Experimental Validation of Performance Limits and Design Guidelines for Small Antennas

Sievenpiper, Daniel F.; Dawson, D.C.; Jacob, Minu M.; Kanar, Tumay; Kim, Sang-Hoon; Long, Jiang; Quarfoth, Ryan

doi:10.1109/tap.2011.2167938

Cited by 235 publications

(119 citation statements)

References 144 publications

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“…Figure 15 shows the efficiency based on wheeler and Chu formula [40] that is shown in relation 10 and 11. A theoretical efficiency of 99.99 % has been achieved by the proposed antenna…”

Section: Resultsmentioning

confidence: 99%

Design of a Novel Super Wide Band Circular-Hexagonal Fractal Antenna

Ali¹,

Islam²,

Azim³

2013

PIER

100

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Abstract-In this paper, a novel circular-hexagonal Fractal antenna is investigated for super wide band applications. The proposed antenna is made of iterations of a hexagonal slot inside a circular metallic patch with a transmission line. A partial ground plane and asymmetrical patch toward the substrate are used for designing the antenna to achieve a super wide bandwidth ranging from 2.18 GHz to 44.5 GHz with a bandwidth ratio of 20.4 : 1. The impedance bandwidth and gain of the proposed antenna are much better than the recently reported super wideband antennas which make it appropriate for many wireless communications systems such as ISM, Wi-Fi, GPS, Bluetooth, WLAN and UWB. Details of the proposed antenna design are presented and discussed.

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“…Figure 15 shows the efficiency based on wheeler and Chu formula [40] that is shown in relation 10 and 11. A theoretical efficiency of 99.99 % has been achieved by the proposed antenna…”

Section: Resultsmentioning

confidence: 99%

Design of a Novel Super Wide Band Circular-Hexagonal Fractal Antenna

Ali¹,

Islam²,

Azim³

2013

PIER

100

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“…The gain and directivity of Fig. 6 are used to determine the efficiency of the antenna as outlined in [3].…”

Section: Measurementmentioning

confidence: 99%

“…Electrically small antennas find use in applications where the size of the antenna must be minimized at the cost of bandwidth or efficiency. Generally, the designs that fare best have aspect ratios near unity [3] and show a uniformity in the distribution of fields surrounding the antenna. Newly developed electrically small magnetic dipole antennas demonstrate radiation Q's near the lower limit defined by Chu.…”

Section: Introductionmentioning

confidence: 99%

A Simplified Low-${Q}$ Electrically Small Magnetic Dipole Antenna

Madsen

Zhou

Sievenpiper

2016

Antennas Wirel. Propag. Lett.

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Abstract-An electrically small wire cage antenna is presented as an alternative to previously proposed spherical split-ring (SSR) antennas, which achieve Q's near the lower limit defined by Chu. This design is targeted to approach the same lower bound, but constructed in a manner more economical for production. The proposed dual-polarized wire cage structure is produced using a standard dielectric substrate which is patterned front and back with copper, using well-defined and reproducible etching procedures. The thin interdigitated structure is then placed over a ground plane using rigid conducting elements that help to suspend the dielectric substrate while completing the wire cage. A parameterized HFSS model was used to optimize performance. Measurements were made on fabricated prototypes that demonstrate performance consistent with simulated results, confirming that SSR antennas and their derivatives are capable of approaching Chu's limit on the radiation efficiency of electrically small antennas.Index Terms-Chu limit, electrically small antenna, magnetic dipole antenna, spherical split ring, wire cage antenna.

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“…For many decades, electrically small antenna (ESA) is a hot topic in antenna research due to its compact form and potential usefulness in many wireless communication systems [1]. An antenna is considered as an ESA if it can be completely enclosed within a radian sphere [2].…”

Section: Introductionmentioning

confidence: 99%

Electrically-Small Circularly-Polarized Quasi-Yagi Antenna

Ta¹

2018

PIER Letters

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Abstract-In this letter, an electrically-small circularly polarized (CP) quasi-Yagi antenna is presented. It is composed of three elements; i.e., a compact single-feed crossed-dipole antenna acted as the driver and two parasitic elements acted as the reflector and director, respectively. Each arm of all elements contains a meander line with an arrowhead ending to realize compactness. The driver has double vacant-quarter printed rings incorporated into it to generate the CP radiation. The parasitic elements are incorporated with the crossed-dipole driver to not only produce a directive radiation, but also broaden the antenna bandwidth. The final design with overall size of 35 mm × 35 mm × 27 mm (0.184λ o × 0.184λ o × 0.142λ o at 1.575 GHz, ka = 0.93) a measured 10-dB bandwidth of 19.23% (1.476-1.790 GHz), 3-dB axial ratio bandwidth of 7.67% (1.505-1.625 GHz), a broadside gain of 3.0 ± 0.2 dBic, and the maximum front-to-back ratio of 8.2 dB. The proposed antenna is applicable to a variety of wireless system operating near 1.575 GHz, such as Global Positioning Systems, Global Navigation Satellite Systems, as well as international maritime satellite organization (Inmarsat) networks.

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Experimental Validation of Performance Limits and Design Guidelines for Small Antennas

Cited by 235 publications

References 144 publications

Design of a Novel Super Wide Band Circular-Hexagonal Fractal Antenna

Design of a Novel Super Wide Band Circular-Hexagonal Fractal Antenna

A Simplified Low-${Q}$ Electrically Small Magnetic Dipole Antenna

Electrically-Small Circularly-Polarized Quasi-Yagi Antenna

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