Multiband miniaturisefrequency reconfigurable patch antenna using PIN diodes

Kumar, Rupesh; Vanitha, M.; Prabu, R. Thandaiah; Bindhu, M.

doi:10.1007/s11276-022-02946-6

Cited by 29 publications

(3 citation statements)

References 31 publications

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“…As shown in step II of figure 1, given the initial crosssectional radius (R A ) of the first stable configuration (configuration A) and anti-symmetric layup angle θ, the cross-sectional radius (R B ) of the second stable configuration (configuration B) can be derived from equation (5), which is based on the principle of minimum potential energy.…”

Section: 2mentioning

confidence: 99%

“…Nowadays, various methods are used to artificially modify the structure and the physical field distribution of the antenna to achieve pattern reconfiguration [4], such as electrical techniques, mechanical techniques, novel materials, etc. Electrical techniques integrate electrical switches such as PIN diodes [5,6], varactors [7,8], and micro-electro-mechanical system [9,10] into the antenna structure to redistribute its surface current. While these techniques provide good isolation and quick response, they are susceptible to the nonlinear effects of the switches.…”

Section: Introductionmentioning

confidence: 99%

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Pattern reconfigurable antenna with specified main lobe deflection and stable bandwidth by using bistable composite laminates

Zhang,

Tong,

et al. 2024

Smart Mater. Struct.

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Pattern reconfiguration of antennas has become a very important measure to improve the signal gain and working bandwidth by manipulating beam direction. Developing rational methods to find the reconfigurable structure is a key problem. In this paper, a collaborative optimization method is proposed to comprehensively consider both the geometric parameters of the bistable substrate and the size of the radiation patch. This method enables the design of a pattern reconfigurable antenna with specified main lobe deflection and stable bandwidth. Specifically, by using a two-step process, the log-periodic dipole antenna (LPDA) is conformally mapped from the planar substrate to the bistable substrate. Further investigation reveals that the main lobe deflection angle and bandwidth stability are influenced by the geometric parameters of the bistable substrate and the size of radiation dipoles, respectively. Thus, these parameters are selected as design variables for solving the proposed collaborative optimization model. The transformation between two stable configurations enables the proposed LPDA to deflect the main lobe of the H-plane pattern by 30° while maintaining consistency in the E-plane patterns. Importantly, the resonant frequencies remain unaffected and the bandwidth does not decrease during the pattern reconfiguration. Notably, the pattern reconfigurable mechanism is rooted in that the transformation between the two stable configurations alters the number and position of the dipoles in the radiation region and their current path, thereby changing the radiation direction of electromagnetic waves. The proposed collaborative optimization method has a potential application for other types of antennas and offers opportunities for various applications in the field of wireless communication.

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Section: 2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pattern reconfigurable antenna with specified main lobe deflection and stable bandwidth by using bistable composite laminates

Zhang,

Tong,

et al. 2024

Smart Mater. Struct.

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show abstract

“…For example, the design in [9] used a shape memory alloy bimorph-actuated switch for antenna reconfiguration. Or some researchers achieve a reconfigurable antenna with special materials, like using the PIN diodes by FR-4 based low profile material [10]. A single PIN diode can also achieve frequency reconfigurability [11].…”

Section: Introductionmentioning

confidence: 99%

A Dual-Polarized, Direction Diagram Reconfigurable, Liquid Metal Antenna

Bai¹,

Lv²,

Zhu³

2022

PIER Letters

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In this paper, we present a dual-polarized, pattern reconfigurable, liquid metal dipole antenna. The proposed design consists of a pair of ±45 • polarized reconfigurable dipole antennas, two vertically placed feeding structures with filtering branches, and a resin frame for injecting liquid metal to adjust the pattern. By introducing a U-shaped structure, a better impedance matching performance is achieved in two bands. The polarization can be switched by injecting liquid metal into different dipole microfluidic channels. By controlling the liquid metal reflector around the magnetic dipole, the reconfigurable pattern of +45 • polarized antenna can be realized at 0 • , 180 • and 90 • on the plane of phi = 90 • , and the reconfigurable pattern of −45 • magnetic dipole antenna can be achieved at 0 • , 90 • and 270 • on the plane of phi = 0 • . The basic antenna operates with linear polarization around 4.8 GHz. The VSWR is less than 1.5. In the radiation pattern of the antenna, the port isolations of the two crossing ports are S 12 and S 21 . S 21 port isolation is more than 35 dB. The antenna has good pattern reconfigurable characteristics, and the simulation results of the antenna indicate good radiation directivity. Moreover, the height of the proposed antenna is 0.0625λ at 4.8 GHz. The good performance of the antenna makes it a candidate for base station systems below 5G sub-6 GHz.

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Design of a Compound Reconfigurable Terahertz Antenna Based on Graphene

Jin,

Rong,

et al. 2023

Plasmonics

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In this paper, a terahertz dipole antenna with compound recon gurability is designed, which possesses the capability of controlling frequency, radiation pattern, and polarization state. A capacitive load loop (CLL) made of graphene-metal composite material is applied around a pair of mutually orthogonal graphene-based dipole antennas. By controlling the bias voltage, the surface conductivity of graphene is adjusted, enabling compound recon gurability. The graphene strips on the CLL provide a high degree of freedom for the radiation characteristics of the antenna. By adjusting the combination of chemical potentials of graphene, the operating frequency of the antenna can be recon gured within the range of 1.40 THz to 1.84 THz. Moreover, it is possible to control the antenna to achieve directional radiation with four beams (0°, 90°, 180°, 270°) in the XOY plane at 1.75 THz, and ranging from 1.68 THz to 1.81 THz, it can be recon gured to achieve controllable RHCL or LHCL.

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Multiband miniaturisefrequency reconfigurable patch antenna using PIN diodes

Cited by 29 publications

References 31 publications

Pattern reconfigurable antenna with specified main lobe deflection and stable bandwidth by using bistable composite laminates

Pattern reconfigurable antenna with specified main lobe deflection and stable bandwidth by using bistable composite laminates

A Dual-Polarized, Direction Diagram Reconfigurable, Liquid Metal Antenna

Design of a Compound Reconfigurable Terahertz Antenna Based on Graphene

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