Universiti Teknologi Malaysia Institutional Repository

The gain effects of air gap quadratic aperture-coupled microstrip antenna array

Kamarudin, Muhammad Ramlee and Jamlos, M. F. and Rahman, T. A. and Ali, M. T. and Md. Tan, M. N. and Saad, P. (2010) The gain effects of air gap quadratic aperture-coupled microstrip antenna array. In: 28th Progress in Electromagnetics Research Symposium (PIERS 2010), 5 - 8 July 2010, Cambridge, Massachusetts dan Pennsylvania State University, USA.

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Abstract

This paper describes the concept of air gap structure to enhance the antenna’s gain. The structure of the planar antenna array consisting rectangular16 elements is comprised based on corporate feed network. The advanced of this antenna design is the antenna’s feeding network is etched on a di?erent layer from the elements by certain of air gap distances. The air gap antenna was separated and measured from 0 mm to 20 mm, in 0.5 mm increments respectively. Quadratic slots enabled most of the induced current and power from source to the radiating patches. The magnetic characteristics of quadratic allowed absorbing the re?ected electrical ?elds around the slots. The con?guration of air gap is competent in?uencing a stronger fringing ?eld at the edge of the patches. The fringing ?elds become stronger as the distance is getting increased. A strong fringing ?elds leads for the patches to radiate even further. The air gap increased the radiated power and reduced conductor loss. The gap coupling is more feasible to reduce surface wave excitation between elements which are separated by a ground plane. The combination of air gap structure with quadratic slots the gain grooming 400% times larger than a quadratic aperture coupled microstrip array antenna without an air gap. The proposed antenna also has signi?cant 50% of gain compared to the conventional transmission line antenna array. The air gap has successfully increased the level of isolation up to 1.5 times bigger than without air gap. The e?ects of the gap on parameters such as radiation patterns and gain are observed. Good agreement between simulations and measurements is also obtained. These results extend the validity of the analysis and will be useful for higher gain applications.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:antenna’s feeding network, corporate feed network
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:24357
Deposited By: Liza Porijo
Deposited On:26 Sep 2012 02:17
Last Modified:26 Sep 2012 02:21

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