A Palm Tree Antipodal Vivaldi Antenna With Exponential Slot Edge for Improved Radiation Pattern

Oliveira, Alexandre M. de; Perotoni, Marcelo B.; Kofuji, Sérgio Takeo; Justo, J. F.

doi:10.1109/lawp.2015.2404875

Cited by 145 publications

(79 citation statements)

References 19 publications

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“…Based on the operation theory of the ETSA, Gazi proposed the antipodal Vivaldi antenna (AVA), which used the transition of microstrip line to symmetric double sided slot line and extended the impedance bandwidth. However, its gain within the operation band was low and the maximum gain was no more than 8 to 9 dBi …”

Section: Introductionmentioning

confidence: 99%

A novel miniaturized antipodal Vivaldi antenna with high gain

Yin

Yang

et al. 2019

Micro & Optical Tech Letters

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A novel antipodal Vivaldi antenna operating at an ultra‐wideband of 5.2 to 40 GHz with high gain and miniaturized size is presented in this article. By introducing a pair of radiation arms with maple‐leaf edge shape, the antenna gain is increased by 1 to 3 dB over the upper operation band (10‐40 GHz) compared to the normal antipodal Vivaldi antenna (AVA). To remain the beamwidth while increasing the gain, two rows of specialized symmetrical metallized vias are loaded on the two inside edges of the exponentially slot. By loading the resistors between the top and the bottom planes, the side lobe level at E‐plane is reduced by 3 dB. This proposed maple‐leaf antipodal Vivaldi antenna (MAVA) has the miniaturization size of 0.66λg × 0.68λg × 0.003λg. According to the simulated results, the relative bandwidth of the reflection coefficient less than −10 dB is 154%, and the gain is higher than 10 dBi over the 22 to 40 GHz band with the maximum value of 14.3 dBi. The antenna design is validated by the measurements.

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Section: Introductionmentioning

confidence: 99%

A novel miniaturized antipodal Vivaldi antenna with high gain

Yin

Yang

et al. 2019

Micro & Optical Tech Letters

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“…The coplanar lens produced by substrate end shaping technique, director made of a profiled dielectric piece with higher permittivity, hemisphere lens placed in front of the antenna, and metal director formed by parasitic patch have been proposed to produce directed radiation pattern and enhance antenna gain [5][6][7][8][9][10][11]. The corrugation edge technique is proposed to improve radiation features of lower frequencies [12][13][14]. Double-slot (DS) structure of the Vivaldi antenna in [15,16] can generate uniform aperture field distribution, which leads to achieving higher gain than the CVA with same size.…”

Section: Introductionmentioning

confidence: 99%

Dielectric Sheets Covered Broadband Vivaldi Antenna for Gain Enhancement

Li¹,

Pang²,

Wang³

et al. 2017

PIER C

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Abstract-To enhance the gain of conventional Vivaldi antenna (CVA), a novel dielectric sheets-covered Vivaldi antenna (DSCVA) is proposed. The dielectric sheets suck energy from the tapered slot region and flare termination region of the CVA, and thus act as surface wave antennas to improve end-fire performances. The CVA, DSCVA as well as the DSCVA with elongated tapered profile (SP-DSCVA) are designed, fabricated and measured. The simulation results are in good agreement with the experimental data. Measurement results show that the gain increase of the DSCVA is up to 5.1 dBi in the range of 3.5-16.5 GHz without increasing antenna length compared to the CVA. More gain enhancement is achieved for the SP-DSCVA. In addition, the half power beamwidths of the CVA as well as the sidelobe levels are improved in both E-and H-planes.

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“…The gain of the ATSA is increased, but the side lobes of the antenna pattern are also increased. To reduce the side lobe, an exponential slot edge with kotch fractal antipodal Vivaldi antenna (ESE-AVA) are designed [10], [11]. But the reflection coefficient of the antennas are fluctuating and goes above -10 dB at some frequency, indicting a poor impedance matching.…”

Section: Introductionmentioning

confidence: 99%

Low Side Lobe Tapered Slot Antenna with High Gain Using Gradient Refractive Index Metamaterial for Ultra Wideband Application

Singha¹,

Vakula²

2017

AEM

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A novel broadband gradient refractive index (GRIN) metamaterial is used to improve the gain of the tapered slot antenna. The proposed metamaterial is capable of reducing the side lobe level of the antenna. The gradient refractive index (GRIN) metamaterial is constructed by using nonresonant parallel-line unit cells with different refractive index. Due to the non-resonant structure, the proposed unit cell exhibits low loss and large frequency bandwidth. The metamaterial, effective refractive index is lower than that of the substrate on which the antenna is printed. The GRIN metamaterial is integrated in front of the antenna which has the capability to manipulate electromagnetic wave accurately. The measurement results indicate that the reflection coefficient of the antenna is below -10 dB over the frequency band from 3 to 11 GHz. The radiation pattern of the antenna shows the beam width becomes narrow and directive with low side lobe level. The peak gain is increased by 2.1 dB at 9.5 GHz. The antenna has shown significant improvement on gain at low frequency.

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A Palm Tree Antipodal Vivaldi Antenna With Exponential Slot Edge for Improved Radiation Pattern

Cited by 145 publications

References 19 publications

A novel miniaturized antipodal Vivaldi antenna with high gain

A novel miniaturized antipodal Vivaldi antenna with high gain

Dielectric Sheets Covered Broadband Vivaldi Antenna for Gain Enhancement

Low Side Lobe Tapered Slot Antenna with High Gain Using Gradient Refractive Index Metamaterial for Ultra Wideband Application

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