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Sidén, Johan
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Publications (10 of 79) Show all publications
Du, Y., Wu, X., Sidén, J. & Wang, G. (2020). Design of ultra-wideband antenna with high-selectivity band notches using fragment-type etch pattern. Microwave and optical technology letters (Print), 62(2), 912-918
Open this publication in new window or tab >>Design of ultra-wideband antenna with high-selectivity band notches using fragment-type etch pattern
2020 (English)In: Microwave and optical technology letters (Print), ISSN 0895-2477, E-ISSN 1098-2760, Vol. 62, no 2, p. 912-918Article in journal (Refereed) Published
Abstract [en]

By specifying objective functions defining the two bands to be notched with high roll-off criteria (ROCs), optimization searching for the best fragment-type etch pattern on ultra-wideband (UWB) antenna is implemented by using multi-objective optimization. The optimization with too many objective functions requires special treatment to improve the searching efficiency. In this design, two slits are preset on appropriate positions on different sides of the UWB radiator to constrain the decision space for etch pattern searching and yield two initial notched bands to speed up the optimization. For demonstration, a UWB patch antenna is designed with dual-band notches of ROC = 0.63 at WiMAX band and ROC = 0.65 at WLAN band. Both the simulation and measurement results indicate that there is significant improvement of the selectivity of the dual-band notches.

Keywords
band notch, fragment-type structure, multi-objective optimization, ultra-wideband antenna
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-37672 (URN)10.1002/mop.32103 (DOI)000490935700001 ()2-s2.0-85074271353 (Scopus ID)
Available from: 2019-11-13 Created: 2019-11-13 Last updated: 2020-02-21Bibliographically approved
Persson, J., Sidén, J. & Bertilsson, K. (2020). Geometrical Optimization of Jetting Duct. In: 2020 8th International Electrical Engineering Congress (iEECON): . Paper presented at 2020 8th International Electrical Engineering Congress (iEECON) (pp. 1-3). IEEE
Open this publication in new window or tab >>Geometrical Optimization of Jetting Duct
2020 (English)In: 2020 8th International Electrical Engineering Congress (iEECON), IEEE, 2020, p. 1-3Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents and evaluates three new designs of fibre optic cable ducts for jetting. The three designs are longitudinal ridges with square, triangular and semicircular geometries. The effects of the geometries are evaluated with regards to electrostatic force, fluid drag force and jetting length with limited push force. An optimal design is suggested, with triangular longitudinal ridges on the inner surface of the duct.

Place, publisher, year, edition, pages
IEEE, 2020
Keywords
jetting, blow fibre, duct optimization, fibre optic installation
National Category
Fluid Mechanics and Acoustics
Identifiers
urn:nbn:se:miun:diva-38981 (URN)10.1109/iEECON48109.2020.229492 (DOI)2-s2.0-85085055630 (Scopus ID)978-1-7281-3076-7 (ISBN)
Conference
2020 8th International Electrical Engineering Congress (iEECON)
Available from: 2020-05-04 Created: 2020-05-04 Last updated: 2020-06-02Bibliographically approved
Ahmad, J., Li, X., Sidén, J. & Andersson, H. (2019). An Analysis of Screen-Printed Stretchable Conductive Tracks on Thermoplastic Polyurethane. In: FLEPS 2019 - IEEE International Conference on Flexible and Printable Sensors and Systems, Proceedings: . Paper presented at IEEE Fleps 2019, IEEE International Conference on Flexible and Printable Sensors and Systems, Glasgow, Scotland, July 7-10, 2019. , Article ID 8792266.
Open this publication in new window or tab >>An Analysis of Screen-Printed Stretchable Conductive Tracks on Thermoplastic Polyurethane
2019 (English)In: FLEPS 2019 - IEEE International Conference on Flexible and Printable Sensors and Systems, Proceedings, 2019, article id 8792266Conference paper, Published paper (Refereed)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:miun:diva-36146 (URN)10.1109/FLEPS.2019.8792266 (DOI)2-s2.0-85071395576 (Scopus ID)978-1-5386-9304-9 (ISBN)
Conference
IEEE Fleps 2019, IEEE International Conference on Flexible and Printable Sensors and Systems, Glasgow, Scotland, July 7-10, 2019
Projects
SMART (Smarta system och tjänster för ett effektivt och innovativt samhälle)
Available from: 2019-05-15 Created: 2019-05-15 Last updated: 2019-09-19Bibliographically approved
Ahmad, J., Li, X., Sidén, J. & Andersson, H. (2019). An Analysis of Screen-Printed Stretchable Conductive Tracks on Thermoplastic Polyurethane.
Open this publication in new window or tab >>An Analysis of Screen-Printed Stretchable Conductive Tracks on Thermoplastic Polyurethane
2019 (English)Data set, Primary data
Abstract [en]

The table is a result from cyclic strain test with 25 % and 50 % elongations of screen-printed stretchable conductive tracks on thermoplastic polyurethane.

