Varactor Tuned Dual-Band Bandpass Filter With Independently Tunable Band Positions

Pal, Biswajit; Mandal, Mrinal Kanti; Dwari, Santanu

doi:10.1109/lmwc.2019.2898725

Cited by 29 publications

(20 citation statements)

References 15 publications

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“…Figure 5C,D show photographs of the fabricated dual‐band BPF and comparisons of the simulated and measured results, respectively. Moreover, Table 1 shows comparison with some previous dual‐band BPFs such as References 11‐19.…”

Section: Resultsmentioning

confidence: 99%

A highly independent and controllable dual‐band bandpass filter based on source‐load coupling with stub‐block isolation structure

Denny

2020

Micro & Optical Tech Letters

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The main problem of dual‐band bandpass filter (BPF) structures is to control each passband performance individually, separately, and independently. This Letter is proposed a dual‐band BPF based on a source‐load coupling structure with stub‐block isolation to overcome the problem. The lower band resonator structure is placed on the top side, while the upper band resonator is placed at the bottom side, with the source‐load (SL) coupling structure in the middle. An additional stub‐block isolation structure is added to the center of the SL coupling structure. As a result, we have successfully designed an independent dual‐band bandpass filter with highly controllable working frequency/frequency center (fc), bandwidth (BW), reflection coefficient (S11), and isolation (ISO) between the passbands. The proposed dual‐band BPF was fabricated on an RT/Duroid 5880 substrate. Furthermore, this dual‐band BPF achieved an insertion loss/fractional bandwidth of 0.48 dB/7.71% and 0.35 dB/12.37% at 1.82 and 2.58 GHz, respectively. The good agreement between the simulated and measured results validates the proposed method.

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Section: Resultsmentioning

confidence: 99%

A highly independent and controllable dual‐band bandpass filter based on source‐load coupling with stub‐block isolation structure

Denny

2020

Micro & Optical Tech Letters

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“…Nevertheless, there have been relatively few efforts devoted to the tunability of both the center frequency and transmission zero frequency. Moreover, the majority of studies to date tended to focus on wide-tuning [8][9][10][11][12][13][14], whereas few studies have contributed to fine-tuning. In [8,9], p-i-n diodes as tuning elements were used in a switched tunable diplexer and a cross-shaped resonator with open stubs, separately.…”

Section: Introductionmentioning

confidence: 99%

A Microfabricated Bandpass Filter with Coarse-Tuning and Fine-Tuning Ability Based on IPD Process and PCB Artwork

Shen¹,

Qiang²,

Gao³

et al. 2022

Micromachines

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In this paper, a bandpass filter (BPF) was developed utilizing GaAs-based integrated passive device technology which comprises an asymmetrical spiral inductor and an interleaved array capacitor, possessing two tuning modes: coarse-tuning and fine-tuning. By altering the number of layers and radius of the GaAs substrate metal spheres, capacitance variation from 0.071 to 0.106 pF for coarse-tuning, and of 0.0015 pF for fine-tuning, can be achieved. Five air bridges were employed in the asymmetrical spiral inductor to save space, contributing to a compact chip area of 0.015λ0 × 0.018λ0. The BPF chip was installed on the printed circuit board artwork with Au bonding wire and attached to a die sink. Measured results demonstrate an insertion loss of 0.38 dB and a return loss of 21.5 dB at the center frequency of 2.147 GHz. Furthermore, under coarse-tuning mode, variation in the center frequency from 1.956 to 2.147 GHz and transmission zero frequency from 4.721 to 5.225 GHz can be achieved. Under fine-tuning mode, the minimum tuning value and the average tuning value of the proposed BPF can be accurate to 1.0 MHz and 4.7 MHz for the center frequency and 1.0 MHz and 12.8 MHz for the transmission zero frequency, respectively.

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“…Electromagnetic control can be achieved using electrical, optical, or magnetic methods [7,8]. An electrical component, such as pin [1][2][3][4][5][6] or varactor [6,9,10] diodes, have been widely employed to switch and control RF component operation. However, the required number of electronic components increases proportionally with the number of unit cells in a periodic structure, which can considerably impact the final cost, and also increases electromagnetic interference; a serious issue arises when designing electronic component DC biasing.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Control by Actuating Kirigami-Inspired Shape Memory Alloy: Thermally Reconfigurable Antenna application

Lee

Lim

2021

Sensors

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Electromagnetic responses are generally controlled electrically or optically. However, although electrical and optical control allows fast response, they suffer from switching or tuning range limitations. This paper controls electromagnetic response by mechanical transformation. We introduce a novel kirigami-inspired structure for mechanical transformation with less strength, integrating a shape memory alloy actuator into the kirigami-inspired for mechanical transformation and hence electromagnetic control. The proposed approach was implemented for a reconfigurable antenna designed based on structural and electromagnetic analyses. The mechanical transformation was analyzed with thermal stimulus to predict the antenna geometry and electromagnetic analysis with different geometries predicted antenna performance. We numerically and experimentally verified that resonance response was thermally controlled using the kirigami-inspired antenna integrated with a shape memory alloy actuator.

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Varactor Tuned Dual-Band Bandpass Filter With Independently Tunable Band Positions

Cited by 29 publications

References 15 publications

A highly independent and controllable dual‐band bandpass filter based on source‐load coupling with stub‐block isolation structure

A highly independent and controllable dual‐band bandpass filter based on source‐load coupling with stub‐block isolation structure

A Microfabricated Bandpass Filter with Coarse-Tuning and Fine-Tuning Ability Based on IPD Process and PCB Artwork

Electromagnetic Control by Actuating Kirigami-Inspired Shape Memory Alloy: Thermally Reconfigurable Antenna application

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