This paper proposes novel PIFA and monopole designs for dual-band or multi-band wireless communications, especially for mobile phones and CF (compact flash) card. The dual-frequency designs for mobile phone mainly utilize one or more metal branch strips to excite two resonant modes. By tuning the dimensions of branch strips, the ratio of the antenna¡¦s first two resonant frequencies can be achieved to be about 2.0, which makes it very promising for 900/1800 MHz operations. In addition, the broadband and quad-band (AMPS/GSM/DCS/PCS) designs for mobile phone application are also proposed. The broadband antenna design, unlike the above-mentioned dual-frequency designs for operating at two separate resonant modes, is more suitable to cover several nearby communication bands (DCS/PCS/UMTS/WLAN 2.45 GHz). The quad-band antenna design utilizes a £k-shape matching bridge to achieve a wider bandwidth both in lower and higher bands. For CF Card application, the triangular chip antenna having one longer and one shorter strip lines can generate the lower and higher modes covering the WLAN 2.4 and WLAN 5.2/5.8 GHz bands. All the antenna designs proposed are very promising to be concealed within the housing of the mobile phones or CF card.

In this thesis, the study mainly focuses on the terrestrial DTV signal reception antenna. These antennas are designed based on the use of planar dipole antenna, but with different techniques in order to overcome the narrow-bandwidth problem of conventional dipole antenna. In ¡§Broadband Three-arm Dipole Planar Antenna for DTV Signal Reception,¡¨ a metal plate is added for achieving wideband operation. In ¡§End-fed Modified Dipole Antenna for DTV Signal Reception,¡¨ two arms of different lengths are extended in the same direction to wideband operation. In ¡§Internal DTV Antenna for Folder-Type Mobile Phone,¡¨ two system ground planes are regarded as the two arms of the dipole. With the use of an internal matching circuit, good impedance matching can be obtained for receiving DTV signal over a wide bandwidth.

The applications of mobile phone provide limitless convenience to people¡¦s life. 3G mobile phone provides a great contribution to communications due to wide range bandwidth. 3G mobile phone is able to economize on communicating time and space. Therefore, it plays an important role in the currently mobile market. In addition the governments have devoted much resource on 3G mobile learning as the hardware and software. The study aims to examine the female consumers of 3G mobile phone and consider the market of mobile phone industry, mobile phone technology and further development of mobile phone. Related literatures are sourced from the develop background of the current mobile market, demand of the mobile phone market and consumer characteristics in order to filter out the priority setting of those six categories as follows: network connection, hardware design, safe internet, business model and the mobile service of convenient and appreciations. Beside this, it also presents that the priority setting might change as a matter of time. Research method is Analytic Hierarchy Process (AHP). In the project, questionnaire results provide the bulk of the data, with the interviews intended to provide a more contextual element to the work. The questionnaire was developed and sent out to female consumers of 3G mobile phone; and the interviews were carried out with some professors of 3G mobile leaning. The results of this study suggested that the main female consumers of 3G mobile phone are young ladies who have higher education and these consumers need to receive a lot of information to help them handle works. In addition it can help them to develop the commutations. In other words, 3G mobile phone can bring more convenient in life and work. Meanwhile, the key point to promote the 3G mobile phone is the service of applications; especially the service refers to the characteristics of 3G mobile phone. For female consumers, service design should focus on female characteristics of life and special demands. For example, the service of fixing and tracking design is better for married women who have children; the service of providing life information is suit for young business ladies. After developing the service of applications, users will be used to 3G mobile phone. Then, it could be successful to expand the 3G mobile phone market of the female consumers.

Cryptographic Message Syntax (CMS) is a standard for protecting messages cryptographically. Using CMS, messages can be protected in different content types such as signed-data, enveloped-data, digested-data and authenticated-data. CMS is architected around certificate based key management and symmetric cryptography. In this thesis, a lightweight CMS envelope is proposed for the mobile phones which have limited memory and processing power, in order to provide the privacy of the data either stored on them or exchanged by means of multimedia messaging (MMS) and e-mail. A sample prototype is implemented on mobile phone which makes use of the proposed lightweight CMS. The prototype is compared with standard CMS in terms of application size and performance. The application size decreases approximately by 35% and the envelope preparation duration is much shorter with lightweight CMS in comparison to standard CMS.

