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Design and Optimization of Antenna for Mimo Systems Via Heuristic Algorithms

Thesis Info

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External Link

Author

Zubair, Muhammad

Program

PhD

Institute

Iqra University

City

Islamabad

Province

Islamabad

Country

Pakistan

Thesis Completing Year

2014

Thesis Completion Status

Completed

Subject

Commerce

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/2139/1/2389S.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676724593554

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The radiation pattern and other electrical characteristics of an antenna primarily depend on its size and geometry. In the current age of communications, it is highly desirable to have compact and light weight communication devices. Therefore the most challenging issue of today’s wireless communication systems is to design antennas which are cost effective and of compact size without compromising the radiating efficiency and effectiveness. Since microstrip patch antennas are light weight, compact, easy to design and install; they are the best choice for today’s communication devices. That’s why patch antennas are widely used in numerous wireless applications as a single radiating element and as an array of multiple elements. However, designing of different shaped antennas to suit the electrical and/or physical requirements of the communication system is not an easy task. In this dissertation we have successfully designed microstrip patch antennas to achive desired electrical charcteristics such as frequency, bandwidth and quality factor alongwith the targeted physical characteristics such as length, radius or area etc. Keeping in mind the utilization of various shapes of antennas in communication systems; the dissertation includes designing of different geometrical shaped patch antennas such as square, circular and hexagonal. In addition to design patch antennas, we have succefully designed array of patch elements to be used in MIMO systems. The array has been designed for the desired electrical characteristics such as directivity, frequency, and return loss etc. Moreover, using this array design model, we estimated the channel capacity for ferquency selective Rayleigh fading channel. Since ultra wide band frequency systems are suitable for high data rates with low power consumption, we have particularly focused on this range of frequncy for antenna designing. Among all the heuristic approaches, literature shows that particle swarm optimization (PSO) and genetic algorithm (GA) are the most efficient and effective heuristic approaches in solving the problems of antenna and electromagnetics. Therefore we have employed these two approaches for designing and optimizing these antennas. We have also developed a new heuristic algorithm namely Wildebeest Herd Optimization (WHO) algorithm. It is based on the living wildebeest in their herd and migrating from one point to another for food and water. All the multi-geometrical antennas have been designed and optimized on WHO in addition to GA and PSO. The comparative analysis verifies that the proposed algorithm is more effective and efficient than the existing heuristic approaches. Moreover, artificial neural network (ANN) is employed to model the electrical/magnetic behavior of single antenna and arrays. The outcome of ANN models are compared with the results of numerical computational software Ansoft HFSS. In the light of this work, various future recommendations are also given at the end.
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خواجہ حسن نظامی

خواجہ حسن نظامی
افسوس ہے کہ گذشتہ مہینہ ہندوستان کے نامور بزرگ خواجہ حسن نظامی نے ۷۷ سال کی عمر میں انتقال کیا، ان کی جیسی جامع الحیثیات شخصیتیں مدتوں میں پیدا ہوتیں ہیں، وہ ایک خاندانی اور صاحبِ نسبت صوفی، صاحبِ طرز ادیب، ذہین و ماہر نفسیات داعی، کامیاب تاجر، غرض تنہا ایک دنیا اور دلّی کی تہذیب و شرافت کی یادگار تھے، انہوں نے اپنی محنت اور خداداد ذہانت و قابلیت اور سوجھ بوجھ سے نہایت معمولی حالت سے جس قدر ترقی اور شہرت و ناموری حاصل کی، اس کی مثالیں کم ملتی ہیں ان کا طرز انشاء نہایت سادہ مگر دلنشین اور سہل ممننع کی حیثیت رکھتا ہے۔ انہوں نے بہت چھوٹی چھوٹی اور حقیر چیزوں پر جیسے مفید، دلچسپ، سبق آموز اور نتیجہ خیز مضامین لکھے وہ ان ہی کا حصہ ہے، ان کے مضامین کے کئی مجموعے شائع ہوچکے ہیں، ان کی تصانیف کی تعداد سیکٹروں سے متجاوز ہے ، موضوع کا اتناتنوع اور نشیب و فراز مشکل ہی سے اردو کے کسی مصنف کے مضامین اور کتابوں میں مل سکتا ہے، ان کی تصانیف میں غدردہلی کے افسانوں کا سلسلہ شاہکار کی حیثیت رکھتا ہے، انہوں نے درجنوں اخبارات اور رسالے نکالے، ایک زمانہ میں ان کے زیرپرستی نکلنے والے رسالوں کی سارے ہندوستان میں دھوم تھی، ان کے بہت سے شاگرد اور تربیت یافتہ اڈیٹر اور صاحبِ قلم بن گئے،اس لیے اردو زبان کی خدمت کے اعتبار سے وہ اس دور کے اساطینِ اردو میں تھے۔
ان کے ہر کام میں جدت و ذہانت نمایاں تھی، اور ان کی کامیابی کا سب سے بڑا سبب ان کا یہی وصف تھا، ان کے مریدوں اور عقیدت مندوں کا دائرہ نہایت وسیع تھا، جس میں ہندو، مسلمان، سکھ اور امراء و والیانِ ریاست سب داخل تھے، ایک زمانہ میں انہوں نے...

