Miniaturized Antipodal Vivaldi Antenna with Improved Bandwidth Using Exponential Strip Arms

Honari, Mohammad Mahdi; Ghaffarian, Mohammad Saeid; Mirzavand, Rashid

doi:10.3390/electronics10010083

Cited by 19 publications

(14 citation statements)

References 22 publications

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“…Dimensions are represented in terms of the center frequency of the antenna. The antenna designed in [31,32] provides a very good bandwidth, but its gain variation is higher, and the antenna size is also very large. In [33,34] an antenna is designed with a wide bandwidth and moderate antenna size, but its gain is small.…”

Section: Resultsmentioning

confidence: 99%

A Highly Compact Antipodal Vivaldi Antenna Array for 5G Millimeter Wave Applications

Dixit

Kumar

Urooj

et al. 2021

Sensors

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This paper presents a compact 1 × 4 antipodal Vivaldi antenna (AVA) array for 5G millimeter-wave applications. The designed antenna operates over 24.19 GHz–29.15 GHz and 30.28 GHz–40.47 GHz frequency ranges. The proposed antenna provides a high gain of 8 dBi to 13.2 dBi and the highest gain is obtained at 40.3 GHz. The proposed antenna operates on frequency range-2 (FR2) and covers n257, n258, n260, and n261 frequency bands of 5G communication. The corrugations and RT/Duroid 5880 substrate are used to reduce the antenna size to 24 mm × 28.8 mm × 0.254 mm, which makes the antenna highly compact. Furthermore, the corrugations play an important role in the front-to-back ratio improvement, which further enhances the gain of the antenna. The corporate feeding is optimized meticulously to obtain an enhanced bandwidth and narrow beamwidth. The radiation pattern does not vary over the desired operating frequency range. In addition, the experimental results of the fabricated antenna coincide with the simulated results. The presented antenna design shows a substantial improvement in size, gain, and bandwidth when compared to what has been reported for an AVA with nearly the same size, which makes the proposed antenna one of the best candidates for application in devices that operate in the millimeter frequency range.

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Section: Resultsmentioning

confidence: 99%

A Highly Compact Antipodal Vivaldi Antenna Array for 5G Millimeter Wave Applications

Dixit

Kumar

Urooj

et al. 2021

Sensors

View full text Add to dashboard Cite

show abstract

“…The size and fractional bandwidth of the proposed antenna in this work is superior to that of the reported work in [ 28 , 29 , 30 ], as shown in Table 2 . Although, the proposed antenna in [ 31 , 32 , 33 , 34 ] possess better gain and fractional bandwidth; nonetheless, with larger size, more expensive substrate, and worse group delay property. It can be observed that the proposed antenna has the advantages in compact size, fractional ultra-wide bandwidth, low cost, and good enough merit of gain.…”

Section: Resultsmentioning

confidence: 99%

Compact TSA with Anti-Spiral Shape and Lumped Resistors for UWB Applications

Duan

et al. 2021

Micromachines

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A novel compact tapered-slot-fed antenna (TSA) with anti-spiral shape and lumped resistors is presented for ultra-wideband (UWB) applications. Unique coplanar waveguide (CPW) to coplanar strip (CPS) feeding structure and exponential slot are designed to ensure the continuous current propagation and good impedance matching. With a pair of anti-spiral-shaped structure loadings at the end of the antenna, the radiation performance in lower operating band can be enhanced obviously. The typical resistor loading technique is applied to improve the time domain characteristics and expand the bandwidth. The fabricated prototype of this proposed antenna with a size of 53 × 63.5 mm2 was measured to confirm simulated results. The proposed antenna has S11 less than −10 dB in the range of 1.2–9.8 GHz, and the group delay result is only 0.4 ns. These findings indicate the proposed antenna can be taken as a promising candidate in UWB communication field.

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“…Initially, a typical AVA was modified, simulated, and developed at 5-40 GHz, and next the dimensions were optimized. Particularly, exponential patch and feed line dimensions were calculated applying the formulas provided in [56,57]. The proposed antenna includes two main tapered strips (conventional structure) and three additional curved-strip arms.…”

Section: Mavamentioning

confidence: 99%

Wearable Metamaterial Dual-Polarized High Isolation UWB MIMO Vivaldi Antenna for 5G and Satellite Communications

et al. 2021

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A low-profile Multiple Input Multiple Output (MIMO) antenna showing dual polarization, low mutual coupling, and acceptable diversity gain is presented by this paper. The antenna introduces the requirements of fifth generation (5G) and the satellite communications. A horizontally (4.8–31 GHz) and vertically polarized (7.6–37 GHz) modified antipodal Vivaldi antennas are simulated, fabricated, and integrated, and then their characteristics are examined. An ultra-wideband (UWB) at working bandwidths of 3.7–3.85 GHz and 5–40 GHz are achieved. Low mutual coupling of less than −22 dB is achieved after loading the antenna with cross-curves, staircase meander line, and integration of the metamaterial elements. The antennas are designed on a denim textile substrate with = 1.4 and h= 0.5 mm. A conductive textile called ShieldIt is utilized as conductor with conductivity of 1.8 × 104. After optimizing the proposed UWB-MIMO antenna’s characteristics, it is increased to four elements positioned at the four corners of a denim textile substrate to be employed as a UWB-MIMO antenna for handset communications, 5G, Ka and Ku band, and satellite communications (X-band). The proposed eight port UWB-MIMO antenna has a maximum gain of 10.7 dBi, 98% radiation efficiency, less than 0.01 ECC, and acceptable diversity gain. Afterwards, the eight-ports antenna performance is examined on a simulated real voxel hand and chest. Then, it is evaluated and compared on physical hand and chest of body. Evidently, the simulated and measured results show good agreement between them. The proposed UWB-MIMO antenna offers a compact and flexible design, which is suitably wearable for 5G and satellite communications applications.

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Miniaturized Antipodal Vivaldi Antenna with Improved Bandwidth Using Exponential Strip Arms

Cited by 19 publications

References 22 publications

A Highly Compact Antipodal Vivaldi Antenna Array for 5G Millimeter Wave Applications

A Highly Compact Antipodal Vivaldi Antenna Array for 5G Millimeter Wave Applications

Compact TSA with Anti-Spiral Shape and Lumped Resistors for UWB Applications

Wearable Metamaterial Dual-Polarized High Isolation UWB MIMO Vivaldi Antenna for 5G and Satellite Communications

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