Abstract The market environment of Mobile Phone Industry has had rapid change in the past decade. It is almost same important to gain the loyalty of existing customers as to gain the new customers in the current competitive environment. For many companies in this industry, Customer Relationship Management has been become a significant issue in their strategies. This research is based on the concept of Customer Relationship Management. The purposes of this research are to probe the performance of Customer Retention Programs and the churn reason in mobile phone industry. The research datum were collected from TAT Corp.(TransAsia Telecommunications) including Customer Retention Programs as ¡§Second Honeymoon Program¡¨, ¡§New Second Honeymoon Program¡¨ and ¡§Talking Reward Program¡¨ and a survey from the customers who had been deactivated in February and March of the year 2002. The analysis of the retention programs show significantly relevant on AGE, GENDER, CUSTOMER LEVELS, TENURE, and RATE PLAN factors. The inspection results of survey datum in the churn reasons are explained individually. The suggestions are made after discussing the policies and strategies of TAT Corp.

In this dissertation, different from the conventional PIFA structure, the novel internal loop and slot antennas suitable for multiband mobile phone application are proposed. The loop antennas here use the technique of meandering the loop pattern to control the frequency ratio of the three resonant loop modes, and then the multiband operation can be obtained. For the slot antenna, different from the conventional slot antenna operating in a half-wavelength, the monopole slots antenna operating in it¡¦s quarter-wavelength mode are proposed. By properly adjusting the position of the monopole slot and the tuning stub of the microstrip feedline, the monopole slot antenna can achieve the multiband operation with a small occupied area in the mobile phone. In addition, the user¡¦s hand and head effects on the loop antenna are also studied. The obtained results indicate that, when the user¡¦s hand and head is close to or cover a certain portion of the antenna, large decrease in the antenna¡¦s radiation efficiency and great distortion in the antenna¡¦s radiation pattern will occur for all the three excited resonant modes of the loop antenna, no matter the unbalanced or balanced modes. Further, the efficiency drops caused by the user¡¦s hand and head over the GSM900 band are much larger than that over the GSM1800/1900 bands.

In this dissertation, the study mainly focuses on small-size multiband mobile phone antennas for practical applications. Loop antenna is chosen to be the antenna type for designing the compact internal multiband antenna. Four antenna designs are presented, including ¡§Compact Multiband Folded Loop Chip Antenna for Small-Size Mobile Phone¡¨, ¡§Very-Small-Size Folded Loop Antenna with a Band-Stop Matching Circuit for Penta-Band Mobile Phone Application¡¨, ¡§Very-Small-Size Printed Loop Antenna for GSMDCSPCSUMTS Operation¡¨, and ¡§Printed Loop Mobile Phone Antenna with an Internal Printed Matching Circuit¡¨. The first two antenna designs occupy a volume of 1.0 cm3 and 0.6 cm3 respectively and the last two antenna designs are to be directly printed on the system circuit board of the mobile phone. Either of them can operate as a quad-band antenna for GSM/DCS/PCS/UMTS operation or as a penta-band antenna for GSM850/900/1800/1900/UMTS operation.

The touchscreen smartphone platform is inherently flexible, giving it the potential to meet the needs and desires of individuals diverse in age and ability. Despite universal design research efforts providing industry with guidance to address this opportunity, current designs fall short. The disconnect stems from differing priorities in design and development and opposing approaches to defining and grouping the user population. The research presented in this dissertation aims to remove these issues from the process of discovering touchscreen smartphone design opportunities. It focuses on users' prior and desired customizations rather than ability- or market-factors. Data were collected on participants' devices' out-of-the-box, current and desired device states along with related stories about their actual and desired device modifications. Template and image analyses identified patterns in the data, which also revealed an underlying structure for organizing and presenting participants' needs and desires associated with smartphone touchscreen customizations. The needs and desires suggest opportunities for industry to shift towards universal design. The structure offers an approach to addressing the gaps between the ability-centered and market-driven approaches to the design of consumer technology.

