Penta-band Dual-fed Smart Glasses IoT Antenna

Xiao, Bing; Wong, Hang; Yeung, Kwan L.

doi:10.23919/eucap48036.2020.9136030

Cited by 6 publications

(5 citation statements)

References 19 publications

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“…To excite the even modes, we could mount a capacitive coupling element (CCE) in the middle point [31], [19], as shown in Fig. 4(b).…”

Section: B Methods Of Feedingmentioning

confidence: 99%

“…8. In our research in [19], the proposed dipole antenna had two ports. One was embedded in the middle point of the dipole to excite the odd modes.…”

Section: B Methods Of Feedingmentioning

confidence: 99%

“…So, tuning the resonant frequencies of the dipole antenna is necessary. In [19], the frequency tuning was achieved by two impedance matching circuits separately for odd and even modes. However, this method is indirect and increases the complexity of the circuits.…”

Section: Tuning Of Resonant Frequenciesmentioning

confidence: 99%

“…For an intuitive comparison, all the above-mentioned multi-mode dipole antennas are summarized in Table I. [10] ** The symmetric meandered planar dipole in [13] *** The offset meandered planar dipole in [13] Our preliminary research on the multi-mode dipole antenna has been presented in EuCAP 2020 [19]. It was a dual-fed dipole antenna.…”

Section: Introductionmentioning

confidence: 99%

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Utilization of Both Odd and Even Modes for Multi-band Dipole Antenna

Xiao¹

2021

Preprint

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<p>Dipole antenna is the simplest type of antenna from the theoretical point of view. However, the majority of the research on it focuses on adding supplementary structures for producing more resonant modes to achieve more functions. Here, we focus on the inherent modes of the dipole itself. The dipole antenna has alternating odd and even modes. In classical antenna theory, only odd modes are excited. The even modes are difficult to be excited due to their very high input impedances. In this paper, both odd and even modes of the dipole antenna are excited simultaneously by a single port with a novel feeding structure. Moreover, in order to tune the resonant frequencies of such multiple modes, a method by combining antithetical structures of indentations and outdentations is proposed and intuitively explained by eigencurrent distribution. By these new techniques, all the first six modes of the dipole antenna are excited, among which five modes are utilized for IoT applications. The antenna could cover ISM bands of 868 MHz and 2450 MHz, GNSS band of 1575 MHz, and 5G bands of 3500 MHz and 4900 MHz. This research could broaden the application of this classic antenna.<br></p>

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“…To excite the even modes, we could mount a capacitive coupling element (CCE) in the middle point [31], [19], as shown in Fig. 4(b).…”

Section: B Methods Of Feedingmentioning

confidence: 99%

“…8. In our research in [19], the proposed dipole antenna had two ports. One was embedded in the middle point of the dipole to excite the odd modes.…”

Section: B Methods Of Feedingmentioning

confidence: 99%

Section: Tuning Of Resonant Frequenciesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Utilization of Both Odd and Even Modes for Multi-band Dipole Antenna

Xiao¹

2021

Preprint

Self Cite

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“…Other studies compare an antenna conventionally manufactured on a PCB (FR4) and a printed antenna using jetting technology on a PC + ABS (Polycarbonate and Acrylonitrile Butadiène Styrène) polymeric substrate [11]. Other progresstoward designing compact antennas for IoT has appeared in the literature [12][13][14][15][16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

On the Reuse of a Matching Network for IoT Devices Operating at 900 MHz Embedding Antenna Boosters

Gui¹,

Andújar²,

Anguera

2022

Electronics

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The Internet of Things (IoT) is evolving rapidly, enabling more new applications than ever before. Some radio systems in the IoT space used to connect things with things operate at the 863–928 MHz frequency band (e.g., LoRa, ISM). IoT wireless devices at 900 MHz need an efficient antenna to send data into the cloud, and ensure range and long battery life. Moreover, the antenna should be easy to use across different device sizes. In this regard, antenna booster technology is proposed, which relies on a tiny element called an antenna booster, able to excite radiation currents on the ground plane of the IoT device. The antenna booster in this paper is only 12 mm × 3 mm × 2.4 mm (height), representing only ~λ/30 at 863 MHz. Such an antenna booster is reactive across the 863–928 MHz frequency range and, thus, a matching network is needed. The paper first proposes a matching network on a 120 mm × 60 mm ground plane. Afterward, an analysis is carried out to find the set of different ground plane sizes where the same matching network as the one used for the 120 mm × 60 mm ground plane can be reused, ensuring an S11 < −6 dB. The goal is to find a map representing a cluster of ground planes where the same antenna system can be used (the same antenna booster and the same matching network) to simplify the design of IoT devices embedding antenna boosters. The analysis is addressed using MoM (Method of Moments) electromagnetic software (IE3D) and validated through measurements. Results indicate that a broad set of device sizes can reuse the same matching network with the same antenna booster, thus, simplifying and accelerating the design of IoT devices since no adjustment is needed on the antenna system.

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