Multiband Sector Antenna with the Same Beamwidth Employing Multiple Woodpile Metamaterial Reflectors

So, Hideya; Ando, A.; Seki, Takahiro; Kawashima, M.; Sugiyama, Takatoshi

doi:10.1587/transele.e97.c.976

Cited by 9 publications

(16 citation statements)

References 7 publications

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“…The metamaterial antenna comprises a dipole radiator and a woodpile reflector. The woodpile reflector consists of the woodpile metamaterial and has EBG characteristics [13], [17]. The woodpile reflectors can reflect/transmit electromagnetic waves according to the frequency characteristics which works as a band-stop or bandpass filter.…”

Section: A Directional Antenna Employing Woodpile Reflectormentioning

confidence: 99%

“…Fig. 3 shows the proposed lightweight woodpile meta- The thickness of the woodpile reflector should be thin because the multiband antenna discussed in [12], [13] places multiple reflectors. Then the thickness of the woodpile reflector is set to one period.…”

Section: B Lightweight Woodpile Reflectormentioning

confidence: 99%

“…Our proposed metamaterial structure can be flexibly designed in response to the directivity requirement by exploiting EBG characteristics. To design the different directivity for each frequency band, we previously proposed the multiband directional antenna structure with multiband radiators and reflectors which consist of a metamaterial [12], [13]. The metamaterial has Electromagnetic Band Gap (EBG) characteristics [14] which can reflect the electromagnetic waves at the desired band and can transmit them through the air at the other bands.…”

Section: Introductionmentioning

confidence: 99%

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Directional Antenna With Lightweight Metamaterial Reflector for UAV-Based Networks

Maruta

2021

IEEE Access

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The wireless relay network utilizing multiple Unmanned Aerial Vehicles (UAVs) has now been widely studied. Since the radio propagation in the UAV network is close to free space environment, co-channel interference to other UAVs and the ground station (GS) becomes a serious problem. Designing a directional and multiband antenna is quite effective against this issue; multiple metamaterial reflectors are our key solution. Meanwhile, the flight time of the UAV imposes a limitation on the payload weight including communication equipment. This paper proposes a directional antenna employing a lightweight metamaterial reflector to reduce the antenna weight. It is realized by the woodpile structure which consists of layers of dielectric rods with a stacking sequence. Making the hole in the center of each dielectric rod can reduce the woodpile reflector's weight with maintaining the antenna radiation performance. The electromagnetic field simulation clarified the reflection characteristics by making the hole. Both simulative and experimental evaluations clarified that the proposed antenna has almost the same radiation characteristics as the conventional one while reducing its weight by 25%, which saves the power consumption by 12.5%.

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Section: A Directional Antenna Employing Woodpile Reflectormentioning

confidence: 99%

Section: B Lightweight Woodpile Reflectormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Directional Antenna With Lightweight Metamaterial Reflector for UAV-Based Networks

Maruta

2021

IEEE Access

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“…FSS (frequency selective surface) and EBG (electromagnetic band gap) have useful characteristics for various antenna patterns. Reference [4] shows that by using multiple woodpile metamaterial reflectors and a radiator, it is possible to establish the same beamwidth for a triplefrequency band. Further, Ref.…”

Section: Introductionmentioning

confidence: 99%

Novel Cellular Active Array Antenna System at Base Station for Beyond 4G

Nakano

2017

IEICE Trans. Commun.

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SUMMARY This paper introduces a base station antenna system as a future cellular technology. The base station antenna system is the key to achieving high-speed data transmission. It is particularly important to improve the frequency reuse factor as one of the roles of a base station. Furthermore, in order to solve the interference problem due to the same frequency being used by the macro cell and the small cell, the author focuses on beam and null control using an AAS (Active Antenna System) and elucidates their effects through area simulations and field tests. The results showed that AAS can improve the SINR (signal to interference-plusnoise ratio) of the small cell area inside macro cells. The paper shows that cell quality performance can be improved by incorporating the AAS into a cellular base station as its antenna system for beyond 4G radio access technology including the 5G cellular system.

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“…It has been reported that using frequency selective reflector (FSR) as the reflector of the RBD antenna is effective to configure the multiband mobile base station antennas [5,6,7]. In the base station antennas, the beamwidth in the horizontal plane is important to cover sector service area and to suppress the interference toward the adjacent sectors [1,2].…”

Section: Introductionmentioning

confidence: 99%

HPBW control of dipole antenna with frequency selective reflector using different size elements

Cho

Ando

2016

IEICE ComEX

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This paper proposes a reflector backed dipole antenna whose reflector is composed of frequency selective reflector (FSR) and the size of the FSR elements aligned in the both side columns is changed. Since the width of the frequency selective reflector, which is composed of an array of the frequency selective elements, is chosen discretely, it is difficult to design an arbitrary beamwidth of the reflector backed antenna because the beamwidth of the reflector backed dipole antenna can be adjusted by the size of the reflector. The proposed antenna configuration can achieve arbitrary beamwidth by using different size of the FSR elements aligned in the both side columns. This paper also shows the condition of the FSR element size aligned in the both side columns to obtain sector radiation pattern. Keywords: base station antenna, mobile communication, frequency selective reflector, reflector backed dipole antenna Classification: Antennas and Propagation 90 IEICE Communications Express, Vol.5, No.3,[90][91][92][93][94] [6] H. So, A. Ando, T. Seki, M. Kawashima, and T. Sugiyama, "Directional multiband antenna employing frequency selective surfaces," Electron. Lett., vol. 49, no. 4, pp. 243-245, 2013. DOI:10.1049/el.2012 H. So, A. Ando, T. Seki, M. Kawashima, and T. Sugiyama, "Multi-band sector antenna with same beamwidth employing multiple woodpile metamaterial reflectors," IEICE Trans. References

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Multiband Sector Antenna with the Same Beamwidth Employing Multiple Woodpile Metamaterial Reflectors

Cited by 9 publications

References 7 publications

Directional Antenna With Lightweight Metamaterial Reflector for UAV-Based Networks

Directional Antenna With Lightweight Metamaterial Reflector for UAV-Based Networks

Novel Cellular Active Array Antenna System at Base Station for Beyond 4G

HPBW control of dipole antenna with frequency selective reflector using different size elements

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