Search or add a thesis

Advanced Search (Beta)
Home > Bandwith Enhancement of Patch Antenna Through Various Methods for Satellite Communication

Bandwith Enhancement of Patch Antenna Through Various Methods for Satellite Communication

Thesis Info

Access Option

External Link

Author

Engr. Gulzar Ahmad

Program

PhD

Institute

University of Engineering and Technology

City

Peshawar

Province

KPK

Country

Pakistan

Thesis Completing Year

2018

Thesis Completion Status

Completed

Subject

Communication Studies

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/10075/1/Gulzar%20Ahmad_Communication%20Stream_2018_UET%20Psw_PRR.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676724531020

Asian Research Index Whatsapp Chanel
Asian Research Index Whatsapp Chanel

Join our Whatsapp Channel to get regular updates.

Similar


The microstrip patch antennas have made a great progress in the last few decades as they have enormous advantages as compared to traditional antennas. These antennas have attractive features like the low profile, small dimensions, low volume, very light weight, economical, conformable to the planer and non-planer surfaces and easy to fabricate. They occupy a very small volume during installation. They are manufactured very inexpensively and easily using modern printed circuit technology. However, a few major limitations of these microstrip patch antennas (MSPA) include low gain, very low impedance bandwidth and low efficiency. The future patch antennas for 5G and satellite applications need to have a wide band, large gain and high efficiency due to the increased use of internet streaming. A novel MSPA, that includes the effect of parasitic patches, radiated fractal patch structure with the influence of defected ground structure (DGS) and air cavities in the material of the substrate for achieving both wide impedance bandwidth and high efficiency, is proposed in this research. The radiated patch element is excited by a coaxial feeding line. The antenna is designed on Preperm L450 (lossy) substrate material with permittivity 4.5 and with loss tangent 0.0005. It is observed that the proposed design of 18.6 × 10.4mm2 structure achieves a very encouraging performance of wide bandwidth, high gain, stable radiation and high efficiency in the given operating range of electromagnetic spectrum. The return loss of 44.81dB has been achieved at the centre frequency of 13.16GHz by the proposed broadband MSPA.???? equals to 1.01 has been obtained at the centre frequency. The maximum radiation efficiency of 100% at the frequency of 13.35-14.11GHz and maximum total efficiency of 97.18% at the frequency of 13.5GHz has been achieved. The maximum gain of 7.03dBi has occurred at the frequency of 27GHz. The proposed design has obtained wide fractional bandwidth of 132.44%. This wide bandwidth of 17.43GHZ ranges from 12.7 to 30.13GHz. The values of VSWR are less than 2 in the entire operating band. These qualities of high gain, wider bandwidth and higher efficiency make the proposed novel antenna an excellent candidate to work in the ??, ? and ??-bands.
Loading...
Loading...

Similar Books

Loading...

Similar Chapters

Loading...

Similar News

Loading...

Similar Articles

Loading...

Similar Article Headings

Loading...

راحتِؐ کون ومکاں سے ہر خوشی کی آبرو

راحتِ کون و مکاںؐ سے ہر خوشی کی آبرو
َ’’زندگی نے اُنؐ سے پائی زندگی کی آبرو‘‘

تاجدارِ دو جہاںؐ کے’’ فَقْرُ فَخْرِیْ‘‘ کے طفیل
ہے جہانِ رنگ و بُو میں سادگی کی آبرو

اتّباع رہبرِ جنّ و بشرؐ کے فیض سے
سوئے کعبہ ہر جبینِ بندگی کی آبرو

ہے شفیعِ المذنبیںؐ سے سارے عاصی آس مند
رب ھبلی کی دعا سے اُمّتی کی آبرو

ابنِ آدم کو عطا کی مسندِ انسانیت
فخرِ آدمؐ ہی کے دم سے آدمی کی آبرو

طائرِ حسنِ تخیل کی بھلا پرواز کیا
مدحتِ ممدوحِ رب سے شاعری کی آبرو

حبِّ محبوبِ خداؐ عرفانؔ کے دل کی طلب
آرزوئے دل یہی ہے دلبری کی آبرو

The Notions of Obtainable Politics in the Light of Quran

It is generally believed that the contemporary world of academia is divided between Divine and non-Divine philosophies. By considering the Divine theory in accordance to the human behavior, advocates of theory take it in the best interest of mankind. They argued that the Creator Himself guides the human being in right direction. Islam unlike modern concept of governance does not separate religion from politics and fulfills its legislative needs by means of Divine Law or Shariah. In Islamic system, the state through Caliph will have to establish Shariah of God by working on the restrictions set by Him and in conformity with His orders and commands. Yet he is allowed only to give lawful command and the people are also bound to follow only the lawful commands. In Islam there is no place for such a political order where a solitary individual or a group of persons have authoritarian or dictatorial rule. However, the Muslims, in all circumstances, must cling to the state authorities and are obliged to submit to the ultimate source of law given by the Almighty Allah in the Quran. Non-Divine theories, on the other hand mainly stress upon rationalization of human development and behavior in a certain direction. Leaving those theories aside, current study will focus on the political philosophy of Islam as prescribed by the teachings of Quran and Sunnah. The subject matter of the study is to see the possibilities regarding implementation of Islamic values in the contemporary state and society.

A Novel Hybrid Model by Integrating Scrum, Xp and Rup

Scrum and Extreme Programming (XP) are frequently used models among all models of agile. Where as Rational Unified Process (RUP) is a conventional plan driven software development model. The agile and plan driven approaches both have their own strengths and weaknesses. A good feature of RUP model is that RUP works well for medium and large scale projects. Although RUP model has certain drawbacks, such as tendency to be over budgeted, slow in adaptation to rapidly changing requirements and reputation of being impractical for small and fast paced projects. Agile models being alternative to conventional models are not appropriate for large scale projects with significant light documentation. Strengths of Scrum and XP are that they are self managed processes through iterative planning. RUP is slow in adaptation to rapidly changing requirements due to well established requirement documentation. This feature is not lacking in Scrum and XP models as they respond well to creeping requirements. Advantage of RUP model is that it focuses on satisfying business and customer needs by delivering quality software and gives comprehensive planning for the system. Major drawback of RUP model is that it fails to provide clear implementation guidelines and leaves the tailoring to the user entirely. XP and scrum are self managed techniques through iterative planning. XP model has certain drawbacks such as weak documentation and poor performance for medium and large development projects. XP has a concrete set of engineering practices that emphasizes on team work where managers, customers and developers are all equal partners in collaborative team. Scrum is more concerned with the project management. It has seven practices namely Scrum Master, Scrum teams, Product Backlog, Sprint, Sprint Planning Meeting, Daily Scrum Meeting and Sprint Review. Keeping above mentioned context in view, this thesis successfully proposed a SPRUP model by combining strengths of Scrum, XP and RUP as well as narrower the weaknesses to produce quality software. Proposed SPRUP model was validated through a controlled case study. The results of this case study were then compared with the results of three of the case studies of Scrum, XP and RUP