A mobile satellite news gathering system using a flat antenna

Mitsumoto, Hideo; Murata, Takuya; Takano, Kouichi; Fujita, Masaru; Tanaka, Shōji; Itoh, Shoji; Shogen, Kazuyoshi; Toyama, N.; Miyazawa, H.

doi:10.1109/11.536591

Cited by 17 publications

(6 citation statements)

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“…Tilted-beam antennas have attracted tremendous attention in various applications [ 1 , 2 ], such as radar systems, RF base station, mobile communication systems, and satellite communication systems. These antennas are capable of radiating beams toward the intended direction to avoid the interference of noise source.…”

Section: Introductionmentioning

confidence: 99%

Tilted-Beam Antenna Based on SSPPs-TL with Stable Gain

Wei¹,

Geng²,

Zhang³

et al. 2021

Sensors

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In this paper, a titled-beam antenna based on spoof surface plasmon polaritons (SSPPs) transmission lines (TLs) is proposed. The parallel SSPPs-TL is a slow-wave TL, which is able to limit waves in the TL strictly. By periodically introducing a set of tapered stubs along the SSPPs-TL, the backward endfire beams are formed by the surface waves in the slow-wave radiation region. Then, through the placement of a big metal plate below the endfire antenna, the backward endfire beams are tilted, and the tilted angle of the beams are steered by the distance of the metal plate and antenna. Over the band of 5.7 GHz~7.0 GHz, the tilted antenna performs constant shapes of radiation patterns. The gain keeps stable at around 12 dBi and the 1-dB gain bandwidth is 20%. The measured results of the fabricated prototypes confirm the design theory and simulated results.

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Section: Introductionmentioning

confidence: 99%

Tilted-Beam Antenna Based on SSPPs-TL with Stable Gain

Wei¹,

Geng²,

Zhang³

et al. 2021

Sensors

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“…ide-angle scanning phased array antennas [1] are highly desirable in many civil, military, space and satellite applications, such as satellite phones and television [2], Manuscript received XXXXXXXX; revised XXXXXXXXXXX; accepted XXXXXXXXXXXXX. Date of publication XXXXXXXXXXXXX; date of current version XXXXXXXXX H. Zhou, A. Pal and A. Mehta are with the College of Engineering, Swansea University, Swansea SA1 8EN, U.K. (e-mail: 686785@swansea.ac.uk; a.pal@swansea.ac.uk; a.mehta@swansea.ac.uk).…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable Phased Array Antenna Consisting of High-Gain High-Tilt Circularly Polarized Four-Arm Curl Elements for Near Horizon Scanning Satellite Applications

Zhou

Pal

Mehta

et al. 2018

Antennas Wirel. Propag. Lett.

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A 2×2 phased array consisting of beam reconfigurable four-arm Right Handed Circularly Polarized (RHCP) curl unit elements antenna is presented. This array is designed at test frequency of 5.2 GHz and can undertake a high-gain near-the-horizon scanning with low grating lobes. Each curl antenna element has four ports and can provide four RHCP tilted-beams ( = 48°) with a gain of 8.3 dBic. By switching the feeding ports, the curl element can reconfigure / switch these unit element beams in four different quadrants in space. The array exploits these high-gain high-tilt switchable beams for generating an extremely wide scanning range from-80° ≤  ≤ +80°. For the 2×2 array, in this range, the beam has a maximum gain of 12.4 dBic at  = 40°. More importantly, the array provides RHCP beams with a gain of 10.5 dBic at near-the-horizon angles of  ≈ 70° and provides a lower gain of 6.5 dBic in the zenith direction. This has promising applications in Communications On The Move (COTM) using Flat Panel Antenna (FPA) to Geosynchronous Orbit (GSO) satellites. Here, when operating at high latitudes require high-gain at near-the-horizon angles.

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“…In contrast, a pattern switchable antenna (PSA) is compact, economically efficient and easy to operate. In recent years, PSAs have been implemented in many communication systems, such as radars [11], wireless local area networks [12], personal communications [13], and satellite communications [14]. Various planar structures have been proposed for realising PSAs, for instance, the microstrip antennas [15][16][17][18], square loop antennas [19][20][21], and spiral antennas [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Low profile pattern‐switchable multibeam antenna consisting of four L‐shaped microstrip lines

Zhang

Pal

Mehta

et al. 2018

IET Microwaves, Antennas & Propagation

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A multibeam antenna consisting of a set of four L-shaped microstrip line sections is presented for pattern switchable applications. A planar electromagnetic band gap substrate is implemented to reduce the antenna profile to λ2.45/35, where λ2.45 is the free space wavelength at a design frequency of 2.45 GHz. An impedance matching network is integrated on the lowest layer below a ground plane. The microstrip lines have a resonant frequency of 2.45 GHz and are excited separately. When one of the strips is excited, the antenna generates a tilted beam with a gain of 8.6 dBi. By switching the excitation strip sequentially, a full azimuth beam steering is achieved. When the antenna is located above a large conducting reflector, the antenna maintains its performance. Thus, the antenna is a candidate for moving objects with high speed internet and vehicular tracking.

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A mobile satellite news gathering system using a flat antenna

Cited by 17 publications

References 0 publications

Tilted-Beam Antenna Based on SSPPs-TL with Stable Gain

Tilted-Beam Antenna Based on SSPPs-TL with Stable Gain

Reconfigurable Phased Array Antenna Consisting of High-Gain High-Tilt Circularly Polarized Four-Arm Curl Elements for Near Horizon Scanning Satellite Applications

Low profile pattern‐switchable multibeam antenna consisting of four L‐shaped microstrip lines

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