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This dissertation presents new circuit architectures and techniques for improving the performance of several key BiCMOS RFIC building blocks used in radar and wireless communication systems operating up to millimeter-wave frequencies, and the development of an advanced, low-cost and miniature millimeter-wave concurrent dual-band transmitter for short-range, high-resolution radar and high-rate communication systems. A new type of low-power active balun consisting of a common emitter amplifier with degenerative inductor and a common collector amplifier is proposed. The parasitic neutralization and compensation techniques are used to keep the balun well balanced at very high frequencies and across an ultra-wide bandwidth. A novel RF switch architecture with ultra-high isolation and possible gain is proposed, analyzed and demonstrated. The new RF switch architecture achieves an ultra-high isolation through implementation of a new RF leaking cancellation technique. A new class of concurrent dual-band impedance matching networks and technique for synthesizing them are presented together with a 25.5/37-GHz concurrent dual-band PA. These matching networks enable simultaneous matching of two arbitrary loads to two arbitrary sources at two different frequencies, utilizing the impedance-equivalence properties of LC networks that any LC network can be equivalent to an inductor, capacitor, open or short at different frequencies. K- and Ka-band ultra-low-leakage RF-pulse formers capable of producing very narrow RF pulses in the order of 200 ps with small rising and falling time for short-range high-resolution radar and high-data-rate communication systems are also developed. The complete transmitter exhibiting unique characteristics obtained from capabilities of producing very narrow and tunable RF pulses with extremely RF leakage and working concurrently in dual bands at 24.5 and 35 GHz was designed. Capability of generating narrow and tunable RF pulses allows the radar system to flexibly work at high and multiple range resolutions. The extremely low RF leakage allows the transmitter to share one antenna system with receiver, turn on the PA at all time, comply the transmitting spectrum requirements, increase the system dynamic range, avoid harming to other systems; hence improving system size, cost and performance. High data-rate in communication systems is achieved as the consequence of transmitting very narrow RF pulses at high rates. In addition, the dissertation demonstrates a design approach for low chip-area, cost and power consumption systems in which a single dual-band component (power amplifier) is designed to operate with two RF signals simultaneously.

Ungdomsbrottsligheten har studerats och diskuterats i en uppsjö av olika sammanhang, medmer eller mindre lyckade resultat. Två teorier, som under de senaste halvseklet har försökthitta svar på detta komplexa problem, står Travis Hirschi och John Braithwaite bakom. Deutvecklade teorin om sociala band (1969) respektive återintegrerande skambeläggning (1989),där framförallt den förstnämnda fått en stor genomslagskraft inom den kriminologiskaforskningen, medan den senare är något mer okänd. Men kan dessa två teorier förklaraungdomsbrottslighet? Genom att formulera en enkätundersökning, som kom att besvaras av82 gymnasietreor, skapades ett kvantitativt material att granska. Eftersom tidigare forskningbåde gett stöd, men även kritiserat teorierna, blev det intressant att undersöka vad detta arbetekunde uppnå för resultat. Respondenterna i enkätundersökningen fick besvara frågor om sinarelationer till de sociala banden, till skambeläggning samt uppge brottsliga förehavanden ochbrottsbenägenhet. Resultatet tyder på att brottsbenägenheten är skiftande, och att intresset för brottslighet ärnärvarande. Kopplat till de sociala banden återfinns ett antal signifikanta samband, därresultaten visar att band till föräldrarna är betydande, framför allt förhållandet till mödrarna.Att hitta stöd för återintegrerande skambeläggning är svårt, men det finns tydliga sambandmellan brottslighet, sociala band och skambeläggning. Exempelvis finns det ettanmärkningsvärt samband mellan känslor vid skambeläggning och det sociala bandetåtaganden, där främst vuxenhet är betydande.

