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DESIGNING MICROSTRIP PATCH ANTENNA BY USING HFSS
Funda KEKEÇ

Danışman: Yrd. Doç. Dr. Cengiz ÖZZAİM

Elektrik-Elektronik Mühendisliği

Mühendislik-Mimarlık Fakültesi, Anadolu Üniversitesi

İki Eylül Kampusu, 26555, Eskişehir

1. 
   MIcrostrIp patch antenna
   

An antenna is an element used for radiating or receiving electromagnetic wave. Although antennas may seem to be available in numerous different shapes and sizes, they all operate according to the same basic principles of electromagnetics. As a general principle, a guided wave traveling along a transmission line which opens out will radiate as a free-space wave, also known as an electromagnetic wave.

A microstrip patch antenna is a type of antenna that offers a low profile, i.e. thin, and easy manufacturability, which provides a great advantage over traditional antennas. Patch antennas are planar antennas used in wireless links and other microwave applications. The microstrip technique is a planar technique used to produce lines conveying signals and antennas coupling such lines and radiated waves. It uses conductive strips and/or patches formed on the top surface of a thin dielectric substrate separating them from a conductive layer on the bottom surface of the substrate and constituting a ground for the line or antenna. A patch is typically wider than a strip and its shape and dimensions are important features of the antenna. Planar antennas are generally grouped into microstrip-line antennas and slot-line antennas. Microstrip patch antennas are attractive due to their compact structure, light weight due to the absence of heavy metal stamped or machined parts, and low manufacturing cost using printed circuit technology. They also provide low profiles, conformity to surfaces and direct integration with microwave circuitry. Consequently, microstrip patch antennas are used widely in antenna arrays. For example, reflector or dish antennas are commonly used in residential environments for receiving broadcast services, such as the transmission of television channel signals, from geostationary, or equatorial, satellites. and are more compatible than reflector application of one of several methods.

2. HFSS

HFSS is a commercial finite element method solver for electromagnetic structures from Ansoft Corporation. The acronym originally stood for high frequency structural simulator. It is one of the most popular and powerful applications used for antenna design, and the design of complex RF electronic circuit elements including filters, transmission lines, and packaging. It was originally developed by Professor Zoltan Cendes, his brother Nicholas Csendes, and his students at Carnegie Mellon University. Prof. Cendes founded Ansoft and sold HFSS stand-alone under a 1989 marketing relationship with Hewlett-Packard, and bundled into Ansoft products. After various business relationships over the period 1996-2006, H-P (which became Agilent EEsof EDA division) and Ansoft went their separate ways: Agilent with the critically acclaimed EMDS and Ansoft with their HFSS products, respectively.

PROJE FUARI 2009

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