A Compact Dielectric-Loaded Log-Periodic Dipole Array (LPDA) Antenna

Chang, Lei; He, Songbai; Zhang, Jian Qiang; Li, Dan

doi:10.1109/lawp.2017.2744983

Cited by 36 publications

(25 citation statements)

References 10 publications

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“…The LPDA is designed by standard procedure laid out by Carrel [31] and followed by [9,23,27]. The two characteristic parameters, i.e., the bandwidth and directivity of an LPDA are determined by its spacing factor σ = S n /4L n and the scaling factor τ = L n+1 /L n [31] (see the geometry in Fig.…”

Section: Antenna Designmentioning

confidence: 99%

“…Several research studies in recent past focussed on the design of LPDAs with stable broadband electromagnetic properties [6,8,9,[23][24][25][26][27]. The antennas were printed either on rigid substrates such as Arlon, Rogers, FR4 or on 1 mm thick PET substrates and hence cannot be considered for highly flexible electronics.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we investigate the electromagnetic characteristics of a broadband LPDA antenna designed on an ultra-thin Kapton film substrate having a thickness of 0.035 mm. The motivation came from studying some of the broadband LPDA designs [25][26][27][28][29] in which compactness was achieved by deforming the basic dipole structure. For example, the LPDAs of [25,28] were based on Kochshaped dipoles, while [29] and [27] employed meandered and sinusoidally varying dipoles geometries, respectively.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Highly Bendable Log-Periodic Array Antenna for Flexible Electronics

Abutarboush¹,

Siddiqui²,

Wali³

et al. 2020

PIER M

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An eleven element log-periodic dipole-array (LPDA) antenna, occupying a surface area of only 90 × 52 mm 2 , printed on an ultra-thin flexible Kapton substrate of thickness 0.035 mm, is proposed. The antenna operates with a stricter 10 dB reflection coefficient bound in the frequency bands 2.75-3.53 GHz and 4-6.2 GHz. For a less stringent bound of 6 dB (which is acceptable for wearable applications), it operates in the wider range of 2.7-6.8 GHz. The antenna has an end-fire radiation pattern with a maximum measured gain of 6 dBi. The flexibility of the antenna is illustrated by reflection and radiation pattern measurements for three different radii, i.e., 50, 30, and 10 mm in both the convex and concave configurations. It is experimentally demonstrated that LPDA exhibits stable input-impedance characteristics and consistent radiation properties over the whole operating band under all bending conditions. The low cost, light weight, and flexible design, as well as the broadband performance in both concave and convex bent configurations, prove the suitability of the antenna for the contemporary flexible electronic devices.

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Section: Antenna Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Highly Bendable Log-Periodic Array Antenna for Flexible Electronics

Abutarboush¹,

Siddiqui²,

Wali³

et al. 2020

PIER M

View full text Add to dashboard Cite

show abstract

“…To apply the LPDA antenna to these platforms, the antenna should be miniaturized. For miniaturization of the LPDA antenna, several techniques have been introduced [2][3][4][5]. A fractal tree LPDA antenna was suggested by Wang et al [2], and a Koch-shaped fractal was applied to an LPDA antenna by Anagnostou et al [3].…”

Section: Introductionmentioning

confidence: 99%

“…A fractal tree LPDA antenna was suggested by Wang et al [2], and a Koch-shaped fractal was applied to an LPDA antenna by Anagnostou et al [3]. In other studies, a T-shaped top-loaded LPDA antenna [4] and a compact dielectric-loaded LPDA antenna [5] were introduced by Chen et al and Chang et al, respectively. These antennas are more compact than typical LPDA antennas, but they have lower gain characteristics.…”

Section: Introductionmentioning

confidence: 99%

A Compact, Low-Profile Log-Periodic Meandered Dipole Array Antenna with an Artificial Magnetic Conductor

Kwon

Lee

et al. 2018

International Journal of Antennas and Propagation

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A compact and low-profile log-periodic meandered dipole array (LPMDA) antenna with an artificial magnetic conductor (AMC) is proposed. For compactness, a meander line configuration is implemented with dipole elements and optimized using a genetic algorithm (GA) to realize the LPMDA antenna. As a result, a size reduction of approximately 30% is achieved as compared to a conventional log-periodic dipole array antenna. To enhance the gain characteristics, the AMC ground plane configuration is realized with 9 × 9 unit cells for the LPMDA antenna. Two prototypes of the proposed LPMDA antennas with and without an AMC are fabricated and measured to verify its performance. The measured −10 dB reflection ratio bandwidths are 2.56 : 1 (0.85–2.18 GHz) and 2.34 : 1 (0.92–2.16 GHz) for the proposed LPMDA antennas with and without the AMC, respectively. The gain at the main beam direction within the operating frequency bandwidth is significantly improved from 3.94–7.17 dBi to 7.86–10.01 dBi by applying the AMC.

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A miniaturized three‐dimensional log periodic Koch‐dipole array antenna using T‐shaped top loading

Xiong

Zhang

2021

Int J RF Microw Comput Aided Eng

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A log periodic dipole array antenna (LPDA) is miniaturized by using top loading. The Koch dipole further helps to shrink the antenna size. Different from the traditional LPDA that features a planar structure, the proposed log periodic Koch-dipole array (LPKDA) adopts two identical pairs of top-loaded Kochdipoles that deploy orthogonally along the feed line. This results in a tree-like three-dimensional antenna geometry, which introduces one extra dimension of freedom for antenna designers. The influence of the top-loading on antenna's impedance bandwidth is studied under the Wheeler and Chu's limit. The characteristic of the Koch-dipole is analyzed. Taking the advantage of 3D printing technology to fabricate complex models, the proposed LPKDA is printed by selective laser melting using aluminum alloy. The simulated −10-dB bandwidth is 117.4% (0.91-3.54 GHz) The LPKDA has the average gain of 5.3 dBi over the 1 to 3.5 GHz impedance bandwidth in measurement. Radiation patterns agree well in simulation and measurement. Compared with conventional LPDA of the same impedance bandwidth, the proposed LPKDA features 42%-dimensional reduction. This letter proves the feasibility of antenna optimization by using both innovative design method and advanced fabrication process.

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A Compact Dielectric-Loaded Log-Periodic Dipole Array (LPDA) Antenna

Cited by 36 publications

References 10 publications

A Highly Bendable Log-Periodic Array Antenna for Flexible Electronics

A Highly Bendable Log-Periodic Array Antenna for Flexible Electronics

A Compact, Low-Profile Log-Periodic Meandered Dipole Array Antenna with an Artificial Magnetic Conductor

A miniaturized three‐dimensional log periodic Koch‐dipole array antenna using T‐shaped top loading

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