12.3 mm * 11.5 mm is designed and fabricated. The bandwidth of the filter is 120 MHz with the center frequency of 2.4 GHz and the insertion loss is less than −3 dB. Especially, the insertion loss is less than −20 dB from 2.8 GHz to 7 GHz. For the filters above, the simulated results and the measured results agree well.

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“…In practical circuits, common-mode noise still interferes with differential signal path, which will degrade the signal integrity of a high speed circuit system [1][2][3][4][5][6][7][8]. The balanced bandpass filters (BPFs) are effective in removing the common-mode noises but still keep good signal integrity performance for the differential signals in their passbands [9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Some balanced filters based on branch-line structures were presented in [9,14,15], which obtained good common-mode suppression in the passband and high selectivity for the differential mode but relatively high insertion loss. In addition, differential filters were constructed in [10,11] by taking advantage of the parallel-coupled lines which had some limitations for the special structures.…”

Section: Introductionmentioning

confidence: 99%

Compact Balanced Uwb BPF Based on Hmsiw and D-DGS

Li¹,

Ding²,

Wei³

et al. 2015

PIER Letters

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Abstract-A compact balanced UWB bandpass filter (BPF) is proposed in this paper, which is based on the half-mode substrate integrated waveguide (HMSIW) and the differential defected ground structure (D-DGS). Using the HMSIW, the filter can achieve compact size, wide passband and good compatibility. Two D-DGS cells are employed to provide good suppression for the common-mode (CM) noise, while they have small effect on the performance of differential-mode (DM) signals. To validate the design theory, a microstrip balanced UWB BPF is designed, fabricated and measured to meet compact size, low insertion loss, good return loss as well as proper bandwidth. The predicted results are compared with measured data and show reasonable agreement.

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Very Compact Full Differential Bandpass Filter With Transformer Integrated Using Integrated Passive Device Technology

Cited by 19 publications

References 34 publications

Miniaturization Design of Full Differential Bandpass Filter With Coupled Resonators Using Embedded Passive Device Technology

Miniaturization Design of Full Differential Bandpass Filter With Coupled Resonators Using Embedded Passive Device Technology

Analysis and Application of Shunt Open Stubs Based on Asymmetric Half-Wavelength Resonators Structure

Compact Balanced Uwb BPF Based on Hmsiw and D-DGS

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