The UHF band between 470-790 MHz, currently occupied by digital ter- restrial TV (DTT) distribution in Europe, is widely regarded as a premium spectrum band for providing mobile coverage. With the exponential increase in wireless data traffic in recent years, there has been growing interests in gaining access to this spectrum band for wireless broadband services. The secondary access in TV White Space is considered as one cost-effective way to reuse the spectrum unoccupied by the primary DTT network. On the other hand, the declining influence of DTT and the converging trends of video con- sumption on TV and mobile platforms are new incentives for the regulator to reconsider the optimal utilization of the UHF broadcast band. The proposal to re-farm the UHF band for a converged content distribution network was born under theses circumstances. This thesis intends to develop a methodology for evaluating the technical performance of these options for utilizing UHF broadcast band and quantify- ing their gains in terms of achievable extra capacity and spectrum savings. For the secondary access in TV white space, our study indicates a considerable po- tential for low power secondary, which is mostly limited by the adjacent chan- nel interference generated from the densely deployed secondary devices due to the cumulative effect of multichannel interference. On the other hand, this potential does not translate directly into capacity for a WiFi-like secondary system based on CSMA/CA protocol, as the network congestion and self- interference within the secondary system has a greater impact on the network throughput than the primary interference constraint. Our study on the cellular content distribution network reveals more po- tential benefits for re-farming the UHF broadcast band and reallocating it for a converged platform. This platform is based on cellular infrastructure and can provide TV service with the same level of quality requirement as DTT by delivering the video content via either broadcast or unicast as the situa- tion dictates. We have developed a resource manage framework to minimize its spectrum requirement for providing TV service and identified a significant amount of spectrum that can be reused by the converged platform to provide extra mobile broadband capacity in urban and sparsely populated rural areas. Overall, we have arrived at the conclusion that the concept of cellular con- tent distribution in a re-farmed UHF band shows a more promising prospect than the secondary access in TV white space in the long run. Nevertheless, low power secondary is still considered as a flexible and low-cost way to exploit the underutilized spectrum in the short term, despite its uncertainty in future availability. On the other hand, the re-farming of UHF broadcast band is a long and difficult regulation process with substantial opposition from the in- cumbent.The results from this study could serve as input for future regulatory decisions on the UHF band allocation and cost-benefit analysis for deploying new systems to access this spectrum band. / <p>QC 20140609</p> / EU FP7 QUASAR / EU FP7 METIS

Piezoelectric energy harvester has become a new powering choice for small electronic device. Due to its piezoelectric effect, electric energy can be obtained from ambient vibrations. This thesis is intending to build a frequency-adjustable piezoelectric energy harvester system. The system is structured with two piezoelectric bimorph beams, which are connected to each other by a spring. The feasibility of the frequency-adjustable piezoelectric energy harvester has been proved by investigating effects of the spring, loading mass and impedance on the operation frequencies.

Contours is scored for full wind ensemble and percussion, and is approximately nine minutes in length. The title refers to the way melodic shape or contour is used to create unity and variety in the piece. Contours is a single-movement work containing three sections that are unified by thematic and harmonic materials. The melodic material is generated by three twelve-tone rows, which are then used in combination with freely composed material. The first and last sections are highly contrapuntal and rhythmically disjunct. Both sections share common rhythmic and melodic patterns. These sections are contrasted with a slower and more lyric middle section. This section is made of a series of episodes that create an overall A-B-A structure.

Persistence is a composition scored for piccolo, 2 flutes, 2 oboes, English horn, 2 bassoons, E-flat clarinet, 3 1st B-flat clarinets, 3 2nd B-flat clarinets, 3 3rd B-flat clarinets, bass clarinet, 2 E-flat alto saxophones, B-flat tenor saxophone, E-flat baritone saxophone, 3 B-flat trumpets, 4 French horns in F, 2 trombones, bass trombone, baritone, tuba, timpani, and 4 auxiliary percussionists. The music consists of three movements, fast-slow-fast, lasting approximately eleven and one-half minutes. The three movements last three minutes and twenty seconds, five minutes and thirty seconds, and three minutes and ten seconds respectively.

Since its invention, phased array has been extensively applied in both military and civil areas. The applications include target detecting and tracking, space probe communication, broadcasting, human-machine interfaces, and remote sensing. Although the phased array applications show a broad range of potential market, there are some limitations of phased array's development: high cost, complex structure, narrow bandwidth, and high power consumption. Therefore, novel ideas are needed to reduce these constraints. In this thesis, several new approaches about the design and application of phased array are presents. First, the principle of phased array and fundamental design equations are introduced. Second, a new application of phased array antenna for radar respiration measurement is presented. By integrating a 4×4 Butler matrix with four-element antenna array, there will be four distinct main beams in radiation pattern. This new approach can improve the measurement accuracy and realize a high detecting rate. Third, a compact phased array antenna system based on dual-band operations is introduced. Dual-band function can make N-antenna system obtain 2N unique radiation beams (N is an integer) and achieve a significant size reduction compared to the conventional single-band system. To verify the design concept, a four-element phased array antenna working at 5GHz and 8GHz is designed and fabricated. The measurement results make a good agreement with the simulations. Finally, a novel architecture of steering phase feeding network by using bi-directional series-fed topology is presented. This bi-directional series-fed network needs less phase shifters and realizes steering phase function by applying control voltage.

This thesis presents a brief introduction to microwave components and technology. It also presents two novel dual-band designs, their analysis, topology, simulation and fabrication. In chapter 2, a novel dual-band bandpass filter using asymmetric stub-loaded stepped-impedance resonators (SLSIRs) operating at 1 and 2.6 GHz is shown. This type of design applies suitable arrangements to improve the filter’s performance. Then, in chapter 3, a novel dual-band balun (transforms unbalanced input signals to balanced output signals or vice versa) operating at 1.1 and 2 GHz with flexible frequency ratios is presented, which has more advantages in microwave applications. Then, conclusion and future works are discussed in chapter 4.

It is the purpose of this thesis to list and evaluate the published materials for junior high school band that the director may have a comprehensive knowledge of materials adapted to that level.