Design of Wideband SIW Beamforming Circularly Polarized Antennas for 5G-band

Namgung, Gwang-gyun; Lee, Changhyeong; Park, Heejun; Seo, Yejun; Kahng, Sungtek; Lim, Dongjin

doi:10.1109/apcap47827.2019.9471979

Cited by 5 publications

(5 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The purpose is to realize the function of the traditional metal waveguide on the dielectric substrate. It can effectively realize passive and active integration, miniaturize the THz system, and greatly reduce the cost [ 22 , 23 , 24 , 25 ]. Moreover, its propagation characteristics are similar to those of rectangular metal waveguides, so the THz wave components and subsystems of SIW structure have the advantages of a high Q value, high power capacity, and easy integration.…”

Section: Antenna Designmentioning

confidence: 99%

Design of High-Gain Antenna Arrays for Terahertz Applications

Ji,

Chen,

et al. 2024

Micromachines

View full text Add to dashboard Cite

A terahertz band (0.1–10 THz) has the characteristics of rich spectrum resources, high transmission speed, strong penetration, and clear directionality. However, the terahertz signal will suffer serious attenuation and absorption during transmission. Therefore, a terahertz antenna with high gain, high efficiency, and wide bandwidth is an indispensable key component of terahertz wireless systems and has become a research hotspot in the field of antennas. In this paper, a high-gain broadband antenna is presented for terahertz applications. The antenna is a three-layer structure, fed by a grounded coplanar waveguide (GCPW), using polytetrafluoroethylene (PTFE) material as the dielectric substrate, and the metal through-hole of the dielectric substrate forms a substrate-integrated waveguide (SIW) structure. The metal fence structure is introduced to reduce the coupling effect between the radiation patches and increase the radiation bandwidth and gain. The center frequency is 0.6366 THz, the operating bandwidth is 0.61–0.68 THz, the minimum value of the voltage standing wave ratio (VSWR) is 1.00158, and the peak gain is 13.14 dBi. In addition, the performance of the designed antenna with a different isolation structure, the length of the connection line, the height of the substrate, the radius of the through-hole, and the thickness of the patch is also studied.

show abstract

Section: Antenna Designmentioning

confidence: 99%

Design of High-Gain Antenna Arrays for Terahertz Applications

Ji,

Chen,

et al. 2024

Micromachines

View full text Add to dashboard Cite

show abstract

“…This specific layer is seen as a superstrate, and it can be modified as a metamaterial surface to bring uncustomarily positive functions as in [9]. As stated by books and articles on metamaterials, the electromagnetic fields and waves that enter a medium will go through reflection or weakening or change in velocity, and these phenomena can be mitigated by manipulating constitutive parameters of the medium material [9][10][11]. Because the constitutive parameters such as permittivity are embedded in the velocity and refractive index, manipulating them is equivalent to manipulating the phase or phase distribution of the wave.…”

Section: Introductionmentioning

confidence: 99%

A Metamaterial Surface Avoiding Loss from the Radome for a Millimeter-Wave Signal-Sensing Array Antenna

Moon,

Kim,

Seo

et al. 2024

Sensors

View full text Add to dashboard Cite

Radar systems are a type of sensor that detects radio signals reflected from objects located a long distance from transmitters. For covering a longer range and a higher resolution in the operation of a radar, a high-frequency band and an array antenna are measures to take. Given a limited size to the antenna aperture in the front end of the radar, the choice of a millimeter-wave band leads to a denser layout for the array antenna and a higher antenna gain. Millimeter-wave signals tend to become attenuated faster by a larger loss of the covering material like the radome, implying this disadvantage offsets the advantage of high antenna directivity, compared to the C-band and X-band ones. As the radome is essential to the radar system to protect the array antenna from rain and dust, a metamaterial surface in the layer is suggested to meet multiple objectives. Firstly, the proposed electromagnetic structure is the protection layer for the source of radiation. Secondly, the metasurface does not disturb the millimeter-wave signal and makes its way through the cover layer to the air. This electromagnetically transparent surface transforms the phase distribution of the incident wave into the equal phase in the transmitted wave, resulting in an increased antenna gain. This is fabricated and assembled with the array antenna held in a 3D-printed jig with harnessing accessories. It is examined in view of S21 as the transfer coefficient between two ports of the VNA, having the antenna alone and with the metasurface. Additionally, the far-field test comes next to check the validity of the suggested structure and design. The bench test shows around a 7 dB increase in the transfer coefficient, and the anechoic chamber field test gives about a 5 dB improvement in antenna gain for a 24-band GHz array antenna.

show abstract

“…Therefore, the SIW technology has advantages in small size, low cost, low loss systems and reduces the total requirement for transition. After a series of improvements, the SIW can be applied to filters [3], [4], antennas [5], [6], power amplifiers [7], [8], power distributors [9], oscillators [10] and polarizers [11]. It is apparent that the SIW structure can be utilized in the RF front-end as a standard waveguide.…”

Section: Introductionmentioning

confidence: 99%

Compact Substrate Integrated Waveguide Filtering Antennas: A Review

Sun

Feng

et al. 2022

IEEE Access

View full text Add to dashboard Cite

In recent years, with the rapid development of integrated circuits, the filtering antenna (FA) circuit of the substrate integrated waveguide (SIW) has attracted widespread attention in wireless communications. Numerous structures have been proposed to improve the performance of SIW FA. Hence, this paper presents the development and miniaturization trend of the SIW FA, and briefly introduces the structure and historical development of the SIW FA. In terms of the mode, multi-mode cavities and incomplete mode cavities are constructed. Multi-layer structures, special structures and the slow-wave technology are constructed in physical structure. Several methods and design examples of the SIW FA miniaturization are introduced from these two aspects. Based on the combination of the filter and antenna, the FA remains the advantages of the SIW structure, mainly including small size, low insertion loss, high quality-factors, and easy integration in planar radio frequency components. Therefore, it can further reduce the circuit, allowing SIW FAs to be applied in many aspects such as the 5G (5th generation mobile communication technology) and wireless local area network communications.INDEX TERMS Substrate integrated waveguide (SIW), filtering antenna (FA), multi-mode, incomplete mode, multi-layer, slow-wave technology.

show abstract

Design of Wideband SIW Beamforming Circularly Polarized Antennas for 5G-band

Cited by 5 publications

References 4 publications

Design of High-Gain Antenna Arrays for Terahertz Applications

Design of High-Gain Antenna Arrays for Terahertz Applications

A Metamaterial Surface Avoiding Loss from the Radome for a Millimeter-Wave Signal-Sensing Array Antenna

Compact Substrate Integrated Waveguide Filtering Antennas: A Review

Contact Info

Product

Resources

About