Compact filtering antenna using asymmetric CPW-fed based CRLH structure

Choudhary, Dilip Kumar; Chaudhary, Raghvendra Kumar

doi:10.1016/j.aeue.2020.153462

Cited by 12 publications

(3 citation statements)

References 19 publications

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“…On the other hand, for the antenna elements operating at different frequencies, filtennas that select signals in the required band and reject the undesired signals have been developed to effectively suppress the mutual coupling between them. The designs in [16]- [22] are mainly achieved by structural transformation of the antenna. Also, substrate integrated waveguide (SIW) technology has been widely employed in the designing of filtennas in [23]- [26], but they are suffering from limited bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Wideband Self-Decoupling Dielectric Patch Filtennas With Stable Filtering Response

2022

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Wideband self-decoupling of bandwidth-enhanced dielectric patch (DP) filtennas with stable filtering response are proposed in this letter. The TM101 and TE121 modes of the DP are combined to design a wideband antenna while its high-order TM111 mode is used to introduce an intrinsic upper radiation null, leading to a good filtering response. Sequentially, 1×2 DP filtennas have been taken as an example to verify that improving the isolation can keep the filtering performance of the filtenna array basically consistent with the original filtenna element, which is a design concept proposed for the first time in this paper. To maintain almost the same filtering response when the antenna elements are spaced closely, the wideband self-decoupling between the antenna elements is obtained by properly choosing the parameters (i.e. dielectric constants of the DP and substrate), without adding extra decoupling structures. For validation, 1×2 closely-spaced filtennas are fabricated and tested. The measured results denote that the prototype has impedance bandwidth (|S11| < -10 dB) of about 21.2% from 4.47 GHz to 5.53 GHz and in-band isolation is over 20 dB. Benefiting from the self-decoupling scheme, the difference of the in-band gain and stopband suppression between the element and 1×2 DP filtennas is reduced significantly, showing stable filtering response of the filtennas.INDEX TERMS Self-decoupling, dielectric patch (DP) filtenna, wideband, stable filtering response.

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Section: Introductionmentioning

confidence: 99%

Wideband Self-Decoupling Dielectric Patch Filtennas With Stable Filtering Response

2022

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“…The integration approach in, 11,12 improves impedance bandwidth and suppression in the stopband, but did not have an omnidirectional pattern. The filtenna in Reference 19, utilized a CRLH‐TL structure with CPW feed to obtain wide impedance bandwidth.…”

Section: Introductionmentioning

confidence: 99%

Synthesis approach to design a compact printed monopole filtenna for 2.4 GHz Wi‐Fi application

Pal

Sinha

Mahto³

2021

Int J RF Microw Comput Aided Eng

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This communication presents a compact low cost filtenna (35 mm × 30 mm) operating in 2.31 to 2.49 GHz spectrum for possible applications pertaining to 2.4 GHz Wi‐Fi standards 802.11b, 802.11g, and 802.11n. Initially, two microstrip square open loop resonators are designed to serve as band‐pass filters with resonant frequency of 2.4 GHz. Adapting the synthesis approach, the second resonator is replaced by inverted L‐shaped monopole antenna designed at 2.4 GHz. The antenna is integrated to filter through coupled line admittance inverter to form a compact module with near zero insertion loss within the proposed operating frequency band, filtenna possess uniform omnidirectional radiation pattern in H‐plane and monopole pattern in E‐plane, steep skirt at both edges, 7.5% fractional bandwidth, good return loss and low cross polarization characteristics. The simulated design is validated by measurements of parameters of prototype fabricated on FR4 substrate, slight acceptable discrepancy is experienced which can be attributed to fabrication tolerances and variation in material characteristics.

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“…High performance DRA mainly includes wide band [11], broadband circular polarization [12][13][14], miniaturization [15], and high gain [16,17]. Like the metal filter antenna [22,23], dielectric resonator antenna also has filtering characteristics by digging grooves in the floor, changing the feed, etc. Furthermore, the performance of the DRA can be improved by improving and innovating the shape and feed structure of the DRA.…”

Section: Introductionmentioning

confidence: 99%

A Conformal Quasi-Isotropic Dielectric Resonator Antenna for Wireless Capsule Endoscope Application

Xing¹,

Zhang²,

Zou³

et al. 2021

PIER M

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A conformal quasi-isotropic dielectric resonator antenna (DRA) is first investigated for wireless capsule endoscope (WCE) application under the 5.8-GHz industrial, scientific, and medical (ISM) standard. The probe-fed hemispherical DRA (HDRA) is studied to match the shape of the spherical dome end, and the characteristic mode analysis (CMA) tool is applied to analyze the resonant modes of the proposed antenna to reveal the intrinsic behavior of the dielectric resonator. It is found that the quasi-isotropic radiation pattern can be achieved by combining HDRA's TE 111 sin ϕ mode which radiates like a magnetic dipole and a small ground plane's TM 10 mode that radiates like an electric dipole. In order to reach the requirement of 5.8 GHz in ISM, a ceramic hemispherical dielectric resonator with dielectric constant of 21.984 is investigated. The radius of the hemisphere is set to 5.35 mm. In free space, the measurement results show that the proposed antenna achieves 3.25% bandwidth, 86% maximum efficiency, and 7.2 dB gain deviation. The antenna is also measured in pork to approximate human body environment. The measurement results demonstrate that the antenna achieves 3.20% bandwidth, 8.15% maximum efficiency, and 9.0 dB gain deviation. Accordingly, the proposed antenna is suitable for WCE application at 5.8 GHz ISM standard.

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Compact filtering antenna using asymmetric CPW-fed based CRLH structure

Cited by 12 publications

References 19 publications

Wideband Self-Decoupling Dielectric Patch Filtennas With Stable Filtering Response

Wideband Self-Decoupling Dielectric Patch Filtennas With Stable Filtering Response

Synthesis approach to design a compact printed monopole filtenna for 2.4 GHz Wi‐Fi application

A Conformal Quasi-Isotropic Dielectric Resonator Antenna for Wireless Capsule Endoscope Application

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