International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 06 | Jun 2023
p-ISSN: 2395-0072
www.irjet.net
PERFORMANCE EVALUATION AND ANALYSIS OF FREQUENCY RECONFIGURABLE DIELECTRIC RESONATOR ANTENNA KM NEHA VERMA1, Dr. RISHI ASTHANA2 1M.Tech, Electronic and Communication Engineering, GITM, Lucknow, India 2Professor, Department of Electrical Engineering, GITM, Lucknow, India
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Abstract - In this line of investigation, the initial step is to
other types of antennas, particularly in terms of their radiation pattern and return loss. They are used in a variety of applications, including wireless communication, radar systems, and satellite communication systems.
develop a basic dielectric resonator antenna that has microstrip strips attached to two of the edges of the dielectric resonator. The value of rr = 10 is used to represent the dielectric constant of the DR, which has dimensions of 13 mm 13 mm 10 mm. The DR is positioned on a ground plane with dimensions of 100 millimetres by 150 millimetres and a substrate with a rr value of 3.38. There are six distinct working conditions that may be accomplished by placing shorting tabs along one edge of the DRA. Second, a frequency reconfigurable DRA in the form of a H that uses coplanar waveguide (CPW) feed is given here. This antenna is made up of two different types of dielectric resonators, each of which has a dielectric constant of 15. On a substrate with a dielectric constant of 3.2, the DRs are positioned. In order to activate the DRA, the CPW feeding approach is used. On the line that connects the dielectric resonators, there are two PIN diodes installed for usage. By using these PIN diodes, it is possible to acquire three different working modes, such as off on, off on, and on on. In the OFF ON state, two bands are obtained, one with a centre frequency of 2.7 GHz for the WLAN application and the other with a centre frequency of 4.8 GHz for the INSAT (Indian national satellite system) use. When the switch is in the ONOFF position, a single narrow band with a centre frequency of 3.7 GHz is produced for use in wireless local area network (WLAN) and international mobile telecommunications (IMT) applications. In a manner analogous, when the ON ON state is selected, a dual band consisting of the frequencies 2.6917 and 5.2589 is produced for use in WLAN applications.
Figure-1: Reconfigurable dielectric resonator antennas The principle of reconfigurable dielectric resonator antennas (RDRAs) is based on the ability of dielectric materials to affect the resonant frequency of the antenna. When a high dielectric constant material is placed near a conductive structure, it creates a resonant structure with a specific resonant frequency. By changing the dielectric constant of the material, the resonant frequency of the structure can be adjusted.
Key Words: reconfigurable dielectric resonator antennas, frequency analysis, dielectric constant, Finite Element Method, substrate material, resonance frequency, microstrip patch antenna, rectangular dielectric resonator antenna, return loss, radiation pattern.
1. INTRODUCTION
RDRAs consist of a dielectric resonator and a conducting element, such as a microstrip patch or a slot. The dielectric resonator is a piece of high dielectric constant material that is excited by the conducting element. By changing the dielectric constant of the resonator, the resonant frequency of the antenna can be tuned.
Reconfigurable dielectric resonator antennas (RDRAs) are a type of antenna that can be tuned to different frequencies by adjusting their physical properties. RDRAs are composed of a dielectric resonator, which is a piece of material with a high dielectric constant, and a conducting element, such as a microstrip patch, that is used to excite the resonator. By changing the dielectric constant of the resonator, the resonant frequency of the antenna can be adjusted. RDRAs have been shown to have superior performance compared to
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There are several methods for changing the dielectric constant of the resonator in RDRAs, including the use of varactor diodes or micro-electromechanical systems (MEMS)
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