<p>The purpose with this study is to find out how the mobile phone and the Village Pay Phone from Grameen Telecom have been implemented into women’s life in rural Bangladesh. It also aims to study how the women have become empowered by this program. The sample constitutes sixteen female owners. A purposeful cluster sampling was used to depict six villages from various parts of Bangladesh. When arriving in the villages a snowball sampling method was used to find female VPP owners. The sampling method was chosen to include a sample of various characteristics. The study has a hermeneutic phenomenological approach, which aims to find out how the women experience the VPP and what meaning the women put in it. To collect empirical data interviews with open questions were used that opened up for conversation and the possibility to understand a range of experiences and nuances of meanings. The findings indicate that the majority of the women handed over the VPP to their husband or a male relative. The reason why is the families’ pressure on them to adjust to Purdah and seclusion, too much domestic work, lack of education, or because of the attitude among men and women both that business is a male domain. The study shows that women mostly gained some prestige. Also, they got a greater self-esteem to meet strangers since the VPP made them meet more people. But it has also brought quarrels and broken some friendships. All women are now more able to call family and relatives when they needed or wanted to and said that they have full access to use the mobile phone for this purpose. Still many are put in a dependency relation to others as they need help to use it. The women, however, are no longer owners of a status symbol because the mobile phone is more available for others today, but they are still known by name. Their homes do no longer attract visitors as it once did during the initiation of the program. There has also been a significant decrease in demand for the VPP that has lessened the income much and some have become even poorer from the VPP and women seldom benefitted personally from the profit. A few of the women mentioned that the family atmosphere had improved but most of them did not say that they had gained influence in the family as a result of the VPP.</p>

Mobiltelefonen som ett objekt har en stor betydelse för ungdomarna i dagens samhälle. Unga människor uppfattar sin mobiltelefon som en förlängning av sig själva och kan inte uthärda tanken på att vara borta från den. Men i olika situationer som tillexempel ett reklamationstillfälle, har den unga konsumenten inget annat val än att lämna in sin mobiltelefon för reparation. Reklamation är något som är oundvikligt och kan ses som ett misslyckande i sig, men det är hanteringen av reklamationen som avgör om den anses vara lyckad eller misslyckad för kunden.Denna studie syftade till att undersöka relationen mellan den unga konsumenten och deras mobiltelefon och hur detta förhållande kan påverka varför de uppfattar en reklamation som misslyckad. Genom sju intervjuer har vi bett våra respondenter att prata om deras specifika reklamationstillfälle och hur de använder sin mobiltelefon i vardagen.Resultaten visade att de främsta anledningarna till att våra respondenter funnit sin hantering av reklamationen som ett misslyckande berodde på faktorer såsom väntetid, merkostnader, dålig ersättningsprodukt och ovänliga personal. Det visade också att våra respondenter har en anknytning till sin mobiltelefon och på grund av detta förhållande kan ovannämnda faktorer komma att ändras beroende på hur fästa en individ är till hans eller hennes produkt. / The mobile phone as an object has a great meaning for the youth in today's society. Young people perceive their mobile phone as an extension of themselves and cannot bear the thought of being apart from it. However, in different situations such as a customer complaint handling, the young customer has no other option but to hand it in for reparation. The customer complaints is something that is unavoidable and can be seen as a failure in itself but it is the handling of the customer complaint that decide if a customer complaint has been successful or not.This study aimed to investigate the relationship between the young consumer and their mobile phone and how this relationship might affect why they perceive a customer complaint handling as failed. Trough seven conducted interviews we asked our respondents to talk about their specific customer complaint situation and how they use their mobile phone.The results showed that the main reasons why our respondents found their complaint handling as failed depended on factors such as, waiting time, additional costs, poor substitute product and unfriendly personnel. It also showed that our respondents have an attachment to their mobile phone and because of this relationship the aforementioned factors might change dependent on how attached an individual is to his or her product.