Frequency Agile Annular Ring Microstrip Antenna Loaded with MOS Capacitor

Authors: Kanaujia, B.K.¹; Singh, A.K.²; Vishvakarma, B.R.³

Source: Journal of Electromagnetic Waves and Applications, Volume 22, Number 10, 2008 , pp. 1361-1370(10)

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Abstract:

A new techniques for designing the frequency agile annular ring microstrip antenna (ARMSA) is presented. The frequency agility is achieved by loading the MOS capacitor on annular ring microstrip antenna. Instead of controlling the resonance frequency by changing the radii of annular ring microstrip antenna, it is also possible by means of changing the gate bias voltage of MOS capacitor without altering the radii of annular ring microstrip antenna. The investigations based on cavity model are carried out for the various thickness of oxide (Si₃N₄) layer from 100 Å to 400 Å. It is found that the maximum frequency agility 51.56% (1.65 GHz) is obtained for 100 Å and minimum frequency agility 30.31% (0.97 GHz) is obtained for 400 Å.

Document Type: Research article

DOI: http://dx.doi.org/10.1163/156939308786348910

Affiliations: 1: Department of Electronics and Communication Engineering, Faculty of Engineering and Technology, M. J. P. Rohilkhand University, Bareilly 243006, India 2: Department of Electronics and Instrumentation and Engineering, Faculty of Engineering and Technology, M. J. P. Rohilkhand University, Bareilly 243006, India 3: Department of Electronics Engineering, Institute of Technology, B. H. U., Varanasi, 221005, India

Publication date: 2008-10-01