Fully Inkjet-Printed Three-Dimensional Bandpass Filter on Liquid Crystal Polymer Substrate

Kao, Hsuan‐Ling; Cho, Cheng-Lin

doi:10.1109/ectc.2018.00333

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…This advance overcomes the challenges of ink spreading and RF circuit detuning, thereby enabling the production of high-performance arrays on flexible substrates. Another significant contribution is the development of a fully inkjet-printed three-dimensional (3D) band pass filter on a liquid crystal polymer substrate [23]. Here, the authors underscore the accuracy and flexibility of inkjet printing in the manufacture of complex and miniaturized RF components, which are essential to modern communications systems.…”

Section: Introductionmentioning

confidence: 99%

On the Development of Inkjet-Printed Band Pass Filters Based on the Microstrip Hairpin Structure

Gugliandolo,

Quattrocchi,

Campobello

et al. 2024

Instruments

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In recent years, inkjet printing has emerged as a promising advanced fabrication technology in the field of electronics, offering remarkable advantages in terms of cost-effectiveness, design flexibility, and rapid prototyping. For these reasons, inkjet printing technology has been widely adopted in various applications, including printed circuit board fabrication, sensor development (e.g., temperature, humidity, and pressure sensing), and antenna and filter production, up to the microwave frequency range. The present paper is focused on the investigation of a methodology based on Monte Carlo simulations for quantitatively assessing the influence of fabrication tolerances on the performance of inkjet-printed microwave devices. In particular, the proposed methodology is applied to an inkjet-printed hairpin band pass filter specifically tailored for operation in the L band (i.e., from 1 GHz to 2 GHz). The initial design phase involved the use of computer aided design (CAD) software to optimize the geometric dimensions of the designed filter to closely match the desired performance specifications in terms of bandwidth, insertion loss, and return loss. Later, a Monte Carlo analysis was conducted to evaluate the propagation of tolerances in the fabrication process throughout the design and to estimate their effects on device performance. The fabrication process exploited the advanced capabilities of the Voltera inkjet printer, which was used to deposit a silver-based conductive ink on a commercial Rogers substrate. The device’s performance was evaluated by comparing the simulated scattering parameters with those measured on the developed filter using a vector network analyzer (VNA), thus ensuring accurate validation of real-world performance.

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Section: Introductionmentioning

confidence: 99%

On the Development of Inkjet-Printed Band Pass Filters Based on the Microstrip Hairpin Structure

Gugliandolo,

Quattrocchi,

Campobello

et al. 2024

Instruments

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“…In [9], W-band bandpass filters are presented using the aerosol jet printing process. Whereas in [10], a 12 GHz inkjet printed hairpin bandpass filter has been fabricated on a liquid crystal polymer substrate. Another inkjet printed dual-mode ring bandpass filter has been demonstrated in [11].…”

Section: Introductionmentioning

confidence: 99%

Fully Printed VO₂ Switch Based Flexible and Reconfigurable Filter

Yang

Vaseem

et al. 2020

2020 IEEE/MTT-S International Microwave Symposium (IMS)

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Frequency reconfigurable filters are high in demand because they can cover multiple frequency bands, thus minimizing system level cost and size requirements. Another emerging trend is the flexibility or conformability of the electronic components, so that they are suitable for mounting on non-planar objects as well as for wearable applications. In this work, we demonstrate a frequency reconfigurable bandpass filter that has been fully printed on a flexible Kapton substrate. The frequency reconfigurability has been achieved through a switch made of Metal Insulator Transition (MIT) material Vanadiumdi-oxide (VO2). The VO2 switch has been printed through a custom ink. The switch is in OFF condition (insulating condition) at room temperature and turns ON (becomes conductive) at MIT temperature of 68C. The microstrip bandpass filter employs dual mode resonators and can switch from 4.0 GHz to 3.7 GHz. The required thermal bias is provided through a printed heater which is attached to the backside of the filter. Due to the flexible Kapton substrate and the printing process, the prototype of the filter is highly flexible and low cost. Measured results are promising and in good agreement with the simulation results.

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Additively Manufactured Dual-Mode Reconfigurable Filter Employing VO₂-Based Switches

Yang

Vaseem

et al. 2020

IEEE Trans. Compon., Packag. Manufact. Technol.

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Modern wireless devices operate on multiple frequency bands, and thus can benefit from frequency reconfigurable Radio Frequency (RF) components, especially filters as they are typically larger in size and are required for every frequency band. In addition, many applications such as wearable electronics, desire stable performance from the devices when they are bent or flexed. However, most of the reconfigurable filters are built on rigid substrates and utilize expensive discrete RF switches, which need to be soldered to the filters. In this work, we present a fully printed filter that achieves reconfigurability through printed Vanadium Dioxide (VO2) based switches, which are extremely low cost and do not require any soldering for their attachment. The filter design is based on a dual-mode resonator which enables a second-order filter despite a single resonator, thus helping in making the filter compact. It also helps in maintaining a decent insertion loss (2.6 dB), despite relatively low conductivity of the metallic ink. The switches, when activated thermally through a printed heater at the backside, reconfigure the frequency from 4 GHz to 3.75 GHz. The filter has been realized on a flexible Kapton substrate, making the filter conformable to any surface. Measurements under various bending conditions reveal stable performance, making this filter design suitable for a number of wearable and Internet of Things applications.

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Fully Inkjet-Printed Three-Dimensional Bandpass Filter on Liquid Crystal Polymer Substrate

Cited by 3 publications

References 11 publications

On the Development of Inkjet-Printed Band Pass Filters Based on the Microstrip Hairpin Structure

On the Development of Inkjet-Printed Band Pass Filters Based on the Microstrip Hairpin Structure

Fully Printed VO₂ Switch Based Flexible and Reconfigurable Filter

Additively Manufactured Dual-Mode Reconfigurable Filter Employing VO₂-Based Switches

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Fully Inkjet-Printed Three-Dimensional Bandpass Filter on Liquid Crystal Polymer Substrate

Cited by 3 publications

References 11 publications

On the Development of Inkjet-Printed Band Pass Filters Based on the Microstrip Hairpin Structure

On the Development of Inkjet-Printed Band Pass Filters Based on the Microstrip Hairpin Structure

Fully Printed VO2 Switch Based Flexible and Reconfigurable Filter

Additively Manufactured Dual-Mode Reconfigurable Filter Employing VO₂-Based Switches

Contact Info

Product

Resources

About

Fully Printed VO₂ Switch Based Flexible and Reconfigurable Filter