Analysis of skew antenna around a square tower for UHF TV broadcasting

Shimizu, Yasusada; Shigeta, Kazuo; Yukawa, K.; Nakamura, Takashi; Mikkaichi, Masashi; Nagasawa, Yoji; Sato, Ryo

doi:10.1109/8.7197

Cited by 5 publications

(3 citation statements)

References 1 publication

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“…For instance, in Ref. [ ], an effort is made to install UHF antennas on an existing tower containing VHF antennas, and mutual interference is studied, but it is unclear whether the tower has an effect on the characteristics of the antennas. Furthermore, the effect of tower on the radiation pattern depends on the frequency, azimuth, and elevation angle in the near field .…”

Section: Introductionmentioning

confidence: 99%

Parasitic effects of the metallic towers on the characteristics of the broadcast antennas

Ali

Colantonio

Altintas

2017

Int J RF Microw Comput Aided Eng

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In this article, we use a tool NEC (Numerical Electromagnetic Code) to model antenna on top of a tower structure. Simulation results for the parasitic effect of the tower on characteristics of broadcast DVB‐T (Digital Video Broadcasting Terrestrial) antenna such as input impedance, return loss, gain, front‐to‐back ratio and radiation patterns are reported. In addition, the effect of a nearby tower on antenna characteristics is studied. A 3D tower and broadband antenna in the UHF (470‐862) MHz band are constructed. The antenna works for both digital and analog TV with return loss (RL) ≥ 10 dB, fractional bandwidth of 87% and gain of 12.3 dBi at center frequency. The effective radiated power is calculated by mounting the antenna at each face of the tower to give a satisfactory coverage to a region around the antenna.

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Section: Introductionmentioning

confidence: 99%

Parasitic effects of the metallic towers on the characteristics of the broadcast antennas

Ali

Colantonio

Altintas

2017

Int J RF Microw Comput Aided Eng

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“…In Ref. , mutual interference from UHF and VHF antennas on an existing tower (metal structure) is studied, but it is not studied whether the tower has any effect on the characteristics of the antennas. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Feasibility study of installation of solar panels on a high power HF antenna land

Ali

Ozbey

Topçu

et al. 2016

Int J RF and Microwave Comp Aid Eng

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In HF broadcasting, the transmitters are typically very powerful. In the case of Turkish Radio and Television (TRT), total transmission average power may reach up to 5 MW. Therefore, it is natural to utilize solar panels as a means of alternative/backup energy for the continuous transmission of RF signal satisfying the requirement of broadcasting. In the TRT HF broadcasting array field, two areas are designated as the candidate areas for solar panel installation. In these areas, electric fields are simulated, measured, and compared. Simulations are done using the Numerical Electromagnetic Code (4nec2). The suitability of the regions for the solar panel installation are evaluated based on the ICNIRP human exposure limits. In addition, 4nec2 simulations are used to see the effect of metal frames of solar panels on the radiation patterns of the short‐wave antenna arrays in the two solar panel candidate areas of TRT HF broadcasting station. Simulation results show that metal frames do not seem to have a significant effect on the radiation patterns of the short‐wave antenna arrays. © 2016 Wiley Periodicals, Inc. Int J RF and Microwave CAE 26:379–384, 2016.

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“…The LF magnetoelectric mechanical antenna pair may be a promising candidate for the portable electronics and IoT applications.Radio-frequency communication has been a critical component for human society since its invention in the late nineteenth century 1, 2 . A variety of radio-frequency communication systems, such as medium frequency(MF) for AM radio communications, ultra-high frequency(UHF) communication systems for television broadcasting and cellphone communications [3][4][5][6][7] , and mmWave for 5G communications and mmWave radar 8-10 have been widely implemented based on scientific and technological advancements, which greatly improve our daily life. As the interface between radio waves propagating through space and electric currents moving in metal conductors, antennas have emerged since the beginning of 20 th century as one of the most critical components in radio-frequency communications.…”

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confidence: 99%

A miniaturized low frequency (LF) magnetoelectric receiving antenna with an integrated DC magnetic bias

Niu

Ren

2021

Applied Physics Letters

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Low frequency communication systems offer significant potential in portable electronics and internet of things (IoT) applications due to the low propagation loss and long transmission range. However, because the dimension of electrical antenna is comparable to one quarter wavelength of the electromagnetic wave that it transmits and receives, currently a gap exists between LF communication systems and IoT, as IoT generally implement miniaturized electrical antennas with a small wavelength at a high frequency while traditional LF electrical antennas are too bulky. In this paper, we present an LF magnetoelectric mechanical transmitting and receiving antenna pair to significantly miniaturize the dimension of LF antennas. As the operation principle of the magnetoelectric mechanical antenna pair is based on mechanical resonance, its dimension is reduced by four orders of magnitude compared with an electrical antenna counterpart. The transmitting and receiving antennas are the same in structure and dimensions: they are both composed of magnetostrictive Terfenol-D and piezoelectric PZT laminate, and their dimensions are both 38ⅹ12ⅹ8.2mm 3 . Both the transmitting and receiving antennas are integrated with DC magnetic bias to improve its performance. Antenna pair performance measurement demonstrates that a maximum operation distance of 9m is demonstrated with DC magnetic bias, while maximum operation distance without DC magnetic bias is 4m, which is reduced by 56%. The LF magnetoelectric mechanical antenna pair may be a promising candidate for the portable electronics and IoT applications.Radio-frequency communication has been a critical component for human society since its invention in the late nineteenth century 1, 2 . A variety of radio-frequency communication systems, such as medium frequency(MF) for AM radio communications, ultra-high frequency(UHF) communication systems for television broadcasting and cellphone communications [3][4][5][6][7] , and mmWave for 5G communications and mmWave radar 8-10 have been widely implemented based on scientific and technological advancements, which greatly improve our daily life. As the interface between radio waves propagating through space and electric currents moving in metal conductors, antennas have emerged since the beginning of 20 th century as one of the most critical components in radio-frequency communications. The earliest antennas were wire type, primarily as single elements 11 . In the past 40 years, advanced antennas including microstrip antennas, dielectric resonator antennas, and multiple input-multiple output (MIMO) technology are extensively studied [12][13][14] . The microstrip antennas are applied in television broadcasting 15 and 5G WLAN application 16 . The waveguide slot antennas and MIMO antennas are applied in 5G communication systems and mmWave radar [17][18][19] .Low frequency(LF) antennas, which operate at frequencies between 30-300kHz, have been widely implemented in meteorological broadcasts, radio navigation, and underwater communication 20,21 . Compa...

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Analysis of skew antenna around a square tower for UHF TV broadcasting

Cited by 5 publications

References 1 publication

Parasitic effects of the metallic towers on the characteristics of the broadcast antennas

Parasitic effects of the metallic towers on the characteristics of the broadcast antennas

Feasibility study of installation of solar panels on a high power HF antenna land

A miniaturized low frequency (LF) magnetoelectric receiving antenna with an integrated DC magnetic bias

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