Design of Self-Similarity Multi-Fractal Antenna for WiMAX Application

Prabhu, P.; Elamaran, E.; Desai, S. Lenin

doi:10.17485/ijst/2016/v9i15/89603

Cited by 4 publications

(1 citation statement)

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“…The antenna can adapt to a wide range of environments and applications. Fractal features, such as self-similarity [1], self-affinity [2], and space-filling [3], combined with electrical reconfigurability to dynamically modify multiple antenna parameters, have made FRAs very appealing for multifunctional antenna designs. The majority of FRAs use traditional microstrip patch antennas, which incorporate fractal geometries and reconfigurability as part of the antenna design process.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a PDLC-Based Reconfigurable Hilbert Fractal Antenna for Large and Fine THz Frequency Tuning

Garu

Wang

2022

Micromachines

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The proposed reconfigurable radiating antenna design is based on the integration of a reconfigurable fractal antenna and electro-optic substrate material. This antenna can be adjusted to achieve either re-configurability or tunability in the desired frequency range for wireless systems. The electromagnetic characteristics of the fractal antenna are manipulated at both the level of fractal geometry, electrical length and dielectric substrate. The designed antenna features multiband responses, in which the geometry and length change create a large frequency shift and the dielectric change using polymer dispersed liquid crystal (PDLC) creates fine and/or continuous tuning. The far field and scattering properties of the antenna are analyzed using the Computer Simulation Technology (CST) Microwave Studio Suite. The proposed approach has successfully demonstrated reconfigurable switching for up to four frequency bands between 0.2 and 0.6 THz. The dielectric constant change in the PDLC substrate shows fine and continuous frequency tuning with an 8% maximum frequency shift when operating around 0.54 THz and a high directivity of 7.35 dBi at 0.54 THz and 8.43 dBi at 0.504 THz. The antenna can also realize a peak gain of 4.29 dBi at 0.504 THz in the extraordinary polarization state of PDLC. The designed antenna can be readily integrated in the current communication devices, such as satellites, smart phones, laptops, and other portable electronic devices, due to its compact geometry and IC compatible design. In satellite applications, the proposed antenna can play a significant role in terms of security. The antenna could be extremely useful for satellites that want to keep their information secret; by constantly switching their operating frequency, spy satellites can evade detection and data collection from enemy ears.

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Section: Introductionmentioning

confidence: 99%