Design of Microstrip Antenna with Improved Bandwidth for Biomedical Application
In this paper, a single element microstrip antenna will be designed at 6 GHz in rectangular shape for biomedical application to detect breast cancer tissues. The antenna will be designed in HFSS-Ansoft version 13 and simulated and analyzed in terms of ret
- PDF / 833,665 Bytes
- 15 Pages / 439.37 x 666.142 pts Page_size
- 69 Downloads / 223 Views
Abstract In this paper, a single element microstrip antenna will be designed at 6 GHz in rectangular shape for biomedical application to detect breast cancer tissues. The antenna will be designed in HFSS-Ansoft version 13 and simulated and analyzed in terms of return loss and gain. This work further extended to enhance bandwidth applying some techniques like air-gap, capacitive feed, and slot on patch with different structures. Keywords Rectangular patch
⋅
Air-gap
⋅
Capacitive feed
⋅
Slot on patch
1 Introduction The opt antenna for biomedical application for detecting breast cancer tissues [1, 2] at microwave range is a microstrip antenna which is also called as patch antenna [3–5]. Microstrip patch antenna consists of a patch of metal which acts as radiating element on top of the grounded dielectric substrate of thickness h in mm, with relative permittivity and permeability εr and μr = 1 respectively as shown in Fig. 1. The metallic patch may be of various shapes with rectangular, circular, and triangular, hexagon, etc. Generally microstrip antennas are excited with different feed techniques like coaxial feed, inset feed, coplanar feed, aperture coupling, etc. The simplest feed technique is a coaxial feed at 50 Ω. The schematic diagram is shown in Fig. 2a. One of the limitations of single layer antenna is low bandwidth. To enhance the K. RamaDevi (✉) ⋅ A.M. Prasad JNTU College of Engineering, Kakinada, Andhra Pradesh, India e-mail: [email protected] A.M. Prasad e-mail: [email protected] A.J. Rani V.R. Siddhartha Engineering College, Vijayawada, Andhra Pradesh, India e-mail: [email protected] © Springer Science+Business Media Singapore 2017 S.C. Satapathy et al. (eds.), Proceedings of the International Conference on Data Engineering and Communication Technology, Advances in Intelligent Systems and Computing 468, DOI 10.1007/978-981-10-1675-2_22
201
202
K. RamaDevi et al.
Fig. 1 Rectangular patch microstrip antenna
Fig. 2 a Schematic diagram of coaxial feed microstrip antenna. b Schematic diagram of capacitive feed microstrip antenna
(a)
Patch
Substrate
h Ground Coaxial Feed
(b)
Feed Patch
Patch Substrate h Air-gap Coaxial Feed
Ground
bandwidth, coaxial feed is connected to small patch (capacitive feed) through air-gap and substrate shown in Fig. 2b. The performance of an antenna depends on the shape of the radiator and generally measured in terms of return loss S11 in dB, radiation pattern, gain, directivity, frequency bandwidth from return loss of below 10 dB, impedance, etc. Capacitive-feed technique [2] and their response are observed and further extended with air-gap microstrip antenna for breast cancer detection applications with improved band width and gain [6]. Pentagon-shaped radiator for wireless communications that makes a slot to the patch was observed [7–9] for high gain and improvement in impedance bandwidth. Before designing, the practical antenna can be simulated using software like ANASOFT-HFSSTM [10]. By simulation, antenna characteristics can be analyzed and s
Data Loading...
