Hybrid Zeroth-Order Resonance Patch Antenna With Broad $E$-Plane Beamwidth

Ko, Sangjin; Lee, Jeong‐Hae

doi:10.1109/tap.2012.2220315

Cited by 61 publications

(46 citation statements)

References 12 publications

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“…The proposed antennas can be implemented on a thin, single‐layered air substrate without introducing additional multiple elements, feed network, or cavity . Unlike the narrow band design, they remarkably exhibit a wide impedance bandwidth up to 16%. Compared to the complicated design having 20 design parameters and height up to 0.2‐wavelength, our proposed antennas have simple configurations with only seven key design parameters and exhibit a low‐profile characteristic.…”

Section: Measurement and Verificationmentioning

confidence: 99%

Wide beamwidth planar self‐balanced magnetic dipole antenna with enhanced front‐to‐back ratio

Shen

et al. 2020

Int J RF Microw Comput Aided Eng

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A design approach to a novel planar self‐balanced, wide beamwidth magnetic dipole antenna with high front‐to‐back ratio (FBR) is advanced. The principle for FBR enhancement is revealed at first. As seen, the back‐lobe level can be effectively suppressed by adjusting the unbalanced current ratio (UCR) factor: By varying the radius of the circular sector magnetic dipole antenna on the bottom layer and incorporating an arc‐shaped branch at the end of the parasitic strip, the UCR factor can be properly tuned, and the back‐lobe level can be flexibly controlled. Then, a set of closed‐form formulas is derived to provide basic design guidelines and determine the initial value of key parameters. Parametric studies on FBR are then carried out to attain the ultimate designs in a step‐by‐step manner. As numerically and experimentally verified at the 2.45‐GHz band, the FBR of a planar, air‐substrate magnetic dipole antenna is indeed increased to over 30 dB with broadened E‐/H‐plane half‐power beamwidth up to 130°/90°. Good agreement between the theoretical, numerical, and experimental results has evidently validated the proposed antenna design approach.

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Section: Measurement and Verificationmentioning

confidence: 99%

Wide beamwidth planar self‐balanced magnetic dipole antenna with enhanced front‐to‐back ratio

Shen

et al. 2020

Int J RF Microw Comput Aided Eng

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“…ZOR antenna designs includes combining f sh and first‐order resonance ( f 1 ) to get a hybrid resonance by a circular patch in a mushroom cell. In Reference , horizontal and vertical polarizations are obtained by horizontal and vertical topology at f sh for two different antennas.…”

Section: Introductionmentioning

confidence: 99%

Circularly polarized dual‐band zeroth order epsilon negative antenna using asymmetric unit cells

Murugan

Reddy

Damodharan

2019

Int J RF Microw Comput Aided Eng

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In this paper, a dual‐band zeroth order resonance (ZOR) circularly polarized epsilon negative antenna is proposed for the case where shunt ZOR (fsh) is higher than series ZOR (fse). Epsilon negative unit cells resonate fsh, while a pseudo‐open termination unit cell with a series capacitance resonate fse, resulting in a dual‐band ZOR. The pseudo‐open termination unit cell can be placed anywhere around the epsilon negative unit cells for proper matching. Circular polarization (CP) is achieved by creating orthogonal components using asymmetric unit cells (AUCs). Zeroth order resonator inherently provides 90° phase shift between two orthogonal polarizations. Left hand circular polarization (LHCP) is achieved by adding stubs to the unit cells with two 90° right bends. Electric field distribution is used to verify the resonances for zeroth order and it is found that both the resonances follow zeroth order characteristics. The measured resonances are 4.11 GHz (fse) and 4.60 GHz (fsh) with measured average axial ratio of 2.4 dB at fse and 1.5 dB at fsh, respectively. The measured LHCP peak gain for fse is 1.53 dBic and for fsh is 2.34 dBic. The proposed design covers a frequency range of 3.6 to 4.6 GHz by varying the length of the stubs.

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“…In [12], a wideband folded mushroom zeroth-order resonance (ZOR) antenna combines the TM 010 (λ/2) mode and ZOR mode to obtain a wide bandwidth of 68%; however, due to the folding structure, the structure of the antenna is very complicated. In [13], a hybrid zeroth-order resonance (ZOR) patch antenna also combined a TM 010 (λ/2) mode and a ZOR mode with a bandwidth of 3.3% while the E-plane HPBW of the proposed antenna was measured as 115 • and broadened by 53%, compared with that of the conventional rectangular patch antenna. In [14], the antenna was loaded by ZOR and complimentary split-ring resonator (CSSR) units, and the antenna resonated at three frequency bands Similarly, in [15], the zeroth-order and TM 10 modes of a composite right/left-handed (CRLH) mushroom resonator were investigated with regard to the number of cells.…”

Section: Introductionmentioning

confidence: 99%

T/L-Shaped Zeroth-Order Resonators Loaded Microstrip Antenna With Enhanced Bandwidth for Wireless Applications

Sun¹,

Peng²,

Li³

et al. 2018

PIER C

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Abstract-New zeroth-order resonators (ZORs) are utilized as parasitic elements to enhance a microstrip antenna's bandwidth. By utilizing mushroom T/L shaped resonators, extra resonances are generated. Then, by merging the resonances of the microstrip antenna and the T/L shaped resonators, a wideband antenna is obtained to cover the 5.15-5.35 GHz wireless local area network (WLAN) band. As the ZORs are embedded in the patch of the microstrip antenna, the usages of the parasitic elements do not increase the antenna size. Moreover, as one ZOR resonance is lower than the microstrip patch resonance, a compact antenna is realized. The patch size is decreased from 0.27λ c ×0.42λ c ×0.027λ c of the reference microstrip antenna (RMA) to 0.25λ c × 0.40λ c × 0.026λ c of the proposed ZOR based microstrip antenna, where λ c is the wavelength of their corresponding lower cutoff frequencies. The proposed antenna was fabricated and measured. The simulated and measured −10 dB impedance bands of the proposed antenna are 5.06-5.40 GHz and 5.07-5.42 GHz, respectively. And, its bandwidth increases 70% compared to the RMA. The simulated and measured patterns are stable in the whole operating band. The gains of 4.73 dBi and 4.24 dBi are measured at the ZOR modes, and 7.88 dBi is measured at the microstrip patch mode.

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Hybrid Zeroth-Order Resonance Patch Antenna With Broad $E$-Plane Beamwidth

Cited by 61 publications

References 12 publications

Wide beamwidth planar self‐balanced magnetic dipole antenna with enhanced front‐to‐back ratio

Wide beamwidth planar self‐balanced magnetic dipole antenna with enhanced front‐to‐back ratio

Circularly polarized dual‐band zeroth order epsilon negative antenna using asymmetric unit cells

T/L-Shaped Zeroth-Order Resonators Loaded Microstrip Antenna With Enhanced Bandwidth for Wireless Applications

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