An external end of each of the spiral inductors can be coupled by a via to opening in ground planes provided on external surfaces of the pc board. The inductor device comprises a dielectric substrate. Eddy current modeling fo r a one layer, three turn spiral showing 46 the coupling coefficients between the different inductors 20. In general, the invention is directed to a tunable inductor that makes use of eddy current effect to tune the inductance of an inductor. Also explore the seminar topics paper on tunable spiral inductors with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year ieee applied electronics ae in btech, be, mtech students for the year 2015 2016. Active inductor based tunable impedance matching network for rf power ampli. Manufacture and characterization of high qfactor inductors based. This paper presents the use of a new structure of active inductor named cascoded flippedactive inductor casfai in a ttype highpass tunable output matching network of a classe rf power amplifier rfpa to control the output power and enhance the efficiency. Design of tunable metamaterial based onchip spiral inductor. Complete tuning range is reached within the boundaries of the coil form. An understanding of the microstructureproperty relationship is essential in the design optimization of the assembly process.
Accurate modeling of spiral inductors on silicon using. The change of spiral height resulted in an inductance variation. As one of the three fundamental components for electronic circuits, inductors have been extensively used in a variety of applications such as power delivery, voltage regulation, microwave and rf radiofrequency integrated circuits. A novel memsbased tunable meander inductor is proposed and characterised. Design of cmos tunable imagerejection lownoise amplifier. Furthermore, active inductor usually has higher q compared to spiral inductor, thus eliminating the need for active compensation circuits that are usually noisy and dissipate more power. The tunable inductor structures can be electrically modeled by using awr design environment software. For integrated radiofrequency applications, tunable magnetic inductors are expected. The designed casfai behaves as an inductor in the frequency range of 06. This geometry provides symmetrical inductors in a single coil.
A complete schemati c of a three turn, two layer spiral with a 49. This tunable spiral inductor is designed in order to be used in rf circuits such as. This paper presents a tunable inductor using mems technology. This method does not increase the resistance of the spiral inductor as we are not increasing the physical length of the spiral, but we are increasing the coupling. Inductance calculation and layout optimization for planar spiral inductors, int.
In 10, rf mems tunable inductor was on the bimorph effect of amorphous silicon. A first conductive line is disposed on a first surface of the dielectric substrate. The tunability can be further improved over the horizontal. The tunability is reduced when the number of turns of the spiral is increased. The equivalent electrical model for single line coil inductor figure 1a and the equivalent electrical model for dual line coil inductors figures 1b and 1c are shown in figures 5a and 5b, respectively. Tai is one of the good candidates due to its small size, high, widely tunable inductance, and large inductance compared to those of the spiral inductor 17, 18. The proposed variable inductor is perspective key component for the multiband.
A high qfactor qualityfactor spiral inductor fabricated by the. Mechanicallyguided assembly allows the formation of 3d spiral shaped inductors through controlled buckling, which could provide an increased quality q factor and broadened working angle in near field communication, as compared to the planar design. The inductor pattern 220 comprise a spiral pattern which is well known to provides the inductive characteristic of the structure 200. Fabrication of integrated chip with microinductors and microtunable. A wide tuningrange cmos vco with a tunable active inductor. Optically tunable spiral inductor for rf applications. Jeongil kim, and dimitrios peroulis tunable mems spiral inductors with. Pdf memristors have proven to be an attractive feature for memory, logicinmemory, and neuromorphic computing. Us20150556a1 us14080,2 us20140802a us2015556a1 us 20150556 a1 us20150556 a1 us 20150556a1 us 20140802 a us20140802 a us 20140802a us 2015556 a1 us2015556 a1 us 2015556a1 authority us united states prior art keywords region metal transistor source drain prior art date 201114 legal status the legal status is an. Chebyshev bandpass filter using resonator of tunable active capacitor and inductor. Us6380608b1 multiple level spiral inductors used to form. Request pdf design of tunable metamaterial based onchip spiral inductor this paper presents an innovative and practical architecture for tunable spiral inductor with high quality factor q. Adjustable inductors inductors, coils, chokes digikey. The drawback to the spiral inductor is that the breaching of shorts across the spiral segment produces results that are not precisely predictable and of coarse granularity.