Keywords
Elongation test
National Category
Engineering and Technology
Identifiers
urn:nbn:se:miun:diva-36193 (URN)
Available from: 2019-05-23 Created: 2019-05-23 Last updated: 2019-09-19Bibliographically approved
Akram, S., Alam, F. M., Bertilsson, K. & Sidén, J. (2019). Capacitive and optical sensing for automatic detection and characterization of cleaning sponges in fiber optic microduct installations. In: Proceedings - 2019 8th International Workshop on Advances in Sensors and Interfaces, IWASI 2019: . Paper presented at 8th International Workshop on Advances in Sensors and Interfaces, IWASI 2019, Otranto, Italy, 13 June 2019 through 14 June 2019 (pp. 274-278). IEEE, Article ID 8791315.
Open this publication in new window or tab >>Capacitive and optical sensing for automatic detection and characterization of cleaning sponges in fiber optic microduct installations
2019 (English)In: Proceedings - 2019 8th International Workshop on Advances in Sensors and Interfaces, IWASI 2019, IEEE, 2019, p. 274-278, article id 8791315Conference paper, Published paper (Refereed)
Abstract [en]

Optical fiber duct installation requires blowing of cleaning sponges for dirt and moisture removal before blowing the fiber cables. The traditional method requires one operator that blows the sponge and one operator in the receiving end that manually evaluate the sponges until a dry sponge is received. The proposed system eliminates the need of a second operator by introducing a solution for automatic sponge detection and characterization of moisture in sponges at the receiving end. An optical sensor is used for detection and a capacitive sensor is developed to measure the sponge's wetness. Sensor data is automatically transmitted back to the operator at the feeding end via a mobile phone. The system is characterized to work with sponges ranging from saturated with wetness to what is deemed as dry. 

Place, publisher, year, edition, pages
IEEE, 2019
Keywords
Capacitive sensor, Optical fiber cable blowing, Optical Fiber Duct, Optical Sensor
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-37305 (URN)10.1109/IWASI.2019.8791315 (DOI)000502733100062 ()2-s2.0-85071433558 (Scopus ID)978-1-7281-0557-4 (ISBN)
Conference
8th International Workshop on Advances in Sensors and Interfaces, IWASI 2019, Otranto, Italy, 13 June 2019 through 14 June 2019
Available from: 2019-09-24 Created: 2019-09-24 Last updated: 2020-01-16Bibliographically approved
Li, X., Sidén, J., Andersson, H., Sawatdee, A., Öhman, R., Eriksson, J. & Genchel, T. (2019). Enabling paper-based flexible circuits with aluminium and copper conductors. IOP Flexible and Printed Electronics, 4, Article ID 045007.
Open this publication in new window or tab >>Enabling paper-based flexible circuits with aluminium and copper conductors
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2019 (English)In: IOP Flexible and Printed Electronics, ISSN 2058-8585, Vol. 4, article id 045007Article in journal (Refereed) Published
Abstract [en]

Implementing electronics systems on paper is an important area of flexible circuit technologies. One of the approaches is to print conductive inks onto paper substrates, on which silicon-based surface mount device components are mounted. However, one of the problems is that the printed conductors have unneglectable resistivity. In this paper, we present paper-based flexible circuits, using copper and aluminium conductors that are laminated onto paper substrates using a high-speed roll-to-roll method. Edge roughness inspections and repeated two-point bending tests are carried out to evaluate the manufactured flexible circuits. Three surface mount techniques are used to assemble standard surface mount device components onto the flexible circuits, including an isotropic conductive adhesive, an anisotropic conductive adhesive, and a low-temperature solder paste. Several characterizations are performed to the surface mount techniques, including contact resistance measurements, component bonding strength tests, assembled circuit bending tests, and scanning electron microscopy. The results of the characterizations suggest that flexible circuits made from Cu with paper substrate achieve satisfactory results for mechanical reliability, all surface mount techniques, and have the potential to be used on automatic component assembly lines. In order to test whether such flexible circuits and surface mount techniques can be used in implementing electronics systems, passive NFC tags with relative humidity sensing functionality are made, which are interrogated by an NFC equipped mobile phone.

