Broadband Circularly Polarized Filtering Antennas

Dong, Yazhou; Gao, Steven; Luo, Qi; Wen, Lehu; Mao, Chunxu; Dong, Shi-Wei; Li, Xiaojun; Wei, Gao; Geyi, Wen; Geng, Youling; Cheng, Zhiqun

doi:10.1109/access.2018.2883494

Cited by 20 publications

(11 citation statements)

References 29 publications

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“…But these antennas have the same disadvantage: the operating bandwidth is too narrow. In [14], [19], two EMSIW antennas with impedance bandwidths larger than 16% are proposed. Parasitic resonators and parasitic strips are introduced to improve the impedance bandwidth and axial ratio bandwidth.…”

Section: Summary and Comparisionmentioning

confidence: 99%

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A Low-Profile Eighth-Mode SIW Antenna With Dual-Sense Circular Polarization, Enhanced Bandwidth and Simple Structure

Zhou

Yang

2021

IEEE Access

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A practical method, which based on eighth-mode substrate integrated waveguide (EMSIW), is investigated in this paper to design low-profile antenna with dual-sense circular polarization (CP) and enhanced bandwidth. First, an eighth-mode radiating cavities is presented and excited by single coaxial probe for size reduction and directional radiation. Then, two EMSIW antennas are placed symmetrically and a triangular parasitic patch is introduced between two EMSIW cavities. Attribute to the weakly coupled effect between the radiation aperture and triangular parasitic patch, dual-sense circular polarization characteristic and an additional resonance are acquired. When the triangular patch is transformed into a square parasitic patch, the current path on the parasitic patch is shortened, and a new resonance point is generated at 3.55 GHz. While the resonant mode of the two eighth-mode radiating cavities are almost unaffected and the CP bandwidth varies with the changed current path. Finally, a dual-sense CP EMSIW antenna with extended bandwidth and simple structure is designed and fabricated. The overall size of the fabricated prototype is only 0.57λ 0 × 0.54λ 0 × 0.02λ 0 (λ 0 is the free-space wavelength at 3.4 GHz). Measured impedance bandwidth is 10.5% from 3.24 GHz to 3.60 GHz with an isolation up to 11.6 dB and a maximal gain better than 5.74 dBic in two ports is also achieved. Moreover, the characteristics of dual-sense CP and the cross-polarization suppression capability of up to 20 dB in the main beam are obtained in 3.48-3.60 GHz.INDEX TERMS Eighth-mode substrate integrated waveguide, dual-sense circular polarization, parasitic patch, extended bandwidth.

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Section: Summary and Comparisionmentioning

confidence: 99%

“…However, comparing the impedance bandwidth of the antenna in [15], [18], it can be seen that the most excellent impedance bandwidth is only 2.42%. Meanwhile, a broadband left-hand CP filtering antenna fed by an EMSIW resonator is presented in [19], the measured operating bandwidth is more than 18.5% with single circular polarization.…”

Section: Introductionmentioning

confidence: 99%

A Low-Profile Eighth-Mode SIW Antenna With Dual-Sense Circular Polarization, Enhanced Bandwidth and Simple Structure

Zhou

Yang

2021

IEEE Access

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“…In Xie et al, 9 the use of a dual‐mode cavity resonator based on substrate‐integrated waveguides was not only to increase the BW of the filtering slot antenna but also to increase the selectivity of the frequency. A SIW cavity‐backed structure employed beneath a truncated patch was used to provide filtering functionality to the circularly polarized patch antenna 10 . Different feed techniques utilized in Tang et al 11 were to realize the filtering and tri‐polarization diversity features to the microstrip patch antenna.…”

Section: Introductionmentioning

confidence: 99%

A filtering waveguide aperture antenna based on all‐resonator structures

Mahmud

Salih

Shang

et al. 2023

Micro & Optical Tech Letters

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In recent years, there has been a large amount of attention focused on the design of filtering antennas to reduce the front-end size of modern wireless communication systems. Although numerous design approaches are presented in the literature, they are usually applicable to a certain microwave circuit structure. Additionally, their implementations demand extra matching circuits or a structure which leads to an increase in the filtering antenna size. In this paper, the design of a 3rd-order filtering antenna operating at the X-band frequencies is presented utilizing the coupling matrix approach. It is based on 3rd order coupled-resonators filter without employing any extra structure. For the physical configuration, three inline coupled rectangular waveguide cavity resonators operating at TE 101 mode are employed. The output of the last resonator is coupled to free space via a rectangular aperture. The dimensions of the aperture are manipulated to control the radiation quality factor (Q r ). To validate the simulated results, the design has been fabricated using the Computer Numerical Control technique. Excellent agreement between the simulation and measurement results has been obtained. The fractional bandwidth (FBW) is more than 10% when the reflection coefficient S 11 = −20 dB. The gain response is very flat (7.54 ±0.2 dBi) from 9.5 to 10.5 GHz. The proposed filtering antenna is compact and low profile which may be of interest in radar applications.aperture antenna, coupling matrix theory, filtering antennas, waveguide cavity resonators | INTRODUCTIONRecently, integrations among the front-end components of wireless communication systems have become more popular, particularly among bandpass filters (BPFs) and antennas (so-called filtering antennas). [1][2][3][4] Such integration not only introduces filtering functionality to the antenna, but also reduces the losses and the front-end size of the system. 5 Numerous approaches have been presented in the literature to enhance the bandwidth (BW) of the filtering antennas so as to increase the data rate capability and reduce spurious signals.

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“…Additional bandwidth enhancement techniques of filtering antenna arrays have been reported in [9]. Filtering the array feed network and making the cascaded radiators act as the last coupled resonators of the BPF is another technique which has been utilised in the design of filtering array [10].…”

Section: Introductionmentioning

confidence: 99%

Filtering two-element waveguide antenna array based on solely resonators

Mahmud

Awl

Abdulkarim

et al. 2020

AEU - International Journal of Electronics and Communications

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Broadband Circularly Polarized Filtering Antennas

Cited by 20 publications

References 29 publications

A Low-Profile Eighth-Mode SIW Antenna With Dual-Sense Circular Polarization, Enhanced Bandwidth and Simple Structure

A Low-Profile Eighth-Mode SIW Antenna With Dual-Sense Circular Polarization, Enhanced Bandwidth and Simple Structure

A filtering waveguide aperture antenna based on all‐resonator structures

Filtering two-element waveguide antenna array based on solely resonators

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