Two‐element Egyptian axe dipole arrays emphasising their wideband and end‐fire radiation performance

Tang, Maochun; Ziolkowski, Richard W.

doi:10.1049/iet-map.2014.0278

Cited by 12 publications

(10 citation statements)

References 40 publications

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“…It is designed in such a manner that the antenna system exhibits high radiation efficiency and good impedance matching to the 50 Ω source without any external matching network, even though the complete antenna system is electrically small in size: ka ~ 0.63. The operating principles of this EAD NFRP antenna have been extensively explained in previous works [9], [22], [23], [31], and [47]. The surface current distributions on the metal surfaces are shown at the resonance frequency.…”

Section: A Electrically Small Electric Dipole Antennamentioning

confidence: 99%

Design and Testing of Simple, Electrically Small, Low-Profile, Huygens Source Antennas With Broadside Radiation Performance

Tang

Wang

Ziolkowski

2016

IEEE Trans. Antennas Propagat.

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108

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The efficacy of a simple, electrically small, low-profile, Huygens source antenna that radiates in its broadside direction is demonstrated numerically and experimentally. First, two types of electrically small, near field resonant parasitic (NFRP) antennas are introduced and their individual radiation performance characteristics are discussed. The electric one is based on a modified Egyptian axe dipole NFRP element; the magnetic one is based on a capacitively loaded loop (CLL) NFRP element. In both cases the driven element is a simple coax-fed dipole antenna, and there is no ground plane. By organically combining these two elements, Huygens source antennas are obtained. A forward propagating demonstrator version was fabricated and tested. The experimental results are in good agreement with their analytical and simulated values. This low profile, ~ 0.05 λ 0 , and electrically small, ka = 0.645, prototype yielded a peak realized gain of 2.03 dBi in the broadside direction with a front-to-back ratio (FTBR) of 16.92 dB. A backward radiating version is also obtained; its simulated current distribution behavior is compared to that of the forward version to illustrate the design principles.Index Terms -Broadside directivity, electrically small antennas, Huygens source, low profile, metamaterial-inspired structures, near field resonant parasitic antennas.

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Section: A Electrically Small Electric Dipole Antennamentioning

confidence: 99%

Design and Testing of Simple, Electrically Small, Low-Profile, Huygens Source Antennas With Broadside Radiation Performance

Tang

Wang

Ziolkowski

2016

IEEE Trans. Antennas Propagat.

Self Cite

108

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“…Its height is also 6.5 mm and has a D3 = 4.6 mm diameter. When this two element antenna is operating, the juxtaposition of the driven and NFRP monopole elements produces end-fire radiation as anticipated in [22].…”

Section: A Configurationsmentioning

confidence: 89%

“…The ON/OFF switch operations of the PIN diodes result in one folded monopole structure acting as the driven element and the other two folded monopole structures acting as the NFRP reflector elements [22][23][24]. By controlling the ON/OFF states of the three PIN diodes, the main beam direction is dynamically switched.…”

Section: Pattern-reconfigurable Vertically Polarized Nfrp Antennmentioning

confidence: 99%

Pattern Reconfigurable, Vertically Polarized, Low-Profile, Compact, Near-Field Resonant Parasitic Antenna

Tang

Duan

et al. 2019

IEEE Trans. Antennas Propagat.

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A vertically polarized, low-profile, compact, near-field resonant parasitic (NFRP) antenna with pattern-reconfigurability is demonstrated. The antenna has three dynamic end-fire states facilitated with only three p-in (PIN) diodes. The radiation pattern in each state covers more than 120° in its azimuth plane and, hence, it achieves beam-scanning that covers the entire azimuth plane. The antenna height and transverse size are, respectively, only 0.048 λ 0 and 0.1 λ 0 2. Measured results, in good agreement with their simulated values, demonstrate that the antenna exhibits a ~11% fractional impedance bandwidth and a ~6.6 dBi peak realized gain in all three of its pattern-reconfigurable states. Stable and high peak realized gain values are realized over its entire operational band surrounding 2.22 GHz.

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“…In this context, metamaterial inspired antenna designs have gained large interest in recent years [1][2][3][4][5][6][7][8][9]. Electrically small antennas (ESAs) moved into the focus of ongoing research [10][11][12][13][14][15], especially those exploiting split-ring resonators (SRRs) [12,[16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Efficient and Compact Near-Field Coupled Hybrid Antenna Using a Single Radiating Subwavelength Split-Ring Resonator

Dang

Rahm

2019

Electronics

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Modern applications in the realms of wireless communication and mobile broadband Internet increase the demand for compact antennas with well defined directivity. Here, we present an approach for the design and implementation of hybrid antennas consisting of a classic feeding antenna that is near-field-coupled to a subwavelength resonator. In such a combined structure, the composite antenna always radiates at the resonance frequency of the subwavelength oscillator as well as at the resonance frequency of the feeding antenna. While the classic antenna serves as impedance-matched feeding element, the subwavelength resonator induces an additional resonance to the composite antenna. In general, these near-field coupled structures are known for decades and are lately published as near-field resonant parasitic antennas. We describe an antenna design consisting of a high-frequency electric dipole antenna at f d = 25 GHz that couples to a low-frequency subwavelength split-ring resonator, which emits electromagnetic waves at f SRR = 10.41 GHz. The radiating part of the antenna has a size of approximately 3.2 mm × 8 mm × 1 mm and thus is electrically small at this frequency with a product k · a = 0.5 . The input return loss of the antenna was moderate at − 18 dB and it radiated at a spectral bandwidth of 120 MHz. The measured main lobe of the antenna was observed at 60 ∘ with a − 3 dB angular width of 65 ∘ in the E-plane and at 130 ∘ with a − 3 dB angular width of 145 ∘ in the H-plane.

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Two‐element Egyptian axe dipole arrays emphasising their wideband and end‐fire radiation performance

Cited by 12 publications

References 40 publications

Design and Testing of Simple, Electrically Small, Low-Profile, Huygens Source Antennas With Broadside Radiation Performance

Design and Testing of Simple, Electrically Small, Low-Profile, Huygens Source Antennas With Broadside Radiation Performance

Pattern Reconfigurable, Vertically Polarized, Low-Profile, Compact, Near-Field Resonant Parasitic Antenna

Efficient and Compact Near-Field Coupled Hybrid Antenna Using a Single Radiating Subwavelength Split-Ring Resonator

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