Design and optimization of a 10 nh squarespiral inductor. Oscillator tunable by varying current in spiral inductor. Major military customers have used our qpl products for their reliability and tight quality control. Tunable spiral inductors seminar report, ppt, pdf for applied. This is to certify that the thesis entitled optimization of planar spiral inductor and design of multilayer pyramidal inductor for silicon radio frequency integrated circuits submitted by genemala haobijam, a research student in the department of electronics and communication engineering, indian institute of technology, guwahati, for the. Analysis, design, and optimization of spiral inductors and tra. The spiral inductor is manufactured on a silicon substrate. Unfortunately, active inductors have poor noise per. Pdf in this paper, fabrication and performance of rf mems planar spiral inductors. Chebyshev bandpass filter using resonator of tunable. A complete schematic of a three turn, two layer spiral with the loss 48 mechanisms modeled all coupling coefficients not shown 21. The invention provides tunable embedded high frequency inductor devices. Optimization of planar spiral inductor and design of. Piconics tunable inductors feature excellent stability, high q and controlled.
The proposed filter layout is implemented and simulated in ansys designer. High precision, tight tolerance construction methods and quality control give consistent, controlled performance. Active inductorbased tunable impedance matching network. A lot of research was implemented to achieve high inductance density, low resistance and high quality factor. Proceedings of the ieee wireless and microwave technology conference, pp 15 pacurar c, topa v, racasan a, munteanu c. Pdf high performance mems spiral inductors researchgate. A second conductive line is disposed on a second surface of the dielectric substrate. The electrostatic method is employed for tuning the inductor by the movement of cantilever beam downward and changing the value of magnetic flux. Design and simulation of rf mems tunable spiral inductor. Efield tunable rf integrated multiferroic inductors and. The total inductance of the tunable spiral inductor lt can be given by ll m mt. Design of mems tunable inductor implemented on soi and. Imagerejection lownoise amplifier with active inductor 33 be eliminated.
Design and analysis of a high quality factor multipath. An interconnection is disposed perforating the dielectric substrate and connecting the first. Theq of the spiral inductor is usually low, this being due to the wiring and substrate losses. So, the target of this project is to design a 10nh square spiral inductor with high quality factor q. Explore tunable spiral inductors with free download of seminar report and ppt in pdf and doc format. The effective inductance of single line coil inductor is assumed to be. There are only a few mems approaches to tunable inductors so far 24. Tunable spiral inductors seminar report, ppt, pdf for. When the additional conductor is in the horizontal plane of the spiral inductor, a two. Two types of spiral inductor were fabricated and the measured results. Pdf for integrated radiofrequency applications, tunable magnetic inductors are expected. The similar previous works for tunable mems inductor employing ferromagnetic cores and liquidbased spiral inductors could not exceed an operating frequency of 2 ghz and a q factor of 12. Memristor based planar tunable rf circuits journal of. Spiral inductors are provided on multiple internal layers of a printed circuit pc board and configured to form a filter.
Optically tunable spiral inductor for rif applications. Using such vias, the external end of each of the spiral inductors can be coupled by lumped elements, such as a capacitor, an. Unlike tunable spiral inductors, the meander tunable inductor is implemented using a single metal layer, thereby reducing the fabrication complexity. Niknejad master of philosophy in engineeringelectrical engineering and computer sciences university of california professor robert g. The tunable inductor may include a spiral or helical inductor in proximity to one or more sets of eddy current coils.
The tunability of an inductor using an additional conductor segments with optical switching is presented. Variable inductors are available at mouser electronics. Optically tunable spiral inductor for rif applications core. In 9, a spiral inductor was fabricated, with the flexible metal film. Nieuwoudt a, massoud y 2006 optimizing the design of tunable spiral inductors for onchip wireless applications. The solution is to find the number of turns and all dimensions of the square spiral inductor.