Antipodal Vivaldi Antenna for Sum and Difference Radiation Patterns With Reduced Grating Lobes

Malakooti, Seyed-Ali; Moosazadeh, Mahdi; Ranasinghe, Damith C.; Fumeaux, Christophe

doi:10.1109/lawp.2017.2764947

Cited by 31 publications

(15 citation statements)

References 15 publications

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“…In addition, the planar structure further exhibited a wide band at a low gain of 2.8 dBi. Planar antenna such as Vivaldi antenna has been widely utilized in a range of application due to their low cross polarization, excessive directivity, and wide band characteristics . For instance, two adjacent Vivaldi taper slots excited by two ports generated end‐fire radiation along their slot direction with approximately ( α = 29°) between the two main beams to cover most of cellular and LTE bands.…”

Section: Introductionmentioning

confidence: 99%

“…Planar antenna such as Vivaldi antenna has been widely utilized in a range of application due to their low cross polarization, excessive directivity, and wide band characteristics. [18][19][20][21][22] For instance, two adjacent Vivaldi taper slots excited by two ports generated end-fire radiation along their slot direction with approximately (α = 29 ) between the two main beams to cover most of cellular and LTE bands. Such two modes are achieved at the cost of a hybrid coupler plus two excitation ports.…”

Section: Introductionmentioning

confidence: 99%

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Broadband cloverleaf Vivaldi antenna with beam tilt characteristics

Abijuru

Hamid

Seman

et al. 2020

Int J RF Microw Comput Aided Eng

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A miniature broadband Vivaldi antenna with beam tilt characteristics suitable for lower 5G bands is presented in this article. This study is rationalized by adding two symmetric taper slots rotated 90° from the original single slot planar tapered antenna and by means of positive‐intrinsic‐negative diode as the switching component. The extended design with a cloverleaf shape is developed using computer simulation technology microwave studio and fabricated by integrating active MA4AGP907 diodes. The experimental results are validated using PNA network analyzer and an echoic chamber. A wide operating bandwidth (S11 ≤ |−10| dB) from 2 to 5 GHz is exhibited during the simulation of antenna performance as well as during the experimental process. Furthermore, the proposed design achieved beam tilt in three different orientations with the maximum at ϕ equals 0°; 90° and 180° in the XY coordinates at the peak gain of 5.19 dBi. An additional feature of the proposed design is the directivity control when two or three modes are switched simultaneously. With this beam tilt ability, the antenna can be used in the development of fifth generation communication systems where multibeam and directive beam are required.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Broadband cloverleaf Vivaldi antenna with beam tilt characteristics

Abijuru

Hamid

Seman

et al. 2020

Int J RF Microw Comput Aided Eng

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show abstract

“…An exponential slot was employed to improve radiation characteristics such as gain and SLL; however, the achieved gain is low and SLL is −7 dB at 12 GHz [5]. A new design consisting of an increased length of the flares, as well as combinations of the elliptical corrugation on the outer edge and optimal shaping of inner edges, were reported in [6] to reduce SLL; however, the reduction on the SLL is limited to the bandwidth between 2.3 and 15 GHz. A novel method based on structural modification on AVA was introduced in [7] to reduce the operating frequency band; however, the results on SLLs were not reported and antenna gain was low in the limited bandwidth (i.e.…”

Section: Introductionmentioning

confidence: 99%

Sidelobe level reduction using Teflon for a microwave and millimetre‐wave antipodal Vivaldi antenna

Moosazadeh

2020

IET Microwaves, Antennas & Propagation

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A new technique for lowering the sidelobe level (SLL) of the microwave and millimetre‐wave antipodal Vivaldi antenna (AVA) has been presented in this study. The technique is based on introducing tapered‐shape Teflon surrounding AVA to couple energy propagated from the antenna and produce stronger radiation in the end‐fire direction and as a result, it offers wideband low SLL. Some features of the presented antenna with the utilised new technique are summarised as follows: high gain in wide bandwidth corrected tilt of beam on E‐plane in wide bandwidth and low cross‐polarisation level. The presented antenna is fabricated and the magnitude of the reflection coefficient of the fabricated antenna is tested, which is from 3.2–40 GHz with S11 < −10 dB. It exhibits an average of SLL < −10 dB in E‐plane and SLL < −18 dB in H‐plane at a wideband of 3.2–40 GHz. Moreover, the lowest E‐plane's SLL of −20 dB is achieved over the frequency band of 7–7.5 GHz. The proposed antenna has a small size of 43 (width) × 108 (length) mm2. The proposed antenna with the mentioned features becomes an attractive candidate for imaging applications.

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“…It is observed that a dual petal structured AVA offers more impedance bandwidth than a single petal structured AVA. In [12], it is shown that elliptical corrugations on the outer edge of AVA with optimal shaping of the inner edges of the antenna result in good impedance matching. Moreover, a patch compensated wideband Vivaldi antenna is reported in [13].…”

Section: Introductionmentioning

confidence: 99%

Binomial stub loaded compact Vivaldi antenna for superwideband applications

Ghatak

2020

Int. J. Microw. Wireless Technol.

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A compact antipodal Vivaldi antenna with superwideband characteristics is presented in this paper. For improved matching of input impedance at lower frequency region, techniques like binomial tapering of outer edges, binomial slit loaded outer edge, and protruded binomial tapered stub loading have been adopted. The antenna operates in a wide frequency range from 2 to 20 GHz. Experimental results show, stable radiation pattern with peak realized gain of more than 8 dBi, group delay within 1 ns, 164% fractional bandwidth, radiation efficiency of more than 90%, which are in good agreement with the simulated results. The compact size of the proposed antenna (1.14λ0 × 1.21λ0) with wide frequency bandwidth and directional radiation characteristics make it suitable for through-wall radar and medical imaging applications.

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Antipodal Vivaldi Antenna for Sum and Difference Radiation Patterns With Reduced Grating Lobes

Cited by 31 publications

References 15 publications

Broadband cloverleaf Vivaldi antenna with beam tilt characteristics

Broadband cloverleaf Vivaldi antenna with beam tilt characteristics

Sidelobe level reduction using Teflon for a microwave and millimetre‐wave antipodal Vivaldi antenna

Binomial stub loaded compact Vivaldi antenna for superwideband applications

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