design of dual band u-slot microstrip patch antenna...
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DESIGN OF DUAL BAND U-SLOT MICROSTRIP PATCH ANTENNA FOR
WORLDWIDE DJTEROPERABILITY FOR MICROWAVE ACCESS (WIMAX)
ABDULWALI ABDULRAHMAN SHEIKH OSMAN
This thesis is submitted in fi~lfillment of the requirements for the award of Degree of
Master of Engineering in Electrical and Electronic Engineering
(Telecommunication) with honours
Faculty of Electrical and Electronic Engineering,
Universiti Tun Hussein Onn Malaysia
January 20 1 5
ABSTRACT
Recent advancement in WiMAX and similar applications need the antennas
of broad bandwidth, small size, high gain, and enhanced efficiency. Microstrip patch
antennas are widely used in these applications due to advantageous features like
compactness, light weight and high efficiency. However, one of the major limitations
of the microstrip patch is the narrow bandwidth. The objective of this project is to
design, construct and fabricate a rectangular U-slot antenna for WiMAX applications
to operates at frequency range of 2.8-4.8GHz, to achieve a dual band of WiMAX
frequency. This antenna is fed by a microstrip feeding line. The antenna was
fabricated on FR4 substrate, that has a relative dielectric constant, .sr = 4.3, a loss
tangent tan 6 = 0.001 and thickness, h of 1.6 mm. Transmission feed Iine is used due
its better impedance matching capabilities than the inset feed technique. The
characterestic of each parameter of the antenna was analysed by using CST
simulation. This analysis is important to determine the effect of the each antenna
parameter to the output of the antenna. Insertion loss and return loss are two
important responses to be observed. The fabricated antenna is tested using network
analyzer.
ABSTRAK
Kemajuan terkini dalam WiMAX dan aplikasi yang serupa memerlukan
antena lebar jalur yang luas, saiz kecil, keuntungan yang tinggi, dan kecekapan yang
dipertingkatkan. Antena tampal mikrojalur digunakan secara meluas dalam aplikasi
ini kerana ciri-ciri berfaedah seperti padat, ringan dan kecekapan yang tinggi. Walau
bagaimanapun, salah satu batasan utama adalah lebar jalur yang sempit. Objektif
projek ini adalah untuk merekabentuk, membina dan membikin antena U-slot
segiempat untuk aplikasi WiMAX untuk beroperasi pada julat frekuensi 2.8-4.8GHz,
bagi mencapai jalur dwi-frekuensi WiMAX. Antena ini diberi suapan oleh garis
suapan mikrojalur. Antena telah dibikin pada FR4 substratum, yang mempunyai
pemalar dwi-elektrik relatif, .zr = 4.3, kerugian tangen tan 6 = 0.001 dan ketebalan, h
1.6 mm. Penghantaran suapan garis lurus digunakan kerana keupayaan galangan
pemadanan yang lebih baik daripada yang teknik suapan sisipan. Setiap ciri
parameter antena dianalisis dengan menggunakan simulasi CST. Analisis ini adalah
penting untuk menentukan kesan parameter setiap antena untuk keluaran antena.
Kehilangan sisipan dan kerugian pulangan dua adalah penting yang perlu dipatuhi.
Antena fabrikasi diuji dengan rangkaian analyzer.
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