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Abstract
In this paper, a novel single-feed dual-band circularly polarized half E-shaped microstrip patch antenna (HESMSA) array is proposed and experimentally studied. It consists of a 4 × 4 array realized on RT duroid substrate of height 3.2 mm. Each HESMSA element of the array is fed by a corporate feed network designed on RT duroid substrate of 0.8 mm thickness. The array antenna notifies a measured impedance bandwidth of 11.9% (6.4–7.2 GHz), impedance and axial ratio overlap bandwidth of 8.2% (6.65–7.2 GHz) and peak boresight gain of 17.84 dBic at the lower operating frequency of 6.7 GHz. It exhibits measured impedance bandwidth of 9.3% (7.7–8.45 GHz), impedance and axial ratio overlap bandwidth of 6.1% (7.7–8.19 GHz) and a peak boresight gain of 18.42 dBic at a higher operating frequency of 8 GHz. The results of the array antenna demonstrate the desired performance for C-band satellite communication applications.
Acknowledgement
The authors thank Dr Ch. Viswanadham, Bharat Electronics Limited, Hyderabad for the help provided in testing the proposed antenna in anechoic chamber for experimental results.
Additional information
Notes on contributors
A. Bharathi
A Bharathi was born in Telangana, India in 1978. She completed BTech degree in electronics & communication engg. (ECE) from Jawaharlal Nehru Technological University Hyderabad (JNTUH) in 2001 and ME in microwave and radar engineering from University College of Engineering (UCE), Osmania University (OU), Hyderabad, Telangana, India in 2004. She received PhD degree from Dept of ECE, JNTUH, Hyderabad. She is presently working as an assistant professor in ECE Dept., UCE, OU, Hyderabad, India. She has 15 years of teaching experience. Her research interests include antenna theory, microwave and RF circuits. She is a Senior Member of IEEE, and Member of IETE.
G. Ravi Shankar Reddy
G Ravi Shankar Reddy was born in Andhra Pradesh, India in 1978; he completed BTech in ECE from JNTUH in 2001 and ME in systems and signal processing from UCE, OU, Hyderabad, Telangana, India in 2004. He completed his PhD in Dept of ECE, JNTUA, Anantapur. He is presently working as a professor in ECE Dept, CVR College of Engineering, Hyderabad, India. He has 15 years of teaching experience. His research interests include signal processing for antenna theory. Email: [email protected]