Place, publisher, year, edition, pages
Temple Way, Bristol BS1 6HG, United Kingdom: , 2019
Keywords
paper substrate, copper and aluminium conductors, hybrid electronics, surface mounting tecniques, isotropical conductive adhesive, anisotropic conductive adhesive, low-temperature solder paste
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-38098 (URN)10.1088/2058-8585/ab5cef (DOI)000504314100002 ()2-s2.0-85081626216 (Scopus ID)
Projects
SmartArea
Available from: 2019-12-16 Created: 2019-12-16 Last updated: 2020-04-27Bibliographically approved
Li, X., Sidén, J., Andersson, H., Ahmad, J., Sawatdee, A., Öhman, R., . . . Genchel, T. (2019). Flexible Circuits Based on Aluminum Conductor and Nonwoven Substrate. In: 2019 IEEE International Flexible Electronics Technology Conference (IFETC): . Paper presented at 2019 IEEE International Flexible Electronics Technology Conference (IFETC) (pp. 1-4). IEEE
Open this publication in new window or tab >>Flexible Circuits Based on Aluminum Conductor and Nonwoven Substrate
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2019 (English)In: 2019 IEEE International Flexible Electronics Technology Conference (IFETC), IEEE, 2019, p. 1-4Conference paper, Published paper (Refereed)
Abstract [en]

Electronic textiles, integrating functional electronics circuits into fabric materials, are emerging as an important branch of flexible circuits. In this paper, we introduce a novel material combination for electronic textiles that can be used in implementing hybrid electronics. This type of circuits is fabricated by laminating patterned aluminum foils onto a nonwoven substrate in a high-speed roll-to-roll method. An isotropic conductive adhesive and an anisotropic conductive adhesive are used to assemble standard surface mount device components onto the fabricated circuits. The surface mount techniques are characterized by means of contact resistance measurements, component bonding strength tests, circuit bending tests, and scanning electron microscopy. An NFC tag with relative humidity sensing functionality is fabricated to evaluate the fabricated circuits to an electronic system level.

Place, publisher, year, edition, pages
IEEE, 2019
Keywords
Substrates, Bonding, Contact resistance, Surface resistance, Electrical resistance measurement, Sensors, Standards
National Category
Engineering and Technology
Identifiers
urn:nbn:se:miun:diva-38954 (URN)10.1109/IFETC46817.2019.9073775 (DOI)2-s2.0-85084665118 (Scopus ID)978-1-7281-1778-2 (ISBN)
Conference
2019 IEEE International Flexible Electronics Technology Conference (IFETC)
Available from: 2020-04-27 Created: 2020-04-27 Last updated: 2020-05-26Bibliographically approved
Akram, S., Bertilsson, K. & Sidén, J. (2019). LTspice electro-thermal model of joule heating in high density polyethylene optical fiber microducts. Electronics (Switzerland), 8(12), Article ID 1453.
Open this publication in new window or tab >>LTspice electro-thermal model of joule heating in high density polyethylene optical fiber microducts
2019 (English)In: Electronics (Switzerland), ISSN 2079-9292, Vol. 8, no 12, article id 1453Article in journal (Refereed) Published
Abstract [en]

At present, optical fiber microducts are joined together by mechanical type joints. Mechanical joints are bulky, require more space in multiple duct installations, and have poor water sealing capability. Optical fiber microducts are made of high-density polyethylene which is considered best for welding by remelting. Mechanical joints can be replaced with welded joints if the outer surface layer of the optical fiber microduct is remelted within one second and without thermal damage to the inner surface of the optical fiber duct. To fulfill these requirements, an electro-thermal model of Joule heat generation using a copper coil and heat propagation inside different layers of optical fiber microducts was developed and validated. The electro-thermal model is based on electro-thermal analogy that uses the electrical equivalent to thermal parameters. Depending upon the geometric shape and material properties of the high-density polyethylene, low-density polyethylene, and copper coil, the thermal resistance and thermal capacitance values were calculated and connected to the Cauer RC-ladder configuration. The power input to Joule heating coil and thermal convection resistance to surrounding air were also calculated and modelled. The calculated thermal model was then simulated in LTspice, and real measurements with 50 µm K-type thermocouples were conducted to check the validity of the model. Due to the non-linear transient thermal behavior of polyethylene and variations in the convection resistance values, the calculated thermal model was then optimized for best curve fitting. Optimizations were conducted for convection resistance and the power input model only. The calculated thermal parameters of the polyethylene layers were kept intact to preserve the thermal model to physical structure relationship. Simulation of the optimized electro-thermal model and actual measurements showed to be in good agreement. 

