A novel circularly polarized filtering antenna with high out‐of‐band radiation rejection level

Qu, Meijun; Li, Mingxing; Yao, Lidan; Rao, M Venkateshwara; Li, Shufang; Deng, Li

doi:10.1002/mop.30929

Cited by 9 publications

(7 citation statements)

References 16 publications

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“…Out‐band rejection is the difference between the gain within passband and the gain out of band. Compared with the prior filtering antennas, our proposed antenna has higher roll‐off rate and better out‐band rejection.…”

Section: Measurement and Analysis Of The Proposed Antennamentioning

confidence: 99%

A high‐selectivity dual‐polarization filtering antenna with metamaterial for 5G application

Zhai

Wei

et al. 2018

Micro & Optical Tech Letters

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A high‐selectivity dual‐polarization filtering antenna with metamaterial is presented in this letter. The multilayer coupled radiation structure of the antenna determines a filtering function. With the metamaterial layer designed above the antenna, a sharp roll‐off rate at high pass band edge and a better out‐of‐band rejection occurs, thus a better high selective filtering characteristic can be achieved. Simulating and measuring the antenna, the impedance bandwidth (VSWR <2) of the antenna is from 3.25 GHz to 3.85 GHz; meanwhile, the maximum gain can reach 9dBi. The gain of antenna can quickly decrease 43dBi at the high pass band edge from 3.85 GHz to 4.05 GHz and the antenna has an out‐of‐band rejection level of 27dBi from 4.05 GHz to 5 GHz. The tested results verify our designs and the antenna could be a good candidate for the 5G anti‐interference wireless terminal communication system.

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Section: Measurement and Analysis Of The Proposed Antennamentioning

confidence: 99%

A high‐selectivity dual‐polarization filtering antenna with metamaterial for 5G application

Zhai

Wei

et al. 2018

Micro & Optical Tech Letters

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“…Hence antenna with a pre‐filtering function is a feasible solution for these problems . Though filtering characteristics can be achieved by cascading bandpass filters after antennas, these designs typically have a large circuit size.…”

Section: Introductionmentioning

confidence: 99%

Dipole filtering antenna with quasi‐elliptic peak gain response using parasitic elements

Niu

Tan

2019

Micro & Optical Tech Letters

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A dipole filtering antenna with a quasi-elliptic peak gain frequency response is proposed. It consists of a driven dipole, a parasitic resonator and a parasitic meandered resonator with the same resonant length. By introducing these two parasitic elements, the proposed antenna has two reflection zeros in the passband and two radiation nulls in the stopbands. An antenna prototype centering at 1.85 GHz is fabricated. Measured peak gain and radiation efficiency achieve minimum values of −7.95 dBi and 4.23% at 1.73 GHz and −4.17 dBi and 7.78% at 1.92 GHz, respectively. The roll-off factor of peak gain is 182.52 dB/GHz at the lower sideband and 281.27 dB/GHz at the upper sideband, respectively. Measured results verify the effectiveness of the proposed design. Compared to conventional dipole antennas, the proposed antenna achieves widen impedance bandwidth as well as filtering frequency performance such as flat passband gain, steep sideband selectivity and high stopband suppression. K E Y W O R D S antenna gain, dipole antenna, filtering antenna, parasitic element, quasielliptic response

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“…In recent years, filtering antennas have achieved more concentration where in an antenna adds up to filtering performance and is reported in References . The filtering characteristics have been obtained mostly by etching or modifying the feed line, resulting in more spurious radiation.…”

Section: Introductionmentioning

confidence: 99%

Implementation of defected ground structure for microstrip filtenna design

Mishra

Lalitha

2019

Int J RF Microw Comput Aided Eng

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A microstrip patch filtenna inspired by defected ground structure (DGS) is presented in this article. It uses modified split ring resonator and capacitance loaded strip as a radiating element. The presented structure is incorporated with a pair of double U-shaped DGS (DU-DGS) to obtain filtering characteristics. The width of DU-DGS plays a vital role in selecting attenuation poles of the filter as well as for the filtenna circuit. The separation distance between the DU-DGS also affects the resonant frequency of the structure. Both radiation and filtration can be performed through a single structure, otherwise known as filtenna. The physical size of the proposed filtenna in terms of guided wavelength is 2.465λ g × 1.160λ g × 0.116λ g at 10.8 GHz, and is comparatively less to others reported, so is considered as a superior feature. The presented filtenna possesses impedance bandwidth of 700 and 1800 MHz at 10.8 and 16.6 GHz, which covers standards of X-and Ku-band, respectively. So, this can be referred to as dual band filtenna. The radiation pattern shows omnidirectionality in both E and H planes at resonance. K E Y W O R D Sdefected ground structure, dual band, filtenna, omnidirectional, split ring resonator

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A novel circularly polarized filtering antenna with high out‐of‐band radiation rejection level

Cited by 9 publications

References 16 publications

A high‐selectivity dual‐polarization filtering antenna with metamaterial for 5G application

A high‐selectivity dual‐polarization filtering antenna with metamaterial for 5G application

Dipole filtering antenna with quasi‐elliptic peak gain response using parasitic elements

Implementation of defected ground structure for microstrip filtenna design

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