24 GHz Horizontally Polarized Automotive Antenna Arrays With Wide Fan Beam and High Gain

Yu, Chia-An; Li, Eric S.; Jin, Huayan; Cao, Yue; Su, Guan-Ren; Che, Wenquan; Chin, Kuo‐Sheng

doi:10.1109/tap.2018.2880099

Cited by 71 publications

(32 citation statements)

References 31 publications

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“…While showing adequate performances of the reflection coefficient bandwidth, the peak gain, the scan angle, and the side lobe level [12], the proposed antenna provides excellent HPBW in the elevation plane above 219 degree. The proposed array antenna has a relatively cost-effective structure compared with [7,8] and has the widest HPBW (up to 39 degree) among the three studies [7][8][9][10]. Therefore, the proposed work can play an important role as array antenna for a modern 5G mobile handset device.…”

Section: Introductionmentioning

confidence: 95%

“…Very few, however, are interested in the half power beam width (HPBW) in the elevation plane [7][8][9], which is normal to the azimuth plane (beam scanning plane), as illustrated in Figure 1a. Since mobile communications require hemispheric beam coverage, as shown in Figure 1b [10], HPBW in the elevation plane (XZ plane) is a crucial specification of the phased array antenna needed to minimize the fading caused by the shaded area [11].…”

Section: Introductionmentioning

confidence: 99%

“…The HPBWs in the elevation plane of the antennas are 133.1 degree and 180 degree, respectively. The antenna proposed in [9] introduced parasitic loop and mushroom-like element in order to broaden the beam width up to 130 degree. However, such work either has high cost structure [7,8] or beam width which is not wide enough for 5G application [9].…”

Section: Introductionmentioning

confidence: 99%

“…The antenna proposed in [9] introduced parasitic loop and mushroom-like element in order to broaden the beam width up to 130 degree. However, such work either has high cost structure [7,8] or beam width which is not wide enough for 5G application [9]. This paper proposes a 1 × 8 phased array antenna for 5G applications operating at 28 GHz with enhanced HPBW in the elevation plane using air-hole slots.…”

Section: Introductionmentioning

confidence: 99%

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A 28 GHz 5G Phased Array Antenna with Air-Hole Slots for Beam Width Enhancement

2019

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In this paper, a 28 GHz fifth-generation (5G) phased array antenna with air-hole slots for beam width enhancement is proposed. The proposed antenna consists of eight dipole radiators on a mobile handset-sized ground with air-hole slots between the two adjacent elements for enhancing the half power beam width (HPBW) in the elevation plane. The dimensions of the proposed antenna are 130 mm × 42 mm × 0.127 mm. The proposed array antenna satisfies a −10 dB reflection coefficient in the frequency range from 27.2 to 29.2 GHz with a peak gain of 10.33 dBi and a side lobe level (SLL) of 13 dB. In addition to its good performance, the proposed antenna has a very wide HPBW (measured) in the elevation plane, up to 219 degree with a scan coverage of ±45 degree in the azimuth plane. The proposed antenna demonstrates excellent hemispheric beam coverage for 5G mobile handset devices and can enable cost-effective mass production.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A 28 GHz 5G Phased Array Antenna with Air-Hole Slots for Beam Width Enhancement

2019

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“…Low profile, low cost, compact size, and ease of integration are the main concerns when solving the problems of automotive radar antenna design. In this part, we focus on the state of the art of radar antennas, especially 24 and 77 GHz automotive radar antennas [2,4,[7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

MOM/GA-Based Virtual Array for Radar Systems

Sultan

Abdullah

Abdallah

et al. 2020

Sensors

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This paper introduces a novel antenna array synthesis for radar systems based on the concept of a virtual antenna array (VAA) and the method of moments/genetic algorithm (MoM/GA) synthesis method. The VAA concept is applied to both scanning and fixed radiation pattern arrays. The proposed VAA is introduced to simultaneously support the medium-range radar (MRR) and the long-range radar (LRR) with beam width ±7° for LRR and ±37° for MRR. The proposed VAA is distinguished by its minimum number of antenna elements, simple feeding network, high efficiency, and gain, but all of these are at the expense of a large aperture antenna size compared to the planar antenna array (PAA). The VAA has the ability to have the feeding network and the radiating elements on the same layer, as compared to the multilayer PAA. The newly proposed concept is analyzed and verified analytically and experimentally. Two orthogonal (16 elements) VAAs are designed to operate in the frequency range from 23.55 to 24.7 GHz and to support a flat-shoulder shape (FSS) radiation pattern for LRR/MRR. The antenna was fabricated and tested experimentally, and good agreements between the simulated and measured results were noticed. The proposed VAA is introduced to solve the problems of large size, low isolations, low efficiency, feeding network, low resolution, and small coverage range for the antenna arrays of automotive radars. The proposed antenna array is introduced for automotive radar applications at 24 GHz.

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A 2‐element K‐band series‐fed directional antenna array for millimeter wave radar applications

Xia

Cai

et al. 2021

Int J RF Microw Comput Aided Eng

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In this paper, a K‐band series‐fed directional antenna array based on a wide bandwidth, high‐efficiency electromagnetic radiation structure is proposed for millimeter wave radar applications. Only two fundamental elements are needed to meet design specifications. By cutting off one side of the original antennas and using the grounded coplanar waveguide (CPWG) and microstrip hybrid feeding method, a series‐fed structure is innovatively developed to make the designed array simple in structure and efficient in space utilization. Simultaneously, the feed structure of the CPWG and the through‐hole vias around the antenna are proposed in combination to form a semi‐closed shielded cavity structure. It can better constrain the electric field, suppress radiation from the transmission line, alleviate the antenna radiation pattern distortion and reduce the transmission line loss. The similar beamwidth is mainly achieved in both the E‐ and H ‐planes by placing the two elements vertically perpendicular to the H‐plane. The measured relative bandwidth of the antenna array is 24%. Within the designed bandwidth (22‐28 GHz), the measured |S11| is lower than −10 dB, and the gain is basically above 10 dBi. The measured E‐ and H‐plane beamwidths are close to each other with a difference of less than 10°for each frequency, while the beamwidth value varies between 32°and 51°in the entire frequency band of 22 to 28 GHz. The simulated results are in good agreement with the measured ones.

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24 GHz Horizontally Polarized Automotive Antenna Arrays With Wide Fan Beam and High Gain

Cited by 71 publications

References 31 publications

A 28 GHz 5G Phased Array Antenna with Air-Hole Slots for Beam Width Enhancement

A 28 GHz 5G Phased Array Antenna with Air-Hole Slots for Beam Width Enhancement

MOM/GA-Based Virtual Array for Radar Systems

A 2‐element K‐band series‐fed directional antenna array for millimeter wave radar applications

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