Keywords
Cauer network, Electro-thermal model, Foster network, High-density polyethylene, RC-ladder, Thermal capacitance, Thermal resistance
Identifiers
urn:nbn:se:miun:diva-38208 (URN)10.3390/electronics8121453 (DOI)000506678200080 ()2-s2.0-85075926885 (Scopus ID)
Available from: 2020-01-10 Created: 2020-01-10 Last updated: 2020-01-31Bibliographically approved
Ahmad, J., Andersson, H. & Sidén, J. (2019). Screen Printed Piezoresistive Sensors for Monitoring Pressure Distribution in Wheelchair. IEEE Sensors Journal, 19(6), 2055-2063
Open this publication in new window or tab >>Screen Printed Piezoresistive Sensors for Monitoring Pressure Distribution in Wheelchair
2019 (English)In: IEEE Sensors Journal, ISSN 1530-437X, E-ISSN 1558-1748, Vol. 19, no 6, p. 2055-2063Article in journal (Refereed) Published
Abstract [en]

Prolonged sitting inadequacies cause pressure ulcer to many individuals, especially to disadvantaged with reduced mobility. The measurement of distributed pressure and detection of irregular sitting postures is essential for preventing the risk of developing pressure ulcer. In this paper, a pressure sensing system capable of recognizing sitting postures by means of measuring interface pressure through printed pressure sensors is presented. A thin and flexible large area sensor is screen-printed using silver flake and carbon particle inks and comprises 16 sensing elements. For the evaluation of practical usability, the sensor characterization is carried out by conducting stability, repeatability, drift and bending tests. The performance of the sensor is checked under varying environmental conditions. Sitting posture detection accuracy above 80 % is achieved using a classification algorithm for four different sitting postures. Pressure distribution is monitored at a scanning rate of 10 Hz. A low power and small form factor of read-out electronics enables a compact packaging inside the seat cushion. The presented sensor design targets smart wheelchairs, but it is extendable to much larger areas, for example to be used in beds. The proposed sensing system would be of a great assistance for caregivers and health professionals.

Place, publisher, year, edition, pages
IEEE, 2019
Keywords
Pressure sensors, wheelchair, conductive inks, sitting posture recognition, pressure mapping, screen-printing
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-35133 (URN)10.1109/JSEN.2018.2885638 (DOI)000459513100009 ()2-s2.0-85058158693 (Scopus ID)
Projects
SMART (Smarta system och tjänster för ett effektivt och innovativt samhälle)
Available from: 2018-12-10 Created: 2018-12-10 Last updated: 2019-10-16Bibliographically approved
Li, X., Sidén, J., Andersson, H. & Schön, T. (2018). A Paper-Based Screen Printed HF RFID Reader Antenna System. IEEE Journal of Radio Frequency Identification, 2(3), 118-126
Open this publication in new window or tab >>A Paper-Based Screen Printed HF RFID Reader Antenna System
2018 (English)In: IEEE Journal of Radio Frequency Identification, ISSN 2469-729X, Vol. 2, no 3, p. 118-126Article in journal (Refereed) Published
Abstract [en]

Screen printing is a stencil process where conductive inks are patterned onto substrates through a fine mesh of threads. Nowadays, screen printing can be used to print RFID antenna structures onto flexible and ultra-low-cost substrates such as pa-per. In this manuscript, we present an HF RFID reader antenna system, operating at 13.56 MHz, using screen printed Ag particle ink as conductor and using HP photo paper as substrate. The proposed antenna system comprises four loop antenna elements, matched to 50 Ω, and one I2C addressed SP4T multiplexer circuitry, controlled through an exterior embedded system. The geometries, designs and characterizations of the antenna system are described in the manuscript in details. Measurement results show that the antenna system has low power reflections and a suitable Q factor. It has a maximum 11.1 cm RFID tag read range at an antenna system input power of 33 dBm. 2D RFID tag positioning can be enabled by utilizing the RFID tag interrogation zones formed by the four loop antenna elements. In addition, a parametric study is carried out to investigate the effect of loop antenna element DC resistance on the antenna element performance. It can be concluded that the proposed method can be used to create low-cost and large-area HF RFID reader antenna systems.

Place, publisher, year, edition, pages
445 Hoes Lane Piscataway, NJ 08854, USA: IEEE, 2018
Keywords
HF reader antenna system, 13.56 MHz, screen printed, paper substrate
National Category
Paper, Pulp and Fiber Technology Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-34384 (URN)10.1109/JRFID.2018.2869494 (DOI)
Projects
IDPOS
Available from: 2018-09-12 Created: 2018-09-12 Last updated: 2020-04-27Bibliographically approved
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