International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 04 | Apr 2024
p-ISSN: 2395-0072
www.irjet.net
DESIGN OF CIRCULAR VOLUMETRIC ANTENNA USING SIW TECHNOLOGY FOR WIRELESS APPLICATIONS Supriya K1, Durga Lalitha K2, Phanindra M3, Pavan G4, Sasidhar A5, Ramprasad Ravula6 12345Graduate Student,6Senior Assistant Professor Department of Electronics and Communication
Engineering, Sri Vasavi Engineering College, Tadepalligudem, West Godavari, Andhra Pradesh, India.
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Abstract –Single band circular volumetric antenna using
platform for integrating all the components of a microwave circuit inside a single substrate, with a rectangular cross-section. Using a single substrate guarantees a limited volume and simplicity of manufacture, while the rectangular cross-section of the line provides the advantages of the waveguide topology in terms of losses [4]. One attraction to SIW is that the amount of metal that carries the signal is far greater than it would be in micro strip [5].
Substrate Integrated Waveguide (SIW) technology is introduced. The volumetric antenna is made ofFR4 (Flame Retardant) substrate material and antenna’s circular patch has a radius of 4 mm. By placing a rectangular slot on the circular patch with 8 mm length and 0.4 mm width, the HFFS antenna simulation tool analyses the reported antenna properties and harvesting the results such as gain of 3 dB, directivity of 4.21 , VSWR of 1.31 and return loss of 17.22 dB at frequency of 10.75 GHz. The proposed circular volumetric SIW antenna structures come up with a bandwidth of 210MHz. It is widely used in radar systems, remote sensing and microwave imaging applications.
2. SUBSTRATE INTEGRATED WAVEGUIDE Using two rows of conducting cylinders and slots implanted in a dielectric substrate to connect two parallel metal plates, SIWs are constructed to resemble integrated waveguides (Fig – 1).
Keywords: Radio Frequency, SIW Technology, Volumetric antenna, Wireless Communication Systems.
1. INTRODUCTION Antennas are crucial components of wireless communication networks. An antenna is, by definition, a device that converts an electromagnetic wave in free space from an RF signal that is traveling on a conductor [1]. Lowprofile antennas are necessary in high-performance aircraft, spacecraft, satellite, and missile applications where aerodynamic profile, size, weight, cost, performance, and ease of installation are constraints. Similar standards are currently found in a wide range of other commercial and government applications, including wireless communications and mobile radio. It is possible to use micro strip antennas to satisfy these needs [2]. Micro strip components require strict fabrication concessions when implementing RF, microwave and millimeter-wave components, yet they work quite well for low frequency applications. At higher frequencies, however, they become ineffective. This is because at higher frequencies, wavelengths are shorter. Conversely, waveguide devices are perfect for higher frequency systems, but they are very expensive, difficult to make and difficult to combine with nearby planar components. The design of effective circuits and parts that operate in the radio frequency (RF) and microwave frequency spectrum now has more options thanks to this technology. SIW bridges the gap between planar transmission line technologies, such as the micro strip, and traditional airfilled rectangular waveguide [3]. The authors presented a
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Fig -1: Structure of SIW Antenna wef f
- Effective width
w
- Width of the cavity
L
- Length of the cavity
d
- Diameter of the metal vias
s or p
- Spacing between metal vias
t or h
- Thickness
With the use of a slot antenna, multi-frequency antennas can be created with a low profile, flawless isolation, and easy integration into other planar circuits. The spacing between the vias and the diameter are the key components in the design process also there is some technological gap between them.
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