External and Internal Factors of Political-Religious Violence and Pakistan’s Role: Unravel Threats for the Security of Modern Islamic State

Political scientists and Islamic philosophers have long been discussing the different phenomena of violence. This article analyzes external and internal factor of violence in Pakistan, interpreting the religious and political dimension of the violence. The presence of external and more specifically internal factors are the real threats for the security of the country. Building from theoretical approaches, I fielded two dimensions of the political-religious violence, violence inside the country and outside the country. It is found out, on the one hand, that the both dimensions can be met with the profound enforcement of the law. On the other hand, both dimensions of the violence can be the big contributory factors of violence due to the poor promulgation of the law. Unjust political-religious dispensation inside the country rise the frustration, and outside support make it fertile and leads it towards violence. It is proposed that on equity bases, political-religious deprivation and absolute deprivation of the minority elite class can be disposed of. I also come up with balanced educational system, which should be the blend of traditionalism and modernism for the fulfilment of our spiritual dimension and for the greater understanding of our political-religious outlook.

Quality Carrot Seed Production Through Management of Umbel Order by Application of Synthetic and Microbial Auxin in Combination With Potash

Quality seed is the reason for better harvest stand foundation and high creation. Daucus carota kernel excellence is influenced by inflorescence location and supplement accessibility. Other than a few different variables, umbel request, whenever oversaw and retained small, can deliver extraordinary return of worthy superiority kernel. For the most part, from essential and optional umbels seed is of great caliber. Though, kernels as of third order umbels is of low value. Concealment of third order umbels can move the supply of photosynthates to essential and auxiliary umbels, and can more progress their superiority. Auxins assume job in apics predominance and hence can be tried to stifle number of third umbel. A few auxins delivering bacterial strains (PGPBs) can likewise be assessed for concealment of tertiary umbels. Additionally, potash has been accounted for to improve seed quality however have not been tried in carrot seed generation. This examination was directed on cultivar T-29 to analyze the impacts of engineered and microbial auxin on change of umbel request in carrot seed generation. Impact of potash on seed yield and quality was likewise surveyed. The examination was directed at Vegetable Farm and Vegetable Seed Lab, Institute of Horticultural Sciences, University of Agriculture, Faisalabad. Three examinations were arranged. In first test, foliar splash of plant development controllers (Indole acidic corrosive and Naphthalene acidic corrosive) at various focuses (0, 100, 200 and 300 ppm) was done at various interims. Huge contrasts were seen among various convergences of plant development controllers for development, carrot seed yield and quality. All development related characteristics were improved by use of IAA or NAA at 200 and 300 ppm. IAA at 100 or NAA at 200 ppm altogether upgraded number of optional umbels by stifling the tertiary umbels. Yield of essential, optional and tertiary umbel seeds, 1000-mass seed of essential, auxiliary and third order umbel and seed quality properties, i.e., germination, force list, germination list, enzymatic action for example Superoxide dismutase, Peroxidase, Catalase, all out cancer prevention agents and complete phenolic substance were expanded by use of IAA or NAA at 200 ppm. IAA or NAA at 200 ppm was discovered the best to limit the conductivity of seed leachates and malondialdehyde substance in seedlings raised from seeds of essential, auxiliary and tertiary umbels. It was presumed that foliar utilization of IAA or NAA at 200 ppm can be utilized to successfully alter umbel request and thus to build seed quality. Second analysis was directed to investigate the capability of different bacterial strains (PsJN, FD17, FF34 and KS54) in modification of inflorescence request for superiority of seed carrot generation. Critical contrasts were seen for estimated development records, yield and seed quality properties among plant development advancing bacteriological straining connected alone and with L-TRP. It was seen that FD17+L-TRP and FF34+L-TRP viably limited the quantity of tertiary umbels. PsJN+L-TRP played out the best for seed yield, 1000-seed weight, germination rate, power list, germination file, action of Turf, Case and Feline, greatest complete phenolic substance, and all out cell reinforcements of seeds from essential, optional and tertiary umbel request. Electrical conductivity of seed leachates and malondialdehyde substance in seedlings raised from seeds of essential, auxiliary and tertiary umbels were diminished by PsJN +L-TRP. Besides, carrot seed yield and quality can likewise be upgraded by adjusting the umbel request through foliar use of bacterial strains alone or with L-TRP. Third test was directed to assess the best portion of potash, utilizing seven intensities (0, 20, 40, 60, 80, 100 and 120kilogram per ha), for high return and nature of carrot seed. All development, seed yield and quality related characteristics were improved by potash application up to 80 or 100 kilogram per ha sulfate of potassh (SOP), however further increment in potash did not result in critical upgrade of different properties. Carrot seed makers may utilize chose PGPB (PsJN, FF34, FD17) or PGRs (IAA or NAA at 200 ppm), according to accessibility, to smother tertiary umbels and increment seed yield and quality, in blend with potash (at 80 or 100 kilogram per ha).